BEHAVIOR OF NITRITE OXIDIZERS IN THE NITRIFICATION/DENITRIFICATION PROCESS FOR THE TREATMENT OF SIMULATED COKE-OVEN WASTEWATER
The wastewater from coke-ovens for steel industries contains high concentrations of toxic compounds such as cyanide and phenol as well as ammonia. If the treated wastewater is to be discharged to enclosed water bodies, nitrogen removal is needed in addition to the removal of toxic compounds. Yet, as nitrifiers are in general known to be sensitive to toxic compounds, the application of biological methods such as nitrification/denitrification has been thought to be difficult. Yet, there are cases where biological nitrification has been applied successfully. The authors examined the applicability of the nitrification/denitrification process for the treatment of coak-oven wastewater diluted with sea water. In the preliminary experiment, the authors observed the accumulation of nitrite instead of nitrate in the nitrification step. In an attempt to clarify the cause of partial nitriifcation, the authors operated a test plant using simulated coak-oven wastewater prepared with chemical reagents for a period of about one year. The nitrifiers population was monitored by molecular methods including fluorescence in situ hybridization (FISH), PCR-DGGE, and real time PCR.
Yuki Takasaki Hiroyasu Satoh Motoharu Onuki Takashi Mino Kimio Ito Osamu Miki
Institute of Environmental Studies,Univ.of Tokyo Advanced Technology Research Laboratories,Nippon Steel Corporation
国际会议
第六届中日水环境暨NSFC-JST重大国际合作项目成果交流会
青岛
英文
32-37
2006-10-19（万方平台首次上网日期，不代表论文的发表时间）