给水污泥提高剩余污泥消化稳定性及处理水水质

为了探究活性污泥好氧及厌氧消化过程中添加给水污泥对其的影响和效果,分析了在剩余污泥好氧、厌氧消化不同时间段添加不同投加量给水污泥混凝沉淀后的总固体(TS)、挥发性固体(VS)降解效果,以对比不同条件对剩余污泥稳定性的影响。通过化学需氧量(COD)、浊度、氨氮及总氮的变化来分析加入给水污泥混凝沉淀后剩余污泥好氧、厌氧消化出水水质的变化。结果表明:在厌氧消化第8天,投加量为3000mg/L时,剩余污泥总固体(TS)下降了34.0%,挥发性固体(VS)下降了14.6%;添加给水污泥进行混凝沉淀后,最终产物出水水质变好,氨氮浓度降低;剩余污泥脱水性得到提高。在给水污泥投加量为1000mg/L时,氨氮含量下降了50.26%。

In order to explore the influence and effect of adding water sludge in the process of aerobic and anaerobic digestion of activated sludge,the degradation effects of total solid(TS)and volatile solid(VS)after adding different amount of feed sludge in different periods of aerobic and anaerobic digestion of excess sludge were analyzed,and the effects of different conditions on the stability of excess sludge were compared.The changes of effluent quality of aerobic and anaerobic digestion of excess sludge after coagulation and sedimentation of feed sludge were analyzed through the changes of chemical oxygen demand(COD),turbidity,ammonia nitrogen and total nitrogen.The results showed that on the 8th day of anaerobic digestion,when the dosage was 3000mg/L,the total solid(TS)of excess sludge decreased by 34.0%,and the volatile solid(VS)decreased by 14.6%.After adding water sludge for coagulation and sedimentation,the effluent quality of the final product became better,the concentration of ammonia nitrogen decreased,and the dewatering of excess sludge was improved.When the dosage of feed sludge was 1000mg/L,the content of ammonia nitrogen decreased by 50.26%.