SU1754668A1 - Plant for microbiological treatment of sewage water - Google Patents

Abstract

Use of the invention: an increase in the degree of wastewater treatment by 10-15%, elimination of the need for the collection and disposal of excess sludge and provision of facilities for operating the plant under industrial conditions. These advantages are provided by the design of bioreactors, the ratio of the volumes of anaerobic and aerobic blocks, the angle of inclination of the bottom of the aerobic block towards the zone, aeration and loading of bioreactors. SUMMARY OF THE INVENTION: The installation comprises an anaerobic water treatment unit with heating and an aerobic water treatment unit with an aeration system in the form of adjacent communicating sections with charging material. Sections of the anaerobic block are made in the form of sequentially communicating vertical pipes with a feed material in the form of ruffs. Sections of the aerobic unit are made of two compartments with loading material in the form of vii on the contact frames. The ratio of anaerobic and aerobic volumes is 1: (2.5-3.5), and the bottom of the aerobic unit is located with a slope of 10-15 ° C. towards the aeration compartment. 1 h, para. f-ly, 4 ill.

Description

The invention relates to the treatment of industrial wastewater, including wastewater from gas processing facilities, can be used for effective biological treatment of wastewater from a wide range of dissolved and suspended organic compounds.

A known plant for microbiological treatment of wastewater, comprising an anaerobic water treatment section and an aerobic water treatment section, which are made of a series of adjacent communicating chambers separated by vertical partitions. Anaerobic Treatment Section

equipped with a heating system, and the aerobic treatment section with an aeration system.

However, the use of a known plant for microbiological treatment of wastewater does not provide the necessary efficiency of treatment, convenience and safety of operation.

The aim of the invention is to increase the degree of cleaning, versatility, convenience and safety of operation of the installation.

The goal is achieved by the fact that in a microbiological sewage treatment plant containing an anaerobic VI unit

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water treatment with a heating system and an aerobic water treatment unit with an aeration system, made of a series of communicating sections, having a load of synthetic material, the sections of the anaerobic unit are made in the form of sequentially communicating vertical pipes, each pair of which is equipped with an TMTTWTT installed at the top, each section of the aerobic unit is made of a working compartment with a system of perforated air supply pipelines for the regeneration of the load and the aeration compartment, while the ratio of the worker is ema anaerobic unit to the working volume of the aerobic unit is 1: (2.5-3.5); the bottom of the aerobic unit is located at an angle of 10-15 ° in the direction of the aeration compartment. In this case, the loading of anaerobic sections is made in the form of ruffs, and the loading of the working compartment of the aerobic sections - in the form of vii located on the contact frames.

The ratio of the working volume of the anaerobic unit to the working volume of the aerobic unit 1: (2.5-3.5) ensures optimal conditions, since with this ratio the maximum efficiency of the wastewater treatment process is achieved. A decrease in the volume of the anaerobic block leads to an increase in the load on the aerobic block, and an increase in the volume of the anaerobic block hampers the formation of the trophic chain of hydrobionts, which in both cases leads to a decrease in the efficiency of the cleaning process.

The location of the bottom of the aerobic unit at an angle of 10-15 ° in the direction of the aeration compartment prevents the accumulation of excess biomass at the bottom of the aerobic unit. The loading of anaerobic sections in the form of ruffs, and the working compartment of the aerobic sections in the form of vii, allows to increase the concentration of microorganisms in bioreactors.

Figure 1 shows the installation, longitudinal section; in fig. 2 - anaerobic block section; in fig. 3 shows a section A-A in FIG. in fig. 4 is a section BB in FIG.

The microbiological purification unit contains successively connected heating system 1, anaerobic water treatment unit 2, and aerobic treatment unit 3 connected by process piping. Heating system 1, connected to the hot water line, maintains the temperature of the waste water in the anaerobic unit in the range of 25-30 ° C. The heating system is connected by pipe 4 to a pump 5, with which it fills the net with wastewater, and pipe 6c by an anaerobic water treatment unit 2 having a nozzle 7 for introducing mineral supplementation of microorganisms. As a mineral supplement, for example, a 10–20% solution of diammonium phosphate is used.

The anaerobic treatment unit 2 consists of consecutively connected plastic pipes 8, each of which is fixed to a boot of type 9 ruff and each pair of which has a nozzle 10 for draining the gaseous waste products of microbial organisms to the first section of the aerobic unit.

The aerobic treatment unit 3 consists of a rectangular body 11, adjacent sections 12 with vertical partitions 13. The partitions have unequal height, which ensures a consistent overflow of water from one section to another. In sections 12, contact frames 14 are placed with a type 15 loading attached to them. Each section of the aerobic unit is divided by partitions 16 into a working compartment 17 and aeration compartment 18. In the aeration compartment 18 of each section, compressed air is supplied through the perforated lines 19 and 20 to regenerate the charge and remove excess biomass. The ratio of working volumes of anaerobic and aerobic blocks is 1: (2.5-3.5).

The bottom 21 of the aerobic unit is located at an angle of 10-15 ° toward the aeration compartment to prevent silting.

The installation works as follows.

Sewage water is pumped into pump 1 by means of a pump 5, from where it is heated to 25-30 ° C and fed to an anaerobic unit 2. Mineral feed is fed here through pipe 7, a 10-20% solution of diammonium phosphate, which is nutrient additive for microorganisms. Sewage water, moving through all sequentially connected vertical pipes 8 of the anaerobic unit 2, is in contact with the anaerobic microflora attached to the ruff, while the dissolved organic compounds undergo destruction. The gaseous products formed as a result of the viability of anaerobic microorganisms accumulate in the upper part of vertical pipes 8 and are collected in the gas outlet 10, from where they enter the first section of the aerobic unit.

Further, the waste water flows by gravity into the aerobic unit, where it moves sequentially through six adjacent sections 12 in

an account of the unequal height of the vertical partitions 13. of the separating sections, while subjecting to the effects of aerobic microflora retained on a vi-type load placed on the contact frames 14.

The aeration and mixing of the effluent is carried out by a perforated aeration conduit 19 located in the aeration compartment 18.

Due to the gradual accumulation of excess biomass, periodic regeneration of the load is necessary. For this purpose, the compressed air is supplied to the working compartment 17 by means of regeneration pipes 20. At the exit from the aerobic unit, the degree of wastewater treatment reaches 90-95%.

Example 1. The determination of the ratio of the volumes of anaerobic and aerobic blocks was carried out in laboratory conditions. The studies were carried out on an experimental model of the existing wastewater treatment plant, reproducing the main working conditions taking into account the scale factor.

Purification efficiency was assessed by the results of removal of dissolved organic compounds, estimated as chemical oxygen consumption (COD mg O / l), and removal of suspended organic matter, assessed by the suspended matter content (mg / l). The research results are summarized in table 1.

The data presented in Table 1 shows that an increase in the volume of the anaerobic block causes a slight decrease in the purification efficiency by COD and significantly worsens the purification rates for suspended substances due to a reduction in the units of the trophic chain of hydrobionts. A decrease in the volume of the anaerobic block leads to a significant decrease in the cleaning efficiency of COD and a deterioration in the cleaning performance of suspended solids, which is caused by an increased load on the anaerobic block of the plant.

EXAMPLE 2 The determination of the angle of inclination of the bottom of the aerobic unit towards the aeration compartment was carried out under laboratory conditions described in Example 1.

The research results are summarized in table 2.

From Table 2 it can be seen that the bottom tilt angle is 10-15 °.

Froze The determination of the versatility of the installation was carried out in the laboratory conditions described in Example 1.

Waste gas from a gas processing plant with a wide range of dissolved organic matter from weakly contaminated industrial effluent mixed with

well-watered to highly concentrated effluent.

Depending on the load on the installation varied the residence time of wastewater in the installation. Purification efficiency was assessed by a reduction in COD.

The research results are presented on the table. 3

As an inoculum, an accumulative culture of microorganisms was introduced, adapted to the drains of the indicated production.

The use of the invention eliminates the need for the collection and disposal of excess sludge, which creates convenience for operating the plant under industrial conditions. The operation of the anaerobic block becomes safe because the gaseous products of metabolism through the collecting manifold are directed to the first section of the aerobic block, which is especially important when placing the facility indoors. The ability to clean sewage from a wide range of contaminants using the invention

provides the versatility of the plant for its use in order to purify various in composition industrial, agricultural and domestic waste waters from dissolved organic matter.

Claims (2)

Claims 1. A microbiological purification plant for intramundane waters, comprising an anaerobic water treatment unit with a heating system and an aerobic water treatment unit with an aeration system, made of a series of adjacent communicating sections, having a load of synthetic material, characterized in that the purpose of increasing the degree of purification, versatility, convenience and safety in operation, the sections of the anaerobic unit are made in the form of sequentially communicating vertical pipes, each pair of which is provided with top of the each section of the aerobic unit is made of a working compartment with a system of perforated air supply lines for regeneration and an aeration compartment, the ratio of the working volume of the anaerobic unit to the working volume of the aerobic unit is 1: (2.5-3.5), bottom aerobic block is located at an angle of 10-15 ° in the direction of the aeration compartment. 2. Installation according to claim 1, characterized in that the loading of the anaerobic sections is made in the form of ruffs, and the loading of the working zones of aerobic sections - in the form of vii laid on the contact frames. races Table 1 table 2 Table 3 L 20 .13 JKuduffK //, EIDDDYU No. & 8YA go nineteen 20, isasssa  Vftftfo oaooraf fmpwp : uk oooooa .17