TY  - JOUR
N2  - 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.
N1  - cited By 58
ID  - scholars17177
TI  - Anaerobic digestate as a low-cost nutrient source for sustainable microalgae cultivation: A way forward through waste valorization approach
KW  - Ammonia; Anaerobic digestion; Costs; Microorganisms; Nutrients
KW  -  Anaerobics; Anerobic digestate; Digestate; Inhibition; Low-costs; Microalgae cultivation; Nutrient sources; Organic wastes; Organics; Waste valorizations
KW  -  Algae
KW  -  ammonia; carbon; carbon dioxide; metal; nitrogen; phosphorus; biofuel
KW  -  anaerobic digestion; inhibition; microalga; nutrient dynamics; organic compound; valorization; wastewater treatment
KW  -  algal growth; anaerobic digestate; anaerobic digestion; biofuel production; cost; desulfurization; dilution; microalga; nitrification; nonhuman; nutrient; organic waste; Review; species cultivation; turbidity; waste valorization; anaerobic growth
KW  -  Anaerobiosis; Biofuels; Microalgae; Nutrients; Phosphorus
AV  - none
A1  - Chong, C.C.
A1  - Cheng, Y.W.
A1  - Ishak, S.
A1  - Lam, M.K.
A1  - Lim, J.W.
A1  - Tan, I.S.
A1  - Show, P.L.
A1  - Lee, K.T.
JF  - Science of the Total Environment
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114411182&doi=10.1016%2fj.scitotenv.2021.150070&partnerID=40&md5=d0f61e6edd9001908443f15f175ecff8
VL  - 803
Y1  - 2022///
PB  - Elsevier B.V.
SN  - 00489697
ER  -