Produção de água em ETA com alteração da carreira de filtração

Abstract

Water treatment plants are designed according to the water quality on source, which directly sets up the treatment technology to be used and consequently influences costs of operation and maintenance. The adequacy of the processes in WTP is primordial for reducing costs and improving the quality of treated water. The filtration process is considered by the literature as polishing step, responsible for the removal of suspended particles, and removal of protozoan cysts and oocysts. During backwashing it may consume from 3% to 10% of volume produced in the WTP. It’s relevant in the final result of water production. The general objective of this paper was to evaluate modifications in production of water on WTP in real scale through changes in filtration’s careers. Physical and chemical characterization of backwashing’s water of the filters, raw water, treated water and recirculation’s water, as well as the monitoring of the pressure loss of the filters in different filter run. The results showed that: increasing in filter run increased the amount of solids in backwash water; the growth of the loss behaves as a first-degree function; You can change filter run from 24 hours to 40 hours under normal conditions at WTP Extremoz.