【摘要】 针对好氧颗粒污泥反应器稳定运行过程中出现的泡沫堆积问题,探讨其产生的主要影响因素,并提出了相应的控制措施。结果表明:长期的高污泥负荷和温度的突然降低所引起的非丝状菌性膨胀是导致生物泡沫产生的主要原因。在污泥负荷>0.50 kgCOD/(kgMLSS.d)的情况下,污泥沉降性能较差,反应器内开始出现生物泡沫,反应器顶端堆积着大量色泽鲜白的泡沫并夹杂部分颗粒污泥,导致出水浑浊,对COD的去除率由原来的97%下降至90%左右。通过适当降低进水有机负荷,保持系统污泥负荷在0.45 kgCOD/(kgMLSS.d)以下时,泡沫逐渐消失,出水水质趋于稳定。更多还原

【Abstract】 The main factors for foam formation in the stable operation of aerobic granular sludge reactor were discussed,and its control measures were proposed.The results indicated that non-filamentous sludge bulking caused by long-term high sludge loading and sudden drop in temperature was the main cause of the biological foam formation.When the sludge loading was more than 0.50 kgCOD/(kgMLSS·d),sludge settleability was poor,and plenty of fresh white foam with part of the granular sludge piled up at the top of reactor,causing a turbid effluent.COD removal rate was reduced from 97% to 90%.When the sludge loading was kept below 0.45 kgCOD/(kgMLSS·d),the foam gradually disappeared and the effluent quality became stable.更多还原