Enhancing methane production of palm oil mill effluent using two-stage domesticated shear-loop anaerobic contact stabilization system

Palm Oil Mill (POM) effluent is the primary discharge from the industrial clarifiers during POM processing and a potential substrate for methane production. However, due to its rich content of sulfate components, the initial fermentation phase of anaerobic digestion is highly acidifying which leads...

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Main Authors: Tijani, Hamzat, Abdullah, Norhayati, Yuzir, Ali
Format: Article
Published: Elsevier Ltd 2018
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Online Access:http://eprints.utm.my/id/eprint/84647/
http://dx.doi.org/10.1016/j.jclepro.2018.07.259
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spelling my.utm.846472020-02-27T03:21:22Z http://eprints.utm.my/id/eprint/84647/ Enhancing methane production of palm oil mill effluent using two-stage domesticated shear-loop anaerobic contact stabilization system Tijani, Hamzat Abdullah, Norhayati Yuzir, Ali T Technology (General) Palm Oil Mill (POM) effluent is the primary discharge from the industrial clarifiers during POM processing and a potential substrate for methane production. However, due to its rich content of sulfate components, the initial fermentation phase of anaerobic digestion is highly acidifying which leads to severe performance losses, digester's instability, and even culture crash. This study introduces a new reactor design, shear-loop anaerobic contact stabilization (SLACS) system to enhance the methane productivity of POM substrate. The treatment profiles, including the influence of feed COD/SO4 2− ratio, pH and sulfide inhibition was examined for the shear-loop anaerobic bed (SLAB) and the anaerobic plug flow (APF) units of the SLACS system which functions as a dissimilatory sulfate reduction phase and a methanogenic phase, respectively. Experimental observations indicated that methane (CH4) production, COD and sulfate removal were influenced by the feed COD/SO4 2− ratios. In addition, the performance of the one-stage domesticated digestion of POM substrate was compare with the two-stage domesticated SLACS system. During two-stage domestication, methane productivity was 256 mL g−1 VS, a 32% methanogenic proficiency higher than that of the one-stage digestion. The SLAB unit had great advantage in averting the toxic inhibitory effect of sulfide and non-ionized H2S accumulation on the microbial community structure and the two-stage SLACS system could proficiently enhance the substrate utilization efficiency and energy recovery from POM substrates, thus enhancing methanogenesis Elsevier Ltd 2018-11 Article PeerReviewed Tijani, Hamzat and Abdullah, Norhayati and Yuzir, Ali (2018) Enhancing methane production of palm oil mill effluent using two-stage domesticated shear-loop anaerobic contact stabilization system. Journal of Cleaner Production, 200 . pp. 971-981. ISSN 0959-6526 http://dx.doi.org/10.1016/j.jclepro.2018.07.259
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic T Technology (General)
spellingShingle T Technology (General)
Tijani, Hamzat
Abdullah, Norhayati
Yuzir, Ali
Enhancing methane production of palm oil mill effluent using two-stage domesticated shear-loop anaerobic contact stabilization system
description Palm Oil Mill (POM) effluent is the primary discharge from the industrial clarifiers during POM processing and a potential substrate for methane production. However, due to its rich content of sulfate components, the initial fermentation phase of anaerobic digestion is highly acidifying which leads to severe performance losses, digester's instability, and even culture crash. This study introduces a new reactor design, shear-loop anaerobic contact stabilization (SLACS) system to enhance the methane productivity of POM substrate. The treatment profiles, including the influence of feed COD/SO4 2− ratio, pH and sulfide inhibition was examined for the shear-loop anaerobic bed (SLAB) and the anaerobic plug flow (APF) units of the SLACS system which functions as a dissimilatory sulfate reduction phase and a methanogenic phase, respectively. Experimental observations indicated that methane (CH4) production, COD and sulfate removal were influenced by the feed COD/SO4 2− ratios. In addition, the performance of the one-stage domesticated digestion of POM substrate was compare with the two-stage domesticated SLACS system. During two-stage domestication, methane productivity was 256 mL g−1 VS, a 32% methanogenic proficiency higher than that of the one-stage digestion. The SLAB unit had great advantage in averting the toxic inhibitory effect of sulfide and non-ionized H2S accumulation on the microbial community structure and the two-stage SLACS system could proficiently enhance the substrate utilization efficiency and energy recovery from POM substrates, thus enhancing methanogenesis
format Article
author Tijani, Hamzat
Abdullah, Norhayati
Yuzir, Ali
author_facet Tijani, Hamzat
Abdullah, Norhayati
Yuzir, Ali
author_sort Tijani, Hamzat
title Enhancing methane production of palm oil mill effluent using two-stage domesticated shear-loop anaerobic contact stabilization system
title_short Enhancing methane production of palm oil mill effluent using two-stage domesticated shear-loop anaerobic contact stabilization system
title_full Enhancing methane production of palm oil mill effluent using two-stage domesticated shear-loop anaerobic contact stabilization system
title_fullStr Enhancing methane production of palm oil mill effluent using two-stage domesticated shear-loop anaerobic contact stabilization system
title_full_unstemmed Enhancing methane production of palm oil mill effluent using two-stage domesticated shear-loop anaerobic contact stabilization system
title_sort enhancing methane production of palm oil mill effluent using two-stage domesticated shear-loop anaerobic contact stabilization system
publisher Elsevier Ltd
publishDate 2018
url http://eprints.utm.my/id/eprint/84647/
http://dx.doi.org/10.1016/j.jclepro.2018.07.259
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