Research Papers: Energy Systems Analysis

Effective Anaerobic Bio-Treatment of Fresh Leachate From Municipal Solid Waste Incineration Plant by Full-Scale Internal Circulation Reactor

[+] Author and Article Information
Tao Wang

School of Environment and Civil Engineering,
Jiangnan University,
Wuxi 214122, China
e-mail: wangtao0532@jiangnan.edu.cn

Zhenxing Huang

School of Environment and Civil Engineering,
Jiangnan University,
Wuxi 214122, China
e-mail: biogashuang@jiangnan.edu.cn

Hongyan Ren

School of Environment and Civil Engineering,
Jiangnan University,
Wuxi 214122, China
e-mail: renhongyan@jiangnan.edu.cn

Hengfeng Miao

School of Environment and Civil Engineering,
Jiangnan University,
1800 Lihu Avenue,
Wuxi 214122, China
e-mail: hfmiao@jiangnan.edu.cn

Minxing Zhao

School of Environment and Civil Engineering,
Jiangnan University,
Wuxi 214122, China
e-mail: mxzhao@jiangnan.edu.cn

Wenquan Ruan

School of Environment and Civil Engineering,
Jiangnan University,
1800 Lihu Avenue,
Wuxi 214122, China
e-mail: wqruan@jiangnan.edu.cn

1Corresponding authors.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received May 15, 2017; final manuscript received November 21, 2018; published online December 24, 2018. Assoc. Editor: Gongnan Xie.

J. Energy Resour. Technol 141(4), 042005 (Dec 24, 2018) (6 pages) Paper No: JERT-17-1225; doi: 10.1115/1.4042085 History: Received May 15, 2017; Revised November 21, 2018

This study aimed to investigate the effectiveness of the full-scale internal circulation (IC) reactor in biodegrading of municipal solid waste (MSW) fresh leachate under mesophilic conditions, where the anaerobic process stability, biogas yield, and sludge granulation were intensively investigated. The effects of operational parameters on the influent organic loading rate (OLR), chemical oxygen demand (COD) removal efficiency, alkalinity (ALK), pH, volatile fatty acids (VFAs) accumulation, and effluent recirculation were also studied. The results showed that the reactor operated stably and effectively. The COD removal efficiency and biogas yield could be maintained at (92.8 ± 2.0)% and (0.47 ± 0.05) m3/kg CODremoval, respectively, with the influent OLR (24.5 ± 0.9) kg COD/(m3 d) and hydraulic retention time (HRT) 2.7d during the stable operation phase. Meanwhile, this study demonstrated that 1.5–3.0 m/h would be the optimal Vup for the reactor, corresponding to the effluent recirculation of 32.5–78.0 m3/h. Moreover, it was found that the content of extracellular polymeric substances (EPS) in the anaerobic sludge increased from 50.3 to 140.7 mg/g volatile suspended solids (VSS), and the sludge had good granular performance during the reactor operation.

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Grahic Jump Location
Fig. 1

Schematic diagram of the IC reactor

Grahic Jump Location
Fig. 2

Performance of the IC reactor: (a) OLR and HRT; (b) COD concentration and COD removal efficiency; (c) biogas yield; and (d) influent flow and effluent VFAs

Grahic Jump Location
Fig. 3

Internal circulation stability evaluation: (a) VFA/ALK; and (b) influent and effluent ammoniacal nitrogen

Grahic Jump Location
Fig. 4

Variations in particle size during IC reactor operation

Grahic Jump Location
Fig. 5

Variations in EPS contents during sludge granulation



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