Influence of influent methane concentration on biogas upgrading and biogas slurry purification under various LED (light-emitting diode) light wavelengths using Chlorella sp

Cheng Yan, Li Zhang, Xingzhang Luo and Zheng Zheng

Energy, 2014, vol. 69, issue C, 419-426

Abstract: Raw biogas is a valuable renewable energy but usually requires upgrading. The mixed LED (light-emitting diode) light wavelengths achieved much better microalgae growth than that of the monochromatic. The best LED light wavelength mix ratio for both biogas upgrading and biogas slurry nutrient removal was the red:blue ratio of 5:5. Lower influent CH4 (methane) concentration achieved higher biogas slurry nutrient removal efficiency, whereas moderate influent CH4 concentration achieved the best biogas upgrading effect. Therefore the optimal parameters were determined to lie between the low and moderate influent CH4 concentrations and the mixed red:blue ratio of 5:5 LED light wavelengths. They achieved the best biogas upgrading and biogas slurry nutrient purification effects with the following values: 92.60 ± 2.24% (v/v) of upgraded biogas CH4 concentration, 85.73 ± 4.26% of chemical oxygen demand removal efficiency, 73.21 ± 2.51% of total nitrogen removal efficiency, and 73.89 ± 4.82% total phosphorus removal efficiency.

Keywords: Chlorella sp.; Biogas upgrading; Methane; Biogas slurry; Light-emitting diode (search for similar items in EconPapers)
Date: 2014
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544214002989
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:69:y:2014:i:c:p:419-426

DOI: 10.1016/j.energy.2014.03.034

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().