SU1355616A1 - Device for purifying waste water - Google Patents

Abstract

The invention relates to the treatment of wastewater and can be used for the treatment of municipal and industrial wastewater or for the additional purification of biologically treated wastewater. The purpose of the invention is to increase the efficiency of wastewater treatment by ensuring that the rate of biochemical oxidation is consistent with the filtration rate and to improve the sedimentation conditions of suspended solids. The device includes a housing 1, snuff / J. 97i / e, / (L with sd cd 05 05

Description

13556

air duct 10 and pipelines 9, 11J12 for supplying and discharging the treated effluent and sedimentation, divided into biofiltering zone 2, made in the form of an inverted truncated cone, and settling zone 3, separated by non-bottom wall 4, coaxial walls, enclosing filtering area and casing walls

so that the cross-sectional areas of the formed channels change in the direction of movement of the treated wastewater, the stream water flows through the pipeline 9 to the lower part of zone 2, passes through it, then enters the settling zone, passes under the partition 4, changing the direction from the descending to the ascending, pass through the settling zone and

one

The invention relates to devices for the treatment of municipal and industrial wastewater or the purification of biologically treated wastewater.

The purpose of the invention is to increase the efficiency of the wastewater treatment process by ensuring compliance between the rates of biochemical oxidation of organic substances and filtration and the improvement of conditions for the removal of suspended solids.

Fig, 1 shows a schematic longitudinal section of the device; FIG. 2 is a section A-A in FIG. 1; FIG. 3 is a section BB in FIG. I,

The device comprises a housing BHyT-of which biofiltration chamber 2 is located, a settling chamber-3, divided by a bottom-not-spreading snow-screen 4 into zones 5 and 6 of the descending and ascending flows, and sludge accumulation zone 7, a tray 8 for collecting treated wastewater, pipeline 9 for supplying and distributing source wastewater, pipeline 10 for supplying and distributing air or oxygen, pipeline 1 1 Pulling off clean; sewage and sludge discharge pipeline 12. Above chamber 2, zone 13 is located, designed to prevent load removal.

sixteen

collected in an annular tray 8, from where the treated wastewater is discharged by pipeline 11. A biofilm is formed on the surface of the charge grains in zone 2. To supply oxygen to the biofilm, oxygenated air, or oxygen, is supplied to the lower part of zone 2 through conduit 10. In the process of vital activity, the microorganisms of the bio-film oxidize the organic substances found in the treated water. The dead biofilm is carried by a stream of water to the sedimentation zone, where it precipitates. The precipitate is collected in zone 7, from where it is periodically discharged through pipeline 12. In order to prevent the removal of the particles of the charge from zone 2, a protective zone 3, 3 sludge is provided.

0

five

The device works as follows.

The wastewater through conduit 9 is delivered to the lower part of chamber 2, passes through it then enters zone 5, passes under partition 4j, and the direction from the descending to the ascending 5 passes through zone 6 and is collected in an annular tray 8 where the treated wastewater is diverted from pipe 11,

A biofilm is formed on the surface of the charge grains in chamber 2, the oxygen supply to the biopleik in the lower part of the chambers) 2, through the conduit 10, air is supplied or air, which is oxygenated, or oxygen. In the process of vital activity, the biofilm microorganisms oxidize the organic substances in the treated water. The dead biofilm is carried by a stream of water into chamber 3, where it precipitates. The precipitate is collected in zone 7; from where it is periodically discharged through conduit 12. Zone 13 is provided to prevent the discharge of the charge particles from zone 2.

Regeneration of the filtering load is not required, since weighted webs

0

0

3.135561

Water and air are removed from the filter zone,

As a filtering charge g, gravel, expanded clay or slag with a grain size of 2-10 mm is used. The height of the layer of filter loading is 1-2 m.

The device operates in constant mode. Filtration rate 3–6 m / h, aeration intensity 1.5–3 MVM.4.

The proposed device allows, by increasing the time of contact of wastewater with a biofilm, to significantly increase the effect of post-treatment. In addition, due to the higher utilization rate of oxygen in the device, the efficiency of the biochemical purification process is increased, since the costs for air supply are reduced, washing of filtering materials is not required, i.e., there are no costs for washing water supply and its cleaning.

64

Claims (1)

Invention Formula A wastewater treatment device comprising a housing divided by a partition into biofiltration and settling chambers, feedwater supply and discharge pipelines and treated water with a tray, as well as an aerator, characterized in that, in order to increase the efficiency of the wastewater treatment process by providing the correspondence between the rates of biochemical oxidation of organic substances and filtration and the improvement of conditions for the sedimentation of suspended substances, the biofiltration chamber is made in the form of a reverse truncated cone, and The device is in the form of a perforated pipeline at the bottom of the biofiltration chamber under the source water supply pipeline, the device is equipped with a partition that is not reaching the bottom of the casing and placed coaxially to the walls of the biofiltration chamber and the casing; . fig.g fi & .3 Editor Y. Sereda Compiled by L. Sukhanova Tehred M. Didyk Order 5750/24 Circulation 851 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 Proofreader V. But ha