Cultivation of Chlorella sp. GD using piggery wastewater for biomass and lipid production. (October 2015)

• Record Type: Journal Article
• Authors: Kuo, Chiu-Mei; Chen, Tsai-Yu; Lin, Tsung-Hsien; Kao, Chien-Ya; Lai, Jinn-Tsyy; Chang, Jo-Shu; Lin, Chih-Sheng
• Is Part Of: Bioresource technology. Volume 194(2015)
• Page Start: 326
• Page End: 333
• Publication Date: 2015-10
• Subjects: Microalgae -- Wastewater -- Semi-continuous culture -- Biomass -- Lipid; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2015.07.026
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Piggery wastewater was able to be directly used for Chlorella sp. GD cultivation. The maximum specific growth rate of Chlorella sp. GD with 100% piggery wastewater was 0.839 d −1 . The biomass and lipid productivity of Chlorella sp. GD was enhanced in a semi-continuous culture. Stable growth performance for long-term microalgal cultivation in semi-continuous operations is promising. Abstract: The development of a culture system for Chlorella sp. GD to efficiently produce biomass and oil for biodiesel production was investigated. Chlorella sp. GD was cultivated with 0%, 25%, 50%, 75% and 100% piggery wastewater (diluted by medium) at 300 μmol m −2 s −1, a 2% CO2 aeration rate of 0.2 vvm and 26 ± 1 °C; after a 10-day culture in batch cultures, the maximum specific growth rate and biomass productivity of the microalga obtained in 100% piggery wastewater were 0.839 d −1 and 0.681 g L −1 d −1, respectively. The highest lipid content and lipid productivity were 29.3% and 0.155 g L −1 d −1 at 25% wastewater, respectively. In semi-continuous cultures, the biomass and lipid productivities with 25–75% wastewater ratios were greater than 0.852 and 0.128 g L −1 d −1, respectively. These results show that Chlorella sp. GD grows efficiently in piggery wastewater, and that a stable growth performance was achieved for long-term microalgal cultivation in a semi-continuous culture.