Simultaneous nutrient removal and biomass/lipid production by Chlorella sp. in seafood processing wastewater

The Science of the Total Environment
Feng GaoYuan-Ming Guo

Abstract

Microalgae cultivation in wastewater has received increasing attention in recent years due to its many advantages. In this work, microalgae were cultured in seafood processing wastewater (SPW) for algal biomass and lipid production as well as nutrient removal. The biomass yield of Chlorella sp. achieved in the batch cultivation was 896 mg L-1, indicating that SPW contains a certain amount of nutrients which can be used for the growth of microalgae. However, the maximum specific growth rate of Chlorella sp. cultured in SPW throughout the whole cultivation period was only 0.040 d-1, suggesting that the growth of algal cells was inhibited during the culture process. High concentration of unionized ammonia in the SPW was found to be a factor inhibiting the growth of Chlorella sp. Aerated SPW (ASPW) and diluted SPW (DSPW) proved to be better culture media than SPW without pretreatment. The maximum specific growth rates of Chlorella sp. cultured in ASPW and DSPW during the culture interval were 0.156 and 0.091 d-1, respectively. Aeration pretreatment of SPW reduced the amount of toxic unionized ammonia, while most of the nutrients were retained in the wastewater. Therefore, higher biomass productivity (77.7 mg L-1 d-1) and higher lip...Continue Reading

Citations

Aug 8, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Val S FrenkelWalter Z Tang
Jul 3, 2021·International Journal of Environmental Research and Public Health·Deborah PanepintoMariachiara Zanetti
Nov 14, 2021·World Journal of Microbiology & Biotechnology·Xiaomiao TanMinato Wakisaka

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