Comparison of sludge drainage technologies with oil characteristics
DOI:
https://doi.org/10.6008/CBPC2179-6858.2022.004.0016Keywords:
Sludge, Wastewater treatment, Sludge dewateringAbstract
Sludge is the main by-product generated in industrial effluent treatment plants and represents a high cost for system operation due to the large volume generated, the need for treatment and destination. The choice of treatment technique depends on the characteristics of the sludge, which result from the type of effluent, the treatment process adopted at the stations and the chemical products used. From these characteristics it is possible to determine the best way to treat it. This work aimed to use a natural technique, gravitational dewatering using geotextiles, and a mechanized, pilot scale dewatering press for dewatering sludge from industrial effluent treatment plant with oily characteristics. The research was divided into phases, the first was the choice of the research sample and data collection, in the second stage the pilot projects were defined, built and tested and, finally, the obtained data was evaluated. Gravitational dewatering with geotextiles showed satisfactory results, however, to choose the best technique, other aspects must be considered in addition to volume reduction, such as operation and implantation cost, necessary area, cost with final destination, risks inherent to transport, time required for draining and energy consumption by the system. By scoring and comparing these criteria, the dewatering press was more efficient.
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