A method for pretreatment of constructed wetland sewage for small town sewage treatment
A sewage pretreatment and sewage treatment technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of decreased treatment efficiency of the constructed wetland system, impact on the stable operation of the treatment system, Water quality fluctuations and other problems, to shorten the commissioning time, save construction costs, reduce energy consumption
Active Publication Date: 2018-03-16
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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A method for pretreatment of constructed wetland sewage for sewage treatment in small towns, aimed at overcoming the large fluctuations in water quality in small town sewage treatment systems in the prior art, which have a large impact on the stable operation of the treatment system, and the artificial wetland system In the shortcomings of the obvious decline in treatment efficiency in winter in the north, a method is provided. The specific steps are: A sewage enters the grid tank for interception treatment; B enters the biological selection area; C enters the biological reaction area, and the activated sludge degrades the organic matter in the domestic sewage , nitrogen, phosphorus and other pollutants, the aeration system automatically controls the dissolved oxygen concentration in different areas of the biological reaction zone; D enters the coagulation reaction zone, and flocculant is added for coagulation reaction; E enters the sedimentation zone, and the sludge part is deposited Return to the biological selection area; F, the remaining sludge enters the sludge concentration area; G, the sewage treated in step E enters the constructed wetland. The invention improves the impact resistance of the system and is suitable for use in environments where the sewage water quality of small towns fluctuates greatly.
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