Comparison of batch cultivation strategies for cost-effective biomass production of Micractinium inermum NLP-F014 using a blended wastewater medium. (June 2017)

• Record Type: Journal Article
• Authors: Park, Seonghwan; Kim, Jeongmi; Park, Younghyun; Son, Suyoung; Cho, Sunja; Kim, Changwon; Lee, Taeho
• Is Part Of: Bioresource technology. Volume 234(2017)
• Page Start: 432
• Page End: 438
• Publication Date: 2017-06
• Subjects: Microalgae -- Blended wastewater medium -- Fed-batch cultivation -- Sequencing-batch cultivation -- Biomass productivity; 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.2017.03.074
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: A valuable strategy for cost-effective production of M. inermum was determined. Two batch cultivation strategies, fed-batch and sequencing-batch mode, were tested. Culture medium was a mixture of domestic WW and aerobically digested swine WW. The highest biomass productivity was obtained from the sequencing-batch mode. The sequencing-batch mode also showed low environmental impacts. Abstract: Two competitive strategies, fed-batch and sequencing-batch cultivation, were compared in cost-effective biomass production of a high lipid microalgae, Micractinium inermum NLP-F014 using a blended wastewater medium. For fed-batch cultivations, additional nutrient was supplemented at day 2 (FB1) or consecutively added at day 2 and 4 (FB2). Through inoculum size test, 1.0 g-DCW L −1 was selected for the sequencing-batch cultivation (SB) where about 65% of culture was replaced with fresh medium every 2 days. Both fed-batch cultivations showed the maximum biomass productivity of 0.95 g-DCW L −1 d −1, while average biomass productivity in SB was slightly higher as 0.96 ± 0.08 g-DCW L −1 d −1 . Furthermore, remained concentrations of organics (426 mg-COD L −1 ), total nitrogen (15.4 mg-N L −1 ) and phosphorus (0.6 mg-P L −1 ) in SB were much lower than those of fed-batch conditions. The results suggested that SB could be a promising strategy to cultivate M. inermum NLP-F014 with the blended wastewater medium.