Completely Autotrophic Nitrogen-removal over Nitrite in Two Types of Reactors  

作　　者：郑雪松 杨虹 李道棠 王鹏 

机构地区：[1]School of Life Science and Biotechnology, Shanghai Jiaotong University, Shanghai 200240

出　　处：《Journal of Donghua University(English Edition)》2005年第4期29-32,共4页东华大学学报（英文版）

基　　金：SupportedbyNationalNaturalScienceFoundationofChina.(No.50278053).

摘　　要：Two lab-scale reactors, suspended-sludge and fluidized.bed, were conducted with the feed of ammonium-rich synthetic wastewater devoid of COD. Completely autotrophic nitrogen-removal process was fulfilled in both reactors and the maximum efficiencies of nitrogen removal were achieved, 65% in the suspended-sludge reactor and 73% in the fluidized-bed reactor respectively. Different from the steady performance of the fluldized-bed reactor, the suspended-sludge reactor came to deteriorate constantly after a period of stable operation, resulting in almost complete loss of the N-removal ability in the suspending system. Molecular methods such as PCR and FISH were employed for describing the microbial characteristics in two systems. This study suggests that a biofllm system is a suitable configuration for completely autotrophic N-removal with more feasibility and stability than a suspending system.Two lab-scale reactors, suspended-sludge and fluidized-bed, were conducted with the feed of ammonium-rich synthetic wastewater devoid of COD. Completely autotrophic nitrogen-removal process was fulfilled in both reactors and the maximum efficiencies of nitrogen removal were achieved, 65% in the suspended-sludge reactor and 73% in the fluidized-bed reactor respectively. Different from the steady performance of the fluidized-bed reactor, the suspended-sludge reactor came to deteriorate constantly after a period of stable operation, resulting in almost complete loss of the N-removal ability in the suspending system. Molecular methods such as PCR and FISH were employed for describing the microbial characteristics in two systems. This study suggests that a biofilm system is a suitable configuration for completely autotrophic N-removal with more feasibility and stability than a suspending system.

关 键 词：nitrogen-removal ammonium-rich wastewater activated sludge FISH（Fluorescent In Situ Hybridization）. 

分 类 号：X703[环境科学与工程—环境工程] X172