单室无膜微生物电解池处理厨余垃圾的效能
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摘要
为实现固体污染物的高效处理与能量回收,以厨余垃圾为底物,构建单室无膜微生物电解池(MEC),考察不同外加电压对系统处理厨余垃圾效能的影响。结果表明,在外加电压0～1.4 V范围内,MEC系统累积甲烷产率和TS去除率随电压的升高而升高,最大值分别为271±23 mL/g和44.3%±2.6%,较传统厌氧消化(即0 V电压组)分别提高了66.3%和43.8%。更高的外加电压(2.0 V)则对厌氧微生物代谢活性产生抑制作用,导致系统运行性能大幅度下降。在适合的外加电压范围内,MEC能够有效提高对厨余垃圾的处理效果。
This paper seeks to achieve the high-efficient treatment and energy recovery of high-solid pollutants. The study is focused on investigating the influence of different applied voltages on operation performance by constructing the single-chamber membrane-free microbial electrolysis cell(MEC) using food waste as substrate. The results indicate that with applied voltage range from 0 to 1.4 V, MEC system sees the cumulative methane yield and TS removal rate increasing with the increase of applied voltage, showing the maximum values of 271±23 mL/g and 44.3±2.6% respectively, a 66.3% and 43.8% increase over traditional anaerobic digestion(i.e.0 V voltage group). However, higher applied voltage of 2.0 V could inhibit the activities of anaerobic microorganisms, with a consequent significant decrease in system running performance. The desirable applied voltages could give MEC an effective improvement in the treatment efficiency of food waste.
This paper seeks to achieve the high-efficient treatment and energy recovery of high-solid pollutants. The study is focused on investigating the influence of different applied voltages on operation performance by constructing the single-chamber membrane-free microbial electrolysis cell(MEC) using food waste as substrate. The results indicate that with applied voltage range from 0 to 1.4 V, MEC system sees the cumulative methane yield and TS removal rate increasing with the increase of applied voltage, showing the maximum values of 271±23 mL/g and 44.3±2.6% respectively, a 66.3% and 43.8% increase over traditional anaerobic digestion(i.e.0 V voltage group). However, higher applied voltage of 2.0 V could inhibit the activities of anaerobic microorganisms, with a consequent significant decrease in system running performance. The desirable applied voltages could give MEC an effective improvement in the treatment efficiency of food waste.
引文
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[2] 石宪奎,王磊,胡超,等.不同有机负荷下餐厨垃圾厌氧消化的甲烷产率[J].黑龙江科技学院学报,2014,24(2):111-113.
[3] 孔峰,戴雅,刘阳,等.电化学预处理对后续厌氧消化工艺的作用研究[J].水处理技术,2017,43(2):119-123.
[4] Haglovist A.Batchwise mesophilic anaerobic co-digestion of secondary sludge from pulp and paper industry and municipal sewage sludge[J].Waste Management,2013,33:820-824.
[5] 鲁正伟,伍永钢,杨周生.基于微生物电解池的废水生物处理技术研究进展[J].工业水处理,2016,36(6):1-6.
[6] Zhao Z S,Zhang Y B,Quan X,et al.Evaluation on direct interspecies electron transfer in anaerobic sludge digestion of microbial electrolysis cell[J].Bioresource Technology,2016,200:235-244.
[7] 陈睿.MEC用于剩余污泥产氢产甲烷效能及微生物群落结构解析[D].哈尔滨:哈尔滨工业大学,2015.
[8] 王志鹏,陈蕾.微生物电解池强化厌氧发酵的研究进展[J].应用化工,2018,45(11):2490-2493.
[9] Hou Y P,Zhang R D,Yu Z B,et al.Accelerated azo dye degradation and concurrent hydrogen production in the single-chamber photocatalytic microbial electrolysis cell[J].Bioresource Technology,2017,224:63-68.
[10] 国家环境保护总局.水与废水检测分析方法[M].第四版.北京:中国环境科学出版社,2002.
[11] Xiao B Y,Chen X,Han Y P,et al.Bioelectrochemical enhancement of the anaerobic digestion of thermal-alkaline pretreated sludge in microbial electrolysis cells[J].Renewable Energy,2018,115(4):1177-1183.
[12] Wang Z J,Zhang B G,Borthwick A G L,et al.Utilization of single-chamber microbial fuel cells as renewable power sources for electrochemical degradation of nitrogen-containing organic compounds [J].Chemical Engineering Journal,2015,280:99-105.
[13] Ding A Q,Yang Y,Sun G D,et al.Impact of applied voltage on methane generation and microbial activities in an anaerobic microbial electrolysis cell(MEC)[J].Chemical Engineering Journal,2016,283:260-265.
[14] 周友新,王晓玭,康晓荣,等.镍对餐厨垃圾厌氧消化中挥发酸降解的影响[J].中国给水排水,2018,15(5):101-104.
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