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Simultaneous remediation of nutrients from liquid anaerobic digestate and municipal wastewater by the microalga Scenedesmus sp. AMDD grown in continuous chemostats.
J Appl Microbiol. 2015 Jan; 118(1):75-83.JA

Abstract

AIMS

The primary aim of this study was to investigate the capacity of a microalga, Scenedesmus sp. AMDD, to remediate nutrients from municipal wastewater, either as the sole nutrient source or after blending with wastewater obtained from the anaerobic digestion of swine manure. A complimentary aim was to study and define the effects of these wastewaters on microalgal growth, biomass productivity and composition which have important implications for a commercial biofuels production system.

METHODS AND RESULTS

A microalga, Scenedesmus sp. AMDD, was grown in continuous chemostats in municipal wastewater or wastewater supplemented with 1·6× or 2·4× higher levels of nitrogen (N) obtained through supplementation with anaerobic digestates. Biomass productivity increased with increasing nutrient supplementation, but was limited by light at high cell densities. Cellular quotas of carbon (C), nitrogen and phosphorus (P) all increased in direct proportion to their concentrations in the combined wastewaters. At higher cell densities, total carbohydrate decreased while protein increased. Fatty acid content remained relatively constant. Under high nutrient levels, the fatty acid profiles contained a higher concentration of polyunsaturated fatty acids at the expense of monounsaturated fatty acids. Chlorophyll a was 2·5 times greater in the treatment of greatest nutrient supplementation compared to the treatment with the least. Ammonium (NH4(+)) and phosphate (PO4(3-)) were completely removed by algal growth in all treatments and with maximal removal rates of 41·2 mg N l(-1) d(-1) and 6·7 mg P l(-1) d(-1) observed in wastewater amended with 2·4× higher N level.

SIGNIFICANCE AND IMPACT OF THE STUDY

The study is the first to report stable, long-term continuous algal growth and productivity obtained by combining wastewaters of different sources. The study is supported by detailed analyses of the composition of the cultivated biomass and links composition to the nutrient and light availabilities in the cultures. Simultaneous remediation of these wastes by algal growth is discussed as a strategy for the valorization of the biomass.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Dickinson KE
Algal Carbon Conversion Flagship Program, Aquatic and Crop Resources Development, National Research Council of Canada, Halifax, N.S., Canada.
Bjornsson WJ
No affiliation info available
Garrison LL
No affiliation info available
Whitney CG
No affiliation info available
Park KC
No affiliation info available
Banskota AH
No affiliation info available
McGinn PJ
No affiliation info available

MeSH

AnaerobiosisAnimalsBiomassEnvironmental Restoration and RemediationFatty AcidsMicroalgaeNitrogenPhosphorusScenedesmusSwineWastewater

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25363842

Citation

Dickinson, K E., et al. "Simultaneous Remediation of Nutrients From Liquid Anaerobic Digestate and Municipal Wastewater By the Microalga Scenedesmus Sp. AMDD Grown in Continuous Chemostats." Journal of Applied Microbiology, vol. 118, no. 1, 2015, pp. 75-83.
Dickinson KE, Bjornsson WJ, Garrison LL, et al. Simultaneous remediation of nutrients from liquid anaerobic digestate and municipal wastewater by the microalga Scenedesmus sp. AMDD grown in continuous chemostats. J Appl Microbiol. 2015;118(1):75-83.
Dickinson, K. E., Bjornsson, W. J., Garrison, L. L., Whitney, C. G., Park, K. C., Banskota, A. H., & McGinn, P. J. (2015). Simultaneous remediation of nutrients from liquid anaerobic digestate and municipal wastewater by the microalga Scenedesmus sp. AMDD grown in continuous chemostats. Journal of Applied Microbiology, 118(1), 75-83. https://doi.org/10.1111/jam.12681
Dickinson KE, et al. Simultaneous Remediation of Nutrients From Liquid Anaerobic Digestate and Municipal Wastewater By the Microalga Scenedesmus Sp. AMDD Grown in Continuous Chemostats. J Appl Microbiol. 2015;118(1):75-83. PubMed PMID: 25363842.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Simultaneous remediation of nutrients from liquid anaerobic digestate and municipal wastewater by the microalga Scenedesmus sp. AMDD grown in continuous chemostats. AU - Dickinson,K E, AU - Bjornsson,W J, AU - Garrison,L L, AU - Whitney,C G, AU - Park,K C, AU - Banskota,A H, AU - McGinn,P J, Y1 - 2014/11/27/ PY - 2014/04/22/received PY - 2014/10/24/revised PY - 2014/10/24/accepted PY - 2014/11/4/entrez PY - 2014/11/5/pubmed PY - 2015/8/20/medline KW - anaerobic digestate KW - biochemical composition KW - chemostat KW - microalgae KW - wastewater SP - 75 EP - 83 JF - Journal of applied microbiology JO - J Appl Microbiol VL - 118 IS - 1 N2 - AIMS: The primary aim of this study was to investigate the capacity of a microalga, Scenedesmus sp. AMDD, to remediate nutrients from municipal wastewater, either as the sole nutrient source or after blending with wastewater obtained from the anaerobic digestion of swine manure. A complimentary aim was to study and define the effects of these wastewaters on microalgal growth, biomass productivity and composition which have important implications for a commercial biofuels production system. METHODS AND RESULTS: A microalga, Scenedesmus sp. AMDD, was grown in continuous chemostats in municipal wastewater or wastewater supplemented with 1·6× or 2·4× higher levels of nitrogen (N) obtained through supplementation with anaerobic digestates. Biomass productivity increased with increasing nutrient supplementation, but was limited by light at high cell densities. Cellular quotas of carbon (C), nitrogen and phosphorus (P) all increased in direct proportion to their concentrations in the combined wastewaters. At higher cell densities, total carbohydrate decreased while protein increased. Fatty acid content remained relatively constant. Under high nutrient levels, the fatty acid profiles contained a higher concentration of polyunsaturated fatty acids at the expense of monounsaturated fatty acids. Chlorophyll a was 2·5 times greater in the treatment of greatest nutrient supplementation compared to the treatment with the least. Ammonium (NH4(+)) and phosphate (PO4(3-)) were completely removed by algal growth in all treatments and with maximal removal rates of 41·2 mg N l(-1) d(-1) and 6·7 mg P l(-1) d(-1) observed in wastewater amended with 2·4× higher N level. SIGNIFICANCE AND IMPACT OF THE STUDY: The study is the first to report stable, long-term continuous algal growth and productivity obtained by combining wastewaters of different sources. The study is supported by detailed analyses of the composition of the cultivated biomass and links composition to the nutrient and light availabilities in the cultures. Simultaneous remediation of these wastes by algal growth is discussed as a strategy for the valorization of the biomass. SN - 1365-2672 UR - https://www.unboundmedicine.com/medline/citation/25363842/Simultaneous_remediation_of_nutrients_from_liquid_anaerobic_digestate_and_municipal_wastewater_by_the_microalga_Scenedesmus_sp__AMDD_grown_in_continuous_chemostats_ DB - PRIME DP - Unbound Medicine ER -