Research on application of efficient embedded aerobic granular sludge in pesticide wastewater treatment
In order to efficiently treat toxic and harmful pesticide wastewater,the treatment effect of actual pesticide wastewater treatment by embedded aerobic granular sludge was studied,the performance of embedded aerobic granular sludge,municipal aerobic sludge,and mixture of the above two kinds of sludge,on actual pesti-cide wastewater treatment,was compared.The results showed that,in actual pesticide wastewater treatment,the nitrification rate and COD degradation rate were 0.67 mg[N]/(g[SS]·h)and 3.54 mg[COD]/(g[SS]·h)re-spectively,the average nitrification rate and COD degradation rate of mixed sludge were 5.0 mg[N]/(g[embed-ded granule]·h)and 49.05 mg[COD]/(g[embedded granule]·h)respectively.The average COD degradation rate by embedded aerobic granular sludge was 91.14 mg[COD]/(g[embedded granule]·h),which showed that the embedded aerobic granular had better nitrification performance with average nitrification rate of 18.8 mg[N]/(g[SS]·h).The embedded aerobic granular sludge showed strong impact load resistance capacity,indicating that the addition of aerobic granular sludge significantly improved the degradation efficiency of ammonia nitrogen in pesticide wastewater.
embedded aerobic granular sludgemunicipal aerobic sludgenitrification effectpesticide wastewateractivated sludge process
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