摘要
在A/A/O普通活性污泥工艺中引入非寡毛类微型后生动物考察其生长条件和对剩余污泥的减量效果及对系统处理效果的影响。结果表明,当进水负荷小于0.5 mg(/mg MLSS·d)时,非寡毛类微型后生动物可大量生长;当内回流比升高、外回流比降低时,更有利于虫体的繁殖。经过适时的运行工艺调整可使生化系统虫体密度和稳定性提高,污泥减量效果可达到40%以上。非寡毛类后生动物的活动与摄食作用提高了系统污泥的沉降性能,并对系统出水COD、NH3-N、TN、TP、SS没有影响。。
Non-oligochaeta metazoan was added into A/A/O activated sludge reactor to investigate its growth condition and effect of the sludge in situ reduction and influence on the treatment system. Result showed that when the influent loading rate was below 0.5 mg/（mgVSS ·d）, non-oligochaeta micro-metazoan could increase in a large quantity. When internal reflux ratio increased and external reflux ratio reduced, the worms grew better. The timely adjustment of operation process could improve the worm density and stability and excess sludge was reduced in the proportion of 40%. Existence of non-oligochaeta metazoan which is beneficial to improving sludge settleability has no influence on the removal of COD, NH3-N, TN, TP and SS.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2014年第1期120-124,共5页
Environmental Science & Technology
基金
浙江省公益技术应用研究项目(2011C23058)
浙江省环保科研计划项目(2011A01)
浙江省创新团队建设与人才培养项目(2011F20028)
关键词
非寡毛类后生动物
活性污泥法
污泥原位减量
non-oligochaeta metazoan
activated sludge process
sludge in situ reduction
