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Bioresour Technol. 2016 May;207:19-23. doi: 10.1016/j.biortech.2016.02.001. Epub 2016 Feb 8.

Microalgal growth in municipal wastewater treated in an anaerobic moving bed biofilm reactor.

Author information

1
Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Alnarp, Sweden. Electronic address: Malin.Hultberg@slu.se.
2
AnoxKaldnes, Veolia Water Treatment Technologies AB, Lund, Sweden.
3
Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Alnarp, Sweden.
4
Ekoll AB, Malmö, Sweden.
5
Norups Gård Bioraff AB, Knislinge, Sweden.

Abstract

Nutrient removal from the effluent of an anaerobic moving bed biofilm reactor (AnMBBR) treated with microalgae was evaluated. Algal treatment was highly efficient in removal of nutrients and discharge limits were met after 3days. Extending the cultivation time from 3 to 5days resulted in a large increase in biomass, from 233.3±49.3 to 530.0±72.1mgL(-1), despite nutrients in the water being exhausted after 3days (ammonium 0.04mgL(-1), orthophosphate <0.05mgL(-1)). Biomass productivity, lipid content and quality did not differ in microalgal biomass produced in wastewater sampled before the AnMBBR. The longer cultivation time resulted in a slight increase in total lipid concentration and a significant decrease in linolenic acid concentration in all treatments. Differences were observed in chemical oxygen demand, which decreased after algal treatment in wastewater sampled before the AnMBBR whereas it increased after algal treatment in the effluent from the AnMBBR.

KEYWORDS:

AnMBBR; Chlorella spp.; Fatty acids; Nutrient removal; Scenedesmus spp.

PMID:
26868151
DOI:
10.1016/j.biortech.2016.02.001
[Indexed for MEDLINE]

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