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.
出处
《环境污染与防治》
CAS
CSCD
北大核心
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"
