Abstract
The potential of algal–bacterial symbiosis for the removal of carbon, nitrogen and phosphorus from five agro-industrial wastewaters was investigated in enclosed batch biodegradation tests using a mixed microalgae consortium and activated sludge as model microorganisms. The target wastewaters were obtained from potato processing (PW), fish processing (FW), animal feed production (MW), coffee manufacturing (CW) and yeast production (YW). The initial C/N/P ratio of the agro-industrial wastewater was correlated with its biodegradability. Thus, the highest removals of total organic carbon (TOC) and nitrogen were recorded in two fold diluted FW (64 ± 2 % and 85 ± 1 %, respectively), while the maximum P-PO4 3− removal achieved was 89 ± 1 % in undiluted PW. The biodegradable TOC was in most cases the limiting component in the treatment of the wastewaters evaluated. This study confirmed the potential of coupling carbon and nutrient recovery from agro-industrial effluents with the production of a valuable algal–bacterial biomass, despite their poor biodegradability.
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Acknowledgments
This research was financially supported by INIA through the Institute of Agriculture Technology of Castilla y León (Project Ref RTA2010-00087-C02-02) by the Ministry of Economy and Competitiveness (CONSOLIDER-CSD 2007-00055) and the Regional Government of Castilla y Leon (GR76). Araceli Crespo, Sara Santamarta, Silvia Arranz and Jose María Bueno are also gratefully acknowledged for their practical assistance.
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Posadas, E., Bochon, S., Coca, M. et al. Microalgae-based agro-industrial wastewater treatment: a preliminary screening of biodegradability. J Appl Phycol 26, 2335–2345 (2014). https://doi.org/10.1007/s10811-014-0263-0
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DOI: https://doi.org/10.1007/s10811-014-0263-0