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An integrated anaerobic system for on-site treatment of wastewater from food waste disposer

  • Yong Hu
  • Chen Shi
  • Takuro KobayashiEmail author
  • Kai-Qin XuEmail author
Resource Recovery from Wastewater, Solid Waste and Waste Gas: Engineering and Management Aspects
  • 41 Downloads

Abstract

In this study, an integrated system of siphon-driven self-agitated anaerobic reactor (SDSAR) and anaerobic fixed bed reactor (AFBR) was conducted for the treatment of wastewater from food waste disposer (FWD), and the effect of influent total solids (TS) concentration on the process performance was evaluated. When the influent TS concentration increased from 7.04 to 15.5 g/L, the methane gas production rate increased from 0.45 to 0.92 L-CH4/L/day. However, with the influent TS concentration of food waste (FW) further increased to 23.5 g/L, a large amount of scum formed and accumulated in the SDSAR. According to the result of chemical oxygen demand (COD) recovery, the proportion of COD remained in the effluent at different TS concentrations was only around 2%. On the other hand, with an increase in TS concentration, the proportion of COD remained in the reactors increased significantly. Our results demonstrated that effluent from the integrated system can meet the water quality requirements recommended by Japan Sewage Works Association (JSWA) for wastewater from FWD. In addition, to enhance the process stability, the influent TS concentration should be maintained below 15.5 g/L.

Keywords

Biogas Total solids Anaerobic digestion Siphon-driven self-agitated anaerobic reactor (SDSAR) Anaerobic fixed bed reactor (AFBR) 

Notes

Acknowledgments

This work was conducted as a part of the Sustainable Material Cycles Research Program - Project Five: “Development of Next Generation Technologies for 3 “R”- supported by the National Institute for Environmental Studies, Japan.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Center for Material Cycles and Waste Management ResearchNational Institute for Environmental StudiesTsukubaJapan
  2. 2.Graduate School of Life and Environmental SciencesUniversity of TsukubaTsukubaJapan
  3. 3.Fujian Ospring Technology Development Co., Ltd.FuzhouChina

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