Application of nitrogen sufficiency conversion strategy for microalgae-based ammonium-rich wastewater treatment

Ammonium ([Formula: see text]-N)-rich wastewater, a main cause for eutrophication, can serve as a promising medium for fast microalgae cultivation with efficient [Formula: see text]-N removal. To achieve this goal, a well-controlled three-stage treatment process was developed. Two trophic modes (mix...

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Veröffentlicht in:Environmental technology. - 1993. - 37(2016), 20 vom: 15. Okt., Seite 2638-48
1. Verfasser: Wang, Jinghan (VerfasserIn)
Weitere Verfasser: Zhou, Wenguang, Yang, Haizhen, Ruan, Roger
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2016
Zugriff auf das übergeordnete Werk:Environmental technology
Schlagworte:Journal Article Nitrogen sufficiency conversion ammonium-rich wastewater microalgae mixotrophic cultivation three-stage process Ammonium Compounds Biofuels Waste Water Water Pollutants, Chemical mehr... Nitrogen N762921K75
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520 |a Ammonium ([Formula: see text]-N)-rich wastewater, a main cause for eutrophication, can serve as a promising medium for fast microalgae cultivation with efficient [Formula: see text]-N removal. To achieve this goal, a well-controlled three-stage treatment process was developed. Two trophic modes (mixotrophy and heterotrophy) in Stage 1 and Stage 2, with two nitrogen availability conditions (N sufficient and N deprived) in Stage 2, and different [Formula: see text]-N concentrations in Stage 3 were compared to investigate the effects of nitrogen sufficiency conversion on indigenous strain UMN266 for [Formula: see text]-N removal. Results showed that mixotrophic cultures in the first two stages with N deprivation in Stage 2 was the optimum treatment strategy, and higher [Formula: see text]-N concentration in Stage 3 facilitated both microalgal growth and [Formula: see text]-N removal, with average and maximum biomass productivity of 55.3 and 161.0 mg L(-1) d(-1), and corresponding removal rates of 4.2 and 15.0 mg L(-1) d(-1), respectively, superior to previously published results. Observations of intracellular compositions confirmed the optimum treatment strategy, discovering excellent starch accumulating property of strain UMN266 as well. Combination of bioethanol production with the proposed three-stage process using various real wastewater streams at corresponding stages was suggested for future application 
650 4 |a Journal Article 
650 4 |a Nitrogen sufficiency conversion 
650 4 |a ammonium-rich wastewater 
650 4 |a microalgae 
650 4 |a mixotrophic cultivation 
650 4 |a three-stage process 
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650 7 |a Biofuels  |2 NLM 
650 7 |a Waste Water  |2 NLM 
650 7 |a Water Pollutants, Chemical  |2 NLM 
650 7 |a Nitrogen  |2 NLM 
650 7 |a N762921K75  |2 NLM 
700 1 |a Zhou, Wenguang  |e verfasserin  |4 aut 
700 1 |a Yang, Haizhen  |e verfasserin  |4 aut 
700 1 |a Ruan, Roger  |e verfasserin  |4 aut 
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