Trophic mode conversion and nitrogen deprivation of microalgae for high ammonium removal from synthetic wastewater

Jinghan Wang; Wenguang Zhou; Haizhen Yang; Feng Wang; Roger Ruan

doi:10.1016/j.biortech.2015.08.036

Trophic mode conversion and nitrogen deprivation of microalgae for high ammonium removal from synthetic wastewater

Jinghan Wang, Wenguang Zhou, Haizhen Yang, Feng Wang, Roger Ruan

Bioproducts and Biosystems Engineering

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

In this study, a well-controlled three-stage process was proposed for high ammonium removal from synthetic wastewater using selected promising microalgal strain UMN266. Three trophic modes (photoautotrophy, heterotrophy, and mixotrophy), two N sufficiency conditions (N sufficient and N deprived), two inoculum modes (photoautotrophic and heterotrophic), and different NH₄⁺-N concentrations were compared to investigate the effect of trophic mode conversion and N deprivation on high NH₄⁺-N removal by UMN266. Results showed that photoautotrophic inoculum with trophic mode conversion from heterotrophy to photoautotrophy and N deprivation in Stage 2 turned was the optimum plan for NH₄⁺-N removal, and average removal rates were 12.4 and 19.1mg/L/d with initial NH₄⁺-N of 80 and 160mg/L in Stage 3. Mechanism investigations based on algal biomass carbon (C) and N content, cellular composition, and starch content confirmed the above optimum plan and potential of UMN266 as bioethanol feedstock.

Original language	English (US)
Pages (from-to)	668-676
Number of pages	9
Journal	Bioresource Technology
Volume	196
DOIs	https://doi.org/10.1016/j.biortech.2015.08.036
State	Published - Nov 1 2015

Bibliographical note

Funding Information:
The study was in part supported by Grants from the Legislative-Citizen Commission on Minnesota Resources (LCCMR) , University of Minnesota MNDrive Program , University of Minnesota Center for Biorefining , and China MOST Projects ( 2012AA021704 ), NSF of China (Grant 21177067 ), and China International Cooperation Projects ( 2010DFB63750 ).

Publisher Copyright:
© 2015 Elsevier Ltd.

Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.

Keywords

Ammonium removal
Microalgae
Nitrogen deprivation
Nitrogen starvation
Trophic mode conversion

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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abstract = "In this study, a well-controlled three-stage process was proposed for high ammonium removal from synthetic wastewater using selected promising microalgal strain UMN266. Three trophic modes (photoautotrophy, heterotrophy, and mixotrophy), two N sufficiency conditions (N sufficient and N deprived), two inoculum modes (photoautotrophic and heterotrophic), and different NH4+-N concentrations were compared to investigate the effect of trophic mode conversion and N deprivation on high NH4+-N removal by UMN266. Results showed that photoautotrophic inoculum with trophic mode conversion from heterotrophy to photoautotrophy and N deprivation in Stage 2 turned was the optimum plan for NH4+-N removal, and average removal rates were 12.4 and 19.1mg/L/d with initial NH4+-N of 80 and 160mg/L in Stage 3. Mechanism investigations based on algal biomass carbon (C) and N content, cellular composition, and starch content confirmed the above optimum plan and potential of UMN266 as bioethanol feedstock.",

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AU - Wang, Feng

AU - Ruan, Roger

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Y1 - 2015/11/1

N2 - In this study, a well-controlled three-stage process was proposed for high ammonium removal from synthetic wastewater using selected promising microalgal strain UMN266. Three trophic modes (photoautotrophy, heterotrophy, and mixotrophy), two N sufficiency conditions (N sufficient and N deprived), two inoculum modes (photoautotrophic and heterotrophic), and different NH4+-N concentrations were compared to investigate the effect of trophic mode conversion and N deprivation on high NH4+-N removal by UMN266. Results showed that photoautotrophic inoculum with trophic mode conversion from heterotrophy to photoautotrophy and N deprivation in Stage 2 turned was the optimum plan for NH4+-N removal, and average removal rates were 12.4 and 19.1mg/L/d with initial NH4+-N of 80 and 160mg/L in Stage 3. Mechanism investigations based on algal biomass carbon (C) and N content, cellular composition, and starch content confirmed the above optimum plan and potential of UMN266 as bioethanol feedstock.

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Trophic mode conversion and nitrogen deprivation of microalgae for high ammonium removal from synthetic wastewater

Abstract

Bibliographical note

Keywords

UN SDGs

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