Screening of the dominant Chlorella pyrenoidosa for biofilm attached culture and feed production while treating swine wastewater. (December 2020)

• Record Type: Journal Article
• Authors: Cheng, Pengfei; Chu, Ruirui; Zhang, Xuezhi; Song, Lirong; Chen, Dongjie; Zhou, Chengxu; Yan, Xiaojun; Cheng, Jay J.; Ruan, Roger
• Is Part Of: Bioresource technology. Volume 318(2020)
• Publication Date: 2020-12
• Subjects: Chlorella pyrenoidosa -- Biofilm attached culture -- Anaerobically digested swine wastewater -- Nutritional components -- Essential amino acid -- Feed addition; 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.2020.124054
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: 12 microalgae were tested for ADSW treatment and C. pyrenoidosa performed the best. Pollutants affected the growth and nutrients removal of algae based-biofilm culture. The highest EAA/NEAA values were 0.64 with the culture of 5-fold diluted ADSW. AA composition of C. pyrenoidosa in ADSW was obtained for the first time. C. pyrenoidosa 36 from biofilm attached culture can be used as feed additive. Abstract: This research 12 microalgal species were screened for biofilm attached culture in the treatment of anaerobically digested swine wastewater (ADSW). The influence of ADSW on biomass productivity and removal efficiencies were evaluated using biofilm attached culture with the selected Chlorella pyrenoidosa . The variation of nutritional components from algal cells were further analysed to evaluate the potential applications of C. pyrenoidosa . The results showed that C. pyrenoidosa had the highest tolerance to ADSW, and the highest removal efficiencies for wastewater pollutants were reached when cultured in 5 times diluted ADSW. These test conditions resulted in an algal cell biomass composed of 57.30% proteins, 14.87% extracellular polysaccharide, 3.08% crude fibre, 5.57% crude ash, 2.85% moisture. Amino acids in proteins contained 21.73% essential amino acids and the EAA/NEAA value was 0.64. The essential amino acid score indicates that the selected C . pyrenoidosa could be a good protein source for feed addition.