Optimization of high-solid waste activated sludge concentration for hydrogen production in microbial electrolysis cells and microbial community diversity analysis
Optimization of high-solid waste activated sludge concentration for hydrogen production in microbial electrolysis cells and microbial community diversity analysis
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微生物电解槽制氢高固废活性污泥浓度优化及微生物群落多样性分析
DOI：
10.1016/j.ijhydene.2014.09.163
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发表时间：
2014-12
影响因子：
7.2
通讯作者：
Ren, Nanqi
中科院分区：
文献类型：
--
作者：
Liu, Qian;Zhou, Aijuan;Bai, Sunwen;Ren, Nanqi
为了提高高固体废弃物活性污泥（WAS）中氢气的回收率，采用微生物电解槽（MEC）作为一种有效的装置。首先研究了WAS浓度的影响。最佳产氢浓度为7.6gVSS/L。以未处理过的废弃物（R-WAS）和经碱处理过的废弃物（A-WAS）为原料的微生物发酵器的最大产氢量分别达到4.66 ± 1.90 mg-H2/g VSS和11.42 ± 2.43 mg-H2/g VSS，远高于传统厌氧消化的产氢量。此外，在最佳浓度下没有丙酸积累。A-WAS投加在MEC中也实现了有效的污泥减量。52.9 A-WAS微生物反应器对TCOD的去除率为± 1.3%，对蛋白质的降解率为50.4 ± 0.8%。16 SrRNA基因的454焦磷酸测序分析表明，外生产电菌Geobacteria和发酵菌Petrimonas之间存在互养作用，这种互养作用明显地驱动了WAS培养的MEC的高效运行。
To enhance hydrogen recovery from high-solid waste activated sludge (WAS), microbial electrolysis cells (MECs) were used as an efficient device. The effects of WAS concentrations were firstly investigated. Optimal concentration for hydrogen production was 7.6 g VSS/L. Maximum hydrogen yields reached to 4.66 ± 1.90 mg-H2/g VSS and 11.42 ± 2.43 mg-H2/g VSS for MECs fed with raw WAS (R-WAS) and alkaline-pretreated WAS (A-WAS) respectively, which was much higher than that obtained traditional anaerobic digestion. Moreover, no propionic acid accumulation was achieved at the optimal concentration. Effective sludge reduction was also achieved in MECs feeding with A-WAS. 52.9 ± 1.3% TCOD were removed in A-WAS MECs, meanwhile, protein degradation were 50.4 ± 0.8%. The 454 pyrosequencing analysis of 16S rRNA gene revealed the syntrophic interactions were existed between exoelectrogenGeobacterand fermentative bacteriaPetrimonas,which apparently drove the efficient performance of MECs fed with WAS.
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