%0 Journal Article
%@ 18761070
%A Leong, W.-H.
%A Lim, J.-W.
%A Lam, M.-K.
%A Uemura, Y.
%A Ho, C.-D.
%A Ho, Y.-C.
%D 2018
%F scholars:10277
%I Taiwan Institute of Chemical Engineers
%J Journal of the Taiwan Institute of Chemical Engineers
%K Algae; Biomass; Bioreactors; Bioremediation; Microorganisms, Activated sludge; Co-cultivation; Kinetic growth; Lipid productions; Micro-algae, Nitrogen removal
%P 216-224
%R 10.1016/j.jtice.2018.03.038
%T Co-cultivation of activated sludge and microalgae for the simultaneous enhancements of nitrogen-rich wastewater bioremediation and lipid production
%U https://khub.utp.edu.my/scholars/10277/
%V 87
%X 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
%Z cited By 63