Biocapture of CO 2 by Different Microalgal-Based Technologies for Biogas Upgrading and Simultaneous Biogas Slurry Purification under Various Light Intensities and Photoperiods

Pengfei Guo, Yuejin Zhang and Yongjun Zhao
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Pengfei Guo: Qin Tan (Shanghai) Environmental Engineering Co. Ltd., Shanghai 200232, China
Yuejin Zhang: College of Biological Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China
Yongjun Zhao: College of Biological Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China

IJERPH, 2018, vol. 15, issue 3, 1-18

Abstract: Co-cultivation of microalgae and microbes for pollutant removal from sewage is considered as an effective wastewater treatment method. The aim of this study is to screen the optimal photoperiod, light intensity and microalgae co-cultivation method for simultaneously removing nutrients in biogas slurry and capturing CO 2 in biogas. The microalgae–fungi pellets are deemed to be a viable option because of their high specific growth rate and nutrient and CO 2 removal efficiency under the photoperiod of 14 h light:10 h dark. The order of both the biogas slurry purification and biogas upgrading is ranked the same, that is Chlorella vulga ris – Ganoderma lucidum > Chlorella vulga ris –activated sludge > Chlorella vulgaris under different light intensities. For all cultivation methods, the moderate light intensity of 450 μmol m −2 s −1 is regarded as the best choice. This research revealed that the control of photoperiod and light intensity can promote the biological treatment process of biogas slurry purification and biogas upgrading using microalgal-based technology.

Keywords: biogas upgrading; co-cultivation; CO2 removal; light intensities; photoperiods (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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