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Study on A~2/O Process with Two Suspended Carriers Treating Municipal Wastewater

Author: WuYunZuo
Tutor: TaoTao
School: Huazhong University of Science and Technology
Course: Municipal Engineering
Keywords: Wastewater treatment plant upgrading Suspended carrier A~2/O process Orthogonal experiment
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 60
Quote: 1
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Abstract


In the past dozens of years, anaerobic - anoxia aerobic (A~2/O) process is widely used in wastewater treatment plants of China. However this process exist some problems, such as the sludge age in heterotrophic bacteria and heterotrophic bacteria is different, and the denitrifying and phosphorus release have the competition of carbon source ,and the removal of phosphorus is unstable, and it’s difficult to achieve at the same time removal of nitrogen and phosphorus etc.All of this hindering the development of A~2 / O processWuhan dragon king mouth wastewater treatment plant modified type A~2 / O process, namely, the original A~2 / O process before adding a anaerobic choose pool. With the increasingly perfect urban pipeline, now already more than when dealing with water design to the amount of water. And wastewater treatment plant is now facing DiBiao transformation of pressure. This topic is in this premise, use to biological hypoxia, aerobic pool dosing suspended packing removal efficiency, increase pollutants. Research shows that:With the development of urban pipelines,some of the wastewater treatment plants in Wuhan are against the problem of over weight working.Their effluent need to reach the Level A from Level B.In this background ,we are authorize by Wuhan Water Bloc,and take the Longwang Zui wastewater treatment plants for example,we make the contrast study of two suspended carriers A~2/O process .We add suspended carriers in anoxia and aerobic plant to improve the removal efficiency of pollutants.Then it will incress the effluent level and water yield.We add K1 in 1# anoxia plant for 20%, aerobic plant for 30% and K3 in 2#,and none in 3#.The results shows that :According to the experimental data, we find the degrading dynamic equation of K3 treatmet pool is : anoxia pool S=S0exp-0.0002577XT ,aerobic pool S=S0exp-0.0001190XT

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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