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The effect of higher sludge recycling rate on anaerobic treatment of palm oil mill effluent in a semi-commercial closed digester for renewable energy

Problem statement: A 500 m3 semi-commercial closed anaerobic digester was constructed for Palm Oil Mill Effluent (POME) treatment and methane gas capture for renewable energy. During the start-up operation period, the Volatile Fatty Acids (VFA) accumulation could not be controlled and caused instabi...

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Main Authors: Sulaiman, Alawi, Busu, Zainuri, Tabatabaei, Meisam, Yacob, Shahrakbah, Abd. Aziz, Suraini, Hassan, Mohd Ali, Shirai, Yoshihito
Format: Article
Language:English
Published: Science Publications 2009
Online Access:http://psasir.upm.edu.my/id/eprint/17086/1/ajbbsp.2009.1.6.pdf
http://psasir.upm.edu.my/id/eprint/17086/
http://thescipub.com/abstract/10.3844/ajbbsp.2009.1.6
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spelling my.upm.eprints.170862017-12-04T05:37:16Z http://psasir.upm.edu.my/id/eprint/17086/ The effect of higher sludge recycling rate on anaerobic treatment of palm oil mill effluent in a semi-commercial closed digester for renewable energy Sulaiman, Alawi Busu, Zainuri Tabatabaei, Meisam Yacob, Shahrakbah Abd. Aziz, Suraini Hassan, Mohd Ali Shirai, Yoshihito Problem statement: A 500 m3 semi-commercial closed anaerobic digester was constructed for Palm Oil Mill Effluent (POME) treatment and methane gas capture for renewable energy. During the start-up operation period, the Volatile Fatty Acids (VFA) accumulation could not be controlled and caused instability on the system. Approach: A settling tank was installed and sludge was recycled as to provide a balanced microorganisms population for the treatment of POME and methane gas production. The effect of sludge recycling rate was studied by applying Organic Loading Rates (OLR)(between 1.0 and 10.0 kgCOD m-3 day-1) at different sludge recycling rates (6, 12 and 18 m3 day-1). Results: At sludge recycling rate of 18 m3 day-1, the maximum OLR was 10.0 kgCOD m-3 day-1 with biogas and methane productivity of 1.5 and 0.9 m3 m-3 day-1, respectively. By increasing the sludge recycling rate the VFA concentration was controlled below its inhibitory limit (1000 mg L-1) and the COD removal efficiency recorded was above 95% which indicated good treatment performance for the digester. Two methanogens species (Methanosarcina sp. and Methanosaeta concilii) had been identified from sludge samples obtained from the digester and recycled stream. Conclusion: By increasing the sludge recycling rate upon higher application of OLR, the treatment process was kept stable with high COD removal efficiency. The biogas and methane productivity were initially improved but reduced once OLR and recycling rate were increased to 10.0 kg COD m3 day-1 and 18 m3 day-1 respectively. Science Publications 2009 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/17086/1/ajbbsp.2009.1.6.pdf Sulaiman, Alawi and Busu, Zainuri and Tabatabaei, Meisam and Yacob, Shahrakbah and Abd. Aziz, Suraini and Hassan, Mohd Ali and Shirai, Yoshihito (2009) The effect of higher sludge recycling rate on anaerobic treatment of palm oil mill effluent in a semi-commercial closed digester for renewable energy. American Journal of Biochemistry and Biotechnology, 5 (1). pp. 1-6. ISSN 1553-3468; ESSN: 1558-6332 http://thescipub.com/abstract/10.3844/ajbbsp.2009.1.6 10.3844/ajbbsp.2009.1.6
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Problem statement: A 500 m3 semi-commercial closed anaerobic digester was constructed for Palm Oil Mill Effluent (POME) treatment and methane gas capture for renewable energy. During the start-up operation period, the Volatile Fatty Acids (VFA) accumulation could not be controlled and caused instability on the system. Approach: A settling tank was installed and sludge was recycled as to provide a balanced microorganisms population for the treatment of POME and methane gas production. The effect of sludge recycling rate was studied by applying Organic Loading Rates (OLR)(between 1.0 and 10.0 kgCOD m-3 day-1) at different sludge recycling rates (6, 12 and 18 m3 day-1). Results: At sludge recycling rate of 18 m3 day-1, the maximum OLR was 10.0 kgCOD m-3 day-1 with biogas and methane productivity of 1.5 and 0.9 m3 m-3 day-1, respectively. By increasing the sludge recycling rate the VFA concentration was controlled below its inhibitory limit (1000 mg L-1) and the COD removal efficiency recorded was above 95% which indicated good treatment performance for the digester. Two methanogens species (Methanosarcina sp. and Methanosaeta concilii) had been identified from sludge samples obtained from the digester and recycled stream. Conclusion: By increasing the sludge recycling rate upon higher application of OLR, the treatment process was kept stable with high COD removal efficiency. The biogas and methane productivity were initially improved but reduced once OLR and recycling rate were increased to 10.0 kg COD m3 day-1 and 18 m3 day-1 respectively.
format Article
author Sulaiman, Alawi
Busu, Zainuri
Tabatabaei, Meisam
Yacob, Shahrakbah
Abd. Aziz, Suraini
Hassan, Mohd Ali
Shirai, Yoshihito
spellingShingle Sulaiman, Alawi
Busu, Zainuri
Tabatabaei, Meisam
Yacob, Shahrakbah
Abd. Aziz, Suraini
Hassan, Mohd Ali
Shirai, Yoshihito
The effect of higher sludge recycling rate on anaerobic treatment of palm oil mill effluent in a semi-commercial closed digester for renewable energy
author_facet Sulaiman, Alawi
Busu, Zainuri
Tabatabaei, Meisam
Yacob, Shahrakbah
Abd. Aziz, Suraini
Hassan, Mohd Ali
Shirai, Yoshihito
author_sort Sulaiman, Alawi
title The effect of higher sludge recycling rate on anaerobic treatment of palm oil mill effluent in a semi-commercial closed digester for renewable energy
title_short The effect of higher sludge recycling rate on anaerobic treatment of palm oil mill effluent in a semi-commercial closed digester for renewable energy
title_full The effect of higher sludge recycling rate on anaerobic treatment of palm oil mill effluent in a semi-commercial closed digester for renewable energy
title_fullStr The effect of higher sludge recycling rate on anaerobic treatment of palm oil mill effluent in a semi-commercial closed digester for renewable energy
title_full_unstemmed The effect of higher sludge recycling rate on anaerobic treatment of palm oil mill effluent in a semi-commercial closed digester for renewable energy
title_sort effect of higher sludge recycling rate on anaerobic treatment of palm oil mill effluent in a semi-commercial closed digester for renewable energy
publisher Science Publications
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/17086/1/ajbbsp.2009.1.6.pdf
http://psasir.upm.edu.my/id/eprint/17086/
http://thescipub.com/abstract/10.3844/ajbbsp.2009.1.6
_version_ 1643826409341190144
score 13.211869

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