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Carbon-based Conductive Materials Accelerated Methane Production in Anaerobic Digestion of Waste Fat, Oil and Grease by Xia He; Zhenyu Guo; Jian Lu; Ping Zhang is a Engineering article available to read on EtoBox.

What is Carbon-based Conductive Materials Accelerated Methane Production in Anaerobic Digestion of Waste Fat, Oil and Grease about?

Little is known about the effect of carbon-based conductive material (CM) addition on the anaerobic co-digestion of fat, oil and grease (FOG) and waste activated sludge (WAS). In this study, three types of carbon-based CMs (nano-graphite (NG), granular activated carbon (GAC), and carbon cloth (CC)) and nine dosages were evaluated for their influences on co-digestion performance. The best dosage was achieved at 0.2 g/L NG, 10 g/L GAC, and 1 cm × 5 cm CC with 13-22% incremental methane production, 25-55% increased VS removal and 28-32% enhanced COD conversion efficiency compared to the control. The highest total amount of bacteria/archaea was found in CC (1 cm × 5 cm), followed by GAC at 10 g/L and NG at 0.2 g/L, which were all higher than those of the control. Microbial community analysis revealed that direct interspecies electron transfer (DIET)-mediated syntrophic acetate oxidation (SAO) enabling faster acetate conversion might be responsible for the enhancement of methane production.

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Author

Xia He; Zhenyu Guo; Jian Lu; Ping Zhang

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Engineering (Physical Sciences)