| 温度对城市污水厂尾水反硝化MBBR深度脱氮的影响 |
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| 引用本文： | 刘凯,王海燕,马名杰,张传祥,苑泉,杭前宇,李春梅.温度对城市污水厂尾水反硝化MBBR深度脱氮的影响[J].环境科学研究,2016,29(6):877-886. |
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| 作者姓名： | 刘凯 王海燕 马名杰 张传祥 苑泉 杭前宇 李春梅 |
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| 作者单位： | 1.河南理工大学材料科学与工程学院, 河南 焦作 454150 ;中国环境科学研究院, 环境基准与风险评估国家重点研究室, 北京 100012 ;中国环境科学研究院水污染控制技术研究中心, 北京 100012 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项(2014ZX07216-001) |
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| 摘 要： | 为解决城市污水厂尾水再生利用时ρ(TN)高的问题,采用反硝化MBBR(移动床生物膜反应器)对城市污水厂尾水进行反硝化脱氮,并重点研究不同温度下分别以聚乙烯和聚丙烯为填料的反硝化MBBR的运行效果. 结果表明:在HRT(水力停留时间)为12 h、温度分别为13、19、25和30 ℃时,NO3--N去除率和反硝化能力变化不大,聚乙烯和聚丙烯反硝化MBBR的NO3--N去除率分别为80.1%～85.0%和78.2%～84.0%,二者的反硝化能力分别为6.7～7.1和6.5～7.0 mg/(L·h)；较长的HRT弥补了低温时反硝化速率低的不足；随温度增加,生物量逐渐增加,但CODCr和DOM(溶解性有机物)的去除率变化不明显. 三维荧光图谱表明,出水中主要的DOM(溶解性有机质)为类色氨酸和类富里酸,聚乙烯和聚丙烯反硝化MBBR对DOM总荧光强度的去除率分别为47.6%～52.5%和24.1%～35.8%. 填料上的微生物以杆菌、丝状菌和球菌为主. 综合考虑脱氮效能和有机物污染物去除效能,聚乙烯和聚丙烯反硝化MBBR深度脱氮的最佳温度均为25 ℃.
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| 关 键 词： | 温度 反硝化移动床生物膜反应器 聚乙烯和聚丙烯填料 污水厂尾水 |
| 收稿时间： | 2016/1/14 0:00:00 |
| 修稿时间： | 2016/2/25 0:00:00 |
Influence of Temperature on Nitrogen Removal from Wastewater Treatment Plant Effluent by Denitrification MBBR |
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| LIU Kai,WANG Haiyan,MA Mingjie,ZHANG Chuanxiang,YUAN Quan,HANG Qianyu and LI Chunmei.Influence of Temperature on Nitrogen Removal from Wastewater Treatment Plant Effluent by Denitrification MBBR[J].Research of Environmental Sciences,2016,29(6):877-886. |
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| Authors: | LIU Kai WANG Haiyan MA Mingjie ZHANG Chuanxiang YUAN Quan HANG Qianyu and LI Chunmei |
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| Affiliation: | School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454150, China ;State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center for Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center for Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454150, China,School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454150, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center for Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center for Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China and State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center for Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;College of Earth Enrironmental Sciences, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | High total nitrogen content is an urgent issue for the reuse of Wastewater Treatment Plant (WWTP) effluent. A Moving Bed Biofilm Reactor (MBBR) was selected for the denitrification of WWTP effluent, and the influence of temperature on the performance of denitrification MBBRs filled with polyethylene (PE) or polypropylene (PP) carriers was intensively studied. Under 12h hydraulic retention time (HRT), 13,9, 25 and 30 ℃ operation conditions, NO3--N removal and denitrification capacity were slightly influenced by variation of temperature, and NO3--N removal of PE and PP denitrification MBBR were 80.1%-85.0% and 78.2%-84.0%. The denitrification rates were 6.7-7.1 and 6.5-7.0 mg/(L·h) accordingly, which might have resulted from the compensation of long HRT for the denitrification deficiency at low temperature. The biomass increased with the temperature increase, however, and the removal rate of carbon oxygen demand (CODCr) and dissolved organic matter (DOM) did not change obviously. Three-dimensional fluorescence spectra showed that the tryptophan-like and fulvic acid were the main kinds of DOM, and the total removal of DOM fluorescence intensity was about 47.6%-52.5% and 24.1%-35.8% for PE MBBRs and PP MBBRs, respectively. SEM micrographs showed that cocci, bacilliand filamentous microorganisms were predominant on the carriers biofilm. Considering the nitrogen and organic removal as a whole, 25 ℃ is recommended as the optimum temperature for nitrogen removal from WWTP effluent by denitrification MBBRs. |
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| Keywords: | temperature denitrification MBBR polyethylene (PE) or polypropylene (PP) carriers WWTP effluent |
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