SIMULTANEOUS REMOVAL OF BOD AND NITROGEN WITH ANOXIC OXIC POROUS BIOMASS SUPPORT SYSTEMS

被引:11
作者
KONDO, M [1 ]
HOZO, S [1 ]
INAMORI, Y [1 ]
机构
[1] NATL INST ENVIRONM STUDIES,YATABE,IBARAKI 305,JAPAN
关键词
ONSITE WASTE-WATER TREATMENT SYSTEM (OWTS); BIOMASS SUPPORT PARTICLES (BSP); POLYURETHANE FOAM; SIMULTANEOUS REMOVAL OF BOD AND NITROGEN; DIFFUSION; ANOXIC OXIC POROUS BIOMASS SUPPORT SYSTEMS;
D O I
10.2166/wst.1992.0647
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
To protect the public water, there is a growing demand to treat domestic gray water as well as night soil using onsite wastewater treatment systems (OWTS) in Japan. Therefore, to meet this demand, we seek the potential of the technology of the system with poros biomass support particles (BSP) using large number of small, open-cell foam pads to support high concentration of biomass in an aeration tank. From an economic point of view, durability of pads is an important factor of this process. Polyurethane foam with certain physical characteristics was chosen for pads. To attain simultaneous removal of BOD and nitrogen in an aeration tank, optimum pore size and pads dimensions were chosen in terms of diffusion. To aim for steady and further removal of nitrogen with biomass both on BSP and in suspension, we applied intermittent anoxic/oxic porous biomass support systems process to a full-scale field test, operated in the manner of 1.5 hours aeration and subsequent 0.5 hours agitation. For 330 days of the experiment, less than 20 g/L nd 15 mg/L of effluent BOD and nitrogen are achieved regardless of water temperature between 13 nd 31 degrees centigrade.
引用
收藏
页码:2003 / 2006
页数:4
相关论文
共 7 条
[1]  
COOPER PF, 1984, 1984 I CHEM ENG S PR
[2]  
HUCHU Y, 1990, YOSUI TO HAISUI, V32, P17
[3]  
REIMANN H, 1984, CEBEDEAU C USE FIXED, P353
[4]   ACTIVATED-SLUDGE PROCESS COMBINED WITH BIOFILM CULTIVATION [J].
WANNER, J ;
KUCMAN, K ;
GRAU, P .
WATER RESEARCH, 1988, 22 (02) :207-215
[5]   CHARACTERISTICS OF MICROBIAL COMMUNITY RETAINED IN POROUS SUPPORT PARTICLES FOR DEGRADATION OF ORGANIC WASTE-WATER [J].
XING, X ;
HONDA, H ;
SHIRAGAMI, N ;
UNNO, H .
KAGAKU KOGAKU RONBUNSHU, 1991, 17 (03) :524-530
[6]  
YAHASHI T, 1990, 15TH BIEN C IAWPRC P, P771
[7]  
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