摘要
随着我国进口冷冻食品行业的不断发展,伴生的食品解冻废水产量不断攀升,如何实现其快速高效处理并从中获取资源/能源成为港口废水处理领域的一个迫切问题。本文研究了基于微生物燃料电池(MFC)对食品解冻废水高效处理及微生物菌群协作机制,为食品解冻废水的快速生物降解及能源化提供了一个新选项。在进水COD负荷分别为0.69、0.71及0.83 kg COD/(m^(3)·d)的条件下,MFC的峰值电压分别达到0.58V、0.62 V和0.64 V,最大功率密度分别为0.147、0.163与0.172W/m^(2),电能转化效率分别达到1.284、1.453及1.563kWh/kg COD,且对有机质的去除效果均超过80%;进水有机负荷的增加有助于提高MFC阳极微生物多样性及产电输出;微生物群落分析显示以食品解冻废水为基质的MFC阳极生物膜的主要发酵类优势菌属包括Prosthecobacter、Azospira、Petrimonas与Azospirillum等,优势的产电优势菌属包括Pseudomonas、Geobacter、Burkholderia、Clostridium等,且两类菌群的密切协作决定了MFC的产电效率。
With the continuous expansion of China’s imported frozen food industry,the associated food thawing wastewater is rising constantly. How to achieve rapid and efficient treatment with obtaining resources/bioenergy from the food thawing wastewater has become a hot topic in the field of environmental wastewater treatment. The efficient treatment of food thawing wastewater through microbial fuel cells(MFC) with elucidating the cooperative interactions of anodic microbial flora were investigated in this study,which provided a new option for the rapid biodegradation and energy recovery from food thawing wastewater. Under the influent COD loading rate of0.69,0.71 and 0.83 kg COD/(m^(3)·d),respectively,the peak voltage of MFCs reached 0.58 V,0.62 V and 0.64 V,and the corresponding maximum power density arrived to 0.147,0.163 and 0.172 W/m^(2),with the power conversion efficiency reaching 1.284,1.453 and 1.563 kWh/kg COD,respectively. The average COD removal efficiency of all MFC surpassed 80% roughly. The increase of influent organic load can be conducive to the anodic microbial diversity with power output rising. Microbial community analysis showed that the dominant bacteria in anode biofilm of MFC fed with fruit waste liquid were Prosthecobacter,Azospira,Petrimonas and Azospirillum,while the dominant electrogenesis-related bacteria included Pseudomonas,Geobacter,Burkholderia,Clostridium,etc. The synergistic cooperation of such two groups of functional genera contributed to improving the power generation of MFC.
作者
苏升
陈志坤
石椿丽
柯巍峰
Su Sheng;Chen Zhikun;Shi Chunli;Ke Weifeng(Xiamen Hejian Health Technology Services Ltd.,Xiamen,Fujian,361012,China)
出处
《口岸卫生控制》
2021年第4期44-52,共9页
Port Health Control
关键词
微生物燃料电池
食品解冻废水
生物产电
微生物群落
菌群协作
Microbial fuel cells(MFC)
Food thawing wastewater
Bioelectrogenesis
Microbial community
Microbial flora interactions
