Artificial wetland waste water pretreatment method for small-town waste water treatment
A sewage pretreatment and sewage treatment technology, which is applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the impact of the stable operation of the treatment system, the decrease of the treatment efficiency of the constructed wetland system, Water quality fluctuations and other problems, to shorten the commissioning time, save construction costs, reduce energy consumption
Active Publication Date: 2015-11-11
SHENZHEN BIYUAN ENVIRONMENTAL PROTECTION TECHNIC CO LTD
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[0004] The present invention overcomes the disadvantages in the prior art that the water quality of the sewage treatment system in small towns fluctuates greatly, which causes a great impact on the stable operation of the treatment system, and the treatment efficiency of the artificial wetland system decreases obviously in winter in the north, and provides a method for Method for pretreatment of constructed wetland sewage in small town sewage treatment
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[0024] as attached figure 1 As shown, a method for pretreatment of constructed wetland sewage in this embodiment, which is used for sewage treatment in small towns, includes steps such as biological treatment, flocculation, and precipitation. The specific steps are:
[0025] A. The sewage is intercepted and treated by the grid pool equipped with grids to intercept large floating objects and impurities in the sewage;
[0026] B. After the step A intercepts the processed sewage into the biological selection area, the biological selection area is filled with domesticated activated sludge, and the sewage is fully mixed with the activated sludge in the biological selection area;
[0027] C. The mud-water mixture processed by the step B enters the biological reaction zone, and the biological reaction zone is provided with anoxic reaction zone, anaerobic reaction zone and aerobic reaction zone, and the aeration system in the biological reaction zone passes through the device and e...
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An artificial wetland waste water pretreatment method for small-town waste water treatment aims at overcoming the defects that in the prior art, the water quality of a small-town waste water treatment system is larger in fluctuations, larger impact is caused on stable running of the treatment system, and the treatment efficiency of an artificial wetland system dramatically declines in winter in the north. The method comprises the steps that 1, waste water enters a grille pool, and interception treatment is conducted; 2, treated waste water enters a biological selection area; 3, the treated waste water enters a biological reaction area, activated sludge degrades pollutants such as organic matter, nitrogen and phosphorus which exist in the domestic waste water, and an aerating system automatically controls dissolved oxygen concentrations of different zones of the biological reaction area; 4, the treated waste water enters a coagu-flocculation reaction area, and a coagu-flocculation reaction is conducted after flocculating agents are added; 5, the treated waste water enters a settling zone, and settling sludge partially back flows to the biological selection area; 6, residual sludge enters a sludge concentration area; 7, the waste water which is treated in the fifth step enters an artificial wetland. The artificial wetland waste water pretreatment method for the small-town waste water treatment improves the anti-impact capacity of the system and is suitable for being used in the environment of small-town waste water with larger fluctuations in the water quality.
Description
technical field [0001] The invention relates to the field of artificial wetlands, in particular to a method for pretreatment of artificial wetland sewage used for sewage treatment in small towns. Background technique [0002] Constructed wetlands are artificially built and supervised and controlled grounds similar to swamps, through the triple synergy of physics, chemistry and biology in the natural ecosystem to purify sewage. Constructed wetland optimizes the fillers, microorganisms, plants and water distribution methods in the natural wetland system, and strengthens the pollutant removal efficiency of the natural wetland system. The system has the characteristics of good treatment effect, simple process, low investment and low operating cost. Especially suitable for small town sewage treatment system. [0003] Constructed wetlands, as an ecological pollution control technology, also have disadvantages such as large area, low pollution load, poor operation management and e...
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IPC IPC(8): C02F9/14
Inventor 雷志洪彭立新曹飞华林静张俊辉王永秀宋海勇李伟奇
Owner SHENZHEN BIYUAN ENVIRONMENTAL PROTECTION TECHNIC CO LTD
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