Ultraviolet radiation pre-treatment of wastewater, improving its utility for algal cultivation
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United States of America Patent
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Feb 16, 2021
Grant Date -
Oct 1, 2015
app pub date -
Mar 25, 2015
filing date -
Mar 25, 2014
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Abstract
The present invention relates to a process of remediating wastewaters, preferably agricultural wastewaters resulting from animal production or contained animal feeding operation sites. The water is treated to promote assimilation of nutrients into algal biomass, which can be harvested and sold, and the resultant wastewater is then purified. According to the invention, short wavelength UV radiation (less than 280 nm wavelength) is used to pretreat wastewater, with the dose determined by absorbance of the water, not by bacterial load. Pretreated water exhibits changes in chromophoric dissolved organic matter that allows for improved and increased algae production by as much as 88%.
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