Location: Livestock Nutrient Management ResearchTitle: Biological treatment of biowaste as an innovative source of CO – the role of composting process
|SOBIERAJ, KAROLINA - WROCLAW UNIVERSITY OF ENVIRONMENTAL AND LIFE SCIENCES|
|STEGENTA-DABROWSKA, SYLWIA - WROCLAW UNIVERSITY OF ENVIRONMENTAL AND LIFE SCIENCES|
|LUO, GANG - FUDAN UNIVERSITY|
|BIALOWIEC, ANDRZEJ - WROCLAW UNIVERSITY OF ENVIRONMENTAL AND LIFE SCIENCES|
Submitted to: Frontiers in Bioengineering and Biotechnology
Publication Type: Review Article
Publication Acceptance Date: 1/30/2023
Publication Date: 2/9/2023
Citation: Sobieraj, K., Stegenta-Dabrowska, S., Luo, G., Koziel, J.A., Bialowiec, A. 2023. Biological treatment of biowaste as an innovative source of CO – the role of composting process. Frontiers in Bioengineering and Biotechnology. 11. Article 1126737. https://doi.org/10.3389/fbioe.2023.1126737.
Interpretive Summary: New technologies are needed for the disposal of agricultural related waste and by-products. Carbon monoxide (CO) and hydrogen (H2) are essential ‘building blocks’ for producing everyday chemicals on industrial scale. Both CO and H2 can also be generated through a lesser-known biorenewable pathways, such as composting and methane fermentation. To date, however, the CO production from biological waste treatment processes is not well described in the literature. The demand for biowaste treatment processes continues to grow worldwide, both in terms of the total mass and types of bio-waste subjected to treatments and resource recovery. Thus, this review describes the basic CO formation mechanisms and conditions which control its production during aerobic and anaerobic bio-waste treatment. Specific focus is placed on the role of carbon monoxide hydrogenase (CODH) activity as the controlling agent for the net CO production, and further transformation into H2 via water gas shift reaction. This review summarizes the necessary basic biochemistry knowledge needed for realization of initial steps towards biobased hydrogen economy.
Technical Abstract: The existing knowledge of the CO production during aerobic and anaerobic bio-waste treatment and storage was critically reviewed and summarized. CO-metabolizing microorganisms, pathways, and enzymes present in CO production and consumption were evaluated. The importance of CO dehydrogenase (CODH) enzyme activity has been discussed in detail, especially in water-gas shift (WGS) reactions leading to biohydrogen production. The main review findings are: (i) the influence of the type of substrate and process parameters such as waste moisture, aeration, fragmentation on CO production is still unknown; (ii) studies describing CO metabolism and production during bio-waste treatment were based on individual bacterial strains in laboratory conditions; (iii) the current body of knowledge does not reflect the variety of microorganisms and environmental conditions that affect the CO in full-scale conditions (e.g., compost pile or anaerobic reactor); and (iv) CODH was identified as a key enzyme for CO production in anaerobic conditions. The CODH plays an important role in the biological mediation of WGS reaction and could guide future directions in industrial hydrogen production.