For the description of the basic concepts of water introduced
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Written by: usergirl
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Date: Wed, 4 Jan 2012 |
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To achieve the finished water (domestic water, process water or waste water) water quality requirements for raw water (raw water) process.
1 processing of raw water or industrial water for a living when called to the water.
(2) processing wastewater, called effluent. The purpose of wastewater treatment for wastewater discharge (into the water or land) or re-use (see waste disposal, waste water reuse).
In the water recycling system and recycling of automatic self-cleaning filter, raw water is waste water, finished water is water, process water and wastewater treatment both to the nature. Treatment also includes processing the resulting wastewater and sludge treatment and final disposal, treatment and sometimes exhaust emissions. Water treatment methods can be summarized in three ways: The most common is through the partial or total removal of impurities in raw water to obtain the required water quality in the raw water by adding new elements to obtain the required water quality, the processing of the raw water is not involves removal of impurities or add new ingredients problems.
Impurities and contaminants, including water treatment mix of coarse material, suspended solids, colloids and solutes. Coarse material such as plants floating in the river, garbage, large aquatic organisms, waste water and large dirt and other grit. Water supply project, the coarse impurities from the water intake structures, facilities, removal, treatment is not included in the scope.
Wastewater treatment to remove coarse impurities are generally part of the water pretreatment. Suspended solids and colloids, including sediment, algae, bacteria, viruses, and the existing water treatment process and the resulting insoluble substances. Solutes are inorganic salts, organic compounds and gases. Treatment to remove impurities in the water, the main scope of the method can be roughly divided according to size of impurities. As the impurities contained in raw water and finished water can be allowed on the type and concentration of impurities in very different, the treatment process varies widely.
In terms of the domestic water, water from the high-quality raw water, finished water is only disinfected; from the original general river or lake water, first remove the turbidity caused by sediment and other impurities, and then disinfected; more polluting raw water , need to remove organic matter and other pollutants; containing iron and manganese in raw water, the need to remove iron and manganese. Domestic water quality to meet the general requirements of industrial water, industrial water, but sometimes the need for further processing, such as softening, desalination and so on.
When wastewater discharge or reuse of the water quality requirements are lower, just use methods such as screening and sedimentation to remove coarse impurities and suspended solids (often called primary treatment); When asked to remove organic matter, usually in the primary treatment used after biological treatment and disinfection; after biological treatment of wastewater, the process carried out collectively referred to tertiary treatment or advanced treatment, such as when the waste water discharged into the need to prevent eutrophication of water bodies for the removal of nitrogen and phosphorus during that belongs to tertiary treatment. When the wastewater as a water source, the product water quality requirements and the corresponding manufacturing processes with its uses. In theory, the modern water treatment technology, the system can be obtained from any poor-quality water of any quality finished water.
I studied Water Treatment for many years, manufactured sand filter. Now focused on self cleaning filter research.
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