通过实验考察了投加粉煤灰对一体式膜生物反应器中活性污泥性能及膜过滤阻力的影响.实验中将不同量的粉煤灰投加到活性污泥中,反应30 min后分别考察了粉煤灰投加量对污泥体积指数、污泥脱氢酶活性等的影响,并确定了粉煤灰最佳投加量.在膜生物反应器连续运行条件下,分别测定了混合液上清液中有机污染物浓度及膜过滤阻力.结果表明,投加粉煤灰可有效降低SVI及混合液中的EPS,活性污泥活性显著增加,膜过滤阻力增加缓慢,有效地降低了膜污染发展速率.%The influence of coal fly ash on activated sludge performance and membrane filtration resistance in the submerged membrane bioreactor has been investigated. Coal fly ash with different dosages is added to activated sludge. After reacted for 30 min, the influences of coal fly ash dosages on sludge volume index, dehydrogenase activity , etc. Are investigated, and the optimal coal fly ash dosage is confirmed. When MBR works continuously, the concentrations of organic pollutants in supernatant fluid and membrane filtration resistance are determined. The results indicates that adding coal fly ash could effectively slow down sludge volume index (SVI) and extracellular polymeric substances (EPS) in mixed liquor,and obviously promote the activated sludge activity,which contributes to membrane filtration resistance increasing slowly and membrane fouling rate decreasing effectively.
展开▼
