Effect of organic loading rate on anaerobic digestion of pig manure: Methane production, mass flow, reactor scale and heating scenarios

Na Duan*, Duojiao Zhang, Cong Lin, Yifeng Zhang, Lingying Zhao, Hongbin Liu, Zhidan Liu

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The effect of organic loading rate (OLR) with total solid (TS) control (3%–8%) on the performance of anaerobic digestion of pig manure (PM) using completely stirred anaerobic reactor was investigated. Based on the lab data, how OLR affects mass flow, construction scale and heating requirement in a farm-scale biogas plant was calculated. And three scenarios of typical reactor-heating technology were comparatively analyzed. The optimal OLR was 1.89 g volatile solid (VS)/(L.d) with methane yield of 438.38 mL/gVS in the lab condition. The lower OLR, the larger amount of water and energy consumption, lower methane production and larger amount of liquid digestate was observed. Thus, the reactor with low OLR was suitable in tropical regions with the main target of disposing PM and fertilizer production. High OLR has advantage in the investment, but owns risk of instable process for a long-term run. In our study, among the three heating supply scenarios, biogas boiler was the best option for the designed biogas plant with the given breeding scale under moderate OLR. Combined heat and power (CHP) has potential advantage for the biogas plant under high OLR.
Original languageEnglish
JournalJournal of Environmental Management
Volume231
Pages (from-to)646-652
ISSN0301-4797
DOIs
Publication statusPublished - 2019

Keywords

  • Anaerobic digestion
  • Pig manure
  • Organic loading rate
  • Mass flow
  • Biogas plant

Cite this

Duan, Na ; Zhang, Duojiao ; Lin, Cong ; Zhang, Yifeng ; Zhao, Lingying ; Liu, Hongbin ; Liu, Zhidan. / Effect of organic loading rate on anaerobic digestion of pig manure: Methane production, mass flow, reactor scale and heating scenarios. In: Journal of Environmental Management. 2019 ; Vol. 231. pp. 646-652.
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title = "Effect of organic loading rate on anaerobic digestion of pig manure: Methane production, mass flow, reactor scale and heating scenarios",
abstract = "The effect of organic loading rate (OLR) with total solid (TS) control (3{\%}–8{\%}) on the performance of anaerobic digestion of pig manure (PM) using completely stirred anaerobic reactor was investigated. Based on the lab data, how OLR affects mass flow, construction scale and heating requirement in a farm-scale biogas plant was calculated. And three scenarios of typical reactor-heating technology were comparatively analyzed. The optimal OLR was 1.89 g volatile solid (VS)/(L.d) with methane yield of 438.38 mL/gVS in the lab condition. The lower OLR, the larger amount of water and energy consumption, lower methane production and larger amount of liquid digestate was observed. Thus, the reactor with low OLR was suitable in tropical regions with the main target of disposing PM and fertilizer production. High OLR has advantage in the investment, but owns risk of instable process for a long-term run. In our study, among the three heating supply scenarios, biogas boiler was the best option for the designed biogas plant with the given breeding scale under moderate OLR. Combined heat and power (CHP) has potential advantage for the biogas plant under high OLR.",
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author = "Na Duan and Duojiao Zhang and Cong Lin and Yifeng Zhang and Lingying Zhao and Hongbin Liu and Zhidan Liu",
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Effect of organic loading rate on anaerobic digestion of pig manure: Methane production, mass flow, reactor scale and heating scenarios. / Duan, Na; Zhang, Duojiao; Lin, Cong; Zhang, Yifeng; Zhao, Lingying; Liu, Hongbin; Liu, Zhidan.

In: Journal of Environmental Management, Vol. 231, 2019, p. 646-652.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Effect of organic loading rate on anaerobic digestion of pig manure: Methane production, mass flow, reactor scale and heating scenarios

AU - Duan, Na

AU - Zhang, Duojiao

AU - Lin, Cong

AU - Zhang, Yifeng

AU - Zhao, Lingying

AU - Liu, Hongbin

AU - Liu, Zhidan

PY - 2019

Y1 - 2019

N2 - The effect of organic loading rate (OLR) with total solid (TS) control (3%–8%) on the performance of anaerobic digestion of pig manure (PM) using completely stirred anaerobic reactor was investigated. Based on the lab data, how OLR affects mass flow, construction scale and heating requirement in a farm-scale biogas plant was calculated. And three scenarios of typical reactor-heating technology were comparatively analyzed. The optimal OLR was 1.89 g volatile solid (VS)/(L.d) with methane yield of 438.38 mL/gVS in the lab condition. The lower OLR, the larger amount of water and energy consumption, lower methane production and larger amount of liquid digestate was observed. Thus, the reactor with low OLR was suitable in tropical regions with the main target of disposing PM and fertilizer production. High OLR has advantage in the investment, but owns risk of instable process for a long-term run. In our study, among the three heating supply scenarios, biogas boiler was the best option for the designed biogas plant with the given breeding scale under moderate OLR. Combined heat and power (CHP) has potential advantage for the biogas plant under high OLR.

AB - The effect of organic loading rate (OLR) with total solid (TS) control (3%–8%) on the performance of anaerobic digestion of pig manure (PM) using completely stirred anaerobic reactor was investigated. Based on the lab data, how OLR affects mass flow, construction scale and heating requirement in a farm-scale biogas plant was calculated. And three scenarios of typical reactor-heating technology were comparatively analyzed. The optimal OLR was 1.89 g volatile solid (VS)/(L.d) with methane yield of 438.38 mL/gVS in the lab condition. The lower OLR, the larger amount of water and energy consumption, lower methane production and larger amount of liquid digestate was observed. Thus, the reactor with low OLR was suitable in tropical regions with the main target of disposing PM and fertilizer production. High OLR has advantage in the investment, but owns risk of instable process for a long-term run. In our study, among the three heating supply scenarios, biogas boiler was the best option for the designed biogas plant with the given breeding scale under moderate OLR. Combined heat and power (CHP) has potential advantage for the biogas plant under high OLR.

KW - Anaerobic digestion

KW - Pig manure

KW - Organic loading rate

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KW - Biogas plant

U2 - 10.1016/j.jenvman.2018.10.062

DO - 10.1016/j.jenvman.2018.10.062

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