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A comparative evaluation of an integrated hybrid bioreactor treating industrial wastewater

An integrated hybrid bioreactor (IHB) and integrated suspended bioreactor (ISB) coupling aerobic, anoxic and settling units was evaluated for industrial wastewater treatment with and without the installation of a rectangular hollow engraved submerged Perspex media in the aerobic unit. Bioreactor per...

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Main Authors: Ezechi, E.H., Kutty, S.R.M., Muda, K., Yaqub, A.
Format: Article
Published: Elsevier Ltd 2019
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85063406613&doi=10.1016%2fj.jwpe.2019.100805&partnerID=40&md5=31d792aa753d5b44183ce57a5c23e4f4
http://eprints.utp.edu.my/24930/
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spelling my.utp.eprints.249302021-08-27T08:26:03Z A comparative evaluation of an integrated hybrid bioreactor treating industrial wastewater Ezechi, E.H. Kutty, S.R.M. Muda, K. Yaqub, A. An integrated hybrid bioreactor (IHB) and integrated suspended bioreactor (ISB) coupling aerobic, anoxic and settling units was evaluated for industrial wastewater treatment with and without the installation of a rectangular hollow engraved submerged Perspex media in the aerobic unit. Bioreactor performance was examined at different overall hydraulic retention times of 36, 12, 7.2, 5.1 and 4 days, respectively. Nitrogen mass balance was analyzed to examine the inhibitory effects of metabolic by-products on nitrification in IHB. Both bioreactors exhibited a short start-up period during acclimatization. Results show a lower effluent COD concentration of 15�85 mg/L in IHB and 38.6�124 mg/L in ISB. Effluent ammonia-nitrogen was 0.65�3.5 mg/L in IHB and 0.3�4.5 mg/L in ISB. Effluent nitrate and nitrite were low in both bioreactors but lower in IHB. Mass balance analysis in IHB indicated that nitrate was the dominant ammonia metabolite and decreased with reducing HRT. Microfauna investigation showed that free swimmers, crawling and attached ciliates were major protozoans in IHB while free swimmers and attached ciliates were dominant protozoans in ISB. Kinetic evaluation demonstrates that microbial growth was higher in IHB. The Y, k d , μ max and K s for IHB was 0.1 g VSS/g COD, 0.02 per day, 0.81 per day and 1.26 g/m 3 with a correlation coefficient (R 2 ) of 0.978 while it was 0.118 g VSS/g COD, 0.04 per day, 0.635 per day and 3.93 g/m 3 with a correlation coefficient (R 2 ) of 0.988 in ISB. This study demonstrates that while both ISB and IHB were effective for industrial wastewater treatment, IHB performance was comparatively higher due to the inclusion of the submerged media. © 2019 Elsevier Ltd Elsevier Ltd 2019 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85063406613&doi=10.1016%2fj.jwpe.2019.100805&partnerID=40&md5=31d792aa753d5b44183ce57a5c23e4f4 Ezechi, E.H. and Kutty, S.R.M. and Muda, K. and Yaqub, A. (2019) A comparative evaluation of an integrated hybrid bioreactor treating industrial wastewater. Journal of Water Process Engineering, 31 . http://eprints.utp.edu.my/24930/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description An integrated hybrid bioreactor (IHB) and integrated suspended bioreactor (ISB) coupling aerobic, anoxic and settling units was evaluated for industrial wastewater treatment with and without the installation of a rectangular hollow engraved submerged Perspex media in the aerobic unit. Bioreactor performance was examined at different overall hydraulic retention times of 36, 12, 7.2, 5.1 and 4 days, respectively. Nitrogen mass balance was analyzed to examine the inhibitory effects of metabolic by-products on nitrification in IHB. Both bioreactors exhibited a short start-up period during acclimatization. Results show a lower effluent COD concentration of 15�85 mg/L in IHB and 38.6�124 mg/L in ISB. Effluent ammonia-nitrogen was 0.65�3.5 mg/L in IHB and 0.3�4.5 mg/L in ISB. Effluent nitrate and nitrite were low in both bioreactors but lower in IHB. Mass balance analysis in IHB indicated that nitrate was the dominant ammonia metabolite and decreased with reducing HRT. Microfauna investigation showed that free swimmers, crawling and attached ciliates were major protozoans in IHB while free swimmers and attached ciliates were dominant protozoans in ISB. Kinetic evaluation demonstrates that microbial growth was higher in IHB. The Y, k d , μ max and K s for IHB was 0.1 g VSS/g COD, 0.02 per day, 0.81 per day and 1.26 g/m 3 with a correlation coefficient (R 2 ) of 0.978 while it was 0.118 g VSS/g COD, 0.04 per day, 0.635 per day and 3.93 g/m 3 with a correlation coefficient (R 2 ) of 0.988 in ISB. This study demonstrates that while both ISB and IHB were effective for industrial wastewater treatment, IHB performance was comparatively higher due to the inclusion of the submerged media. © 2019 Elsevier Ltd
format Article
author Ezechi, E.H.
Kutty, S.R.M.
Muda, K.
Yaqub, A.
spellingShingle Ezechi, E.H.
Kutty, S.R.M.
Muda, K.
Yaqub, A.
A comparative evaluation of an integrated hybrid bioreactor treating industrial wastewater
author_facet Ezechi, E.H.
Kutty, S.R.M.
Muda, K.
Yaqub, A.
author_sort Ezechi, E.H.
title A comparative evaluation of an integrated hybrid bioreactor treating industrial wastewater
title_short A comparative evaluation of an integrated hybrid bioreactor treating industrial wastewater
title_full A comparative evaluation of an integrated hybrid bioreactor treating industrial wastewater
title_fullStr A comparative evaluation of an integrated hybrid bioreactor treating industrial wastewater
title_full_unstemmed A comparative evaluation of an integrated hybrid bioreactor treating industrial wastewater
title_sort comparative evaluation of an integrated hybrid bioreactor treating industrial wastewater
publisher Elsevier Ltd
publishDate 2019
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85063406613&doi=10.1016%2fj.jwpe.2019.100805&partnerID=40&md5=31d792aa753d5b44183ce57a5c23e4f4
http://eprints.utp.edu.my/24930/
_version_ 1738656659405799424
score 13.211869

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