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Content with label figure+narrative-text+sedimentation-basin in REBEL WP8: Biotechnology (See content from all spaces)
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Page: 1 Rectangular basins
waste water flows slowly (0.25 cm/s) and uniformly through the basin, sediment­able material separates out, float­ing material is retained by a baffle in front of the basin out­flow. The sedimented slud­ge is conveyed into the slud­ge sump ...
Other labels: biotechnology, sewage-treatment-plants, sludge, wastewater-treatment, waste-water
Page: 2 Round basins
case the waste water is guided to the centre of the basin and flows outwards uniformly in all directions to the basin edge. Outflow channels run around the outer part of the basin. A moving scraper bridge pushes the sludge towards a sludge sump in the centre of the basin ...
Other labels: biotechnology, sewage-treatment-plants, sludge, wastewater-treatment, waste-water
Page: 3 Hopper-bottom basins
type of sedimentation basin, mechanical sludge clearing is no longer necessary because the bottom is angled so greatly (at least 60°) that the sludge slides towards the bottom of the hopperbottom basin by itself. The waste water is guided towards an inflow structure in the centre ...
Other labels: biotechnology, sewage-treatment-plants, sludge, wastewater-treatment, waste-water
Page: 4 Two-storey basins (Imhoff tank)
mechanical sludge clearing is necessary. The waste water flows through the sedimentation basin horizontally. Between the two angled bottom walls there is a gap of approximately 20 cm, through which the sludge particles fall into the digestion rebwp8:Sludge digestion (anaerobic ...
Other labels: biotechnology, sewage-treatment-plants, sludge, wastewater-treatment, waste-water
Page: Activation basin-trickling bed combination
case the BOD5 rebwp8:BOD5 removal takes place in the first stage (activat­ion basin) and the nitri­fication rebwp8:2 Nitrification takes place in the second stage (trick­ling bed rebwp8:Trickling bed method ). A final sedi ...
Other labels: biological-methods, biotechnology, sewage-treatment-plants, nitrification, denitrification, activated-sludge, bod, wastewater-treatment
Page: Clearing apparatus
Clearing usually takes place discontinuously in primary sedimentation basins and continuously in final sedimentation basins (round or chain scrapers, suctiontype sludge removers). If there are several rectangular sedimentation basins rebwp8:1 Rectangular basins which are loaded in parallel, virtually ...
Other labels: parameter, biotechnology, sewage-treatment-plants, wastewater-treatment, waste-water
Page: Density currents
Long, shallow basins are more stable with respect to poorer mixing and sedimentation effect. The sinking of heavy inflow occurs in particular in final sedimentation basins. To restrict such currents as far as possible, good inflow and outflow design is important. \\ \\ !UBT429AbsetzbeckenDichteströmungen.jpg border=1,width ...
Other labels: parameter, biotechnology, sewage-treatment-plants, wastewater-treatment, waste-water
Page: Flow
Influencing factors in this case are the design of the inflow and outflow and the ratio of basin length to depth. The inflow should be distributed over the basin cross section in long basins and in a radially uniform manner over basin width and depth in round basins with a central inflow ...
Other labels: parameter, biotechnology, sewage-treatment-plants, wastewater-treatment, waste-water
Page: Foam and scum
Like bulking sludge, stable foam on the activation basin and scum in the final sedimentation basin rebwp8:5 Sedimentation basins (can be washed out of the sewage plant) are problems in biological water purification rebwp8:2 Biological purification . The causes are a low ...
Other labels: foam, scum, biological-methods, biotechnology, sewage-treatment-plants, wastewater-treatment, waste-water
Page: Outflow design
order to reduce the effect of density currents in final sedimentation basins, there are in round basins at least two outflow or side channels with overfall edges. In this way the dead space in the upper part of the basin is reduced, the flow is improved, the length of the outflow channel is increased ...
Other labels: parameter, outflow, biotechnology, sewage-treatment-plants, wastewater-treatment, waste-water
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