蚯蚓生物反应器污泥减量与稳定效果试验研究  

Feasibility study of lombrifilter for sludge reduction and stabilization

作　　者：吴敏[1] 马小杰 杨健[1] 邢美燕[1] 

机构地区：[1]同济大学环境科学与工程学院,上海200092 [2]上海市城市建设设计研究院,上海200011

出　　处：《环境污染与防治》2007年第6期401-405,共5页Environmental Pollution & Control

基　　金：上海城市水环境质量改善技术与综合示范项目(国家高技术研究发展"863"计划专项(No.2003AA601020))子课题"厌氧水解-高负荷生物滤池和蚯蚓生态滤池组合处理工艺研究"

摘　　要：蚯蚓生物反应器以蚯蚓等微型动物和各种微生物为主形成生物降解系统。城镇污水经生物预处理后,经该反应器过滤,水质得到澄清和进一步改善,而水中含有的生物膜污泥则被滤床截留,通过蚯蚓的吸收、消化和分解转化为蚯蚓排泄物(蚓粪)。中试运行结果表明,当蚯蚓生物反应器水力负荷为5.3～6.6m3/(m2·d)时,在满足污水处理效果条件下,蚯蚓生物反应器对生物膜污泥挥发性悬浮固体(VSS)降解率为86.67%～96.20%,所产生的蚓粪VSS:SS为29.97%～31.20%,有机物降解率超过了厌氧消化与好氧消化处理污泥的效果,减量化和稳定化效果十分明显。该系统排出的蚓粪含有丰富的肥分,可用作农肥与土壤改良剂。The fesibility of using a lombrifilter for reduction and stabilization of wastewater treatment sludge was investigated. The earthworms and microorganisms living in the lombrifilter intereepted, degraded and ingested soluble organic contaminants and suspended biomass and released earthworm excrements as the final sludge. Operating at a hydraulic loading of 5.3-6.6 m^3/（m^2 · d）, the pilot scale lombrifiher significantly reduced （86.67%- 96.20% ） VSS of the biofilm reactor sludge with production of excrements ranged from 29.97% to 31.20% VSS/SS. The lombrifiltration was more cost effective than the conventional secondary clarification followed by anaerobic or aerobic digestion for sludge reduction and stabilization. The earthworm excrements were rich in manure and useful as fertilizer and/or soil Conditioner.

关 键 词：蚯蚓 微生物 蚯蚓生物反应器 生物膜污泥 污泥稳定 污泥减量 

分 类 号：X703.2[环境科学与工程—环境工程]