Study On The Evaluation And Control Countermeasure Of Odor Gas Treatment Technology In Municipal Wastewater Treatment

The influence of H2S,NH3 and other malodorous gases produced by municipal wastewater treatment plant on the surrounding environment has been paid more and more attention.But at present,there is still a lack of evaluation of the effectiveness of the control technology of odor gas in urban sewage treatment plant and the appropriate regulatory measurest.Therefore,it is of great practical significance to study the evaluation of the performance of the odor treatment technology,the control strategy of the whole process and the supervision system of the control technology.In this study,the evaluation index system of odor treatment technology in municipal wastewater treatment plant was studied,being constructed includes four criteria layer(environmental impact,tech-nical feasibility,economic rationality and management complexity)and 17 layer index evaluation index system,using analytic hierarchy process(AHP)to calculate the weight of each index,and the odor of existing treatment technologies were evaluated.The evaluation results show that the biological method is superior to the physical and chemical methods,and the biological method+absorption method has the highest score(7.8898,full mark is 10),the maximum weight ratio of environmental impact is the most important factor in evaluating the quality of odor treatment technology in the four criteria.This study based on the field investigation and data analysis,the key points of malodorous gas pro-duction in urban sewage treatment plant were determined,the SBR process is the grid,the grit chamber and the water aeration stage,the oxidation ditch process is the grid,the grit chamber,the aeration area and the non aeration area,the A2/O process is the grid,the grit chamber,the anaerobic pool,the anoxic tank and the oxygen tank.The whole process control strategy of odor gas is put forward from three aspects:source,process and end treatment.In this study,the urban sewage treatment plant and the environmental supervision department to build a city sewage treatment plant odor control technology supervision system.Among them,From the sewage treatment plant put forward the overall requirements,marking requirements,source control re-quirements,process control requirements,the end of the treatment system operating requirements and emergency risk management,From the aspect of environmental supervision department,this study puts forward the requirements for the supervision and management of the sewage treatment plant the emer-gency risk management and evaluation,and the emergency plan of risk management...