Aeration Is a Green and Inexpensive Treatment for Common Well Water Problems

Iron, manganese, and hydrogen sulfide are common problems with well water.  There are a variety of ways to treat them, but most involve using an “oxidizer” to prepare the targeted contaminant for removal by a filter. Chlorine, potassium permanganate, and hydrogen peroxide are often used as oxidizers, but one of the very best, the least expensive, and “greenest” is plain old air.  Air can be applied to well water problems in a variety of ways.  Read on for details.

Water News in a Nutshell.

Iron and hydrogen sulfide (H2S) are common well problems that frequently occur together and often lend themselves to similar treatment. Iron corrodes appliances, ruins clothing in laundry, stops up pipes, discolors fixtures; hydrogen sulfide, or rotten egg odor, makes water unpalatable and unpleasant, blackens plumbing fixtures, and can be a health hazard when severe. Where there is iron, there is often manganese, which in very small amounts can cause black staining and odors.

The standard methods used to treat iron, hydrogen sulfide, and manganese are variations on the same three-step principle of oxidation, precipitation, and filtration. An oxidizer is added to the water, which induces precipitation of the iron, manganese and hydrogen sulfide, and the precipitated contaminant is then filtered out of the water.

A variety of filters are used to remove oxidized contaminants, but here we are concerned only with the first step, oxidation.

The Common Oxidizers

The old-standby oxidizers for years have been chemicals like chlorine and potassium permanganate. Ozone and hydrogen peroxide are more natural oxidizers that are gaining in popularity. Another common oxidizer that is being used with ever greater frequency is air.

Oxidizing with Air

Plain air is a powerful oxidizer of iron, manganese, hydrogen sulfide. It has a variety of advantages, including its low cost and its easy availability. Air adds nothing objectionable to water and leaves no undesirable by-products. Air is in plentiful supply and does not have to be transported to the treatment site.

Air can be applied to water treatment in a variety of ways. We’re going to look at the most popular applications here.

Open Air Tanks and Air Stripping

Air stripping is a technique in which volatile organic compounds (VOCs) are transferred from water to air. Typically, air stripping takes place in a packed tower (known as an air stripper) or an aeration tank.

Traditional air strippers vary in height, and the height is correlated to the chemical concentration of the contaminated water. A recent innovation in air strippers is the low-profile air stripper. These units have a number of trays that are set almost horizontally. Water is cascaded over the trays to maximize air-water contact while minimizing vertical space. Because they are not so visible, they are increasingly being used for groundwater treatment.

Strippers are used most often to rid water of volatile organics (VOCs) and gasses like methane and radon. Methane and radon are often “aerated” by simply allowing the water to stand in an open tank.

For residential treatment of iron, manganese, and hydrogen sulfide, compact closed-tank aeration units are used. Below are some examples.

The Venturi System

The simplest of the closed-tank systems is a passive aeration system that requires no outside power. It pulls air into the water line by means of an induction device called a Venturi. The Venturi (sometimes called a “Micronizer” or an educer) is installed in the water line prior to the well’s pressure tank. As water is forced through the venturi while the pressure tank is filling, air is sucked into the water line. The aerated water then enters a small treatment tank where the air is mixed thoroughly with the water and excess air is vented to the atmosphere. The water then passes to a filter, which removes the oxidized contaminants.

The main advantages of the Venturi system are its low cost, its economy of operation, and its simplicity. The main disadvantage is that the Venturi valve itself restricts water flow considerably. The Venturi works by funneling the entire water stream through a very small hole inside the valve in order to create the pressure differential required to pull air into the water line. This restricts water flow and often makes it difficult to size the filters which follow the unit, since iron filters often require significant backwash volume. Consequently, Venturi systems are most often sold as “one size fits all” units that use a standard 8″ X 44″ aeration tank, relatively easy to backwash filter media, and filter tanks no larger than 10″ X 54″.

Air Pump Systems

A more aggressive approach to aeration, the air pump system uses a small compressor to pack air into a special aeration tank. This system normally has much more air turnover and therefore requires a more complex venting system than the Venturi system.

Air Pump Used for Water Treatment

A typical air pump setup does not restrict water flow (as does the Venturi system), but it uses a small amount of electricity to run the pump and power the solenoid vent valve. Its initial cost is more than the Venturi system. It is a reliable system and little upkeep is normally needed. Any system, it should be noted, that treats iron needs upkeep because of problems caused by the formation of iron deposits within the system itself. Air pump units are no exception.

The strength of the air pump system is that air is a very rapid oxidizer, so much less retention time is needed as compared with chlorine. Normally, the aeration tank itself provides plenty of holding time for air to do its work. And larger air tanks can be used if more contact time is needed.

Single Tank Systems

Yet another style of aerator that has been around for some time is the one- tank system in which aeration and filtration take place in a single tank. This style is usually marketed as single package without options.

The single tank unit maintains an air pocket in the top of the tank. As the service water passes through the air pocket, iron and H2S are oxidized and the oxidized contaminant is then caught by the filter in the bottom portion of the tank. Air is introduced by venturi draw, but not by an added venturi unit as with the simpler system above. In this type, the unit is controlled by a modified water softener valve which is made to draw air into the tank during the “brine draw” phase of its regeneration cycle.

With this type system manufacturers usually claim effectiveness against six to eight ppm of hydrogen sulfide and 8 or so parts per million iron. Different media are used in the tank depending upon if iron or hydrogen sulfide is the main targeted contaminant.

Single tank systems are relatively expensive because of the sophisticated control head, and they lack versatility. However, they can provide excellent, trouble-free service, and installation is simple.

Pure Water Products Aeration Offerings

We’ve been selling aeration devices since the early 1990s. We currently feature our slightly modified version of a national brand called AerMax. It’s a closed tank system with a small air pump. We stock complete systems, accompanying filters, and all parts. We also offer optional add-ons to the AerMax like the flow switches and a “double aeration” feature for enhanced treatment of hydrogen sulfide.

We have an air pump parts page, offer repair kits and even some reconditioned air pumps. We stock the less expensive Venturi systems and parts, although we don’t have them on our main website.

In the twenty years we’ve sold aeration devices, we’ve never marketed them as “green” products. When you think of it, though, what could be “greener” than a treatment system that uses a renewable resource, requires only minimal energy, keeps chemicals like chlorine and potassium permanganate out the environment, and has no negative environmental impact at the point of use?

More about aeration from the Pure Water Products website.

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What Causes Odors in Water


Posted February 18th, 2013

  Finding the Source of Foul Odors in Water and Getting Rid of It

 adapted from a February 2013 article in  Water Technology.

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 Water News in a Nutshell

With the drought much of the U.S. has experienced during the last two years, odor related issues in water have become more severe. Odors can come from excess chlorine, from hydrogen sulfide, from improperly installed equipment–from a variety of causes. Common rotten egg odor usually called hydrogen sulfide can have a variety of causes.  Hot water heaters are often involved.Chlorine and hydrogen peroxide are often used to get rid of unwanted odors. Always read the manufacturer’s instructions and always call a professional if you ever smell something that doesn’t please you.

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Smell is one of the five major senses we have and certainly one we use on a daily basis. Whether it’s the coffee we drink in the morning, the tempeh sandwich for lunch or the weird stench coming from the back of the car, we all use our sense of smell all the time. Some smells we like.  Others we don’t.

Finding the source

Often, a smell will come into a home or office unannounced and finding the cause of that smell is a frustrating task. If you find out the smell is coming from your water, the first thing you should do is contact the professionals or your local water utility board.Poor maintenance can be to blame for some foul odors. If a fixture was improperly installed, then it would be best to call the person who installed it to come and fix the problem.One water treatment expert lists improper maintenance as one of his two reasons for offensive odors in point-of-use (POU) drinking water systems, along with improper contaminant identification and subsequent improper pretreatment techniques.The foul odor associated with water is usually described as a rotten-egg smell. If you’ve ever experienced this problem with water or been around an actual rotten egg, then you probably know the smell.Hydrogen sulfide is normally pegged as the reason for a rotten-egg smell. Sometimes the hydrogen sulfide odor may only be present in the household’s hot water only. This indicates a problem with the water heater. 

The chlorine effect

But, say experts, the most common cause of odor in drinking water comes from chlorine. Chlorine is added by municipalities to disinfect water by killing bacteria and harmful viruses.“If your home uses water supplied by a public water treatment plant, the level of chlorine will be higher the closer you are to the treatment plant rather than a water user located several miles further away,” says one expert.

“The chlorine dissipates in the water lines and the treatment plant must ensure users the furthest away have an adequate chlorine level for disinfection. Also, at times the treatment plant may add higher levels than normal of chlorine due to maintenance or water related issues.”The disruption caused by the use of chlorine may be annoying and seem unpleasant to drink, but it is usually deemed safe by utility departments using this process.On occasion some municipal systems may experience a loss of chlorine residual which can result in a rapid increase in microbial activity. In the presence of sulfates accompanied by a loss of chlorine residual, nascent levels of sulfate reducing bacteria can grow exponentially and produce hydrogen sulfide gas from sulfates. Generally speaking, the higher the levels of combined sulfates and total organic carbon (TOC), the greater the potential for this occurrence.This becomes more of a problem during warm weather seasons. As the water heats up microbial activity increases, causing a foul odor smell.This phenomenon can occur either in the water mains, or more often it happens after the fact once the water has been dechlorinated by the point-of-entry (POE) or POU system.

Metallic odors may be due to the kind of piping used, while chemical odors may be due to flux used in soldering. Most of the time, the odors subside as water flows through the heater and over time.Lastly, another common cause of taste and odor issues comes from geosmin and 2-methylisoborneaol (MIB). These are naturally occurring compounds produced by blue-green (cyan bacteria), diatoms and actinomycetes.During the summer these organisms multiply in warm surface water, then die. The geosmin and MIB are then released into the water causing an odor, typically described as Earthy-musty.

These compounds do not affect human health, but can be detected by human senses at parts per trillion (ppt) levels.As you can see, there are many reasons why we experience odors in our water. Finding the source of that smell is very important, and usually something that should be done by a professional.

Dealing with foul odors

Now that we know some of the causes of water related odors, the next step is to figure out how to eliminate them. We talked to a couple different experts on the subject who offer varying views on how to treat foul odors.As mentioned above, good maintenance is the best way to reduce and prevent odors. This is especially true when dealing with hydrogen sulfide in a POU device. In this case, the first line of attack is proper maintenance.

Good maintenance is very simple and most often prescribed in detail by the manufacturer. Always refer to the manufacturer’s recommendations for maintenance.Other methods are frequent filter changes along with sanitizing the system. Properly sanitizing with sodium hypochlorite or hydrogen peroxide with help eliminate odors.Activated carbon is another solution to help reduce odors.

Remember, during the summertime municipalities increase their chlorine dosage so it’s important to replace the activated carbon in the spring time before it becomes over saturated with contaminants.Activated carbon systems excel at removing all of these odors. Granular activated carbon should be used for whole house point-of-entry systems, and carbon blocks or granular activated carbon for point-of-use systems. For hydrogen sulfide odor, a special surface-enhanced activated carbon is recommended.

Surface-enhanced activated carbons are specifically made to handle hydrogen sulfide odor more effectively than traditional activated carbons.That leads us back to the rotten-egg smell. Customers that are experiencing this issue can choose between temporary and more lasting treatment options.Peroxide is a temporary fix to rotten-egg odor in all situations, but the next time the heater sits idle, odor will return.

Chlorine bleach can also be used, but it is much more dangerous. The bacteria that cause the odor, otherwise harmless, are anaerobic, which means oxygen kills them. Both peroxide and bleach provide that oxygen. But, peroxide does not have to be flushed out of the system after use.Some odors are wrongfully blamed on the water heater. If a person has odor in one bathroom, but not another, then application of chlorine bleach to drains and sink overflows will probably make a difference.Another solution for rotten-egg odor issue is to remove the sacrificial anode, but this will void the warranty for every water heater made in the U.S. and it reduces its lifespan.

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Pharmaceuticals Are Getting into Water and Changing the Way Fish Act

Water News in a Nutshell.

 

Gazette’s Summary: Mind-altering drugs taken by humans are being excreted into lakes and steams.  Swedish scientists studied the effects of these drugs on fish and found that they alter fish behavior and as a consequence change the environment. Read on for full details.

Psychiatric medicines that are excreted by humans and find their way into waterways can change the behavior of fish in rivers and streams, scientists report in a new study. 

Researchers found that wild European perch exposed to the anxiety-moderating drug oxazepam in an experimental pond in Sweden were less fearful and are more aggressive feeders.

Ecologists worry that such changes in fish behavior could lead to unexpected ecological consequences, including changing the composition of species in waterways and increasing the risk of potentially toxic algal blooms.

“This is only one of hundreds of kinds of [pharmaceutical drugs] that are passed through wastewater plants, and we don’t know what their environmental effects will be,” said study coauthor Micael Jonsson, an ecologist at Sweden’s Umea University. 

The new study, detailed in this week’s issue of the journal Science, also found that water downstream from sewage treatment plants in Sweden contain concentrations of Oxazepam that experiments have shown are capable of changing fish behavior. 

The findings add to a growing body of evidence that pharmaceutical drugs can do more than just poison fish or change their physical characteristics. An earlier study conducted by scientists in Minnesota at St. Cloud State University showed that fathead minnows exposed to various antidepressants in the laboratory were slower at avoiding predators.

This latest study expands the list of mood altering chemicals to a different class of drugs – those used to treat anxiety disorders.

Wild European Perch

“Before this, people had talked at [scientific] meetings about how you would expect this kind of drug to affect fish behavior, but what these researchers have done is show, very elegantly, how fish behavior has changed, and not just one aspect either, but several aspects,” said Patrick Phillips, a hydrologist with the U.S. Geological Survey in Troy, N.Y., who was not involved in the study. 

Perch are normally shy and hunt in schools. But Jonsson and his team found that those exposed to Oxazepam were bolder, less interested in hanging out with the group, and more likely to strike out on their own to explore novel, potentially dangerous areas.

“We were actually a bit surprised because [Oxazepam] is supposed have a soothing effect. Humans usually become calmer. But we saw the opposite in fish,” Jonsson said.

Normally, perch are constantly on the lookout for larger predator fish. The researchers speculate that the medicated perch are bolder because they are calmer.

“When they get exposed to this drug, they lose that inhibition, so they don’t care anymore,” Jonsson said.

Not only were the medicated perch braver, they also ate faster. In the long term, this combination of fearlessness and a larger appetite could lead to ecological disturbances that are hard to predict, scientists warn. Perch feed on tiny microorganisms called zooplankton, which in turn feed on algae.

“If the zooplankton decrease in number, the algae might increase, and you could have a situation where you have more algal blooms,” Jonsson said.

Alternatively, the perch population might actually decrease because drugs have made them foolhardy towards predators. But then again, “we don’t know how larger fish will react to this kind of medication,” Jonsson said.

There is also worry that some drug effects on wildlife won’t be apparent for years or decades.

“We’re just beginning to understand what the ultimate consequences may be from these kinds of exposures,” said research hydrologist Dana Kolpin, of the USGS Toxics Substances Hydrology Program, who also did not participate in the study.

According to scientists, it’s also likely that the ecological changes they worry about are already happening.

“It’s not all of a sudden that [medicines] are in the environment,” Kolpin said. “There are papers going back to the 1970s that say pharmaceuticals are potential environmental contaminants. We just didn’t have the analytical tools until more recently [to prove it].”

Most studies have shown that humans are unlikely to be affected by trace amounts of drugs in drinking water, but Kolpin suggests more research is needed.

“We just do not know enough about aspects such as sensitive populations” – including infants and pregnant women – “or effects from chronic exposures to complex chemical mixtures,” Kolpin said.

Jonsson and his team stressed that the solution to the problem is not to stop medicating ill people, but to develop ways for sewage treatment plants to capture environmentally hazardous drugs.

Experts say technology exists that can reduce, if not fully purge, drugs from waste water, but upgrading every waste treatment plant would be prohibitively expensive.

A more sensible, and realistic, approach would be to identify those classes of medicines that are most harmful to wildlife.

“We are realizing that some compounds are worse actors than others, and if we can identify those, then we can be more targeted in our approach for preventing their release into the environment,” Kolpin said.

Source: Inside Science.

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Freshwater Volume Equivalent to the Dead Sea Has Been Lost

A NASA study found that an amount of freshwater almost the size of the Dead Sea has been lost in parts of the Middle East due to poor management, increased demands for groundwater and the effects of a 2007 drought.

The study, to be published Friday in Water Resources Research, a journal of the American Geophysical Union, examined data over seven years from 2003 from a pair of gravity-measuring satellites. Researchers found freshwater reserves in parts of Turkey, Syria, Iraq and Iran along the Tigris and Euphrates river basins had lost 117 million acre feet of its total stored freshwater.

About 60 percent of the loss resulted from pumping underground reservoirs for ground water and another fifth due to impacts of the drought including declining snow packs.

The study is the latest evidence of a worsening water crisis in the Middle East, where demands from growing populations, war and the worsening effects ofclimate change are raising the prospect that some countries could face sever water shortages in the decades to come. Some like impoverished Yemen blame their water woes on the semi-arid conditions and the grinding poverty while the oil-rich Gulf faces water shortages mostly due to the economic boom that has created glistening cities out of the desert.

Beer Is Mainly Water, So Brewers Are Very Worried About Fracking

Brewers are becoming vocal in their opposition to fracking.  Since the quality of beer depends greatly on the quality of the water it is made with, and most good brewers have built their businesses around a reliable source of excellent water, it is only natural that brewery owners get nervous when their is talk of fracking in their area.  As a leading brewer in Cooperstown, NY  put it, “Accidents are happening. Places are getting polluted.”

The owner of the Ommegang brewery in Cooperstown discussed the issue with The Washington Post  recently.  He says that brewers have equipment that  can filter sediment from water and adjust pH levels, but they do not have the equipment to filter out some of the potential toxic chemicals that could enter the water supply via fracking, including benzene, methane and even diesel fuel. If the water becomes polluted, the company may need to truck in water, move or shut down the brewery altogether — a last-ditch effort that would cost the region about many jobs.

Other brewers have voiced similar concerns.  Much of the issue hinges on the who should be permitted to make decisions to allow fracking.  In the Cooperstown area some local farmers are opting to allow fracking. This is not a popular decision among brewers and others, like dairy farmers, who rely on the purity of local water to sustain their businesses.

Unfortunately for Ommegang Brewery, some nearby farms are tempted to sell natural gas leasing rights on their property, deals that could bring them much-needed income. One dairy farmer in Cooperstown said she is convinced fracking can be done safely and it will not threaten milk production on her farm.
Several towns in the region have approved fracking, a contentious decision throughout the area. Another local dairy farmer, Cooperstown Holstein, has filed a lawsuit alleging that only the state, not individual localities, has the authority to approve fracking operations. That case is currently being argued in the New York State Supreme Court.
Reference: Grist

A Zen Buddhist, a Muslim, a Christian and an attorney of undetermined religious affiliation walk into a bar. . .

Introductory Note:  The spiritual aspects of water are not a new topic.  The Gazette looked at the spiritual side of water at some length in “The Gazette’s Great Water Article,” some years ago.

Thales of Miletus. known as the Father of Greek Philosophy, founded his school of thought over 2,500 years ago on the premise that “All things are water.” On the other side of the globe, Taoists like Lao-tzu and his disciple Chuang-tzu were teaching that water is the model for human behavior, the tangible expression of the flowing, organic pattern of nature. “Man is water,” Chuang-tzu said. “It congeals to form man, and his nine openings and five viscera appear. . . . What is it, then, that has complete faculties? It is water. There is not one of the various things that is not produced through it. It is only he who knows how to rely on its principles who can act correctly. . . .”

Although water may indeed be the measure of all things, our society has done its best to trivialize it.  It is, therefore, refreshing to see that a group of spiritually minded individuals got together recently to discuss something more serious than channel dredging or the evils of fracking. Hardly Waite, Gazette Senior Editor.

Holy Water

by Tom Gacoyne

New construction, whether of dams, reservoirs, canals or two giant tunnels under the Sacramento-San Joaquin Delta, will not solve the state’s water problems. That seemed to be the message issued at a forum on the Chico State campus Tuesday (Jan. 5) that featured five speakers, including a Zen Buddhist, a Muslim, a Christian and an attorney of undetermined religious affiliation.

The forum, according to a press release, was a “focus on the spiritual and stewardship issues that surround water, including water as an element to all life, as a human right, and as a contentious public policy in Californian and beyond.”

It is time, speakers suggested, to change our collective mindset and respect the Earth and our neighbors.

“All we need is the will and commitment,” said Bruce Grelle, professor of religious studies at Chico State. “This is not just an environmental crisis,” he said. “It’s a moral crisis.”

The forum was a joint production by the Butte Environmental Council and Chico’s State’s Book in Common Group, which this year has chosen Robert Glennon’s Unquenchable: America’s Water Crisis and What to Do About It.

Bill Loker, the university’s dean of undergraduate education, introduced the speakers and credited Grace Marvin, a local environmental activist, with the idea of having different faiths represented in a discussion on water. Loker organizes the Book in Common program.

“How many have read the book?” he asked the 50 or so in attendance. Only a few raised their hands. “Raise your hands if you are interested in water issues.” Not surprisingly, almost everyone did so.

Before the speakers started, BEC’s Nani Teves mentioned Gov. Jerry Brown’s push to build two “peripheral tunnels” under the Delta to help transfer North State water south, a project greatly criticized by local environmental groups like BEC and AquAlliance, who fear it will drain the Tuscan aquifer that supplies water to the region.

“We don’t know what he’s thinking, but we want him to know how the North State feels about exporting more water down south,” she said, asking those present to sign a petition protesting Brown’s project.

“This is important because we’re a small vote up here compared to the rest of the state,” she said.

Grelle, the first speaker, said the panelists had been asked to focus on spiritual and stewardship issues when it comes to water.

“When thinking about spiritual issues surrounding water, I’m reminded of water’s rich symbolic significance in many of the world’s religions. For example, its role in purification rights in Judaism and Hinduism and Islam or the significance in the rites of baptism for Christians and Sikhs.”

He quoted an ancient Taoist take on water as “the way of the cosmos.”

He mentioned Glennon’s book. “I’ve pretty much read the whole thing,” he admitted to laughter from the audience. “I skipped around a few parts.”

The book is filled with ways we use and misuse water, he said, and how “we fight over water even when we take it for granted.”

The problems we face with water, he said, “require a change of character, not a technological fix.”

He mentioned writer Wendell Berry and essays he’s written on the matter of water and the ethics of stewardship. He offered this from one of Berry’s books: “We as humans have that limitless capacity to ignore reality and an arrogant refusal to accept that we are human and not God.”

The next speaker was Lin Jensen, author of six books, former farmer and college professor and current Zen Buddhist teacher.

“We all wear shoes,” he said. “Not all the time, but we’ve lost contact with the dirt under our feet as a result.”

The living Earth, he said, may be underfoot or under pavement, “but the Earth is still there.”

What is sacred in Zen, he said, is “not just the vegetables, the human beings, the birds, the animals, the fish. It’s also the mineral. It’s the earth, the air, the water that is sacred. And that is a concept that Zen has in common with deep ecology.”

Buddhism, he said, is an atheistic tradition, which throws responsibility back on humans. “Everything you touch, including the soil under your feet, is sacred. So is what’s below, in the Tuscan aquifer, which is equally sacred.”

We need to treat the earth as if it were our own body, he said. “It is our body. What are we made up of? Mostly water, but a lot of other little minerals and bits and a good deal of air.”

Marty Dunlop is a lawyer and founder of Citizens Waterwatch, a watchdog group. She said she went to law school “to help provide a service and a voice for the environment, Mother Earth.

“I know it’s hard to believe that a lawyer has ethics,” she joked. “But laws are enacted to make humans behave in a responsible way.”

She listed the state’s environmental laws, including the California Environmental Quality Act, passed in 1970 to make sure local agencies “put protecting the environment in every decision that is made” and requiring the public be part of the process.

She also mentioned the Public Trust Doctrine, which came out of a court case concerning Mono Lake and basically ruled that all resources belong to the public, and the state constitution, which says “water is a resource that belongs to the people of California.”

“Water,” she said, “is a finite resource, a closed system. We don’t make new water.”

Ali Sarsour, a Chico State graduate, former candidate for Chico City Council, longtime local resident and a Muslim, spoke next. He lightened the mood.

“Are there any Muslims here?” he began. Seeing no response, he said “Good. Anybody who is an expert in Islamic theology?” That was met with laughter. “Good, then there will be no contradictions and I can say anything I want to.

“All living things are originated from water. Since our lives and the lives of every living thing are sacred, water is the most sacred element of the universe.”

Shirley Adams is founder of Bridging the Gap by Giving, a local foundation that raises money for clean water in developing countries. She puts on “Walk for Water” event each year.

“We have a big thirsty world, “she began.

She said while visiting overseas she realized how blessed her life is. “I was more blessed than probably 80 percent of the people in the world,” she said. “God spoke to me—I heard it in my heart and head: ‘I want you to start bridging the gap.’”

She said she sent out a form letter to about 100 people to get her foundation started, and among the responses was a check for $1,000, which got the program underway. Since then, she said, Bridging the Gap has brought clean water to 15,000 Africans.

Adams showed a PowerPoint presentation with photos of smiling young people in Africa who have received the water. “These people are thriving, not just surviving,” she said. “That is the difference water makes.”

Reprinted from Chico News and Review.

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Garden Hose Filters


Posted February 12th, 2013

The Garden Hose Filter: A Versatile and Very Useful Tool

 

The garden hose filter above, mounted on a stand designed by its owner, is used to soften water used for rinsing roof-mounted solar panels.  Softening the water prevents streaking and scale build-up on the panels and allows the user to avoid the dangerous and difficult task of climbing onto the roof to hand-clean the panels.

This is only one of many uses of the very versatile garden hose filter.  Other common uses are providing clean, good-tasting drinking water for work crews via a garden hose, removing chlorine or chloramine from water used to irrigate organic gardens, providing chemical-free water for fish ponds and aquariums, removing sediment that can stop up irrigation emitters, providing soft water for washing cars, boats, motorcycles, patios, driveways, and, as stated, roof-mounted solar panels.

Cartridge-style  garden hose filters come in many sizes.  The filter above uses the largest–the 4.5″ X 20″.  Other popular sizes accommodate 2.5″ X 9.75″, 2.5″ x 20″, and 4.5″ X 9.75″ cartridges.  They can be wall mounted, mounted on a custom-made stand, like the filter above, or simply tossed on the ground.  They are durable: dirt and water don’t hurt them.

 

Garden hose filters come in many styles and varieties. Here’s a double filter in a clear housing. It accepts the popular 9.75″ X 2.75″ cartridges.

Speaking of variety, here’s a unique application that was featured in the Pure Water Occasional at the time of last year’s National Garden Hose Day celebration.

Another unique use for a garden hose filter is providing chlorine-free water for chickens via a “chicken nipple.” The standard garden hose filter was adapted to prefilter water on its way to the chicken nipple.

Go here for everything you ever wanted to know about garden hose filters.

The Centers for Disease Control Provides Easy Access to Information About Your Local Water’s Fluoride Content 

Fluoride is one of the more controversial issues in water treatment.  A part of the issue that is frequently overlooked is that the amount of fluoride added or maintained by the water supplier should be  an important part of the discussion, as should also the nature and origin of the fluoride that is added.

Certainly there is a difference between naturally occurring fluoride and the industrial waste product that usually serves as a tap water additive, but there is probably a more significant difference between 4 ppm fluoride (currently the EPA upper allowable) and 0.7 ppm, which is what is now being recommended for cities with warm climate.  (There is an assumption that in warm weather areas, people drink more water and therefore should have less fluoride in their tap water.)

We should note that many of the recent studies that show the brain-killing effects of fluoride were done in areas whose water has very high fluoride levels.  Does this mean that if a lot of fluoride damages children’s brains a lot, a little fluoride will damage children’s brains a little?  Perhaps, but not necessarily.  Everything, including water and tomato juice and vitamin C, is toxic if the dose is high enough.  It doesn’t take much fluoride to be too much, but it doesn’t necessarily follow that a small amount is toxic.

US water suppliers add fluoride at different levels.  Optimal fluoride levels recommended by the U.S. Public Health Service and CDC for drinking water range from 0.7 ppm for warmer climates to 1.2 ppm for cooler climates to account for the tendency for people to drink more water in warmer climates.

To illustrate, two major US cities, fluoridate as follows:

New York City, a northern city — 1 ppm.

Denton, TX, a southern city — 0.7 ppm.

The Centers for Disease Control maintains a website where you can check the current fluoridation practices of your local water supplier.

One final comment.  An infrequently mentioned fact about fluoridation of municipal water supplies is that it is not as exact a science as the public often believes.  Fluoride levels can vary considerably from one part of a city to another and from one day to the next.  This is especially true of small water supplies where a lot is being entrusted to personnel whose training is not always up to the job.  The very realistic concern that what is intended to be 1 ppm may well arrive at your home as 4 or 5 ppm should make you consider a protective drinking water treatment for your home.

 

 Pure Water Annie Explains Sediment Filters

Pure Water Annie’s technical articles appear regularly in the Pure Water Occasional.

 

Water filters have many purposes. Some are designed to remove chemicals from water. Others remove metallic contaminants or “dissolved solids” or charged particles.

This article is about filters that remove suspended solids, variously referred to as turbidity, sediment or particulate.

In general terms, filters of this type are sieving devices. They are like nets that catch and hold particles that are too large to pass through the holes in their surface.

There are large backwashing filters that perform this function. They use beds of natural media like sand, garnet, and anthracite to filter out unwanted particles like dirt or iron rust. The newer versions usually rely on specifically designed and manufactured media with brand names like Filter Ag, ChemSorb, or Micro Z to catch particles. When particles are trapped in the bed, the filter “backwashes” by running water backward through the media bed to wash the unwanted particles down the drain.

This article, however, is about cartridge-style filters rather than backwashing filters. Cartridges are for the most part disposable items. Except in rare cases, they are not backwashed. They are used until they stop up, then they are discarded. Certain cartridges can be cleaned and reused, but most are discarded when dirty.

Here is a picture of a sediment filter cartridge that has done its job and has been replaced:

 

Sediment cartridges are usually made of would string, like those above,  of “melt blown” polypropylene,  or of thin sheets of polypropylene arranged into accordion-like folds.

They are classified by the size of particles, measured in microns, that they will allow to pass.  Common sizes are 1 micron, 5 micron, 20 micron, etc., with the smaller the micron number, the tighter the filter and the smaller the particles it will trap.

There is no “best” material or size when it comes to sediment cartridges.  They must often be chosen by trial and error.  The tighter the filter, the more it restricts water flow, so small micron sizes aren’t necessarily best.

A look at a closeup of the dirty filter above will demonstrate how hard it is for even tiny particles to pass through.

 

For more details about sediment filters, see How Sediment Filters Work and Sediment Filters on the Pure Water Occasional’s website.

 

Lolong Dies of Unknown Causes


Posted February 11th, 2013

 Lolong, The World’s Largest Saltwater Crocodile in Captivity, Dies in the Philippines

In its September 2011 issue, the Pure Water Occasional reported the spectacular capture of Lolong, the world’s largest saltwater crocodile in captivity, near a small southern town in the Philippines.

Lolong, When Captured in September 2011

Now we must report that Lolong has died of unknown causes.

Although the giant crocodile was hunted and captured as a safety measure after he had been blamed for the deaths of several villagers, after his capture he become a local celebrity and a formidable tourist attraction that brought fame and dollars to the town of Bunawan.

Bunawan  plans to preserve the remains of the 1-ton crocodile in a museum to keep tourists coming and stop the community from slipping back into obscurity,

Lolong was declared dead after he was  found floating on his back with a bloated stomach in a pond in an ecotourism park which had begun to draw tourists.  The fame of the immense reptile was spreading rapidly, and the town was planning a new road to accommodate tourists.

The cause of death is unknown, and an autopsy will be performed by wildlife experts.

Lolong was estimated to be over 50 years old.  He measured 20 feet 3 inches in length and was proclaimed the world’s largest saltwater crocodile in captivity by Guinness World Records.

According to Yahoo News:

Even though Lolong was blamed for the deaths of several villagers over the years, Bunawan villagers grew to love the giant reptile because it came to symbolize the rich biodiversity of the marsh where it was captured. The vast complex of swamp forests, shallow lakes, lily-covered ponds and wetlands is home to many animals, including threatened species such as the Philippine hawk eagle.

Various religious groups offered prayers Monday and spiritual leaders also planned to perform a tribal funeral rite, which involves butchering chickens and pigs to thank forest spirits for the fame and other blessings the crocodile has brought, Elordie said.

The rite is to be held at the ecotourism park, where the reptile was a star attraction, drawing foreign tourists, scientists and wildlife journalists to Bunawan, a town of 37,000 people about 515 miles (830 kilometers) southeast of Manila.

 

More from Yahoo News.