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Environ Technol. 2018 Jun;39(11):1422-1429. doi: 10.1080/09593330.2017.1330901. Epub 2017 May 27.

Coupled microalgal cultivation with the treatment of domestic sewage and high-level CO2.

Author information

1
a School of Environmental Science and Engineering , Shandong University , Jinan , People's Republic of China.
2
b Shandong Provincial Engineering Centre on Environmental Science and Technology , Jinan , People's Republic of China.

Abstract

The ability of Scenedesmus quadricauda SDEC-13 to accumulate biomass and remove nutrients in domestic sewage from campus when incorporated with 15% CO2 was explored. The maximum specific growth rate, biomass productivity, biomass concentration, and CO2 fixation rate were 0.14 d-1, 0.08 g/L/d, 0.69 g/L, and 0.076 g-CO2/L/d, respectively. The lipid content of SDEC-13 at different culture phases was also evaluated and it increased following nutrient limitation. The removal efficiencies of total nitrogen, total phosphorus, nitrate, and ammonium were all above 90%. A coupled system was designed with hydraulic retention time of 8.33 d and biomass harvest ratio of 12%, which could yield 0.54 g/L biomass and 25% lipid content with efficient domestic sewage treatment.

KEYWORDS:

Scenedesmus quadricauda; CO2 fixation rate; coupled system; domestic sewage; nutrient limitation

PMID:
28504059
DOI:
10.1080/09593330.2017.1330901
[Indexed for MEDLINE]

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