Biomass and microbial activity in a biofilter during backwashing  

作　　者：白宇 张杰 李一凡 郜玉楠 李泳 

机构地区：[1]Beijing Drainage Group Limited Company, Beijing 100061, China,School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China [2]School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China [3]School of Environmental Engineering, Nanyang Technological University, 639798, Singapore

出　　处：《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》2005年第5期427-432,共6页浙江大学学报（英文版）B辑（生物医学与生物技术）

基　　金：Project (No. 2002BA806B04) supported by the National Techno-logical Research Program of China

摘　　要：Biomass and microbial activity in backwashing processes of a biofilter for tertiary treatment were investigated. The microbial groups revealed new distribution along the biofilter depth after low flow rate backwashing for a short time. Then the start-up process was accelerated by backwashing. The biomass profile and microbial activity profile both varying with depth before and after backwashing, can be mathematically described by quadratic equations. Using the profiles, the difference of oxygen demand can be calculated to determine the airflow rate during backwashing. Combined with the difference between biofilters and rapid gravity filters, analysis of biomass and microbial activity can determine more accurately the required airflow rate during backwashing.Biomass and microbial activity in backwashing processes of a biofilter for tertiary treatment were investigated. The microbial groups revealed new distribution along the biofilter depth after low flow rate backwashing for a short time. Then the start-up process was accelerated by backwashing. The biomass profile and microbial activity profile both varying with depth before and after backwashing, can be mathematically described by quadratic equations. Using the profiles, the difference of oxygen demand can be calculated to determine the airflow rate during backwashing. Combined with the difference between biofilters and rapid gravity filters, analysis of biomass and microbial activity can determine more accurately the required airflow rate during backwashing.

关 键 词：BIOFILTER BACKWASHING BIOMASS Microbial activity Oxygen demand 

分 类 号：Q93-3[生物学—微生物学]