Biofiltration of wastewater from rice industries in San Jacinto de Yaguachi, Ecuador using rice husks
DOI:
https://doi.org/10.46380/rias.vol5.e271Keywords:
activated carbon, carbonization, circular economy, environmental pollution, eutrophication, total solidsAbstract
It is estimated that in the world more than 80% of wastewater generated by anthropogenic activities is discharged directly into the environment. The discharge of these waters is a problem still unresolved in cities, and therefore economic technologies are required to be implemented at the domestic level. Given this problem, the present work aimed to evaluate the efficiency of a biofilter using activated carbon and ash substrates (produced from rice husks) for the treatment of domestic wastewater. The activation of the substrates was carried out by means of physicochemical processes at temperatures of 450 °C and with the use of phosphoric acid. As a result of the biofiltration of the wastewater, the ash allowed a true color (Pt-Co) removal of up to 99%. Activated carbon reduced turbidity up to 95.3%; while the content of total solids was practically not decreased by any of the substrates. This research is linked to the circular economy, given the use of a production residue such as rice husk.
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