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Title: Recycling of Nutrients from Dairy Wastewater by Extremophilic Microalgae with High Ammonia Tolerance

Abstract

This study explored the possibility of incorporating extremophilic algal cultivation into dairy wastewater treatment by characterizing a unique algal strain. Results showed that extremophilic microalgae Chlorella vulgaris CA1 newly isolated from dairy wastewater tolerated a high level of ammonia nitrogen (2.7 g/L), which was over 20 times the ammonia nitrogen that regular Chlorella sp. could tolerate. The isolate was mixotrophically cultured in dairy effluent treated by anaerobic digestion (AD) for recycling nutrients and polishing the wastewater. The highest biomass content of 13.3 g/L and protein content of 43.4% were achieved in the culture in AD effluent. Up to 96% of the total nitrogen and 79% of the total phosphorus were removed from the dairy AD effluent. The ability of the algae to tolerate a high level of ammonia nitrogen suggests the potential for direct nutrient recycling from dairy wastewater while producing algal biomass and high value bioproducts.

Authors:
ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [2];  [3];  [1]
  1. Washington State Univ., Pullman, WA (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Northwest A & F Univ., Shaanxi (China)
Publication Date:
Research Org.:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Bioenergy Technologies Office (BETO)
OSTI Identifier:
1755727
Report Number(s):
NREL/JA-2800-78276
Journal ID: ISSN 0013-936X; MainId:32193;UUID:39a7df61-863d-4f5c-9880-dac8c48a4774;MainAdminID:19052
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
Environmental Science and Technology
Additional Journal Information:
Journal Volume: 54; Journal Issue: 23; Journal ID: ISSN 0013-936X
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Chlorella vulgaris CA1; dairy wastewater treatment; mixotrophic culture; ammonia nitrogen tolerance; protein-rich biomass; nutrient removal

Citation Formats

Pang, Na, Bergeron, Andre David, Gu, Xiangyu, Fu, Xiao, Dong, Tao, Yao, Yiqing, and Chen, Shulin. Recycling of Nutrients from Dairy Wastewater by Extremophilic Microalgae with High Ammonia Tolerance. United States: N. p., 2020. Web. doi:10.1021/acs.est.0c02833.
Pang, Na, Bergeron, Andre David, Gu, Xiangyu, Fu, Xiao, Dong, Tao, Yao, Yiqing, & Chen, Shulin. Recycling of Nutrients from Dairy Wastewater by Extremophilic Microalgae with High Ammonia Tolerance. United States. https://doi.org/10.1021/acs.est.0c02833
Pang, Na, Bergeron, Andre David, Gu, Xiangyu, Fu, Xiao, Dong, Tao, Yao, Yiqing, and Chen, Shulin. Sun . "Recycling of Nutrients from Dairy Wastewater by Extremophilic Microalgae with High Ammonia Tolerance". United States. https://doi.org/10.1021/acs.est.0c02833. https://www.osti.gov/servlets/purl/1755727.
@article{osti_1755727,
title = {Recycling of Nutrients from Dairy Wastewater by Extremophilic Microalgae with High Ammonia Tolerance},
author = {Pang, Na and Bergeron, Andre David and Gu, Xiangyu and Fu, Xiao and Dong, Tao and Yao, Yiqing and Chen, Shulin},
abstractNote = {This study explored the possibility of incorporating extremophilic algal cultivation into dairy wastewater treatment by characterizing a unique algal strain. Results showed that extremophilic microalgae Chlorella vulgaris CA1 newly isolated from dairy wastewater tolerated a high level of ammonia nitrogen (2.7 g/L), which was over 20 times the ammonia nitrogen that regular Chlorella sp. could tolerate. The isolate was mixotrophically cultured in dairy effluent treated by anaerobic digestion (AD) for recycling nutrients and polishing the wastewater. The highest biomass content of 13.3 g/L and protein content of 43.4% were achieved in the culture in AD effluent. Up to 96% of the total nitrogen and 79% of the total phosphorus were removed from the dairy AD effluent. The ability of the algae to tolerate a high level of ammonia nitrogen suggests the potential for direct nutrient recycling from dairy wastewater while producing algal biomass and high value bioproducts.},
doi = {10.1021/acs.est.0c02833},
journal = {Environmental Science and Technology},
number = 23,
volume = 54,
place = {United States},
year = {Sun Nov 15 00:00:00 EST 2020},
month = {Sun Nov 15 00:00:00 EST 2020}
}

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