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Microalgae cultivation using an aquaculture wastewater as growth medium for biomass and biofuel production |
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| Authors: | Zhen Guo Yuan Liu Haiyan Guo Song Yan Jun Mu |
| Institution: | 1. Department of Civil & Environmental Engineering, University of South Florida, 4202 E. Fowler Ave., ENB 118, Tampa, FL 33620, United States;2. Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, P.O. Box 5003, N-1432 Ås, Norway;3. Dept. of Mathematical Sciences and Technology, Norwegian University of Life Sciences, P.O. Box 5003, N-1432 Ås, Norway;1. Laboratorio de Microbiología Experimental, Departamento de Biología, Facultad de Química, UNAM, Av. Universidad No. 3000, Col. Universidad, Nacional Autónoma de México C.U., Delegación Coyoacán, C.P. 04510 Ciudad de México, México, Mexico;2. Laboratorio de Ingeniería Ambiental, Edificio 5, Instituto de Ingeniería, UNAM, Mexico;3. Laboratorio 212, Departamento de Ingeniería Química, Conjunto E. Facultad de Química, UNAM, Mexico |
| Abstract: | Microalgae as a main feedstock has attracted much attention in recent years but is still not economically feasible due to high algal culture cost. The objective of this study was to develop a comprehensive eco-friendly technology for cultivating microalgae Platymonas subcordiformis using aquaculture wastewater as growth medium for biomass and biofuel production. Platymonas subcordiformis was grown in pretreated flounder aquaculture wastewaters taken from different stages. Each of wastewater contained different levels of nutrients. The biomass yield of microalgae and associated nitrogen and phosphorous removal were investigated. The results showed that algal cell density increased 8.9 times than the initial level. Platymonas subcordiformis removed nitrogen and phosphorus from wastewater with an average removal efficiency of 87%–95% for nitrogen and 98%–99% for phosphorus. It was feasible to couple the removal of nitrogen and phosphorus from wastewater to algal biomass and biofuel production. However, further studies are required to make this technologies economically viable for algae biofuel production. |
| Keywords: | microalgae wastewater treatment nitrogen and phosphorus removal biomass |
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