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Biological power generation and earthworm assisted sludge treatment wetland to remove organic matter in sludge and synchronous power generation
Science of the Total Environment ( IF 8.2 ) Pub Date : 2021-02-19 , DOI: 10.1016/j.scitotenv.2021.145909
Huiyuan Zhong , Xiao Liu , Yang Tian , Ying Zhang , Chang Liu

In order to eliminate the weak degradation ability of organic matter in sludge treatment wetland (STW). In current work, a combined biological power generation and earthworm assisted sludge treatment wetland (BE-STW) system is proposed for the first time to accelerate degradation and dehydration process of organics in STW, thusly, recovering biomass energy in sludge. Experimental results show that S4 system (earthworm and bioelectricity combined) yields a voltage of 0.832 V and maximum power density of 94.98 W/m2 in the 5th day. The combination of earthworm, microorganism and plants in STW system can reduce the ratio of volatile solids to total solids (VS/TS) to 15% while the removal rate of total chemical oxygen demand (TCOD) reaches 92.1%. The BE-STW system increases sludge particle size while reduces absolute value of Zeta and extracellular polymeric substances (EPS) content, so that the moisture content of effluent sludge retains to 66.8%. Meanwhile, the richness of bacterial communities in S4 proves that bioelectrochemistry and earthworm can effectively improve the sludge treatment effect.



中文翻译:

生物发电和worm辅助污泥处理湿地去除污泥中的有机物并同步发电

为了消除污泥处理湿地(STW)中有机物的弱降解能力。在目前的工作中,首次提出了生物发电和assist辅助污泥处理湿地(BE-STW)的组合系统,以加速污水处理厂中有机物的降解和脱水过程,从而回收污泥中的生物质能。实验结果表明,S 4系统(worm和生物电相结合)产生的电压为0.832 V,最大功率密度为94.98 W / m 2。在第5天。STW系统中and,微生物和植物的结合可以将挥发性固体占总固体的比率(VS / TS)降低至15%,而总化学需氧量(TCOD)的去除率达到92.1%。BE-STW系统增加了污泥的粒径,同时降低了Zeta的绝对值和细胞外聚合物质(EPS)的含量,因此出水污泥的水分含量保持在66.8%。同时,S 4中细菌群落的丰富性证明了生物电化学和worm可以有效提高污泥的处理效果。

更新日期:2021-02-25
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