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Anaerobic digestate as a low-cost nutrient source for sustainable microalgae cultivation: A way forward through waste valorization approach

To suffice the escalating global energy demand, microalgae are deemed as high potential surrogate feedstocks for liquid fuels. The major encumbrance for the commercialization of microalgae cultivation is due to the high costs of nutrients such as carbon, phosphorous, and nitrogen. Meanwhile, the org...

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Main Authors: Chong, C.C., Cheng, Y.W., Ishak, S., Lam, M.K., Lim, J.W., Tan, I.S., Show, P.L., Lee, K.T.
Format: Article
Published: Elsevier B.V. 2022
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114411182&doi=10.1016%2fj.scitotenv.2021.150070&partnerID=40&md5=d0f61e6edd9001908443f15f175ecff8
http://eprints.utp.edu.my/33641/
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spelling my.utp.eprints.336412022-09-07T08:32:23Z Anaerobic digestate as a low-cost nutrient source for sustainable microalgae cultivation: A way forward through waste valorization approach Chong, C.C. Cheng, Y.W. Ishak, S. Lam, M.K. Lim, J.W. Tan, I.S. Show, P.L. Lee, K.T. To suffice the escalating global energy demand, microalgae are deemed as high potential surrogate feedstocks for liquid fuels. The major encumbrance for the commercialization of microalgae cultivation is due to the high costs of nutrients such as carbon, phosphorous, and nitrogen. Meanwhile, the organic-rich anaerobic digestate which is difficult to be purified by conventional techniques is appropriate to be used as a low-cost nutrient source for the economic viability and sustainability of microalgae production. This option is also beneficial in terms of reutilize the organic fraction of solid waste instead of discarded as zero-value waste. Anaerobic digestate is the side product of biogas production during anaerobic digestion process, where optimum nutrients are needed to satisfy the physiological needs to grow microalgae. Besides, the turbidity, competing biological contaminants, ammonia and metal toxicity of the digestate are also potentially contributing to the inhibition of microalgae growth. Thus, this review is aimed to explicate the feasibility of utilizing the anaerobic digestate to cultivate microalgae by evaluating their potential challenges and solutions. The proposed potential solutions (digestate dilution and pre-treatment, microalgae strain selection, extra organics addition, nitrification and desulfurization) corresponding to the state-of-the-art challenges are applicable as future directions of the research. © 2021 Elsevier B.V. Elsevier B.V. 2022 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114411182&doi=10.1016%2fj.scitotenv.2021.150070&partnerID=40&md5=d0f61e6edd9001908443f15f175ecff8 Chong, C.C. and Cheng, Y.W. and Ishak, S. and Lam, M.K. and Lim, J.W. and Tan, I.S. and Show, P.L. and Lee, K.T. (2022) Anaerobic digestate as a low-cost nutrient source for sustainable microalgae cultivation: A way forward through waste valorization approach. Science of the Total Environment, 803 . http://eprints.utp.edu.my/33641/
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 To suffice the escalating global energy demand, microalgae are deemed as high potential surrogate feedstocks for liquid fuels. The major encumbrance for the commercialization of microalgae cultivation is due to the high costs of nutrients such as carbon, phosphorous, and nitrogen. Meanwhile, the organic-rich anaerobic digestate which is difficult to be purified by conventional techniques is appropriate to be used as a low-cost nutrient source for the economic viability and sustainability of microalgae production. This option is also beneficial in terms of reutilize the organic fraction of solid waste instead of discarded as zero-value waste. Anaerobic digestate is the side product of biogas production during anaerobic digestion process, where optimum nutrients are needed to satisfy the physiological needs to grow microalgae. Besides, the turbidity, competing biological contaminants, ammonia and metal toxicity of the digestate are also potentially contributing to the inhibition of microalgae growth. Thus, this review is aimed to explicate the feasibility of utilizing the anaerobic digestate to cultivate microalgae by evaluating their potential challenges and solutions. The proposed potential solutions (digestate dilution and pre-treatment, microalgae strain selection, extra organics addition, nitrification and desulfurization) corresponding to the state-of-the-art challenges are applicable as future directions of the research. © 2021 Elsevier B.V.
format Article
author Chong, C.C.
Cheng, Y.W.
Ishak, S.
Lam, M.K.
Lim, J.W.
Tan, I.S.
Show, P.L.
Lee, K.T.
spellingShingle Chong, C.C.
Cheng, Y.W.
Ishak, S.
Lam, M.K.
Lim, J.W.
Tan, I.S.
Show, P.L.
Lee, K.T.
Anaerobic digestate as a low-cost nutrient source for sustainable microalgae cultivation: A way forward through waste valorization approach
author_facet Chong, C.C.
Cheng, Y.W.
Ishak, S.
Lam, M.K.
Lim, J.W.
Tan, I.S.
Show, P.L.
Lee, K.T.
author_sort Chong, C.C.
title Anaerobic digestate as a low-cost nutrient source for sustainable microalgae cultivation: A way forward through waste valorization approach
title_short Anaerobic digestate as a low-cost nutrient source for sustainable microalgae cultivation: A way forward through waste valorization approach
title_full Anaerobic digestate as a low-cost nutrient source for sustainable microalgae cultivation: A way forward through waste valorization approach
title_fullStr Anaerobic digestate as a low-cost nutrient source for sustainable microalgae cultivation: A way forward through waste valorization approach
title_full_unstemmed Anaerobic digestate as a low-cost nutrient source for sustainable microalgae cultivation: A way forward through waste valorization approach
title_sort anaerobic digestate as a low-cost nutrient source for sustainable microalgae cultivation: a way forward through waste valorization approach
publisher Elsevier B.V.
publishDate 2022
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114411182&doi=10.1016%2fj.scitotenv.2021.150070&partnerID=40&md5=d0f61e6edd9001908443f15f175ecff8
http://eprints.utp.edu.my/33641/
_version_ 1744356196343611392
score 13.211869

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