摘要
针对现有固定床生物膜工艺的不足，开发了以悬浮床生物膜过滤工艺为主体的组合处理工艺。首次提出了预充氧生物粗滤的概念，并采用预充氧生物粗滤／多级生物膜组合工艺处理生活污水，考察了其运行特性。结果表明：用预充氧生物粗滤技术作为预处理工艺，可大幅削减有机物及SS，减轻了后续生物膜工艺的负荷，当HRT为0．8h时，其对COD的去除率为35．2％～61．3％，对SS的去除率高达85％～93％。当系统的总HRT为3h、进水COD为148～647mg／L时，系统出水COD保持在18～50mg／L，平均为31．3mg／L，表现出良好的抗冲击负荷能力；当氨氮负荷〈0．85kg／（m^3·d）时，系统出水氨氮〈2mg／L。相对于传统的固定床生物膜工艺，该组合工艺的水头损失较小，且具有高效的除碳、截留SS及硝化性能。
In order to overcome disadvantage of the current fixed bed biofilm process, a combined treatment process using suspended bed biofilm filtration process as principal part was developed. The concept of pre-aerated biological coarse filtration was put forward, and the operation characteristics of the combined process of pre-aerated biological coarse filtration and multi-stage biofilm for treatment of domestic sewage were investigated. The results show that using pre-aerated biological coarse filtration technology as pretreatment process can considerably remove organic pollutants and SS, which alleviates the load of subsequent biofilm process. When HRT is 0.8 h, the removal rates of COD and SS are 35.2% to 61.3% and 85% to 93% , respectively. When HRT is 3 h and the influent COD is 148 to 647 mg/L, the effluent COD maintains at 18 to 50 mg/L, with average of 31.3 mg/L. The process has better resistance to shock loading. When ammonia nitrogen loading is less than 0.85 kg/（ m^3 · d） , the effluent ammonia nitrogen is less than 2 mg/L. Compared to the conventional fixed bed biofilm process, the combined process has characteristics of lower filtration water head loss, effective carbon removal, SS removal and nitrification.
出处
《中国给水排水》
CAS
CSCD
北大核心
2008年第13期9-13,共5页
China Water & Wastewater
关键词
生活污水
分散式处理
预充氧
生物粗滤
多级生物膜
硝化
domestic sewage
decentralized treatment
pre-aeration
biological coarse filtration
multi-stage biofilm
nitrification
