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    題名: Co-cultivation of activated sludge and microalgae for the simultaneous enhancements of nitrogen-rich wastewater bioremediation and lipid production
    作者: Wai-Hong Leong;Jun-Wei Lim;Man-Kee Lam;Yoshimitsu Uemura;Chii-Dong Ho;Yeek-Chia Ho
    關鍵詞: Co-cultivation;Activated sludge;Microalgae;Nitrogen removal;Lipid production;Kinetic growth
    日期: 2018-06
    上傳時間: 2018-05-17 12:10:55 (UTC+8)
    出版者: Elsevier
    摘要: 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.
    關聯: Journal of the Taiwan Institute of Chemical Engineers 87, p.216-224
    DOI: 10.1016/j.jtice.2018.03.038
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文


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