2014 common method of wastewater treatment effluent in accordance with the so-called "Water Pollution Prevention Law" as defined in the cause of water containing pollutants arising from the manufacture, operation, development of natural resources or the working environment. The water source other than an enterprise refers to water containing pollutants, waste water front has generated a lot of detail, the following is domestic sewage and industrial wastewater treatment for further instructions: 1. Household sewage legitimate area of ??an average family uses flushing toilet flushing flows into the septic tank waste after treatment, but septic tanks constructed simple, low-processing effects, usually less than 50% for BOD5 removal, ineffective. So to solve the pollution problem of domestic sewage, which is discharged into the water only to prevent the construction of sanitary sewer system, sewage collection to the sewage treatment plant to meet emission standards to be put before the stream, it is no longer contaminated water, and solve urban environmental health problems. 1) septic tank septic tank waste pre-treatment of wastewater main method for people to make, mainly by septic tanks, septic tanks, filtration tanks and three-dimensional or planar oxidation tank, which mainly deal with the role of septic tanks for the precipitation and anaerobic effect, manure by flushing into the tank, or floating solids precipitation or by anaerobic bacteria or aerobic bacteria to be decomposed by the water tank after filtration through bulk water flows into the oxidation tank unit from the aerobic tank microbial decomposition of organic matter in sewage. Method 2) domestic sewage treatment of domestic sewage treatment now widely used, depending on the degree of processing can be divided into primary treatment, secondary treatment and tertiary treatment. Primary treatment is the role of physical sedimentation or flotation to remove large or extra virgin broken sewage solids, the sewage Most sediment or suspended solids can be removed if the chemical dosing with precipitation, the gelatinous material can be removed . Secondary treatment of sewage effluent through the mat after primary treatment, and then by activated sludge aeration tank and final sedimentation tanks or other aerobic biological treatment and pond treatment before final mat be put stream. The so-called activated sludge (Activatedsludge process) is suspended growth biological treatment by sewage treatment pond mat after the initial introduction of the aeration tank, and the suspension of aerobic microorganisms in contact with the oxidation of organic matter decomposition, after Shen then flows through the final wave pool separating sludge and treated water; part of the sludge waste separation and partly returned to the aeration tank, aeration tank to maintain a certain amount of microorganisms. Advanced process known as tertiary treatment of sewage directly by physical or chemical treatment, to obtain a good deal of water quality or the use of special equipment for biological treatment to remove the impurities are not usually removed. Three treatment generally have ion exchange, discount points plus filtration to remove ammonia, nitrogen and biological treatment, reverse osmosis, activated carbon adsorption. Century Environmental Technology Co., Ltd., Sichuan Zhongxing Contact: 18908170349 Ms. Wang, QQ2540290043 Company Address: Chengdu Vanke northbound section of the Gulf of California Ring V 803 Company base camp 028 -87682468, Fax 028 -87510231