Medium recycling for Nannochloropsis gaditana cultures for aquaculture

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바이오화학분류

- 바이오정밀화학
  1. 용매
  2. 화학제품
  3. 기타
- 화장품용 기능성소재
  1. 기능성
  2. 계면활성제⁄증점제
- 의료용 화학소재
  1. 치료제
  2. 건강보조식품
  3. 식품첨가제

논문

Medium recycling for Nannochloropsis gaditana cultures for aquaculture

학술지

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

저자명

Gonzalez-Lopez, C.V.; Ceron-Garcia, M.C.; Fernandez-Sevilla, J.M.; Gonzalez-Cespedes, A.M.; Camacho-Rodriguez, J.; Molina-Grima, E.

초록

Nannochloropsis gaditana is a good producer of proteins and valuable fatty acids for aquaculture. Recycling of culture medium is interesting for microalgae commercial production as it cuts costs and prevents environmental contamination. The recycled medium must be sterilized to prevent the buildup of unwanted metabolites and microorganisms. We tested several sterilization methods: filtration, ozonation, chlorination, addition of hydrogen peroxide and heating. Results showed that the most successful method is ozonation lowering the bacterial load to 1.910<SUP>3</SUP>CFUs/mL, which is 1000-fold and 10-fold lower than the supernatant obtained after harvesting and the initial filtered medium, respectively. Continuous cultures of N. gaditana were grown using this recirculated supernatant. A maximum biomass productivity of 0.8g/L/d composed of ~50% proteins and 40% lipids with more than 3%d.w. EPA was obtained making this biomass very interesting for aquaculture.

발행연도

2013

발행기관

Elsevier Applied Science

ISSN

0960-8524

권

129

페이지

pp.430-438

DOI

10.1016/j.biortech.2012.11.061