Increasing 2 -Bio- (H 2 and CH 4 ) production from food waste by combining two-stage anaerobic digestion and electrodialysis for continuous volatile fatty acids removal.

Autor: Hassan GK; Sustainable Environment Research Centre, Faculty of Computing Engineering and Science, University of South Wales, Pontypridd CF37 1DL, United Kingdom; Water Pollution Research Department, National Research Centre, 33 Bohouth St., P.O. Box 12622, Dokki, Giza, Egypt. Electronic address: gk.hassan@nrc.sci.eg., Jones RJ; Sustainable Environment Research Centre, Faculty of Computing Engineering and Science, University of South Wales, Pontypridd CF37 1DL, United Kingdom., Massanet-Nicolau J; Sustainable Environment Research Centre, Faculty of Computing Engineering and Science, University of South Wales, Pontypridd CF37 1DL, United Kingdom., Dinsdale R; Sustainable Environment Research Centre, Faculty of Computing Engineering and Science, University of South Wales, Pontypridd CF37 1DL, United Kingdom., Abo-Aly MM; Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt., El-Gohary FA; Water Pollution Research Department, National Research Centre, 33 Bohouth St., P.O. Box 12622, Dokki, Giza, Egypt., Guwy A; Sustainable Environment Research Centre, Faculty of Computing Engineering and Science, University of South Wales, Pontypridd CF37 1DL, United Kingdom.
Jazyk: angličtina
Zdroj: Waste management (New York, N.Y.) [Waste Manag] 2021 Jun 15; Vol. 129, pp. 20-25. Date of Electronic Publication: 2021 May 18.
DOI: 10.1016/j.wasman.2021.05.006
Abstrakt: A novel approach of using two stage anaerobic digestion coupled with electrodialysis technology has been investigated. This approach was used to improving bio hydrogen and methane yields from food waste while simultaneously producing a green chemical feedstock. The first digester was used for hydrogen production and the second digester was used for methane production. The first digester was combined with continuous separation of volatile fatty acids using electrodialysis. The concentrations of carbohydrates, proteins and fats in the prepared food waste were 22.7%, 5.7% and 5.2% respectively. Continuous removal of volatile fatty acids during fermentation in the hydrogen digester not only increased hydrogen yields but also increased the production rate of volatile fatty acids. As a result of continuous VFA separation, hydrogen yields increased from 17.3 mL H 2 /g VS fermenter to 33.68 mL H 2 /g VS fermenter. Methane yields also increased from 28.94 mL CH 4 /g VS fermenter to 43.94 mL CH 4 /g VS fermenter . This represents a total increase in bio-energy yields of 77.1%. COD reduced by 73% after using two stage anaerobic digestion, however, this reduction increased to 86.7% after using electrodialysis technology for separation of volatile fatty acids. Electrodialysis technology coupled with anaerobic digestion improved substrate utilization, increased bioenergy yields and looks to be promising for treating complex wastes such as food waste.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: