Study Of Enhanced Treatment On High Ammonia Wastewater By Suspended Filler Type SBR

Filler-type SBR process can be achieved transformation by dosing filler to traditional SBR reactor without adding structures, but with less costs, more flexible, which can effectively avoid the problem of sludge bulking, it also can be able to tolerate high loads and handling stable. The biggest advantage of the process is the presence of biofilm on the filler surface whicn can enhance TN removal efficiency, and you can change the temperature, aeration, SRT, pH and duration of each stage of the reaction to further enhance nitrogen removal and phosphorus removal.In order to strengthen the removal effect of high ammonia wastewater. Filler-type SBR process can be achieved transformation by dosing a certain amount of suspened filler to traditional SBR. As the biofilm on the filler surface increases the SBR reactor biomass, more importantly, it can accumulate the generation of longer bacteria such as nitric acid bacteria in the surface of the filler, which is primary cause to enhanced denitrification.Secondly, there is a certain thickness of the biofilm, and liquid oxygen decreased,to the internal biofilm process,so the biofilm formed inside anaerobic micro-environment for denitrification as a good environmental conditions.(1) Comparative tests determine filler2with a fast biofilm growth rate.The maximum biofilm growth speed can reach1.5mg/g·d.At last biofilm on surface can reach35.9mg/g. Rotifers and metazoan can be examined by microscopic which is similar to microbial composition in activated sludge.(2) Different influent loading was tested in stabilization period, from low to high. The compared test results showed that even in the case of high load COD, ammonia nitrogen, total nitrogen removal rate can reach94.00%,96%and72%respectively.(3)At last effluent pH was maintained at7.8; aeration time was chosen8hours in this test.DO concentration should first meet the needs of aerobic bacteria without damaging the internal anoxic micro-environment, DO was chosen about4.5mg/L;the C/N and SRT were chosen6and30days respectively.