A microbial electrochemical hybrid system for simultaneous sludge treatment, acid production, and desalination.
A microbial electrochemical hybrid system for simultaneous sludge treatment, acid production, and desalination.
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DOI：
10.1016/j.scitotenv.2020.144153
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
Peng Zhang;Zhengyi Sun;Jinshuo Zhang;B. Pan;Yujie Feng
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文献类型：
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作者：
Peng Zhang;Zhengyi Sun;Jinshuo Zhang;B. Pan;Yujie Feng
污水处理厂的剩余污泥产量显著增加，污泥处置已成为一个严重的社会和环境问题。本研究构建了一个同时发电、产酸产碱、海水淡化、碱预处理和污泥降解的微生物电化学混合系统（MEHS）。MEHS中产生的碱性溶液用于原位污泥预处理。由于碱预处理的效率，MEHS（总化学需氧量（TCOD）去除率为57.2%）比SMFC（TCOD去除率为51.7%）获得更高的污泥降解效率。此外，MEHS（0.165C）可以从污泥中回收更多的电力比传统的单室微生物燃料电池（SMFC，0.133C）。此外，MEHS在脱盐（> 50%）和产酸方面表现出优异的性能。该系统为污泥的降解和多功能利用提供了一种新的解决方案。
Excess sludge production from wastewater treatment plants has significantly increased, and sludge disposal has become a serious social and environmental problem. In this study, we constructed a microbial electrochemical hybrid system (MEHS) for simultaneous electricity generation, acid and alkali production, desalination, alkali pretreatment, and degradation of sludge. The alkaline solution generated in the MEHS was used for in situ sludge pretreatment. Owing to the efficiency in alkali pretreatment, a higher sludge degradation efficiency was obtained by the MEHS (Total chemical oxygen demand (TCOD) removal efficiency of 57.2%) than by the SMFC (TCOD removal efficiency of 51.7%). Moreover, the MEHS (0.165C) could recover more electricity from the sludge than a traditional single-chamber microbial fuel cell (SMFC, 0.133C). Additionally, the MEHS exhibited excellent performance in desalination (> 50%) and acid production. The system developed in this study provides a new solution for sludge degradation and multifunctional utilization.