GLYPHOSATE DEGRADATION BY IMMOBILIZED BACTERIA - LABORATORY STUDIES SHOWING FEASIBILITY FOR GLYPHOSATE REMOVAL FROM WASTE-WATER

被引:18
作者
HEITKAMP, MA [1 ]
ADAMS, WJ [1 ]
HALLAS, LE [1 ]
机构
[1] MONSANTO CO,MONSANTO AGR CO,ST LOUIS,MO 63167
关键词
GLYPHOSATE; DEGRADATION; IMMOBILIZED BACTERIA TECHNOLOGY;
D O I
10.1139/m92-149
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
To evaluate immobilized bacteria technology for the removal of low levels of glyphosate (N-phosphonomethylglycine) from aqueous industrial effluents, microorganisms with glyphosate-degrading activity obtained from a fill and draw enrichment reactor inoculated with activated sludge were first exposed to glyphosate production wastes containing 500-2000 mg glyphosate/L. The microorganisms were then immobilized by adsorption onto a diatomaceous earth biocarrier contained in upflow Plexiglas(R) columns. The columns were aerated, maintained at pH 7.0-8.0, incubated at 25-degrees-C, supplemented with NH4NO3 (50 mg/L), and exposed to glyphosate process wastes pumped upflow through the biocarrier. Glyphosate degradation to aminomethylphosphonic acid was initially > 96% for 21 days of operation at flows yielding hydraulic residence times (HRTs) as short as 42 min. Higher flow rate studies showed > 98 % removal of 50 mg glyphosate/L from the waste stream could be achieved at a HRT of 23 min. Glyphosate removal of > 99% at a 37-min HRT was achieved under similar conditions with a column inoculated with a pure culture of Pseudomonas sp. strain LBr, a bacterium known to have high glyphosate-degrading activity. After acid shocking (pH 2.8 for 18 h) of a column of immobilized bacteria, glyphosate-degrading activity was regained within 4 days without reinoculation. Although microbial growth and glyphosate degradation were not maintained under low organic nutrient conditions in the laboratory, the low levels of degradable carbon (45-94 mg/L) in the industrial effluent were sufficient to support prolonged glyphosate-degrading activity. The results demonstrated that immobilized bacteria technology is effective in removing low levels of glyphosate in high-volume liquid waste streams.
引用
收藏
页码:921 / 928
页数:8
相关论文
共 21 条
[1]   GLYPHOSATE-DEGRADING MICROORGANISMS FROM INDUSTRIAL ACTIVATED-SLUDGE [J].
BALTHAZOR, TM ;
HALLAS, LE .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1986, 51 (02) :432-434
[2]   PHOSPHONATE UTILIZATION BY BACTERIA [J].
COOK, AM ;
DAUGHTON, CG ;
ALEXANDER, M .
JOURNAL OF BACTERIOLOGY, 1978, 133 (01) :85-90
[3]   CHARACTERIZATION OF MICROBIAL TRAITS ASSOCIATED WITH GLYPHOSATE BIODEGRADATION IN INDUSTRIAL ACTIVATED-SLUDGE [J].
HALLAS, LE ;
HAHN, EM ;
KORNDORFER, C .
JOURNAL OF INDUSTRIAL MICROBIOLOGY, 1988, 3 (06) :377-385
[4]   GLYPHOSATE DEGRADATION BY IMMOBILIZED BACTERIA - FIELD STUDIES WITH INDUSTRIAL WASTE-WATER EFFLUENT [J].
HALLAS, LE ;
ADAMS, WJ ;
HEITKAMP, MA .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1992, 58 (04) :1215-1219
[5]   BIODEGRADATION OF PARA-NITROPHENOL IN AN AQUEOUS WASTE STREAM BY IMMOBILIZED BACTERIA [J].
HEITKAMP, MA ;
CAMEL, V ;
REUTER, TJ ;
ADAMS, WJ .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1990, 56 (10) :2967-2973
[6]   METABOLISM OF GLYPHOSATE IN PSEUDOMONAS SP STRAIN LBR [J].
JACOB, GS ;
GARBOW, JR ;
HALLAS, LE ;
KIMACK, NM ;
KISHORE, GM ;
SCHAEFER, J .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1988, 54 (12) :2953-2958
[7]  
JACOB GS, 1985, J BIOL CHEM, V260, P5899
[8]  
KISHORE GM, 1987, J BIOL CHEM, V262, P12164
[9]   STUDIES ON SOME METHANE-UTILIZING BACTERIA [J].
LEADBETTER, ER ;
FOSTER, JW .
ARCHIV FUR MIKROBIOLOGIE, 1958, 30 (01) :91-118
[10]   DEGRADATION OF THE HERBICIDE GLYPHOSATE BY MEMBERS OF THE FAMILY RHIZOBIACEAE [J].
LIU, CM ;
MCLEAN, PA ;
SOOKDEO, CC ;
CANNON, FC .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1991, 57 (06) :1799-1804