连续搅拌微生物电化学系统处理高浓度模拟废水的效能

发布时间：2018-01-15 15:32

本文关键词：连续搅拌微生物电化学系统处理高浓度模拟废水的效能　出处：《哈尔滨工业大学学报》2017年08期 　论文类型：期刊论文

【摘要】：微生物电化学系统在面向实际废水处理时,表现出产电性能下降、出水水质差等缺点.为了提高其处理中高浓度、含发酵类底物废水的性能,将连续搅拌釜式反应器与之耦合,构建一体式连续搅拌微生物电化学系统(CSMER).确定系统的最佳运行条件:以连续流方式运行,在水力停留时间为12 h,进水COD浓度为6 000 mg·L~(-1)时,系统内4个电池的最大功率密度分别达(583±9),(562±7),(533±10)和(572±6)mW·m~(-2),COD去除率为(87.1±1.1)%,甲烷产率为(1.48±0.15)L·L~(-1)·d~(-1).与对照的连续搅拌釜式反应器相比,其COD去除率及甲烷产率分别提高了61.6%及244.2%.焦磷酸测序结果表明,CSMER底端的全混流搅拌区(CMZ)以Clostridium(10.0%)、Acidaminococcus(11.7%)及Lactococcus(10.8%)等水解发酵菌群为优势细菌菌属;顶端的微生物电化学区(MEZ)以产电菌Geobacter(14.5%)占优势.CSMER中相对复杂的细菌群落结构使其同时含有丰度较高的嗜乙酸产甲烷菌科(52.2%)和嗜氢产甲烷菌科(47.1%),而底端CMZ的厌氧消化过程与顶端MEZ的产电过程之间的协同作用是实现该系统性能优于对照反应器的主要原因.
[Abstract]:In order to improve the performance of wastewater containing fermentative substrates, microbial electrochemical system has some disadvantages, such as the degradation of electrical performance and the poor quality of effluent in order to improve the performance of wastewater containing fermentative substrates in the process of actual wastewater treatment. The continuous stirred tank reactor was coupled to construct an integrated continuous stirred microbial electrochemical system (CSM ERA). The optimal operating conditions of the system were determined as follows: running in a continuous flow mode. When the HRT was 12 h and the influent COD concentration was 6 000 mg 路L ~ (-1), the maximum power density of the four batteries in the system was 583 卤9). The removal rate of COD was 87.1 卤1.1%. The methane yield was 1.48 卤0.15 L 路L ~ (-1) 路d ~ (-1) 路d ~ (-1), which was compared with the control continuous stirred tank reactor. The removal rate of COD and methane yield were increased by 61.6% and 244.2, respectively. The bottom end of CSMER is the whole mixed mixing area (CMZ) with Clostridium 10. 0). Acidaminococcus 11. 7) and Lactococcus 10.8). The top of the microbial electrochemical region (MEZ) to produce electric bacteria Geobacter 14. 5). The relatively complex community structure of CSMER makes it contain high abundance methanophiles (52.2) and hydrophilic methanogens (47.1). The synergy between the anaerobic digestion process of the bottom CMZ and the power generation process of the top MEZ is the main reason for the performance of the system to be better than that of the control reactor.
【作者单位】：哈尔滨工业大学市政环境工程学院;城市水资源与水环境国家重点实验室(哈尔滨工业大学);哈尔滨工业大学生命科学与技术学院;
【基金】：国家杰出青年科学基金(51125033)
【分类号】：X703
【正文快照】： 微生物电化学系统(microbial electrochemicalsystems,MESs)是以电化学活性细菌为催化剂将有机物中的化学能直接转化为电能的装置,将有机物分解代谢的同时,能够以电能、清洁能源(氢气)或生成有用代谢副产物等方式回收能量[1].MESs与其他技术相耦合衍生出多种具有不同功能的系

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