Start-Up Stage Analysis and Parameter Optimization Research of Multi-Stage AO-MBR Process in Low Carbon to Ammonia Ratio Domestic Sewage Treatment
The study optimized parameters of the improved multi-stage anaerobic/aerobic-membrane bioreactor process to improve sewage treatment efficiency and membrane module life.The study adjusted the inlet water flow and flow distribution ratio,and added film fillers in the aerobic zone to enhance nitrification and denitrification.Research results show that the chemical oxygen demand removal rate of the system with added fillers increased to 90.60%under 6 hours of hydraulic retention time,and the effluent concentration was 23.18 mg/L,which was better than the 86.20%of the system without fillers.In terms of ammonia nitrogen removal,the packing system achieved an efficiency of 98.55%,and the effluent concentration was 0.64 mg/L,while the efficiency of the packing-free system at 8 hours and 6 hours hydraulic retention time was 98.26%and 96.46%respectively,and the effluent concentration was higher.The research results can provide scientific basis for the development of sewage treatment technology.
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