双循环两相生物处理工艺的除污效能研究  

Pollutants Removal Efficiency of Bi-cyclic Two-phase(BICT) Biological Process

作　　者：潘杨[1] 黄勇[1] 李勇[1] 陈长林 

机构地区：[1]苏州科技学院环境科学与工程系,江苏苏州215011 [2]苏州高新区污水处理有限公司,江苏苏州215000

出　　处：《中国给水排水》2006年第7期25-29,共5页China Water & Wastewater

基　　金："十五"国家重大科技专项(2003AA601070);江苏省高校高新技术产业发展项目(JH02-119)

摘　　要：对新型生物脱氮除磷工艺———双循环两相(B ICT)生物处理工艺进行了处理生活污水的中试研究。该工艺通过在序批式活性污泥法的基础上增设独立的生物膜反应器,实现了微生物的分相培养,为优化运行工况、提高脱氮除磷效率以及增强系统运行的稳定性和可靠性创造了条件。考察了对有机物、氮、磷的总体去除性能以及影响除污效果的因素。试验结果表明,系统去除COD的能力强而稳定,硝化液的回流比是控制脱氮效果的重要因素;在适宜的负荷和运行条件下,对TN的去除率>70%,对TP的去除率最高可达90%,出水TN和TP浓度可分别控制在15 mg/L和1.0 mg/L以下。The performance of a new biological nutrient removal process -- Bi-cyclic Two-phase （BICT） biological process was studied based on application-scale experiments with municipal sewage. The new system consists of an independent attached-growth reactor and a set of suspended-growth sequencing batch reactors, in which the different functioned microorganisms grow in separate phases—— autotrophic nitrifying bacteria in attached-growth reactor and heterotrophic organisms in suspended-growth reactors. The configuration and operation modes of the process provides a good potential for optimizing the operation conditions according to the specific requirements, especially for increasing the stability and reliability of the process. The overall performances, major operation parameters and influencing factors for COD, nitrogen and phosphorus removal in the process are discussed based on the results of extensive experiments. According to the experimental results with municipal sewage, the process has a strong and stable capability for COD removal, and the circulating flow rate of supernatant between main reactors and attached-growth reactor is a key factor for controlling the effect of nitrogen removal. Under suitable conditions, the removal rate of total nitrogen （TN） can reach over 70% and total phosphorus （TP） over 90% respectively, and the effluent concentration of TN and TP can be controlled below 15 mg/L and 1.0 mg/L respectively.

关 键 词：BICT 活性污泥 生物膜 脱氮除磷 

分 类 号：X703[环境科学与工程—环境工程]