Journal article
Recycling of Nutrients from Dairy Wastewater by Extremophilic Microalgae with High Ammonia Tolerance
Environmental science & technology, Vol.54(23), pp.15366-15375
12/01/2020
Handle:
https://hdl.handle.net/2376/111726
PMID: 33190494
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.
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Details
- Title
- Recycling of Nutrients from Dairy Wastewater by Extremophilic Microalgae with High Ammonia Tolerance
- Creators
- Na Pang - Department of Biological Systems EngineeringAndre David Bergeron - Department of Biological Systems EngineeringXiangyu Gu - Gene and Linda Voiland School of Chemical Engineering and BioengineeringXiao Fu - Department of Biological Systems EngineeringTao Dong - Renewable Resources and Enabling Sciences CenterYiqing Yao - Northwest A&F UniversityShulin Chen - Department of Biological Systems Engineering
- Publication Details
- Environmental science & technology, Vol.54(23), pp.15366-15375
- Academic Unit
- Biological Systems Engineering, Department of
- Publisher
- American Chemical Society
- Identifiers
- 99900583061601842
- Language
- English
- Resource Type
- Journal article