Approaches to mitigation of hydrogen sulfide during anaerobic digestion process – A review
Loading...
Date
2023
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Heliyon
Abstract
Anaerobic digestion (AD) is the primary technology for energy production from wet biomass under a limited oxygen supply. Various wastes rich in organic content have been renowned for enhancing the process of biogas production. However, several other intermediate unwanted products such as hydrogen sulfide, ammonia, carbon dioxide, siloxanes and halogens have been generated during the process, which tends to lower the quality and quantity of the harvested biogas. The removal of hydrogen sulfide from wastewater, a potential substrate for anaerobic digestion, using various technologies is covered in this study. It is recommended that microaeration would increase the higher removal efficiency of hydrogen sulfide based on a number of benefits for the specific method. The process is primarily accomplished by dosing smaller amounts of oxygen in the digester, which increases the system's oxidizing capacity by rendering the sulfate reducing bacteria responsible for converting sulfate ions to hydrogen sulfide inactive. This paper reviews physicochemical and biological methods that have been in place to eliminate the effects of hydrogen sulfide from wastewater treated anaerobically and future direction to remove hydrogen sulfide from biogas produced.
Description
Full-text. Available at https://doi.org/10.1016/j.heliyon.2023.e19768
Keywords
Anaerobic digestion (AD), Energy production, Wet biomass, Organic waste, Biogas production, Hydrogen sulfide, Ammonia, Carbon dioxide, Siloxanes, Halogens, Wastewater treatment, Microaeration, Oxidizing capacity, Sulfate reducing bacteria, Physicochemical methods, Biological methods, Biogas quality, Biogas quantity, Hydrogen sulfide removal, Future directions.
Citation
Mutegoa, E., & Sahini, M. G. (2023). Approaches to mitigation of hydrogen sulfide during anaerobic digestion process–A review. Heliyon.