Study on the treatment of corn alcohol wastewater by the internal circulation anaerobic reactor

Author:

Ji Junlin12,Xu Guoqin13,Yang Hong1,Liu Jing1,Wang Changmei1,Yin Fang1ORCID,Zhang Wudi1,Hao Shumei1

Affiliation:

1. a School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, China

2. b Economic Crop Technology Extension Station, Agricultural and Rural Bureau of Honghe Hani and Yi Autonomous Prefecture, Mengzi 661100, China

3. c College of Biological and Agricultural Science, Honghe University, Mengzi 661100, China

Abstract

Abstract To comprehensively assess the efficacy of employing the internal circulation (IC) anaerobic reactor for corn alcohol wastewater treatment and investigate its feasibility, this study focused on anaerobic digestion parameters, energy balance, and the composition of the prokaryotic microbial community. During the operation of the reactor, the hydraulic retention time was progressively reduced from 4.8 to 1.6 days while achieving an average organic loading rate of 12.46 kg chemical oxygen demand (COD)/(m3·d). Moreover, the removal rate of COD exceeded 98%, and the energy balance (ΔE) reached 10.29 kJ/g fed COD. The initial manifestation of organic acidosis in the reactor was a decline in gas production, which is primarily caused by propionic acid accumulation. The subsequent analysis revealed a high diversity of prokaryotes in granular sludge, with the predominant archaea primarily involved in methane production through the acetic acid pathway. The IC anaerobic reactor shows exceptional performance in treating corn alcohol wastewater by optimizing its operating conditions. Energy balance analysis confirmed the feasibility of the process. The findings of this study may offer valuable insights for optimizing control strategies and engineering applications.

Funder

Special Basic Cooperative Research Programs of Yunnan Provincial Undergraduate Universities’ Association

Yunnan Province Special Project for International Science and Technology cooperation

Virtual Simulation Experimental Teaching Project—Biogas Project Based on Waste

Publisher

IWA Publishing

Subject

Water Science and Technology,Environmental Engineering

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