SU912682A1 - Apparatus for decontaminating and purifying highly concentrated effluents - Google Patents

Description

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The invention relates to installations for the disinfection and purification of highly concentrated wastewater and can be applied in the milk, food, fish processing, light. and the chemical industry, as well as in agriculture.

A known installation for anaerobic two-stage treatment of highly concentrated wastewater, containing hermetic, tanks for fermenting sludge St.

Known installation ineffective in operation.

A device for the disinfection and purification of highly concentrated wastewater is also known, containing a preheater, a degasser, digesters with built-in heat exchangers, 2J process piping.

However, the circulation of wastewater in digesters is insignificant and the concentration of activated sludge is not regulated by volume, which increases the duration of the treatment process.

The purpose of the invention is to increase the efficiency of use by intensifying the treatment process and reducing its duration.

This goal is achieved by the fact that a plant containing a preheater, a degasser, first and second stage digesters with ring collectors for collecting and releasing activated sludge, connecting the metal digester pipes, process pipelines for the input and output of treated water to digesters and apparatus for the installation,

5 and also the pumping equipment is equipped with a cylindrical guide partition installed along the axis of the first step digester body above the annular manifold, and

20 two cylindrical partitions coaxially located along the axis of the body of a second-stage digester, with the outer partition

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placed at a distance from the bottom of the case, and internally attached to the bottom.

In addition, the plant is equipped with a recirculation pipe connected to the active sludge feed line and a pipeline for the input of treated water to the first stage digester.

The drawing shows the proposed installation.

The installation contains a digester of the first stage 1 with a cylindrical partition 2 installed above the annular collector 3 of the release of circulating sludge, node i | collection of mechanical impurities with a nozzle 3 and a hydraulic lock, pipeline 6 for introducing treated water into the digester and gas collector 7. Pipelines 8 and 9; The power line 10 and the pump 11 connect the methane tank 1 to the second stage methane tank 12. Water traps 13 and 14 are provided on the pipelines. Two cylindrical partitions 15 and 1b are coaxially mounted in the digester 12. The inner partition 16 is attached to the bottom of the digester 12 and an annular collector 17 is placed at the bottom of the base to collect circulating sludge and the outer partition at a distance from the bottom. The digester is equipped with a pump 18 with a sprinkler for mixing the sludge in the blender chamber 19, an outlet nozzle 20 with a hydraulic pattern for removing excess sludge equipped with level sensors 21 and 22, a gas collector 23 and a nozzle for removing treated water. The installation is also equipped with a pipeline 25 for water supply to the installation, a submerge 2b, a degasser 27 and a pump 28.

The installation works as follows.

Wastewater is supplied through conduit 25 to preheater 2b, where the effluent is heated and fed to degas eater 27, from where pump 28 transfers to digester 1, the food is mixed with activated sludge and flows into the descending flow inside the bulkhead 2. Through the annular canals outside the bulkhead 2 a mixture of effluent with activated sludge enters an upward flow, where, using a pump 11 and an annular collector 3, an additional circulator 682 4 is jets fed through an Ip pipeline.

active silt. From the digester 1, the drains are fed through a conduit 8 with a diffuser into the fermentation chamber, separated by a partition 16

5 from the sediment zone of methanetetic 12. In this chamber, the effluent passes through a suspended layer of activated sludge. By means of a pump 18 with a sprinkler, a suspension of sludge is created. AT

@; a ring collector 17 dp of circulating activated sludge is installed in the lower part of the settling zone, which is pumped by pump 11 through the conduit 10 into the digester 1. The amount of sludge is regulated by a hygrozatzor N. 22, In the bottom 1, an outlet is provided through the nozzle 5. Through the annular channels outside the partition 15, the drains enter the settling zone above this

septum. Gas produced in 5 digesters is discharged through GZZO collector 23 and 7 "Disinfected and treated wastewater from nozzle 2k is directed through heater 2b to the after-treatment. Both digesters work in a mode that guarantees organic fermentation and decontamination. Heating is conducted by conventional methods, providing the most efficient thermal conditions. From & JTOK active sludge through the annular collector 17 from the bottom of the digester 12 and through the nozzle 20 is fed to centrifuges. Dry sludge contains a large amount of biomass and can be used as a 1015 additive in the preparation of animal feed or used for feeding fish in pond farms.

The application of this invention makes it possible to shorten the process time, to ensure high-quality disinfection and purification of contaminated sewage with organic impurities, and to use excess activated sludge as a feed additive.

The proposed economic effect from the introduction of this device with a daily intake of 10,000 m is approximately 50 thousand rubles. in year.

Claims (1)

1. Installation for disinfection and purification of highly concentrated wastewater, containing a preheater, degasser, first and second stage methane tanks with annular collectors for collecting and discharging activated sludge, connecting the methane tanks and pipeline, process piping of the input and output of treated water to the methane tanks and equipment as well as pumping equipment, which, in order to increase the efficiency of use by intensifying the treatment process and shortening its duration, is equipped with tanovlenii axis of the housing of the first stage digester above the annular collector cylindrical baffle and 26 two coaxially arranged on the axis of the housing digester second audio stupr cylindrical baffle | 1 "1 ,. at the same time, the outer wall is placed at a distance from the bottom of the case, and internally attached to the bottom. 2, Installation according to claim 1, in connection with the fact that it is equipped with a recirculation pipeline connected to the activated sludge pipeline and the pipeline of input of treated water to the first stage digester. Sources of information taken into account during the examination 1, USSR Author's Certificate No. 281276, cl. C 02 C 3/00, E7 2, UK Patent H1 51398, cl. C 02 C 1/4, 1976.