Reduction of produced elementary sulfur in denitrifying sulfide removal process

被引：21
作者：
Zhou, Xu [1 ]
Liu, Lihong [1 ]
Chen, Chuan [1 ]
Ren, Nanqi [1 ]
Wang, Aijie [1 ]
Lee, Duu-Jong [2 ]
机构：
[1] Harbin Inst Technol, SKLUWRE, Harbin 150090, Peoples R China
[2] Natl Taiwan Univ, Dept Chem Engn, Taipei 10617, Taiwan
来源：
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY | 2011年 / 90卷 / 03期
基金：
美国国家科学基金会;
关键词：
Denitrifying sulfide removal; Elementary sulfur; Sulfate-reducing; Hydraulic retention time; SIMULTANEOUS BIOLOGICAL REMOVAL; SP NOV; NITROGEN; CARBON; COMMUNITY; GROWTH; DGGE;
D O I：
10.1007/s00253-011-3087-8
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：
Denitrifying sulfide removal (DSR) processes simultaneously convert sulfide, nitrate, and chemical oxygen demand from industrial wastewater into elemental sulfur, dinitrogen gas, and carbon dioxide, respectively. The failure of a DSR process is signaled by high concentrations of sulfide in reactor effluent. Conventionally, DSR reactor failure is blamed for overcompetition for heterotroph to autotroph communities. This study indicates that the elementary sulfur produced by oxidizing sulfide that is a recoverable resource from sulfide-laden wastewaters can be reduced back to sulfide by sulfur-reducing Methanobacterium sp. The Methanobacterium sp. was stimulated with excess organic carbon (acetate) when nitrite was completely consumed by heterotrophic denitrifiers. Adjusting hydraulic retention time of a DSR reactor when nitrite is completely consumed provides an additional control variable for maximizing DSR performance.
引用
收藏
页码：1129 / 1136
页数：8
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