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首页> 外文期刊>Applied Microbiology and Biotechnology >Performance evaluation and microbial community analysis of the function and fate of ammonia in a sulfate-reducing EGSB reactor
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Performance evaluation and microbial community analysis of the function and fate of ammonia in a sulfate-reducing EGSB reactor

机译：硫酸盐减少EGSB反应器氨氨函数和命运的性能评价与微生物群落分析

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摘要

Ammonia is widely distributed in sulfate-reducing bioreactor dealing with sulfate wastewater, which shows potential effect on the metabolic pathway of sulfate and ammonia. This study investigates the sulfate-reducing efficiency and microbial community composition in the sulfate-reducing EGSB reactor with the increasing ammonia loading. Results indicated that, compared with low ammonia loading (166-666 mg/L), the sulfate and organic matter removal efficiencies were improved gradually with the appropriate ammonia loading (1000-2000 mg/L), which increased from 63.58 +/- 3.81 to 71.08 +/- 1.36% and from 66.24 +/- 1.32 to 81.88 +/- 1.83%, respectively. Meanwhile, with the appropriate ratio of ammonia and sulfate (1.5-3.0) and hydraulic retention time (21 h), the sulfate-reducing anaerobic ammonia oxidation (SRAO) process was occurred efficiently, inducing the accumulation of S-0 (270 mg/L) and the simultaneous ammonia removal (70.83%) in EGSB reactor. Moreover, the key sulfate-reducing bacteria (SRB) (Desulfovibrio) and denitrification bacteria (Pseudomonas and Alcaligenes) were responsible for the sulfate and nitrogen removal in these phases, which accounted for 3.66-5.54 and 3.85-9.13%, respectively. However, as the ammonia loading higher than 3000 mg/L (phases 9 and 10), the sulfate-reducing efficiency was decreased to only 28.3 +/- 1.26% with the ammonia removal rate of 18.4 +/- 3.37% in the EGSB reactor. Meanwhile, the predominant SRB in phases 9 and 10 were Desulfomicrobium (1.22-1.99%) and Desulfocurvus (4.0-5.46%), and the denitrification bacteria accounted for only 0.88% (phase 10), indicating the low nitrogen removal rate.
机译：氨广泛分布于减少硫酸盐废水的硫酸盐减少生物反应器中，这表明对硫酸盐和氨的代谢途径表示潜在的影响。该研究通过增加的氨负荷调查硫酸盐减少的EGSB反应器中的硫酸盐降低效率和微生物群落组成。结果表明，与低氨负荷（166-666mg / L）相比，致硫酸盐和有机物质去除效率随适当的氨负荷（1000-2000mg / L）逐渐改善，其从63.58 +/- 3.81增加71.08 +/- 1.36％，分别为66.24 +/- 1.32至81.88 +/- 1.83％。同时，具有氨和硫酸盐（1.5-3.0）和液压保留时间（21小时）的适当比例，有效地发生硫酸盐减少的厌氧氨氧化（SRAO）过程，诱导S-0的积累（270mg / L）和EGSB反应器中同时去除（70.83％）。此外，还原细菌（SRB）（Desulfoviro）和脱氮细菌（假单胞菌和阿尔卡利根）负责这些阶段的硫酸盐和氮化，其分别占3.66-5.54和3.85-9.13％。然而，随着氨负荷高于3000mg / L（阶段9和10），将硫酸盐降低效率降至仅28.3 +/- 1.26％，EGSB反应器中的氨除去率为18.4 +/- 3.37％ 。同时，阶段9和10中的主要SRB是脱硫硼（1.22-1.99％）和脱硫（4.0-5.46％），脱氮细菌占0.88％（相10），表明氮去除率低。

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  • 作者

    Wang Depeng; Liu Bo; Ding Xinchun; Sun Xinbo; Liang Zi; Sheng Shixiong; Du Lingfeng;

  • 作者单位

    Nanjing Univ Sch Environm State Key Lab Pollut Control &

    Resource Reuse 163 Xianlin Ave Nanjing 210046 Jiangsu Peoples R China;

    Nanjing Univ Sch Environm State Key Lab Pollut Control &

    Resource Reuse 163 Xianlin Ave Nanjing 210046 Jiangsu Peoples R China;

    Nanjing Univ Sch Environm State Key Lab Pollut Control &

    Resource Reuse 163 Xianlin Ave Nanjing 210046 Jiangsu Peoples R China;

    Nanjing Univ Sch Environm State Key Lab Pollut Control &

    Resource Reuse 163 Xianlin Ave Nanjing 210046 Jiangsu Peoples R China;

    Nanjing Univ Sch Environm State Key Lab Pollut Control &

    Resource Reuse 163 Xianlin Ave Nanjing 210046 Jiangsu Peoples R China;

    Nanjing Univ Sch Environm State Key Lab Pollut Control &

    Resource Reuse 163 Xianlin Ave Nanjing 210046 Jiangsu Peoples R China;

    Nanjing Univ Sch Environm State Key Lab Pollut Control &

    Resource Reuse 163 Xianlin Ave Nanjing 210046 Jiangsu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用微生物学;生物工程学（生物技术）;
  • 关键词

    Ammonia loading; Sulfate reducing; SRAO; Microbial community; Denitrification bacteria;

    机译：氨载荷;硫酸盐减少;萨拉奥;微生物群落;脱氮细菌;

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