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 organic glues. Wastewater is coming from the Drewexim Company located in Nowe Bielice. The scope of this study was to test dewatering of sediments after coagulation in the centrifugal sedimentation process using anionic flocculant Opitfloc A120HMW. The results of research were optimal parameters 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 polymer doesn’t bind any more), the quality of the effluent improves. Reduction of water content in the sediments, which should take place as a result of flocculant action, 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 concentration in effluent decreases to constant value.

Słowa kluczowe
odwadnianie osadów; proces sedymentacji

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