The paper presents the results of the experiment on the separation of the solid phase from the sewage disposed to the household sewage treatment plant. On the basis of the results the modification of the treatment plant's technological chain was proposed by the appliance of the additional device - Aquatron separa-tor, which uses the Coanda effect, for solid phase separation from the sewage. The results of the model laboratory analyzes on the separation efficiency were the ba-sis for this proposition. The research was carried out for the changeable drop of the inlet pipe (1,0-5,0%), different volume of the sewage and the solid phase con-tent. The research results showed the possibility of 94,9-97,3% reduction of the suspended solids' load. ...
To determine the influence of suspension brought to the Nysa Łużycka River , an experiment was carried out involving a controlled discharge of mine waters to the Miedzianka River with the maintenance of the total concentration of suspension not exceeding the threshold value of 30 mg/l. The study concerned the qualitative and quantitative changeability of introduced load of suspension in the river section of approximately 110 km along 15 profiles of The Nysa Łużycka River. The study included the Nysa Łużycka sector from Sienawka to Łęknica. Developed no-mograms of discharge time worked out for data from the multiyear 1991-2008 comprised the basis for establishing the discharge time of the analysed sector of the Nysa Łużycka River which in turn determines the sampling of the river waters. The studies were conducted in the zones of low and high stream discharges. It was found that water discharged from mine to the Nysa Łużycka River after its treatment in highly efficient sewage treatment plants includes suspension of low sedimentation whose quantitative volume changes in the receiver are conditioned only by the process of dilution. The concentration of suspension which is maintained by the Nysa Łużycka River at low and mean discharges, above and ...
During removal of suspension in course of water and wastewater treatment processes the crucial role is played by properties and features of individual parti-cles. Such parameters as specific surface area, shape, size and compaction of sus-pension particles may decide on their settling and sorptive properties. The results of grain size analysis, obtained by means of laser granulometer, give information about structure and size of particles that form suspension.In this paper the original results of suspension's grain size analysis con-ducted on municipal wastes originating from mechanical-biological wastewater treatment plants and on filter backwash water taken from iron and manganese re-moval filters on groundwater treatment plants are presented.The modified form of Avrami equation was used in order to describe grain size results and to identify the process of suspension's formation. ...
