RU58117U1 - SEWAGE TREATMENT PLANT - Google Patents

Abstract

Usage: In wastewater treatment plants for biochemical treatment and deep tertiary treatment of domestic and industrial wastewater close to them in composition. Creature: The apparatus comprises a water pressure quenching chamber, a water flow averager with a water pressure quenching chamber and a hydraulic mixing system including a first pump and pipelines, an aeration tank divided into two stages by an appropriate partition, an aeration system including a compressor with pipelines and aerators, the first of which is located in the first stage of the aeration tank, the second pump, the inlet of which is connected to the intake manifold, and the output through the corresponding pipeline - to the denitrifier containing the load, a tank with purified water located at the outlet of the installation, while the sewage supply pipe is connected to the inlet of the water flow averager, and the purified water drainage pipe is connected to the outlet of the purified water tank, in the hydraulic mixing system, the inlet of the first pump is connected to the suction sewage pipe from averager, and the output of the specified pump is connected to a pipeline for returning part of the wastewater to the averager and a pipeline for supplying wastewater to the denitrifier, filtering the membrane module with a vacuum manifold located in the second stage of the aeration tank, a third pump installed in the purified water withdrawal line from the filtering membrane module, a fourth pump installed in the washing water withdrawal line from the purified water tank, a vacuum gauge connected to the vacuum manifold, and the outlet of the purified sampling line water from the filtering membrane module is connected to the inlet of the tank with purified water, and the outlet of the washing water withdrawal line from the tank with purified water is connected to the filter he membrane modules connected to the suction collector. The filter membrane module contains hollow fiber polymer elements or plate polymer elements. A water meter and a control valve are installed in the purified water withdrawal line from the filtering membrane module. A control valve is installed in the wash water withdrawal line from the purified water tank.

1 n.p.f.p.m., 1 ill.

Description

The utility model relates to wastewater treatment technology under anaerobic and aerobic conditions, in particular, to biochemical treatment of organic, nitrogen-containing substances and substances, and can be used for biochemical treatment and deep treatment of household wastewater and industrial wastewater close to them.

A known wastewater treatment plant [1], comprising an aeration tank, an aerobic stabilizer and a centrally located secondary sump, traps with drainage trays installed in the aerobic stabilizer trap with the ability to move around a horizontal axis, an inclined shield with a hinge, and also horizontally located in the upper part installation of a pipeline connecting the drainage tray of the aerobic stabilizer and aeration tank.

The disadvantage of this installation is the low efficiency of wastewater treatment.

A known installation for wastewater treatment and treatment of sludge [2], containing a primary sump with pipelines for supplying wastewater and drainage of clarified water and sludge, aeration tanks of the first and second stages with aerators, frames with a filler made of nylon fiber and fiberglass in the form of "ruff ", With a mesh box with loading, thin-walled modules, as well as compressed air pipelines, aeration tanks aerators are located along and across the corridors of the latter, frames with a filler are placed in the primary settling tank with an adjacent Niemi to the aerators in the aeration tank of the second stage mesh ducts aerators placed over the aeration tank of the first stage, a thin-film modules - in the sump of the second stage, the sump of the second stage is connected to a conduit with a primary clarifier.

The disadvantage of such a wastewater treatment system is also the insufficient efficiency of wastewater treatment and a large amount of equipment.

Closest to the proposed technical solution is the known installation for wastewater treatment [3], containing a chamber for quenching the pressure of water,

located in the water flow averager, aeration tank, sump, loading filter and disinfectant, partitions, pipelines and pumps, while the sewage supply pipe is connected to the inlet of the water flow averager, and the purified water discharge pipe is connected to the disinfectant outlet, the aeration tank is connected through a thin-layer sludge separator to a sump that is connected through a direct overflow in the corresponding partition with a filter connected to the disinfectant, while the water flow averager is equipped with a hydraulic sewage, including the first pump, the corresponding pipelines and a water-air ejector, the aeration tank is equipped with an aeration system including a second pump with the corresponding pipelines and a water-air ejector, in the hydraulic mixing system, the inlet of the first circulation pump is connected to the suction pipe for collecting wastewater from the averager, and the outlet of the specified pump is connected with a pipeline for returning part of the wastewater to the averager and a pipeline for supplying wastewater to the aeration tank, at the pipeline for supplying water from the averager the first water meter is installed in the aeration tank; in the aeration system, the inlet of the second circulation pump is connected to the suction collector, to which the sludge recirculation pipe from the sump and the wash water pipe connected to the filter outlet are connected, in the aeration system, the excess sludge discharge pipe and the sludge supply pipe averager.

The disadvantage of this installation is the complexity of the treatment plant, due to the large amount of equipment, as well as the insufficient degree of wastewater treatment.

The technical result, which consists in eliminating these drawbacks, is achieved in the proposed wastewater treatment plant, comprising a water pressure quenching chamber, a water flow averager with a water pressure quenching chamber and a hydraulic mixing system including a first pump and pipelines, an aeration tank divided by a suitable partition into two stages, aeration system, including a compressor with pipelines and aerators, the first of which is located in the first stage of the aeration tank, the second pump, the input of which is connected n with

a suction collector, and the outlet through an appropriate pipeline with a denitrifier containing a charge, a tank with purified water located at the outlet of the installation, while the sewage supply pipe is connected to the inlet of the water flow averager, and the purified water discharge pipe is connected to the outlet of the purified water tank, in the hydraulic mixing system, the inlet of the first pump is connected to the suction pipe for withdrawing wastewater from the averager, and the outlet of the specified pump is connected to the return pipe wastewater to the averager and a pipeline for supplying wastewater to the denitrifier, in that it contains a filtering membrane module with a vacuum manifold located in the second stage of the aeration tank, a third pump installed in the purified water withdrawal line from the filtering membrane module, and a fourth pump installed in the highway the selection of washing water from the tank with purified water, a vacuum gauge associated with the vacuum manifold, and the output of the line for the selection of purified water from the filtering membrane module is connected to the inlet of the purified water tank, and the outlet of the wash water withdrawal line from the purified water tank is connected to a filtering membrane module connected to the suction collector.

The specified technical result is also achieved by the fact that the filtering membrane module contains hollow fiber polymer elements or plate polymer elements.

To control the flows, a water meter and a control valve are installed in the purified water withdrawal line from the filtering membrane module, and a control valve is installed in the wash water selection line from the purified water tank, which allows you to set the optimal flow rates of purified and wash water.

The essence of the utility model is illustrated by the drawing, which shows the technological block diagram of the installation.

The proposed installation for wastewater treatment contains a water flow averager 1, denitrifier 2, aeration tank, consisting of the first and second stages 3 and 4, separated by a partition 5, a tank 6 with purified water located at the outlet

installations, a filtering membrane module 7 and a piping system for transporting liquid media and air ducts for supplying air to the aeration system. In the averager 1 of the water flow are located chamber 8 damping water pressure and sand trap 9.

The pipeline 10 for the supply of effluents is connected to the inlet of the averager 1 of the water flow, and the pipe 11 for discharging purified water is connected to the outlet of the tank 6 with purified water. The water flow averager 1 and denitrifier 2 are equipped with a hydraulic mixing system, including a first pump 12 (circulation), a first pressure collector 13 (shown by a double line), a suction pipe 14 for collecting wastewater from averager 1, a pipe 15 for returning part of the wastewater to averager 1 and the sewage water supply line 16 to the denitrifier 2. The input of the first pump 12 is connected to the suction pipe 14, and the output of the pump 12 is connected through the first pressure header 13 to the pipelines 15 and 16.

The denitrifier 2 and the filtering membrane module 7 are equipped with a system for recirculating sludge and discharging excess sludge, including a second pump 17 (recirculation), a suction collector 18, a sludge collection pipe 19 from the filtering membrane module 7, a valve 20, a sludge collection pipe 21 from the denitrifier 2, a second pressure collector 22, a pipe 23 for supplying return sludge to the denitrifier 2 and a pipe 24 for dumping excess sludge.

The input of the second pump 17 is connected to the suction manifold 18, to which the pipelines 19 and 21 are connected, and the output of the pump 17 is connected to the pipelines 23 and 24 through the second pressure collector 22.

The aeration system comprises a compressor 25, a collector 26 connected to air ducts 27 and 28, connected respectively to aerators 29 and 30, located respectively in the first 3 and second 4 steps of the aeration tank and made in the form of pipes with holes.

The water flow averager 1 is connected via an adjustable reverse first overflow 31 through the first partition 32 to a denitrifier 2 connected through an adjustable second overflow 33 in the second partition 34 to the first aeration tank stage 3, which, in turn, is connected through a direct third overflow 35 under

a partition 5 with a second stage 4 of the aeration tank, and therefore with a filtering membrane module 7, in the upper part of which there is a vacuum manifold 36.

At the same time, the flow direction “from left to right” is considered to be direct, and “right-to-left” is considered to be reverse. Elements 37 and 38 (adjustable gate valves) are designed to adjust the flow rate of water in the stream.

The output of the filtering membrane module 7 is connected via a pipeline 39, on which a vacuum gauge 40, a valve 41, a third pump 42, a water meter 43 and a control valve 44 are installed, with a tank 6.

Denitrifier 2 contains a load 45, which is made in the form of cassettes.

In the hydraulic mixing system and in the system for recirculating sludge and discharging excess sludge, counters 46 and 47 are installed, designed to control the amount of fluid passed through, and valves 48, 49, designed to control the flow of liquid media in the respective pipelines.

A valve 50 is installed on the pipe 23, and a valve 51 is installed on the pipe 21, which together with the valve 20 are used to control flows in the recirculation system of the return sludge. A valve 53 is installed on the pipe 52 to adjust the flow of wash water from the reservoir 6 to the filter membrane filter 7.

In addition, the fourth pump 54 is installed on the pipe 52, the input of which is connected through the valve 55 and the pipe 56 to the tank 6.

A valve 57 is installed on the pipe 24 to adjust the amount of sludge discharged into the sludge collector (not shown in the drawing).

In the aeration system on the ducts 27 and 28 installed valves 58 and 59, designed to adjust the amount of air supplied to the aerators 29 and 30.

In the chamber 8 for quenching the water pressure, a trellis container 60 is installed for collecting garbage, and a partition 61 is installed in the sand trap, which changes the flow direction of the waste water entering the installation.

In the second stage 4 of the aeration tank, a semi-submersible baffle 62 is installed, installed in front of the module 7 and designed to set the necessary

water flow directions. The partition 62 is attached to the side walls of the nitrification 4 (not shown).

Installation works as follows.

Wastewater from a sewage pumping station (not shown) or by gravity enters through a pipe 10 into a chamber 8 for quenching the water pressure with a lattice container 60 located in it, designed to purify water from debris and coarse particulate impurities that are periodically manually removed into a garbage container ( not shown in the drawing).

From the pressure quenching chamber, the wastewater flows by gravity into the sand trap 9 and further, enveloping the baffle 61 into the averager 1 of the water flow.

The water level in all tanks of the installation is shown in the drawing by a dashed line, and the direction of circulation of the liquid medium is shown by arched arrows.

Sand from the bunkers of the sand trap 9 under the influence of hydrostatic pressure is periodically dumped (marked by arrow 63) to the sand pads.

At the same time, part 1 of the denitrified sludge mixture from denitrifier 2 enters the averager 1 through a reverse controlled first overflow 31, where it undergoes anaerobic treatment in the absence of dissolved and bound oxygen (in nitrates), which contributes to the creation of anaerobic conditions.

The system of hydraulic mixing, working from the first (circulation) pump 12 through the suction pipe 14 and the waste water return pipe 15, helps to prevent sludge settling.

A denitrified mixture simultaneously treated under anaerobic conditions with wastewater purified from debris is fed through a first pressure collector 13 and a water meter 46 through a pipe 16 to a denitrifier 2. There, through a pipe 23, a pump 17 (recirculation) from the second stage 4 of the aeration tank recirculates through the suction collector 18 silt mixture with a high content of nitrates. Under the action of denitrifying sludge, located on the load 45, nitrates are converted into gaseous nitrogen, which is removed naturally.

The process of denitrification and prevention of sedimentation of sludge is facilitated by hydraulic mixing under the action of jets from pipelines 16 and 23.

From the denitrifier 2, the sludge mixture flows by gravity through an adjustable direct second overflow 33 to the first stage 3 of the aeration tank, where aerobic biochemical treatment of water from the main part of organic pollution occurs.

In the first stage 3 of the aeration tank, mixing of the sludge mixture and preventing sludge settling is provided by sparging the mixture using an aeration system by supplying air from the compressor 25 through the collector 26 and air ducts 27 and 28 to the aerators 29 and 30.

Next, the waste water enters the filtering membrane module 7, located in the second stage 4 of the aeration tank, through a direct third overflow 35, made in the form of windows in the lower part of the partition 5.

The filtering membrane module 7 contains hollow fiber polymer elements or plate polymer elements (not shown). The input stream of purified water enters the external surfaces of these elements and passes into the internal cavities of these elements through micropores in the walls. The internal cavities of the filter elements communicate with the vacuum manifold 36.

After passing through module 7, the filtrate (purified water) from the vacuum manifold 36 is sucked off by a pump 54 and fed to a clean water tank 6 and sent through a pipe 11 to a reservoir. To regulate and control the operation of the filtering membrane module 7 on the pipe 39 installed manovacuum 40, as well as a water meter 43 and control valve 44.

To purge the filtering membrane module 7, a pump 54 is used, connected by a suction pipe 56 to a clean water tank 6 and a discharge pipe 52 with a vacuum manifold 36 of module 7. Valves 41 and 55 are used to shut off the corresponding suction pipes (39 and 56), and valve 53 to adjust the purge pressure of the module 7 according to the readings of the manovacuum 40.

Over time, salts of certain substances present in wastewater are deposited in the pores of the membranes. This requires chemical treatment of the membranes in

appropriate solutions. For the chemical cleaning of membranes, the clean water tank 6 has at least 2 sections (not shown in the figure), one of which can be used for chemical cleaning (regeneration) of the membranes.

On the pipelines and in front of the pumps, shut-off valves 51, 20, 55 are installed. To ensure the possibility of regulating the flow of liquid media and aerating air, control elements-valves 48, 49, 50, 57, 44, 53 are installed on the corresponding pipelines and on the air ducts 27 and 28 - valves 58 and 59.

As a result of using the filtering membrane module 7, placed directly in the aeration tank, the following positive effect is achieved:

- the concentration of sludge in the filtrate is below the standards for fishery reservoirs;

- increases the concentration of sludge in the reaction space of treatment facilities, which in turn increases the degree of purification from organic and inorganic compounds;

- the number of stages of the technological process of cleaning is reduced, and in connection with an increase in the concentration of sludge, the size of the remaining facilities is reduced, in particular for biochemical treatment.

The installation is made in the form of a metal container, has small dimensions and light weight, which facilitates its installation, and can be transported by road, rail and sea.

Information sources:

1. RF patent No. 785225, M. Cl. C 02 F 3/12, published. 1980.

2. RF patent No. 1710525, M. Cl. C 02 F 3/30, published. 1992

3. RF patent No. 2225367, M. Cl. C 02 F 3/30, published. 2004 year

Claims (5)

1. Installation for wastewater treatment, comprising a water pressure quenching chamber, a water flow averager with a water pressure quenching chamber and a hydraulic mixing system including a first pump and pipelines, an aeration tank divided into two stages by an appropriate partition, an aeration system including a compressor with pipelines and aerators, the first of which is located in the first stage of the aeration tank, the second pump, the inlet of which is connected to the intake manifold, and the output through the corresponding pipeline to the denitrifier, contains In order to load, a tank with purified water located at the outlet of the installation, while the sewage supply pipe is connected to the inlet of the water flow averager, and the purified water discharge pipe is connected to the outlet of the purified water tank, in the hydraulic mixing system, the inlet of the first pump is connected to the intake suction pipe waste water from the averager, and the outlet of the specified pump is connected to a pipeline for returning part of the wastewater to the averager and a pipeline for supplying wastewater to the denitrifier, characterized in the fact that it contains a filtering membrane module with a vacuum manifold located in the second stage of the aeration tank, a third pump installed in the purified water withdrawal line from the filtering membrane module, a fourth pump installed in the washing water withdrawal line from the purified water tank, a vacuum gauge connected with a vacuum manifold, the outlet of the purified water withdrawal line from the filtering membrane module being connected to the purified water reservoir inlet, and the outlet of the wash water withdrawal line of purified water tank connected to the filter membrane module, connected to the suction collector. 2. Installation for wastewater treatment according to claim 1, characterized in that the filtering membrane module contains hollow fiber polymer elements. 3. Installation for wastewater treatment according to claim 1, characterized in that the filtering membrane module contains plastic polymer elements. 4. Installation for wastewater treatment according to claim 1, characterized in that a water meter and a control valve are installed in the purified water withdrawal line from the filtering membrane module. 5. The wastewater treatment plant according to claim 1, characterized in that a control valve is installed in the wash water withdrawal line from the purified water tank.