Enhancing electron transfer in anaerobic process by supercapacitor materials: Polyaniline functionated activated carbon.

Zijing Guo, Shanshan Gao, Jie Wang, Jiayu Tian, Fangshu Qu, Mingyue Geng

Journal: Bioresource technology 2024;406():131051

PMID: 38944315

Full Text on Elsevier Science View on PubMed

Abstract

Strengthening the direct interspecies electron transfer (DIET) is an effective strategy to improve the performance of anaerobic digestion (AD) process. In this study, the polyaniline functionated activated carbon (AC-PANi) was prepared by chemical oxidative polymerization. This material possessed pseudo-capacitance properties as well as excellent charge transfer capability. The experimental results demonstrated that the incorporation of AC-PANi in AD process could efficiently increase the chemical oxygen demand (COD) removal (18.6 %) and daily methane production rate (35.3 %). The AC-PANi can also act as an extracellular acceptor to promote the synthesis of adenosine triphosphate (ATP) and secretion of extracellular enzymes as well as cytochrome C (Cyt-C). The content of coenzyme F on methanogens was also shown to be increased by 60.9 % with the addition of AC-PANi in AD reactor. Overall, this work provides an easy but feasible way to enhance AD performance by promoting DIET between acetate-producing bacteria and methanogens.

Address: School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China.; School of Civil Engineering, Guangzhou University, Guangzhou 510006, China.; School of Environmental Science and Technology, Tiangong University, Tianjin 300387, China.; School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China. Electronic address: [email protected].

DOI: 10.1016/j.biortech.2024.131051

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MeSH Terms: Aniline Compounds, Anaerobiosis, Electron Transport, Methane, Charcoal, Biological Oxygen Demand Analysis, Bioreactors, Adenosine Triphosphate