Barbara Juraszka, Aleksandra Sumara
Politechnika Koszalińska

Purpose of this study was to evaluate the effectiveness of application the flocculant for dewatering of sediments from coagulation of wastewater containing organicglues. Wastewateris coming from the Drewexim Company located in Nowe Bielice. The scopeof this study was to test dewatering of sediments after coagulation in the centrifugalsedimentationprocess using cationic flocculant Flopam DW 2160. The results of research were optimalparameters of conducting process of sediments dewatering: flocculant dose – (DF = 1.0 g/kg dry mass, time of centrifugation – (tw = 5 min), and rotation speed (n = 2000 1/min). Quality of sediment and effluent was determined using various parameters. Analysis of the results of the research leads to the conclusion, that with increasing dose of flocculant, solids content in effluent decreases. Till the moment of stabilization is reached (the polymerdoesn’t bind any more), the quality ofthe effluent improves. Reduction of water content in the sediments, which should take place as a result of flocculantaction, which combines smaller and hardly settling particles of suspension, into bigger, heavier floccules was observed.Such agglomerates give greater value of centrifugal force. Research on the influence of rotation time and speed, shows that with increase of rotation time and speed, water content in sediments and solids concentrationin effluent decreases to constant value.

Słowa kluczowe
efekt odwadniania; sedymentacja odśrodkowa

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