INHIBITION OF ACETATE METHANOGENESIS BY PHENOLS

被引:48
作者
WANG, YT
GABBARD, HD
PAI, PC
机构
[1] Dept. of Civ. Engrg., Univ. of Kentucky, Lexington, KY
[2] Dept. of Civ. Engrg., Univ. of Kentucky, Lexington, KY
[3] Dept. of Civ. Engrg., Univ. of Kentucky, Lexington, KY
来源
JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE | 1991年 / 117卷 / 04期
关键词
D O I
10.1061/(ASCE)0733-9372(1991)117:4(487)
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The concentration effects of phenol and nine monosubstituted phenols (catechol, resorcinol, hydroquinone, 2-chlorophenol, 3-chlorophenol, 4-chlorophenol, 2-nitrophenol, 3-nitrophenol, and 4-nitrophenol) on the methanogenic fermentation of acetate were evaluated with batch anaerobic toxicity assays. The rate of methane production decreased progressively with increasing concentration of phenolic compounds. The inhibitory effect of the substituted phenols toward the acetate-utilizing methanogens was more correlated to substituent type rather than substituent position. The inhibition was in the order of nitrophenols > chlorophenols > hydroxyphenols. Hydroxyphenols were less inhibitory than the unsubstituted phenol. Experimental data were analyzed using three common inhibition models (competitive, noncompetitive, and uncompetitive) by the Marquardt method of nonlinear regression and Statistical Analysis Systems (SAS) computer programs. The noncompetitive inhibition model was found to best fit the experimental data with inhibition constant, K(I), determined at about 1-5 mg/L for nitrophenols, 100-400 mg/L for chlorophenols, 1,000-2,000 mg/L for hydroxyphenols, and 900 mg/L for phenol.
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页码:487 / 500
页数:14
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