Hydrogen production promotion and energy saving in anaerobic co-fermentation of heat-treated sludge and food waste

Yuchen Zhang, Ji Qin Ni, Changqing Liu, Yihong Ke, Yuyi Zheng, Guangyin Zhen, Sihuang Xie

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The objective of this paper is to gain insights into the synergistic advantage of anaerobic co-fermentation of heat-treated sludge (HS) with food waste (FW) and heat-treated food waste (HFW) for hydrogen production. The results showed that, compared with raw sludge (RS) mixed with FW (RS-FW), the co-substrate of HS mixed with either FW (HS-FW) or HFW (HS-HFW) effectively promoted hydrogen production, with HS-HFW promoted more than HS-FW. The maximum specific hydrogen production (MSHP) and the maximum hydrogen concentration (MHC) of HS-HFW were 40.53 mL H2/g dry weight and 57.22%, respectively, and 1.21- and 1.45-fold as high as those from HS-FW. The corresponding fermentation was ethanol type for HS-HFW and butyric acid type for HS-FW. The net energy production from RS-FW and HS-FW was both negative, but it was positive (2.57 MJ) from 40% HFW addition to HS-HFW. Anaerobic fermentation was more viable for HS-HFW.

Original languageEnglish
Pages (from-to)14831-14844
Number of pages14
JournalEnvironmental Science and Pollution Research
Volume31
Issue number10
DOIs
StatePublished - Feb 2024

Keywords

  • Anaerobic fermentation
  • Energy balance
  • Heat-treated substrate
  • Hydrogen fermentation
  • Renewable energy
  • Substrate transformation

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