System, useful for treating reflux of civil and industrial livestock, sludge and sewage, comprises device for separating solid product suspended in liquid into solid and liquid fractions, and filters, where flocculant is mixed with product

摘要

The system comprises a device for separating a solid product suspended in liquid into a solid fraction and a liquid fraction, a first liquid fraction filter (20) with differentiated mineral layers, a second activated carbon filter placed in cascade with respect to the first filter, a third ultrafiltration filter (17) placed in cascade with respect to the second filter, and a fourth reverse osmosis filter. A flocculant (12) is mixed with the solid product suspended in the liquid. The separation device comprises a centrifugal decanter (11) and a flotation system (14) with dissolved air. The system comprises a device for separating a solid product suspended in liquid into a solid fraction and a liquid fraction, a first liquid fraction filter (20) with differentiated mineral layers, a second activated carbon filter placed in cascade with respect to the first filter, a third ultrafiltration filter (17) placed in cascade with respect to the second filter, and a fourth reverse osmosis filter. A flocculant (12) is mixed with the solid product suspended in the liquid. The separation device comprises a centrifugal decanter (11) and a flotation system (14) with dissolved air. The first filter comprises: a first upper layer consisting of quartz sand whose particle size is 0.7-1.2 mm; a second layer underlying the first layer and consisting of granules having a particle size of 1-3 mm; a third layer underlying the second layer and consisting of granules having a particle size of 3-5 mm; and a fourth layer underlying the third layer and consisting of granules having a particle size of 5-10 mm. The second filter comprises: a first upper layer made of activated carbon whose particle size is 8-30 mesh; a second layer underlying the first layer and consisting of granules having a particle size of 1-3 mm; and a third layer underlying the second layer and consisting of granules having a particle size of 3-5 mm. The third ultrafiltration filter comprises a membrane filter provided with pores (0.02 microns). The liquid fraction is mixed with a thickener before entering the flotation system, and is mixed with the flocculant, before entering in the separating device, to separate the solid product into the liquid and solid fractions. The system is placed within a container.