Co-cultivation of activated sludge and microalgae for the simultaneous enhancements of nitrogen-rich wastewater bioremediation and lipid production

The symbiotic relationships between activated sludge and microalgae were explored for bio-remediating nitrogen-rich wastewater and producing lipid-based biofuel simultaneously. Various inoculation ratios of activated sludge to microalgae (AS:MA) biomasses were employed to unveil the mechanism of NH4...

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Main Authors: Leong, W.-H., Lim, J.-W., Lam, M.-K., Uemura, Y., Ho, C.-D., Ho, Y.-C.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.20884 /
Published: Taiwan Institute of Chemical Engineers 2018
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045013503&doi=10.1016%2fj.jtice.2018.03.038&partnerID=40&md5=99562d572497682bf387269a7ed28707
http://eprints.utp.edu.my/20884/
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spelling utp-eprints.208842019-02-26T02:39:45Z Co-cultivation of activated sludge and microalgae for the simultaneous enhancements of nitrogen-rich wastewater bioremediation and lipid production Leong, W.-H. Lim, J.-W. Lam, M.-K. Uemura, Y. Ho, C.-D. Ho, Y.-C. The symbiotic relationships between activated sludge and microalgae were explored for bio-remediating nitrogen-rich wastewater and producing lipid-based biofuel simultaneously. Various inoculation ratios of activated sludge to microalgae (AS:MA) biomasses were employed to unveil the mechanism of NH4 +-N removal in relation to lipid production from algal-bacterial biomass. The presence of nitrifiers in converting NH4 +-N into oxidized nitrogen (NO2 �-N and NO3 �-N) had greatly enhanced the total nitrogen removal in the co-cultivation bioreactors as compared with the individual culture of either activated sludge or microalgae. Accordingly, achieving near complete nitrogen removal (97�98) when the bioreactors were inoculated with AS:MA ratios of 1:0.75 and beyond. The kinetic growths of co-cultivated activated sludge and microalgae biomasses were also investigated using Verhulst model; demonstrating a significant increase of specific biomass growth rate with increasing of initial microalgae inoculation ratio. The AS:MA ratio of 1:0.75 was considered optimum for the symbiotic algal-bacterial interactions, attaining the highest lipid yield of 130 mg/L and flocculation efficiency of 42 which would aid the biomass harvesting process. © 2018 Taiwan Institute of Chemical Engineers Taiwan Institute of Chemical Engineers 2018 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045013503&doi=10.1016%2fj.jtice.2018.03.038&partnerID=40&md5=99562d572497682bf387269a7ed28707 Leong, W.-H. and Lim, J.-W. and Lam, M.-K. and Uemura, Y. and Ho, C.-D. and Ho, Y.-C. (2018) Co-cultivation of activated sludge and microalgae for the simultaneous enhancements of nitrogen-rich wastewater bioremediation and lipid production. Journal of the Taiwan Institute of Chemical Engineers, 87 . pp. 216-224. http://eprints.utp.edu.my/20884/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description The symbiotic relationships between activated sludge and microalgae were explored for bio-remediating nitrogen-rich wastewater and producing lipid-based biofuel simultaneously. Various inoculation ratios of activated sludge to microalgae (AS:MA) biomasses were employed to unveil the mechanism of NH4 +-N removal in relation to lipid production from algal-bacterial biomass. The presence of nitrifiers in converting NH4 +-N into oxidized nitrogen (NO2 �-N and NO3 �-N) had greatly enhanced the total nitrogen removal in the co-cultivation bioreactors as compared with the individual culture of either activated sludge or microalgae. Accordingly, achieving near complete nitrogen removal (97�98) when the bioreactors were inoculated with AS:MA ratios of 1:0.75 and beyond. The kinetic growths of co-cultivated activated sludge and microalgae biomasses were also investigated using Verhulst model; demonstrating a significant increase of specific biomass growth rate with increasing of initial microalgae inoculation ratio. The AS:MA ratio of 1:0.75 was considered optimum for the symbiotic algal-bacterial interactions, attaining the highest lipid yield of 130 mg/L and flocculation efficiency of 42 which would aid the biomass harvesting process. © 2018 Taiwan Institute of Chemical Engineers
format Article
author Leong, W.-H.
Lim, J.-W.
Lam, M.-K.
Uemura, Y.
Ho, C.-D.
Ho, Y.-C.
spellingShingle Leong, W.-H.
Lim, J.-W.
Lam, M.-K.
Uemura, Y.
Ho, C.-D.
Ho, Y.-C.
Co-cultivation of activated sludge and microalgae for the simultaneous enhancements of nitrogen-rich wastewater bioremediation and lipid production
author_sort Leong, W.-H.
title Co-cultivation of activated sludge and microalgae for the simultaneous enhancements of nitrogen-rich wastewater bioremediation and lipid production
title_short Co-cultivation of activated sludge and microalgae for the simultaneous enhancements of nitrogen-rich wastewater bioremediation and lipid production
title_full Co-cultivation of activated sludge and microalgae for the simultaneous enhancements of nitrogen-rich wastewater bioremediation and lipid production
title_fullStr Co-cultivation of activated sludge and microalgae for the simultaneous enhancements of nitrogen-rich wastewater bioremediation and lipid production
title_full_unstemmed Co-cultivation of activated sludge and microalgae for the simultaneous enhancements of nitrogen-rich wastewater bioremediation and lipid production
title_sort co-cultivation of activated sludge and microalgae for the simultaneous enhancements of nitrogen-rich wastewater bioremediation and lipid production
publisher Taiwan Institute of Chemical Engineers
publishDate 2018
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045013503&doi=10.1016%2fj.jtice.2018.03.038&partnerID=40&md5=99562d572497682bf387269a7ed28707
http://eprints.utp.edu.my/20884/
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score 11.62408

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