Long-term operation of the pilot scale two-stage anaerobic digestion of municipal biowaste in Ho Chi Minh City.

Nguyen, P-D; Tran, N-ST; Nguyen, T-T; Dang, B-T; Le, M-TT; Bui, X-T; Mukai, F; Kobayashi, H; Ngo, HH

Long-term operation of the pilot scale two-stage anaerobic digestion of municipal biowaste in Ho Chi Minh City.

Nguyen, P-D Tran, N-ST Nguyen, T-T Dang, B-T Le, M-TT Bui, X-T Mukai, F Kobayashi, H Ngo, HH

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Science of the Total Environment, 2021, 766, pp. 142562-142562
Issue Date:: 2021

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Field	Value	Language
dc.contributor.author	Nguyen, P-D
dc.contributor.author	Tran, N-ST
dc.contributor.author	Nguyen, T-T
dc.contributor.author	Dang, B-T
dc.contributor.author	Le, M-TT
dc.contributor.author	Bui, X-T
dc.contributor.author	Mukai, F
dc.contributor.author	Kobayashi, H
dc.contributor.author	Ngo, HH
dc.date.accessioned	2021-12-07T06:23:12Z
dc.date.available	2020-09-21
dc.date.available	2021-12-07T06:23:12Z
dc.date.issued	2021
dc.identifier.citation	Science of the Total Environment, 2021, 766, pp. 142562-142562
dc.identifier.issn	0048-9697
dc.identifier.issn	1879-1026
dc.identifier.uri	http://hdl.handle.net/10453/152196
dc.description.abstract	A pilot-scale two-stage anaerobic digestion system, which includes a feed tank (0.4 m<sup>3</sup>), a hydrolysis reactor (1.2 m<sup>3</sup>) followed by a methane fermenter (4.0 m<sup>3</sup>) was set up and run at the municipal solid waste landfill located in Ho Chi Minh City (HCMC), Vietnam. The feed that was separated from urban organic solid waste was collected at households and restaurants in District 1, HCMC. This study aimed to investigate the resource recovery performance of the pilot two-stage anaerobic digestion system, in terms of carbon recovery via biogas production and nutrient recovery from digestate. The average organic loading rate (OLR) of the system was step increased from 1.6 kg volatile solids (VS)·m<sup>-3</sup>·d<sup>-1</sup>, 2.5 kg VS·m<sup>-3</sup>·d<sup>-1</sup> and 3.8 kg VS·m<sup>-3</sup>·d<sup>-1</sup> during 400 days of operation. During the long-term operation at three OLRs, pH values and alkalinity were stable at both hydrolysis and methanogenesis stages without any addition of alkalinity for the methanogenesis phase. High buildup of propanoic acid and total volatile fatty acid concentrations in the fermenter did not drop pH values and inhibit the methanogenic process at high OLRs (2.5-3.8 kg VS m<sup>-3</sup>·d<sup>-1</sup>). The obtained total chemical oxygen demand (tCOD) removal performance was 83-87% at the OLRs ranging from 2.5 kg VS·m<sup>-3</sup>·d<sup>-1</sup> and 3.8 kg VS·m<sup>-3</sup>·d<sup>-1</sup>, respectively. The highest biogas yield of 263 ± 64 L·kg<sup>-1</sup> tCOD removed obtained at OLR of 2.5 kg VS·m<sup>-3</sup>·d<sup>-1</sup>. It is expected that a full scale 2S-AD plant with capacity of 5200 tons day<sup>-1</sup> of biowaste collected currently from municipal solid waste in HCMC may create daily electricity of 552 MWh, thermal energy of 630 MWh, and recovery of 16.1 tons of NH<sub>4</sub><sup>+</sup>-N, 11.4 tons of organic-N, and 2.1 tons of TP as both organic liquid and solid fertilizers.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier
dc.relation.ispartof	Science of the Total Environment
dc.relation.isbasedon	10.1016/j.scitotenv.2020.142562
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject.classification	Environmental Sciences
dc.subject.mesh	Methane
dc.subject.mesh	Bioreactors
dc.subject.mesh	Refuse Disposal
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Vietnam
dc.subject.mesh	Biofuels
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Biofuels
dc.subject.mesh	Bioreactors
dc.subject.mesh	Methane
dc.subject.mesh	Refuse Disposal
dc.subject.mesh	Vietnam
dc.title	Long-term operation of the pilot scale two-stage anaerobic digestion of municipal biowaste in Ho Chi Minh City.
dc.type	Journal Article
utslib.citation.volume	766
utslib.location.activity	Netherlands
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access	*
pubs.consider-herdc	false
utslib.copyright.embargo	2023-04-30T00:00:00+1000Z
dc.date.updated	2021-12-07T06:23:11Z
pubs.publication-status	Published
pubs.volume	766

Abstract:

A pilot-scale two-stage anaerobic digestion system, which includes a feed tank (0.4 m³), a hydrolysis reactor (1.2 m³) followed by a methane fermenter (4.0 m³) was set up and run at the municipal solid waste landfill located in Ho Chi Minh City (HCMC), Vietnam. The feed that was separated from urban organic solid waste was collected at households and restaurants in District 1, HCMC. This study aimed to investigate the resource recovery performance of the pilot two-stage anaerobic digestion system, in terms of carbon recovery via biogas production and nutrient recovery from digestate. The average organic loading rate (OLR) of the system was step increased from 1.6 kg volatile solids (VS)·m^-3·d^-1, 2.5 kg VS·m^-3·d^-1 and 3.8 kg VS·m^-3·d^-1 during 400 days of operation. During the long-term operation at three OLRs, pH values and alkalinity were stable at both hydrolysis and methanogenesis stages without any addition of alkalinity for the methanogenesis phase. High buildup of propanoic acid and total volatile fatty acid concentrations in the fermenter did not drop pH values and inhibit the methanogenic process at high OLRs (2.5-3.8 kg VS m^-3·d^-1). The obtained total chemical oxygen demand (tCOD) removal performance was 83-87% at the OLRs ranging from 2.5 kg VS·m^-3·d^-1 and 3.8 kg VS·m^-3·d^-1, respectively. The highest biogas yield of 263 ± 64 L·kg^-1 tCOD removed obtained at OLR of 2.5 kg VS·m^-3·d^-1. It is expected that a full scale 2S-AD plant with capacity of 5200 tons day^-1 of biowaste collected currently from municipal solid waste in HCMC may create daily electricity of 552 MWh, thermal energy of 630 MWh, and recovery of 16.1 tons of NH₄⁺-N, 11.4 tons of organic-N, and 2.1 tons of TP as both organic liquid and solid fertilizers.

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http://hdl.handle.net/10453/152196