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J Environ Manage. 2015 Aug 15;159:115-120. doi: 10.1016/j.jenvman.2015.05.037. Epub 2015 Jun 7.

Mixotrophic cultivation of a microalga Scenedesmus obliquus in municipal wastewater supplemented with food wastewater and flue gas CO2 for biomass production.

Author information

1
Green City Technology Institute, Korea Institute of Science and Technology, Seoul 136-791, South Korea.
2
Department of Natural Resources and Environmental Engineering, Hanyang University, Seoul 133-791, South Korea.
3
Green City Technology Institute, Korea Institute of Science and Technology, Seoul 136-791, South Korea. Electronic address: jchoi@kist.re.kr.

Abstract

The biomass and lipid/carbohydrate production by a green microalga Scenedesmus obliquus under mixotrophic condition using food wastewater and flue gas CO2 with municipal wastewater was investigated. Different dilution ratios (0.5-2%) of municipal wastewater with food wastewater were evaluated in the presence of 5, 10 and 14.1% CO2. The food wastewater (0.5-1%) with 10-14.1% CO2 supported the highest growth (0.42-0.44 g L(-1)), nutrient removal (21-22 mg TN L(-1)), lipid productivity (10-11 mg L(-1)day(-1)) and carbohydrate productivity (13-16 mg L(-1)day(-1)) by S. obliquus after 6 days of cultivation. Food wastewater increased the palmitic and oleic acid contents up to 8 and 6%, respectively. Thus, application of food wastewater and flue gas CO2 can be employed for enhancement of growth, lipid/carbohydrate productivity and wastewater treatment efficiency of S. obliquus under mixotrophic condition, which can lead to development of a cost effective strategy for microalgal biomass production.

KEYWORDS:

Bio-energy; Biomass; Flue gas CO(2); Food wastewater; Scenedesmus obliquus

PMID:
26063515
DOI:
10.1016/j.jenvman.2015.05.037
[Indexed for MEDLINE]

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