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	Household Water Treatment
		Water exceeding about 7 to 8 grains per gallon or approximately 120 mg/l (parts per million) hardness may interfere with the cleaning action of soaps and detergents, and cause scale buildup in hot water pipes, water heaters, and plumbing fixtures.
		Water with a high iron or manganese content is not considered a health problem, but can be very objectionable in taste, odor, or appearance if iron is present in amounts greater than 0.3 milligrams per liter or manganese is present in amounts greater than 0.05 milligrams per liter.
		Water softeners contain a zeolite mineral in the resin that will remove soluble iron on an ion-exchange basis (the same way calcium and magnesium are removed in water softening).
	www.ext.vt.edu /pubs/housing/356-481/356-481.html (2982 words)

	Water Treatment Methods \| CDC Travelers' Health (Site not responding. Last check: )
		In areas where tap water is not chlorinated or where sanitation is poor, there are several alternative methods for ensuring water is safe to drink.
		Cloudy water should be strained through a clean cloth into a container to remove any sediment or floating matter, and then the water should be treated with iodine.
		If water is extremely cold, less than 5° C (41° F), an attempt should be made to warm the water, and the recommended contact time (standing time between adding a chemical disinfectant to the water and drinking the water) should be increased to achieve reliable disinfection.
	www.cdc.gov /travel/water_treatment.htm (977 words)

	Water Treatment Boiler - Water Treatment Books
		Water treatment is required to provide the physical plant with properly treated water in sufficient quantities to meet plant needs.
		Treatment of water that are done outside of the boiler is called pre-boiler or external treatment.
		Chemical treatment or internal treatment of water inside the boiler is essential to take care of various impurities entering into the boiler such as hardness, dissolved solids, oxygen, and silica.
	www.watertreatmentbooks.com /water-treatment-boiler.asp (495 words)

	industrial water treatment, home water treatment, wastewater treatment in Ontario Canada, USA
		Water treatment systems can deliver clean, delicious water to an entire house and helps reduce the problems associated with hard water, which is caused by limescale in pipes.
		Treatment is usually one of two: Feed chlorine to oxidize the organic away from the iron, thus allowing agglomeration to occur, or, feeding polymers that attract the static charge on the particles, forming larger clumps of matter that is filterable.
		Treatment is by feeding polyphosphate or silicates to coat and protect the plumbing, or to aerate the water to release the excess oxygen.
	www.waterbusiness.net (4215 words)

	Water and liquid waste treatment plant and system operators
		Water is pumped from wells, rivers, streams, and reservoirs to water treatment plants, where it is treated and distributed to customers.
		Water and wastewater treatment plant and system operators work both indoors and outdoors and may be exposed to noise from machinery and to unpleasant odors.
		Employment of water and wastewater treatment plant and system operators is expected to grow about as fast as average for all occupations through the year 2014.
	www.bls.gov /oco/ocos229.htm (1927 words)

	Magnetic Water Treatment and Magnetic Fuel Treatment (Skeptical Inquirer January 1998)
		According to the distributors, the magnets sold for water and fuel treatment have magnetic flux densities in the 2,000 to 4,000 gauss range, which is not unusually strong.
		Duffy (1977) provides experimental evidence that scale suppression in magnetic water treatment devices is due not to magnetic effects on the fluid, but to the dissolution of small amounts of iron from the magnet or surrounding pipe into the fluid.
		The understanding of magnetic water treatment must first be developed to the point where the effects of magnetic treatment can be reliably predicted and shown to be economically attractive.
	www.csicop.org /si/9801/powell.html (3902 words)

	Hard water treatment, effects of magnetic water softeners on solar heating with information facts and reviews of other ...
		Water described as "hard" is high in dissolved minerals, specifically calcium and magnesium.
		Hard water is not a health risk, but a nuisance because of mineral buildup on fixtures and poor soap and/or detergent performance.
		Calcium and magnesium dissolved in water are the two most common minerals that make water "hard." The degree of hardness becomes greater as the calcium and magnesium content increases.
	www.hardwater.org (242 words)

	Home Water Treatment Systems Information
		The home water treatment systems area will look at the uses, advantages and disadvantages of water filters, water softeners, water conditioners and water treatment chemicals.
		On the water treatment comparison page, I have summarised the relative merits of each method against one another.
		Water conditioners are an effective, low cost solution to hard water problems such as the build up of limescale in pipes.
	www.water-treatment.org.uk (272 words)

	The Water Treatment FAQ
		And when your storage tank was full, water still ran to the drain because the early membranes were made of a material that the little bugs in your water supply (no, not pathogens, or dangerous to you in small numbers) loved to eat!
		Newer systems not only recover more water to begin with, they may also have a shut off device that stops all water flow when the storage tank is full.
		If you receive your water from a "Public Supply", i.e., a municipal supply, or a supply that provides water to more than 25 persons for 60 days per year (some states are different -- check with YOUR local water department), you can be fairly certain that the water supply is checked on a regular basis.
	www.softwater.com /faq.html (6764 words)

	Water Treatment
		Water treatment is a process of making water suitable for its application or returning its natural state.
		Water in the Great Lakes Region is an organization dealing with the water resources.
		Treatment by activated carbon is mostly due to adsorption or absorption.
	www.science.uwaterloo.ca /~cchieh/cact/applychem/watertreatment.html (2514 words)

	Czech Water treatment, manufacturers Water treatment, exporters Water treatment, importers Water treatment
		Water treatment, filtration on base of reverse osmosis; manufacture, installation and servicing of equipment for production of demineralised water.
		Water demineralisation by means of a reverse osmosis: instruments and equipment, manufacture and installation.
		Water that is obtained by the reverse osmosis has better parameters and can be used as distilled water for technical and laboratory settings.
	catalog.czechtrade.us /medicine-health-and-environment/water-treatment (217 words)

	Water Technology - Williamette Water Treatment Plant
		Water is extracted from the Willamette River through an intake structure placed in mid-flow, above the river bottom and below the surface, to exclude both silt and floating material.
		This ozone is bubbled through the water during the treatment process, before being converted back to oxygen gas and released to the atmosphere.
		The fully treated water flows into an underground storage tank, where a small amount of chlorine is added to prevent bacterial contamination as the water is pumped through the distribution system pipes.
	www.water-technology.net /projects/williamette (1096 words)

	Water Treatment Plants
		Water treatment plants are those facilities that treat water, ground water or surface water, and produce potable water for public consumption or provide primary treatment and produce "industrial water." A wastewater discharge permit is typically required when the treatment of the raw water results in a discharge of wastewater (e.g., backwash) to surface water.
		Water treatment works that are a part of a larger facility such as a pulp and paper mill are covered under the NPDES permit issued to the facility as a whole and are not eligible for coverage under this general permit.
		Water treatment filtration plants are appropriate for the general permit approach because they are very similar in treatment processes and the characteristics of their wastewater discharge.
	www.ecy.wa.gov /programs/wq/wtp (891 words)

	Lesson 6: Water Treatment
		Water must be collected and transported from the source (a well, reservoir, river, etc.) to the consumer.
		Then water in the flash mixer and in the sedimentation basin are tested for pH level to ensure that the pH of the water is appropriate before and during sedimentation.
		Water from the filters collects in the clear well, where chlorine and other chemicals are added to the water.
	water.me.vccs.edu /courses/ENV110/Lesson6_print.htm (3091 words)

	Water Technology - Kamloops Water Treatment Centre - Embrane Process
		The final part of the city's comprehensive water supply improvement scheme - a $2 million programme to flush out the accumulated sediment in 350 miles (560km) of water mains - is scheduled for completion by the end of 2008.
		Until the construction of the new plant, water treatment consisted of a 3mm screen at the intake, followed by chlorine dosing prior to distribution.
		The Kamloops plant is the largest operating facility in North America to use membrane treatment, with a treatment capacity of 160,000m³/day and the installed hydraulic capacity to expand to 200,000m³/day.
	www.water-technology.net /projects/kamloops (1121 words)

	Residential Water Treatment
		Point-of-use treatment is generally used because the cost of treating the whole house would be too expensive and may not even be desirable for all uses of the water.
		Water with a high iron or manganese content is not considered a health problem, but it can be very objectionable in taste, odor or appearance, when iron concentrations are greater than 0.3 milligrams per liter or manganese concentrations are greater than 0.05 milligrams per liter.
		If the raw water has a high level of soluble organic material, is highly colored or you are planning to use a continuous chlorination system to disinfect the water or precipitate high concentrations of iron and manganese, an activated carbon (AC1) filter may be necessary.
	wyagric.state.wy.us /aslab/Resid-WT.htm (4730 words)

	Calgon Carbon Corporation: Water Treatment
		This water may be contaminated by organic compounds from previous occurrences that prevent its discharge to site effluent, surface waters or other facilities.
		Waters are often collected by industrial or other sites in lagoons, ponds, pits or large storage tanks for either long-term storage or holding prior to discharge.
		Treatment goals may be mandated by permit or regulation, or may be determined by water quality goals for reuse or recycling.
	www.calgoncarbon.com /industry/water.html (1062 words)

	NSF Consumer Information: Home Water Treatment Devices
		If you have identified a specific contaminant whose presence in your water is causing you concern, you can use the drinking water treatment units online product database to try to locate products that have been certified to reduce that specific contaminant.
		Water softening devices covered by Standard 44 use a cation exchange resin, regenerated with sodium chloride or potassium chloride, to reduce the amount of hardness (calcium, magnesium) in the water.
		In warm weather climates, the water meter may be in the garage or outside of the house.) A water softener is an example of a POE system.
	www.nsf.org /consumer/drinking_water/dw_treatment.asp?program=WaterTre (1386 words)

	Water Treatment
		The Water Treatment Division is responsible for raw water supply, treatment, and pumping to the distribution system.
		Raw water from the river is pumped to the plant to eliminate the intake of salty water during tidal changes.
		The plant operation is a combination of conventional treatment and upflow clarification with ozonation as the primary disinfection method followed by filtration and chlorine disinfection, fluoridation, corrosion control, and pH adjustment.
	www.wilmingtonnc.gov /watertreatment/tabid/225/Default.aspx (175 words)

	Water Purification
		Water can play a major role in the transmission of enteric infections, and virtually all of the agents that cause travellers' diarrhea may be present in contaminated water.
		...for foreign travel and for surface waters with heavy levels of fecal or sewage contamination, filters should not be used as the sole means of disinfection.
		Boiling water requires heat, which may be from a kerosene stove or dried yak dung, but is often in the form of a wood fire.
	www.high-altitude-medicine.com /water.html (1472 words)

	City of Wilsonville: Willamette River Water Treatment Plant (Site not responding. Last check: )
		Within Wilsonville, demand for water varies seasonally from a low of approximately 2 mgd in the winter to nearly 6 mgd in the peak of the summer.
		As a further margin of safety, enhanced methods of treatment were tested and incorporated into the design of the multi-barrier system used at Wilsonville's water treatment plant.
		The resulting water supplied from this facility is even purer than required by current drinking water standards (as well as proposed future drinking water standards).
	www.ci.wilsonville.or.us /departments/pw/water/wrwtp.htm (609 words)

	Water Treatment
		After primary treatment in which the majority of solids are settled out of the water column, these solids are diverted into an activated sludge reactor while the overlaying water is sent to an aerobic treatment system before discharge.
		In the aerobic treatment system, oxygen is supplied to the water by aeration, incorporating either surface aerators or diffusers which utilize a mechanical process requiring energy input, the amount of which is dependent upon the BOD (Biological Oxygen Demand) or COD (Chemical Oxygen Demand).
		Greater efficiency of treatment and use for a wide variety of agricultural wastes can be expected when the types of microorganisms responsible for treatment are known and their optimum environmental conditions have been established.
	www.affs.org /html/water_treatment.html (4921 words)

	Water Treatment Process
		Before arriving at your tap, raw water is treated at the Hanahan Water Treatment Plant to eliminate the presence of harmful bacteria and unpleasant coloration, taste, and odor.
		After the injection of pretreatment chemicals, the water is rapidly mixed with aluminum sulfate (alum) to evenly distribute the chemicals.
		From the flocculation basins, the water flows into sedimentation basins, where the floc settles to the bottom and the resulting residuals are removed.
	www.charlestonwater.com /water_trt_process.htm (498 words)

	Water Treatments
		If a fast flow of water goes through a tiny chunk of carbon, about all you'll remove is a small portion of the chlorine and such and nothing else to speak of.
		Very little water then actually comes in intimate contact with the charcoal (which is what the whole thing is supposed to be about) and the result is ineffective filtering.
		Water for drinking and cooking (city or tank) is run to an under-the-counter composite filter.
	www.phrannie.org /water.html (5258 words)

	Wastewater-treatment plant visit, USGS Water Science for Schools
		One of the first steps that a water treatment facility can do is to just shake up the sewage and expose it to air.
		Some of the water is removed in a step called thickening and then the sludge is processed in large tanks called digesters.
		As sludge is settling to the bottom of the sedimentation tanks, lighter materials are floating to the surface.
	ga.water.usgs.gov /edu/wwvisit.html (632 words)

	Catalytic water treatment pseudoscience
		During the 1990s, a number of water treatment systems based on the purported catalytic properties of certain alloys of "precious and semi-precious metals" appeared on the market.
		The surface tension of pure water is due to attractions between water molecules ("hydrogen bonding") which is also the cause of water's anomalously high boiling point; in its absence, water would be a gas at room temperature, so any claim that surface tension is "eliminated" is clearly nonsense.
		"The turbulence of water flowing through this non-ferrous core element strips away adhesive compounds clinging to the minerals and causes the molecular structure of the water to be rearranged, while natural minerals are retained.
	www.chem1.com /CQ/catscams.html (2479 words)

	Public Works - Water Treatment
		Water is provided for residents from South Boulder Creek and the Northern Colorado Water Conservation District.
		If you would like more information about the water treatment process or would like to arrange a tour of the facilities, please contact Sid Copeland at 303.335.4792.
		On the Water Environment Federation's homepage under Education and Outreach will give you information on the treating of wastewater and protections in place to assure stream and river water quality.
	www.ci.louisville.co.us /PublicWorks/watertreat.htm (275 words)

	Water Treatment (Site not responding. Last check: )
		The HEPP Electro-Hydraulic Discharge (EHD) is an extremely cost-effective and environmentally sound water treatment method to disinfect, remove organic materials, and precipitate minerals without the use of chemicals.
		The basic concepts for this pulsed power water treatment stem from the useful effects that occur when a high-energy plasma arc is discharged between electrodes that are sub-merged in a liquid.
		As this water proceeds through the clarifier, virtually all particulate matter and manufactured insoluble salts are removed from the water stream.
	www.henderson.us /~dynawaveinc/water_treatment.htm (1504 words)

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