SU981252A1 - Apparatus for biochemical purification of effluents - Google Patents

Description

(B) DEVICE FOR BIOCHEMICAL CLEANING

one

The invention relates to wastewater treatment, in particular to combined devices for settling and biochemical treatment of wastewater.

A device for biochemical wastewater treatment is known, comprising a cylindrical body with a tubular charge located therein, a cylindroconical tank installed. under the load and separated from it by an intermediate bottom, made in the form of a tube plate, in which the lower ends of the tubular load, the input points for the initial wastewater, the withdrawal of the purified liquid and the sludge drainage are tightly fixed.

A disadvantage of the known device is an incomplete degree of purification of waste water from suspended and dissolved organic matter due to the rapid flow of waste water after loading and flushing excess waste biomass from it.

The aim of the invention is to increase the efficiency of wastewater treatment from suspended and dissolved organic matter and increase the productivity of the device.

Claims (1)

This goal is achieved by the fact that the device for biochemical wastewater treatment, containing a cylindrical body with a tubular load placed therein, a cylindroconical tank with an intermediate bottom in the form of a tube plate, input wastewater input units, purified liquid outlet and sludge removal, is located under it. a vertical partition that does not reach the bottom of the tank., which terminates below the ends of the tubular load, which separates the body into the biofiltration and secondary sedimentation chambers, by a filter from the plate ayuschego backfill material disposed on top of the settling chamber of the second Nogo, -, and positioned above tubesheet recycle rub-g boprovodom with mixer 398 communicating with the input node of the initial waste water, wherein the tubular loading chamber placed in biofiltration. The drawing shows a device for biochemical wastewater treatment. The device consists of a body 1, a tubular load 2, a cylinder-shaped reservoir 3 for collecting sludge, a bottom made in the form of a tube plate, in the holes of which the lower ends of the tubular load 2 are tightly fixed, the discharge pipe 5 of the source wastewater, the recirculation pipeline 6 , pipes 7 for sediment from-water, secondary settling chamber 8, tray 9 of treated wastewater, pipeline 10 for draining purified liquid, filter 11 from a floating backfill material, mixing tank 12 for mixing circulating s intramural water from source wastewater pump 13. The vertical walls 14, terminating below the ends of the tubular load and no income conductive tank bottom to 8. The apparatus operates as follows. The wastewater from the mixing tank 12 is supplied by the pump 13 to the housing 1 via the pressure pipe 5, the water rises at low speeds upwards through the tubular load 2, and sedimentation occurs. The clarified water flows out through the upper ends of the tubular load and, evenly distributed, flows over the outer surface of the tubular load 2, on which the biological film is grown. Biofilm is used to biologically treat wastewater. The purified water is collected by the bottom C and sent through conduit 6 to reservoir 12, from where pumps 13 are again supplied for purification to the biofilter chamber. Recycling the purified water allows a deeper degree of wastewater treatment to be achieved while at the same time increasing the productivity of the device. The purified water passes under a vertical septum I, settles in the secondary settling chamber 8 and passes through the filter 11 of the floating backfill material, freeing it from small suspended matter, excess biofilm. Purified water is collected by tray 9 and discharged by pipe 10. Precipitate falls into tank 3 from where it is removed by pipe 7 When using the proposed device, primary sedimentation and biological wastewater treatment, secondary sedimentation and filtration are provided. Due to this, the proposed device allows to reduce the values of these suspensions to mg / l and the MIC to 5-10 mg / l (in the known device, the values of these indicators, taking into account the additional settling in a separate secondary clarifier, are not less than mg / l). In addition, in the proposed device, the pressure loss is significantly reduced compared with the known device. The proposed device does not require separate primary and secondary clarifiers, as well as after-treatment filters. The use of the device makes it possible to increase the cleaning effect by 15–20 for the MIC and by 30–35 for suspended substances. This is achieved by recycling wastewater, separating the secondary sedimentation zone and filtering, construction and operating costs are reduced by 20-25 due to an increase in the productivity of the device and the abandonment of the construction of separate structures for secondary sedimentation and filtration. The invention The device for biochemical treatment of wastewater, containing a cylindrical body with a tubular load, located beneath a cylindroconical tank, with an intermediate bottom in the form of a tube plate, the input nodes of the original wastewater, the output of the purified liquid and sludge removal, which is thicker than , in order to improve effluent treatment of wastewater from suspended and dissolved organic matter and to increase the productivity of the device, it is equipped with a vertical tank that does not reach the bottom of the tank by separating the hull into the biofiltration and secondary settling chambers, with a floating loading filter located in the upper part of the secondary settling chamber and located above the tubular recirculation pipe with a mixer communicating with the source wastewater injection unit, while the tubing loading is located in the biofiltration chamber. Sources of information taken into account in the examination 1. USSR author's certificate N ° 791636, cl. C 02 F 3/12, 1978.