FIELD: process engineering.
SUBSTANCE: invention relates to water treatment by combination of processes including coagulation, sedimentation, flocculation and ballast flocculation additionally perfected by simplified circulation of sediment. Sediment circulation system allows operation at higher density of sediment and with less notable losses of water. Here, sediment accumulated in sedimentation zone bottom part is forced through hydraulic cyclone definite number of times in periodic cycles to increase the density of extracted sediment of solid particles. This system can be controlled also with the help of suspended solid product analyser, flow metre and/or timer.
EFFECT: control over fluid flow behaviour with the help of above described method.
21 cl, 7 dwg, 1 tbl
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