Volatile fatty acids and biogas recovery using thermophilic anaerobic membrane distillation bioreactor for wastewater reclamation

Yao, M; Woo, YC; Ren, J; Tijing, LD; Choi, JS; Kim, SH; Shon, HK

Volatile fatty acids and biogas recovery using thermophilic anaerobic membrane distillation bioreactor for wastewater reclamation

Yao, M Woo, YC

Ren, J

Tijing, LD

Choi, JS Kim, SH Shon, HK

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Publication Type:: Journal Article
Citation:: Journal of Environmental Management, 2019, 231 pp. 833 - 842
Issue Date:: 2019-02-01

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Field	Value	Language
dc.contributor.author	Yao, M	en_US
dc.contributor.author	Woo, YC https://orcid.org/0000-0003-0847-3067	en_US
dc.contributor.author	Ren, J https://orcid.org/0000-0001-7124-2726	en_US
dc.contributor.author	Tijing, LD https://orcid.org/0000-0001-9398-6355	en_US
dc.contributor.author	Choi, JS	en_US
dc.contributor.author	Kim, SH	en_US
dc.contributor.author	Shon, HK https://orcid.org/0000-0002-3777-7169	en_US
dc.date.available	2018-11-01	en_US
dc.date.issued	2019-02-01	en_US
dc.identifier.citation	Journal of Environmental Management, 2019, 231 pp. 833 - 842	en_US
dc.identifier.issn	0301-4797	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131412
dc.description.abstract	© 2018 Elsevier Ltd The effects of bioreactor temperatures and salinities of an anaerobic membrane distillation bioreactor (anMDBR) on the permeation performance and their potential recovery of bioresources were fully examined in this study. To the best of our knowledge, this is the first study of a lab-scale anMDBR process utilizing sub-merged hollow fiber membranes. The hybrid system utilizing both membrane distillation (MD) and anaerobic bioreactors achieved 99.99% inorganic salt rejection regardless the operation temperatures and high initial flux from (2–4 L m−2 h−1) at 45–65 °C. However, after 7-day operation, the flux dropped by 16–50% proportional to the bioreactor temperatures. It was found that the effects of bioreactor temperatures had strong impacts on both the permeation performance and fouling behavior while salinity had insignificant effect. A compact non-porous fouling layer was observed on the membrane surface from the bioreactor operated at 65 °C while only a few depositions was found on the membrane from 45 °C bioreactor. In the present study, the optimal anMDBR temperature was found to be 45 °C, showing a balanced biogas production and membrane permeation performance including less fouling formation. At this bioreactor temperature (45 °C), the biogas yield was 0.14 L/g CODremoval, while maintaining a methane recovery of 42% in the biogas, similar recovery to those at bioreactor temperatures of 55 and 65 °C. The potential recovery of volatile fatty acids made anMDBR a more economically efficient system, in addition to its lower operation cost and smaller footprint compared with most other technologies for on-site wastewater treatment.	en_US
dc.relation	http://purl.org/au-research/grants/arc/FT140101208
dc.relation.ispartof	Journal of Environmental Management	en_US
dc.relation.isbasedon	10.1016/j.jenvman.2018.11.009	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Fatty Acids, Volatile	en_US
dc.subject.mesh	Membranes, Artificial	en_US
dc.subject.mesh	Bioreactors	en_US
dc.subject.mesh	Waste Disposal, Fluid	en_US
dc.subject.mesh	Water Purification	en_US
dc.subject.mesh	Anaerobiosis	en_US
dc.subject.mesh	Biofuels	en_US
dc.subject.mesh	Distillation	en_US
dc.subject.mesh	Waste Water	en_US
dc.title	Volatile fatty acids and biogas recovery using thermophilic anaerobic membrane distillation bioreactor for wastewater reclamation	en_US
dc.type	Journal Article
utslib.citation.volume	231	en_US
utslib.for	0502 Environmental Science and Management	en_US
pubs.embargo.period	Not known	en_US
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	closed_access
pubs.publication-status	Published	en_US
pubs.volume	231	en_US

Abstract:

© 2018 Elsevier Ltd The effects of bioreactor temperatures and salinities of an anaerobic membrane distillation bioreactor (anMDBR) on the permeation performance and their potential recovery of bioresources were fully examined in this study. To the best of our knowledge, this is the first study of a lab-scale anMDBR process utilizing sub-merged hollow fiber membranes. The hybrid system utilizing both membrane distillation (MD) and anaerobic bioreactors achieved 99.99% inorganic salt rejection regardless the operation temperatures and high initial flux from (2–4 L m−2 h−1) at 45–65 °C. However, after 7-day operation, the flux dropped by 16–50% proportional to the bioreactor temperatures. It was found that the effects of bioreactor temperatures had strong impacts on both the permeation performance and fouling behavior while salinity had insignificant effect. A compact non-porous fouling layer was observed on the membrane surface from the bioreactor operated at 65 °C while only a few depositions was found on the membrane from 45 °C bioreactor. In the present study, the optimal anMDBR temperature was found to be 45 °C, showing a balanced biogas production and membrane permeation performance including less fouling formation. At this bioreactor temperature (45 °C), the biogas yield was 0.14 L/g CODremoval, while maintaining a methane recovery of 42% in the biogas, similar recovery to those at bioreactor temperatures of 55 and 65 °C. The potential recovery of volatile fatty acids made anMDBR a more economically efficient system, in addition to its lower operation cost and smaller footprint compared with most other technologies for on-site wastewater treatment.

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http://hdl.handle.net/10453/131412