LEACHING OF HEAVY-METALS FROM ANAEROBIC SEWAGE-SLUDGE BY SULFUR-OXIDIZING BACTERIA

被引：60

作者：

JAIN, DK ^{[1
]}

TYAGI, RD ^{[1
]}

机构：

[1] UNIV QUEBEC,INRS EAU,2700 RUE EINSTEIN,ST FOY G1V 4C7,QUEBEC,CANADA

来源：

ENZYME AND MICROBIAL TECHNOLOGY | 1992年 / 14卷 / 05期

关键词：

HEAVY METALS; ANAEROBIC SEWAGE SLUDGE; THIOBACILLUS SPECIES; SULFUR-OXIDIZING BACTERIA;

D O I：

10.1016/0141-0229(92)90006-A

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Two sulfur-oxidizing Thiobacillus species, T. thiooxidans ATCC 55127 and T. thioparus ATCC 55128, were isolated by enrichment from anaerobically digested sewage sludge. Under aerobic conditions, the mixed inoculum of the Thiobacillus species decreased pH of the anaerobic sludge containing sulfur from 7.8 to 2.0 in 40 h. The pH drop was achieved in two steps by the Thiobacillus species. In the first step, T. thioparus decreased the pH to a level which favored the sulfur-oxidizing activity of T. thioxidans. In the second step, T. thiooxidans decreased the pH below 2.0, at which Zn and Cu were completely solubilized within 40 and 60 h, respectively.

引用

页码：376 / 383

页数：8

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