Enhanced dark fermentative hydrogen production from waste activated sludge by combining potassium ferrate with alkaline pretreatment.

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ID: 72604
2019
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Abstract
Alkaline pretreatment was demonstrated to be effective in the enhancement of hydrogen production. However, the sludge solubilization rate of alkaline pretreatment is still limited. This study reports a new strategy of KFeO + pH 9.5 for sludge mesophilic anaerobic fermentation. Experimental results showed that the combination of KFeO/pH 9.5 pretreatment had a greater hydrogen yield than the individual KFeO and pH 9.5. The maximum hydrogen yield was 19.2 mL per gram volatile suspended solids (VSS) under the optimal condition (0.02 g per gram total suspended solids KFeO + pH 9.5). Kinetic analysis showed that the highest hydrogen production potential of 19.9 mL/g VSS was obtained in the combined reactor, which well fitted the first-order kinetic model (R = 0.9925). Besides, the fermentation type was mainly acetic and butyric in the combined reactor, which contributed to hydrogen production. Further analyses showed that the combined pretreatment reduced hydrogen sulfide yield, providing an environmentally friendly method to sludge treatment.
Reference Key
yang2019enhancedthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Yang, Jingnan;Liu, Xinyu;Liu, Xuran;Xu, Qiuxiang;Wang, Wenjun;Wang, Dongbo;Yang, Guojing;Fu, Qizi;Kang, Zhenyu;Yang, Qi;Liu, Yiwen;Wang, Qilin;Ni, Bing-Jie;
Journal The Science of the total environment
Year 2019
DOI
S0048-9697(19)36101-7
URL
Keywords
hydrogen production anaerobic fermentation waste activated sludge alkaline ferrate

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