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In recent years, with the accelerated process of urbanization in China, the development of small and medium-sized towns very rapidly, wastewater and sewage emissions also increased dramatically, and its weak economic strength and limit large-scale water pollution control, flocculation adsorption strengthen a process for its removal effect of pollution load, can be integrated more advantages in small and medium-sized towns. This thesis is based on the tradition of enhanced primary treatment AOA / biological contact oxidation treatment of municipal wastewater pilot study. In the six-month trial, the adsorption pool sludge loading and adsorption of water force dwell time as the orthogonal factor, three levels were selected to be tested, a total of nine conditions. The test results showed that: Q = 1 to 2m3 / d between regeneration pool DO = 2.0mg / L, the anaerobic pond DO = 0 mg / L, flocculation and adsorption pool DO = 0.2mg / L, SRT = 8d, a reflux ratio of 100 %, bio-contact oxidation pond water ratio of 5:1, adsorption pool F / M = 2.8kgCOD / (kgMLSS d) adsorption pool HRT = 1.0, AOA on TN, TP's removal were higher, respectively, 36.26%, 43.80%, total removal rates reached 45.24%, 50.68%, the treatment effect is stable and reliable. The subsequent biological contact oxidation (B section) complementary role AOA denitrification, Section B of particulate P removal. System synchronization TP and TN removal, phosphorus removal by the AOA segment the traditional phosphorus removal mechanism and the mechanism of denitrifying phosphorus removal, mainly through denitrification the AOA and B segment combined with removal of phosphorus and nitrogen removal is mainly reflected. The different adsorption pool HRT and return flow, the return sludge sludge adsorption amount of pollution, which determines the removal of nitrogen and phosphorus in a certain range memory in the peak. Certain adsorption pool HRT, with adsorption pool F / M increases, the peak shift. Reaction conditions of a low concentration of organic matter in according to the Eckhenfelder model relationship the AOA of organic matter degradation kinetics model, proven instructions, that the model can better predict the effluent COD concentration: Removal of the best conditions AOA segment regression equation y = 1.01774x 0.9536, R2 = .8003; anaerobic aerobic the traditional phosphorus removal segment regression equation was y = 1.2897-1.2583x, the correlation coefficient R2 = 0.8067, good correlation. The AOA / biological contact oxidation integrated device for municipal wastewater treatment pilot studies have shown that a comparison with the traditional strengthen the higher organic matter and suspended solids removal, denitrification better phosphorus removal.
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