Detailed composition evolution of food waste in an intermittent self-agitation anaerobic digestion baffled reactor

Wei-Kang Qi; Li-Fang Liu; Qi Shi; Cong Wang; Yu-You Li; Yongzhen Peng

doi:10.1016/j.biortech.2020.124342

Detailed composition evolution of food waste in an intermittent self-agitation anaerobic digestion baffled reactor

Bioresour Technol. 2021 Jan;320(Pt A):124342. doi: 10.1016/j.biortech.2020.124342. Epub 2020 Oct 29.

Authors

Wei-Kang Qi¹, Li-Fang Liu², Qi Shi², Cong Wang³, Yu-You Li⁴, Yongzhen Peng²

Affiliations

¹ National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China; Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China. Electronic address: qiweikang10@163.com.
² National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China; Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
³ Beijing Drainage Group Co., Ltd., Beijing 100044, China.
⁴ Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.

PMID: 33157439
DOI: 10.1016/j.biortech.2020.124342

Abstract

This study used an intermittent self-agitation anaerobic baffled reactor (SA-ABR) to treat food waste. The organic matter and detailed composition evolution were analyzed under continuous operation. The gas production rate was 2.43 ± 0.18 L-Gas/d/L-Re, and the biogas conversion was 0.94 L-Gas/g-TS. The effluent concentration of total chemical oxygen demand (COD) was 22.5 ± 2.44 g/L, and the removal rate of soluble COD was always over 97%. In this study, the removal rates of carbohydrate, protein, and lipids in the SA-ABR treatment were 95%, 60%, and 85%, respectively, and the concentrations were 0.11 g/L, 0.32 g/L, and 0.33 g/L, respectively. The conversion of soluble organic matter was much higher than that of insoluble substrates. The concentration of soluble pollutants was significantly lower than that of pollutants in suspended matter. The treatment of organic matter in the first half of the SA-ABR was 85-100% that of the entire reactor.

Keywords: Anaerobic digestion; Composition evolution; Mixing; Organic waste; Self-agitation.

MeSH terms

Anaerobiosis
Bioreactors
Food
Refuse Disposal*
Waste Disposal, Fluid*