| 不同方式预处理污泥对微生物燃料电池的影响 |
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| 引用本文： | 操家顺,贺含悦,李超,周仕华,罗景阳,许明.不同方式预处理污泥对微生物燃料电池的影响[J].环境科学研究,2018,31(8):1389-1398. |
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| 作者姓名： | 操家顺 贺含悦 李超 周仕华 罗景阳 许明 |
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| 作者单位： | 1.河海大学, 浅水湖泊综合治理与资源开发教育部重点试验室, 江苏 南京 210098 |
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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（No.2012ZX07101-003）；中央高校基本科研业务费专项资金（No.2015B21914） |
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| 摘 要： | 为了探究不同预处理方式污泥对MFC（microbial fuel cell，微生物燃料电池）的影响，采用双室MFC反应器构型，以不同预处理方式的污泥作为MFC的底物基质，包括热处理污泥、废碱渣预处理污泥、未处理污泥，并设置静态试验组污泥（开路试验），考察MFC的产电性能（电压、电功率密度）、pH、CODCr、总悬浮物（TSS）、挥发性悬浮物（VSS）、EPS（胞外聚合物）以及三维荧光等参数的变化规律.结果表明:①在所设外电阻条件下（1 000 Ω），MFC的最大启动电压可达0.3 V；②废碱渣预处理污泥的最大功率密度可达70.1 mW/m2，热处理污泥的最大功率密度可达60.1 mW/m2，预处理后污泥的性能优于未处理污泥；③热处理污泥、废碱渣预处理污泥、未处理污泥以及静态试验组污泥的pH总体呈下降的趋势，废碱渣预处理污泥及热处理污泥总悬浮物和挥发性悬浮物的去除率均高于未处理污泥，且CODCr有类似的变化规律.在此基础上，进一步分析污泥EPS的组成成分以及三维荧光光谱图的特性发现，污泥EPS中蛋白质质量浓度最高，并且腐殖酸能够在一定程度上辅助胞外电子基团的转移，三维荧光光谱图也证实了不同预处理方式污泥随厌氧消化过程的变化规律.研究显示，将废碱渣预处理的污泥作为MFC的底物，不仅降低了资源能耗而且提高了MFC的产电性能，实现了综合绿色发展.
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| 关 键 词： | MFC 污泥 预处理方式 热处理 碱渣处理 |
| 收稿时间： | 2017/12/8 0:00:00 |
| 修稿时间： | 2018/4/16 0:00:00 |
Effects of Different Pretreatments on Sludge in Microbial Fuel Cell |
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| CAO Jiashun,HE Hanyue,LI Chao,ZHOU Shihu,LUO Jingyang and XU Ming.Effects of Different Pretreatments on Sludge in Microbial Fuel Cell[J].Research of Environmental Sciences,2018,31(8):1389-1398. |
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| Authors: | CAO Jiashun HE Hanyue LI Chao ZHOU Shihu LUO Jingyang and XU Ming |
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| Affiliation: | 1.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China2.College of Environment, Hohai University, Nanjing 210098, China |
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| Abstract: | A two-chamber microbial fuel cell (MFC) reactor configuration was adopted to study the effect of different pretreatment methods on MFC. Different kinds of pretreated sludge were used as substrate for MFC, including thermal pretreated sludge, alkali residue pretreated sludge, untreated sludge, and control group (open circuit test). The effects of electrical generation performance (voltage and power density), pH, CODCr, the total suspended solids (TSS), volatile suspended solids (VSS), extracellular polymer substances (EPS) and three-dimensional fluorescence on MFC were investigated. The results showed that:(1) Under the condition of external resistance (1000 Ω), the maximum starting voltage of MFC could reach up to 0.3 V. (2) The maximum power density of alkali residue pretreated sludge and thermal pretreated sludge could reach up to 70.1 and 60.1 mW/m2, respectively. Moreover, the performances of pretreated sludge were better than untreated sludge. (3) The pH of thermal pretreated sludge, alkali residue pretreated sludge, untreated sludge, and control group declined gradually. In addition, the removal rates of the total suspended solids and volatile suspended solids of alkali residue pretreated sludge and thermal pretreated sludge were higher than those of untreated sludge, and CODCr had a similar change tendency. On this basis, the components of EPS and the characteristic of three-dimensional fluorescence spectrum were further studied. It was found that the protein in EPS of sludge was higher than other contents and the humic acid could facilite to transfer extracellular electrons to some extent. What is more, the three-dimensional fluorescence spectrum also confirmed the variations of different kinds of pretreated sludge during anaerobic digestion processes. Study has indicated that using the sludge pretreated by alkali residue as substrate to feed MFC could reduce energy consumption and enhance electrical generation performance of MFC, which realizing the requirement of comprehensive and green development. |
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| Keywords: | MFC sludge pretreatment method thermal treatment alkali residue treatment |
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