| 污泥停留时间对餐厨垃圾与剩余污泥中温厌氧混合发酵系统的影响 |
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| 引用本文： | 袁宏林,马静,邢保山,温俊伟,韩宇乐,李倩,王晓昌. 污泥停留时间对餐厨垃圾与剩余污泥中温厌氧混合发酵系统的影响[J]. 环境科学, 2019, 40(2): 994-1002 |
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| 作者姓名： | 袁宏林 马静 邢保山 温俊伟 韩宇乐 李倩 王晓昌 |
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| 作者单位： | 西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 国家城市非传统水资源开发利用国际科技合作基地, 陕西省污水处理与资源化工程技术研究中心, 陕西省环境工程重点实验室, 西安 710055;西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 国家城市非传统水资源开发利用国际科技合作基地, 陕西省污水处理与资源化工程技术研究中心, 陕西省环境工程重点实验室, 西安 710055;西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 国家城市非传统水资源开发利用国际科技合作基地, 陕西省污水处理与资源化工程技术研究中心, 陕西省环境工程重点实验室, 西安 710055;西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 国家城市非传统水资源开发利用国际科技合作基地, 陕西省污水处理与资源化工程技术研究中心, 陕西省环境工程重点实验室, 西安 710055;西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 国家城市非传统水资源开发利用国际科技合作基地, 陕西省污水处理与资源化工程技术研究中心, 陕西省环境工程重点实验室, 西安 710055;西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 国家城市非传统水资源开发利用国际科技合作基地, 陕西省污水处理与资源化工程技术研究中心, 陕西省环境工程重点实验室, 西安 710055;西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 国家城市非传统水资源开发利用国际科技合作基地, 陕西省污水处理与资源化工程技术研究中心, 陕西省环境工程重点实验室, 西安 710055 |
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| 基金项目： | 国家自然科学基金项目（51608430）；陕西省教育厅重点实验室项目（17JS077） |
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| 摘 要： | 采用连续搅拌釜式反应器(CSTR)成功启动了餐厨垃圾与剩余污泥混合发酵平行系统,重点探究了不同污泥停留时间(SRT)缩减幅度对于餐厨垃圾和剩余污泥混合发酵系统的影响.结果表明,较大幅度地缩减SRT( 8. 3 d)提升反应器运行负荷,不利于反应器的稳定运行;随着反应器运行负荷的增加,SRT缩减幅度应逐渐降低(5～0. 9 d),能够取得餐厨垃圾和剩余污泥混合发酵系统的高负荷稳定运行.经过282 d的运行,CSTR混合发酵系统能够在SRT为9. 1 d,进料负荷(以COD计)为(12. 9±1. 5) g·(L·d)~(-1)的条件下稳定运行,相应的甲烷产量为3. 94～4. 25 L·(L·d)~(-1),甲烷产率(以COD计)为288～302 m L·g-1,p H和挥发性脂肪酸(VFA,以COD计)分别稳定在7. 80～7. 83和0. 32～0. 39 g·L-1.此外,还探究了高负荷条件下餐厨垃圾和剩余污泥混合发酵污泥特性,结果表明,餐厨垃圾和剩余污泥混合发酵系统甲烷转化途径以乙酸转化途径为主,具有较高的乙酸、丙酸、丁酸和戊酸的产甲烷活性和辅酶F420的质量摩尔浓度.
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| 关 键 词： | 厌氧混合发酵 甲烷 餐厨垃圾 剩余污泥 污泥停留时间(SRT) 稳定性 |
| 收稿时间： | 2018-08-14 |
| 修稿时间： | 2018-08-28 |
Influence of Sludge Retention Time on the Performance and Stability of Mesophilic Anaerobic Co-digestion of Food Waste with Waste Activated Sludge |
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| YUAN Hong-lin,MA Jing,XING Bao-shan,WEN Jun-wei,HAN Yu-le,LI Qian and WANG Xiao-chang. Influence of Sludge Retention Time on the Performance and Stability of Mesophilic Anaerobic Co-digestion of Food Waste with Waste Activated Sludge[J]. Chinese Journal of Environmental Science, 2019, 40(2): 994-1002 |
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| Authors: | YUAN Hong-lin MA Jing XING Bao-shan WEN Jun-wei HAN Yu-le LI Qian WANG Xiao-chang |
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| Affiliation: | Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Province, Key Laboratary of Environmental Engineering, Shaanxi Province, School of Environmental & Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China,Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Province, Key Laboratary of Environmental Engineering, Shaanxi Province, School of Environmental & Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China,Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Province, Key Laboratary of Environmental Engineering, Shaanxi Province, School of Environmental & Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China,Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Province, Key Laboratary of Environmental Engineering, Shaanxi Province, School of Environmental & Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China,Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Province, Key Laboratary of Environmental Engineering, Shaanxi Province, School of Environmental & Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China,Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Province, Key Laboratary of Environmental Engineering, Shaanxi Province, School of Environmental & Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China and Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Province, Key Laboratary of Environmental Engineering, Shaanxi Province, School of Environmental & Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China |
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| Abstract: | Two parallel digestion systems of food waste (FW) and waste-activated sludge (WAS) were successfully initiated using a continuous stirred-tank reactor (CSTR), and the effect of different reduction extents of sludge retention time (SRT) on the co-digestion of FW and WAS was investigated. SRT Reduction extents longer than 8.3 d were not conducive to the stable operation of the co-digestion system when the organic load rate (OLR) was increased. The reduction extent of SRT should be reduced gradually from 5 d to 0.9 d to achieve high load and stable operation of the co-digestion of FW and WAS. After a long-term operation (approximately 282 d), the co-digestion reached stable operation at SRT of 9.1 d and OLR (calculated by COD) of (12.9±1.5) g·(L·d)-1. The corresponding methane production, methane yield (calculated by COD), pH, and volatile fatty acid (VFA, calculated by COD) were 3.94-4.25 L·(L·d)-1, 288-302 mL·g-1, 7.80-7.83, and 0.32-0.39 g·L-1, respectively. Additionly, the sludge characteristics of the co-digestion of FW and WAS under a high loading rate were also investigated. The results showed that the primary pathway of methane conversion was through acetic acid during the co-digestion of FW and WAS. Meanwhile, higher methanogenic activity of acetic acid, propionic acid, butyric acid, valeric acid, and coenzyme F420 concentration were also measured. |
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| Keywords: | anaerobic co-digestion methane food waste waste activated sludge sludge retention time (SRT) stability |
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