Enhanced performance of denitrifying sulfide removal process at high carbon to nitrogen ratios under micro-aerobic condition

被引：49

作者：

Chen, Chuan ^{[1
]}

Zhang, Ruo-Chen ^{[1
]}

Xu, Xi-Jun ^{[1
]}

Fang, Ning ^{[1
]}

Wang, Ai-Jie ^{[1
]}

Ren, Nan-Qi ^{[1
]}

Lee, Duu-Jong ^{[1
,2
,3
]}

机构：

[1] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, 73 Huanghe Rd, Harbin 150090, Heilongjiang Pr, Peoples R China

[2] Natl Taiwan Univ, Dept Chem Engn, Taipei 106, Taiwan

[3] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 106, Taiwan

来源：

BIORESOURCE TECHNOLOGY | 2017年 / 232卷

基金：

中国国家自然科学基金;

关键词：

Denitrifying sulfide removal; High C/N molar ratio; Micro-aerobic condition; SIMULTANEOUS BIOLOGICAL REMOVAL; WASTE-WATER TREATMENT; ELEMENTAL SULFUR; NITRITE ACCUMULATION; DENITRIFICATION; REACTOR; NITRATE; OXIDATION; SULFATE; WASTEWATERS;

D O I：

10.1016/j.biortech.2017.02.031

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The success of denitrifying sulfide removal (DSR) processes, which simultaneously degrade sulfide, nitrate and organic carbon in the same reactor, counts on synergetic growths of autotrophic and heterotrophic denitrifiers. Feeding wastewaters at high C/N ratio would stimulate overgrowth of heterotrophic bacteria in the DSR reactor so deteriorating the growth of autotrophic denitrifiers. The DSR tests at C/N = 1.26: 1, 2: 1 or 3: 1 and S/N = 5: 6 or 5: 8 under anaerobic (control) or micro-aerobic conditions were conducted. Anaerobic DSR process has <50% sulfide removal with no elemental sulfur transformation. Under micro-aerobic condition to remove <5% sulfide by chemical oxidation pathway, 100% sulfide removal is achieved by the DSR consortia. Continuous-flow tests under micro-aerobic condition have 70% sulfide removal and 55% elemental sulfur recovery. Trace oxygen enhances activity of sulfide-oxidizing, nitrate-reducing bacteria to accommodate properly the wastewater with high C/N ratios. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：417 / 422

页数：6

共 25 条

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