Thiosulfate as external electron donor accelerating denitrification at low temperature condition in S-0-based autotrophic denitrification biofilter
文献类型：期刊论文
| 作者 | Zhang, Xue-Ning ; Zhu, Lin; Li, Zhuo-Ran; Sun, Yi-Lu; Qian, Zhi-Min; Li, Shuang-Yan; Cheng, Hao-Yi; Wang, Ai-Jie
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| 刊名 | ENVIRONMENTAL RESEARCH
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| 出版日期 | 2022-07 |
| 卷号 | 210期号:0页码:113009 |
| ISSN号 | 0013-9351 |
| 关键词 | AEROBIC DENITRIFICATION DRIVEN DENITRIFICATION SULFUR NITRATE REMOVAL NITRITE OXYGEN PILOT |
| 英文摘要 | This study was carried out to determine the inhibition of low temperature on the performance of S-0-based autotrophic denitrification (S-0-SAD) biofilter, and proposed to enhance the nitrate removal efficiency with thiosulfate as external electron donor. With the decline of temperature from 30 degrees C to 10 degrees C at 0.25 h of empty bed contact time (EBCT), the nitrate removal rate presented a logarithmical drop, and the effluent nitrate dramatically increased from 9.19 mg L-1 to 15.13 mg L-1. EBCT was prolonged until 0.33 h for 20 degrees C, 0.66 h for 15 degrees C and 1.5 h for 10 degrees C, respectively, to maintain the effluent nitrate below 10 mg L-1. Such excessive variation of EBCT for different temperature is undoubtedly incredible for practical engineering. Thiosulfate, as the external electron donor, was adopted to compensate the efficiency loss during temperature decrease, which significantly prompted nitrate removal rate to 0.59, 0.53 and 0.31 kg N m(-3) d(-1) at 20 degrees C, 15 degrees C and 10 degrees C conditions, respectively, even at a short EBCT of 0.25 h. It not only acted as compensatory electron donor for nitrate removal, but also promoted the contribution of elemental sulfur via accelerating the DO consumption and extended larger effective volume of S-0-layer for denitrification. Meanwhile, the significant enrichment of Sulfurimonas and Ferritrophicum provided biological evidences to the enhancement process. However, the incomplete consumption of thiosulfate was observed especially at EBCT of 0.25 h and 10 degrees C, and the thiosulfate runoff needs to be concerned in case of contaminating the effluent. Herein, approximately extending EBCT to 0.66 h and decreasing thiosulfate dosage were conducted simultaneously, thereby achieving 100% thiosulfate utilization efficiency and expected nitrate removal. This study provided a fundamental guidance to design and operate S-0-SAD biofilter in response to seasonal temperature variation for practical engineering. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47823]  |
| 专题 | 生态环境研究中心_中国科学院环境生物技术重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples R China 2.Bur Ecol & Environm Miyun, Beijing 101500, Peoples R China 3.Harbin Inst Technol Shenzhen, Sch Civil & Environm Engn, Shenzhen 518055, Peoples R China 4.Harbin Inst Technol, Sch Environm, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Xue-Ning,Zhu, Lin,Li, Zhuo-Ran,et al. Thiosulfate as external electron donor accelerating denitrification at low temperature condition in S-0-based autotrophic denitrification biofilter[J]. ENVIRONMENTAL RESEARCH,2022,210(0):113009. |
| APA | Zhang, Xue-Ning.,Zhu, Lin.,Li, Zhuo-Ran.,Sun, Yi-Lu.,Qian, Zhi-Min.,...&Wang, Ai-Jie.(2022).Thiosulfate as external electron donor accelerating denitrification at low temperature condition in S-0-based autotrophic denitrification biofilter.ENVIRONMENTAL RESEARCH,210(0),113009. |
| MLA | Zhang, Xue-Ning,et al."Thiosulfate as external electron donor accelerating denitrification at low temperature condition in S-0-based autotrophic denitrification biofilter".ENVIRONMENTAL RESEARCH 210.0(2022):113009. |
入库方式： OAI收割
来源：生态环境研究中心
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