DEVELOPMENT OF AN OFF-LINE ENRICHER-REACTOR PROCESS FOR ACTIVATED-SLUDGE DEGRADATION OF HAZARDOUS WASTES

被引:35
作者
BABCOCK, RW [1 ]
RO, KS [1 ]
HSIEH, CC [1 ]
STENSTROM, MK [1 ]
机构
[1] UNIV CALIF LOS ANGELES, DEPT CIVIL ENGN, 4173 ENGN I, LOS ANGELES, CA 90024 USA
关键词
ACTIVATED SLUDGE; BIOAUGMENTATION; BIODEGRADATION; ENRICHER-REACTORS; HAZARDOUS WASTES; 1-NAPHTHYLAMINE;
D O I
10.2175/WER.64.6.5
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The improvement in degradation of a hazardous chemical using a novel bioaugmentation scheme was studied. Bench-scale off-line batch enricher-reactors (ERs) maintaining an enrichment culture were used to bioaugment bench-scale continuous-flow activated sludge reactors treating 1-naphthylamine (1NA). In batch experiments, one-time bioaugmentation inoculations of 1, 2, 5, 10, 20, and 50% by mass of a 1NA-degrading culture (mg mixed liquor volatile suspended solids [MLVSS] of 1NA-degrading culture/mg MLVSS of indigenous culture) increased degradation rates by approximately 0, 33, 100, 100, 100, and 300% respectively over an uninoculated control. In continuous-flow experiments, separate 13.7-L reactors received daily inoculations of 1.4, 2.5,6.6,11.4, and 18.3% by mass of 1NA-degrading culture. Cumulative target compound breakthrough reduction following a 50 mg 1NA/L spike was 13, 21, 11, 35, and 41% compared to an unacclimated control and 4, 13, 1, 27, and 35% compared to an acclimated control, respectively. Similarly, the reduction in breakthrough during reacclimation to 5 mg 1NA/L over six days was 66, 73, 85, 98, and 100%, respectively. A 6% bioaugmented continuous-flow reactor significantly reduced 1NA breakthrough following a step-loading increase from 1 to 5 mg 1NA/L compared to an uninoculated control. Effective bioaugmentation was achieved with additions of biomass equivalent to 14-25% of indigenous cell production rates.
引用
收藏
页码:782 / 791
页数:10
相关论文
共 43 条
[31]  
SCOTT TS, 1962, CARCINOGENIC CHRONIC, P16
[32]  
SENTHILNATHAN PR, 1988, 43RD P IND WAST C W, P301
[33]  
SHAUL GM, 1985, 40TH P IND WAST C W, P847
[34]   TREATMENT OF HAZARDOUS SUBSTANCES IN WASTE-WATER TREATMENT PLANTS [J].
STENSTROM, MK ;
CARDINAL, L ;
LIBRA, J .
ENVIRONMENTAL PROGRESS, 1989, 8 (02) :107-112
[35]  
THIBAULT GT, 1979, 34TH P IND WAST C W, P235
[36]  
WILSON BW, 1985, CHEM ANAL MUTATIONAL
[37]   THE IMPACT OF A CHEMOSTAT DISCHARGE CONTAINING OIL DEGRADING BACTERIA ON THE BIOLOGICAL KINETICS OF A REFINERY ACTIVATED-SLUDGE PROCESS [J].
WONG, AD ;
GOLDSMITH, CD .
WATER SCIENCE AND TECHNOLOGY, 1988, 20 (11-12) :131-136
[38]  
Young C. Y., 1976, WATER POLLUT CONTROL, V13, P5
[39]  
1974, FED REGISTER, V39, P23548
[40]  
1974, CHEM ENG NEWS, V52, P12