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Outstanding energy reduction of nitrogen recovery by biohythane concept introduction by 3D-weaved anode network in microbial electrolysis cell
Resources, Conservation and Recycling ( IF 13.2 ) Pub Date : 2022-09-18 , DOI: 10.1016/j.resconrec.2022.106644
Shuai Luo, Xianzheng Zhu, Boya Fu, Fubin Liu, Lequn Sun, Kai He, Heng Yang, Xiaoyuan Zhang, Xia Huang

This work achieved nitrogen recovery from the wastewater treatment by the bioelectrochemical system with the concept of biohythane generation. In this study, 3D network electrode could improve the biohythane generation to reduce energy consumption of the nitrogen recovery, achieving the highest biohythane production rate at 0.123 m3 m−3 treated wastewater to obtain energy consumption at 0.77 kWh kg−1 N under 0.8 V, significantly lower than other traditional technologies (at about 1.3 to 14 kWh kg−1 N). Further microbial analysis was processed for voltage optimization, and 0.8 V was proved as best voltage for high abundance of Geobacter over Methanosarcina. Correlation factor and heatmap analysis indicated that the suitable voltage could benefit Geobacter growth for higher energy recovery. Furthermore, genera of Bacteroides and Azospirillum were found as key species. This study proved that the biohythane generation concept could outstandingly reduce the energy consumption for higher nitrogen recovery from wastewater treatment.



中文翻译:

微生物电解池中引入 3D 编织阳极网络的生物乙烷概念可显着降低氮回收的能量

本工作以生物乙烷产生的概念通过生物电化学系统实现了废水处理中的氮回收。在本研究中,3D 网络电极可以提高生物乙烷的生成以降低氮回收的能耗,在 0.123 m 3  m -3处理的废水中实现最高的生物乙烷产率,在 0.8 V 下获得 0.77 kWh kg -1 N 的能耗,显着低于其他传统技术(约 1.3 至 14 kWh kg -1 N)。进一步进行微生物分析以优化电压,0.8 V 被证明是高丰度Geobacter超过Methanosarcina的最佳电压. 相关因子和热图分析表明,合适的电压可以有利于地杆菌的生长,从而实现更高的能量回收。此外,还发现拟杆菌属固氮螺菌属为关键物种。这项研究证明,生物乙烷生成概念可以显着降低能耗,从而提高废水处理中的氮回收率。

更新日期:2022-09-19
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