Full metadata
Title
Phosphorus recovery from microbial biofuel residual using microwave peroxide digestion and anion exchange
Description
Sustainable production of microalgae for biofuel requires efficient phosphorus (P) utilization, which is a limited resource and vital for global food security. This research tracks the fate of P through biofuel production and investigates P recovery from the biomass using the cyanobacterium Synechocystis sp. PCC 6803. Our results show that Synechocystis contained 1.4% P dry weight. After crude lipids were extracted (e.g., for biofuel processing), 92% of the intracellular P remained in the residual biomass, indicating phospholipids comprised only a small percentage of cellular P. We estimate a majority of the P is primarily associated with nucleic acids. Advanced oxidation using hydrogen peroxide and microwave heating released 92% of the cellular P into orthophosphate. We then recovered the orthophosphate from the digestion matrix using two different types of anion exchange resins. One resin impregnated with iron nanoparticles adsorbed 98% of the influent P through 20 bed volumes, but only released 23% during regeneration. A strong-base anion exchange resin adsorbed 87% of the influent P through 20 bed volumes and released 50% of it upon regeneration. This recovered P subsequently supported growth of Synechocystis. This proof-of-concept recovery process reduced P demand of biofuel microalgae by 54%.
Date Created
2015-03-01
Contributors
- Gifford, McKay (Author)
- Liu, Jianyong (Author)
- Rittmann, Bruce (Author)
- Vannela, Raveender (Author)
- Westerhoff, Paul (Author)
- Ira A. Fulton Schools of Engineering (Contributor)
- School of Sustainable Engineering and the Built Environment (Contributor)
- Biodesign Institute (Contributor)
- Swette Center for Environmental Biotechnology (Contributor)
Resource Type
Extent
32 pages
Language
eng
Copyright Statement
In Copyright
Primary Member of
Identifier
Digital object identifier: 10.1016/j.watres.2014.11.052
Identifier Type
International standard serial number
Identifier Value
0043-1354
Identifier Type
International standard serial number
Identifier Value
1879-2448
Series
WATER RESEARCH
Handle
https://hdl.handle.net/2286/R.I.29361
Preferred Citation
Gifford, McKay, Liu, Jianyong, Rittmann, Bruce E., Vannela, Raveender, & Westerhoff, Paul (2015). Phosphorus recovery from microbial biofuel residual using microwave peroxide digestion and anion exchange. WATER RESEARCH, 70, 130-137. http://dx.doi.org/10.1016/j.watres.2014.11.052
Level of coding
minimal
Cataloging Standards
Note
NOTICE: this is the author's version of a work that was accepted for publication in WATER RESEARCH. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in WATER RESEARCH, 70, 130-137. DOI: 10.1016/j.watres.2014.11.052
System Created
- 2015-05-05 10:32:59
System Modified
- 2021-08-16 02:23:30
- 3 years 2 months ago
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