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Effect of activated persulfate on gas production from food waste anaerobic digestion

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  • Long, Yuyang
  • Wang, Hengyi
  • Yu, Xiaoqin
  • Shen, Dongsheng
  • Yin, Jun
  • Chen, Ting

Abstract

Anaerobic digestion (AD) is an effective way to improve the utilization of food waste (FW). Activated persulfate is a powerful oxidant. This research investigated the effect of activated persulfate on gas production from FW AD. Three activation methods including heating, lighting, and ultrasonication were used. The results showed that the addition of activated persulfate promoted gas production from FW AD. And the main biogas composition were CH4, CO2, and N2. The difference in SO42− concentration further verified the effect of activated methods on producing sulfate free radicals by heating, lighting and ultrasonication from persulfate. The activated persulfate enhanced gas production by improving the organic hydrolysis. Relatively, lighting and ultrasonication were better than heating in persulfate activation. At the same time, the accumulated gas volumes from ultrasonication (587 mL) and lighting (574 mL) were significantly higher than that in heating (478 mL). The environmental impact assessment and economic assessment suggests that the addition of activated persulfate in FW AD is beneficial because of the lower secondary pollution, lower cost and higher additional value.

Suggested Citation

  • Long, Yuyang & Wang, Hengyi & Yu, Xiaoqin & Shen, Dongsheng & Yin, Jun & Chen, Ting, 2018. "Effect of activated persulfate on gas production from food waste anaerobic digestion," Energy, Elsevier, vol. 165(PB), pages 343-348.
    • Handle: RePEc:eee:energy:v:165:y:2018:i:pb:p:343-348
    DOI: 10.1016/j.energy.2018.09.178
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    References listed on IDEAS

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    1. Zhang, Jingxin & Li, Wangliang & Lee, Jonathan & Loh, Kai-Chee & Dai, Yanjun & Tong, Yen Wah, 2017. "Enhancement of biogas production in anaerobic co-digestion of food waste and waste activated sludge by biological co-pretreatment," Energy, Elsevier, vol. 137(C), pages 479-486.
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    1. Shao, Yuchao & Long, Yuyang & Zhou, Ying & Jin, Zhiyuan & Zhou, Dan & Shen, Dongsheng, 2019. "5-Hydroxymethylfurfural production from watermelon peel by microwave hydrothermal liquefaction," Energy, Elsevier, vol. 174(C), pages 198-205.
    2. Moustakas, K. & Parmaxidou, P. & Vakalis, S., 2020. "Anaerobic digestion for energy production from agricultural biomass waste in Greece: Capacity assessment for the region of Thessaly," Energy, Elsevier, vol. 191(C).

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