RU2656025C1 - Module for biological wastewater treatment - Google Patents

Abstract

FIELD: water and air purification technology.

SUBSTANCE: invention relates to wastewater treatment systems and can be used to purify water from surfactants, organic contaminants, suspended solids and nitrogen compounds. In the method, the module for biological wastewater treatment includes housing 1, with first 2 and second settling chambers 3, located therein, bioreactor 4 with carrier material 41 for forming attached biocoenosis, system of water saturation with air oxygen – sprinkler 5, pipeline 6 for removal of purified water from the second chamber 3 and recirculated flow line 7 with circulation pump 8 immersed in second settling chamber 3. Housing 1 of the module is configured to be immersed in a sewage well to form chamber 10 after the installation, which is formed by the space between the walls of the well and housing 1 of the module, which serves for reception of wastewater and its equalization. In housing 1 of the module, opening 11 for overflowing into first settling chamber 2, located on the outside of housing 1, is formed.

EFFECT: invention makes it possible to provide the possibility of its installation in a sewage well with the maximum use of the volume of the sewage well, as well as the modernization of the existing treatment facilities, performed as a series of consecutively connected wells with overflows.

4 cl, 3 dwg

Description

FIELD OF THE INVENTION

The invention relates to wastewater treatment systems, namely, modules for biological wastewater treatment, and can be used for wastewater treatment from surfactants, organic contaminants, suspended solids and nitrogen compounds. When a coagulant is added to wastewater, the described module is able to purify wastewater from phosphorus compounds.

The following terms are used in this description.

Bioreactor (biological reactor) is a wastewater treatment device that uses biological processes to process or utilize contaminants.

The carrier material (biological loading), the loading material is the base material for the formation of the attached biocenosis formed by colonies of microorganisms, bacteria and fungi.

A system for saturating water with oxygen or air is a set of elements that supply oxygen or air inside the bioreactor chamber. A typical option is a set of aeration pipes with holes, a set of aerators (membrane, ceramic, etc.) into which oxygen or air is supplied by a pump or compressor. It can also be performed using a sprinkler and / or ejector and / or saturator.

Sewer well - a sewage well with reinforced walls, usually consisting of concrete rings mounted on top of each other. In general, it can be any well.

State of the art

The problem to which the present invention is directed is that the existing modules for biological wastewater treatment are separate devices that include three chambers. To commission such devices, it is necessary to dig a hole and install them in the ground, which is very difficult. Accordingly, for repair or replacement, it is necessary to dig out this entire device, which usually takes several cubic meters. If you use natural existing wells, for example sewer, then you can install there only a small module for biological wastewater treatment, which is limited by the diameter of the well or the hole in its cover and the outer diameter of the treatment device. The space that remains between the outer wall of the module and the wall of the well itself forms an unused volume. In other words, often to install a module with the required performance, the size of the well is not enough just because of the mandatory presence of this unused parasitic volume.

The closest analogue taken as a prototype to the invention is Yu. A. Svistunov, “Sewage and wastewater treatment” (part III), “Sewage treatment of rural settlements”, Lecture course for students majoring in “Agricultural water supply engineering systems, irrigation and water disposal ", Krasnodar, Cub. GAU, 2009, p. 68-72, fig. - MicroFAST wastewater treatment systems). A known module for biological wastewater treatment includes a housing in which a bioreactor with a carrier material for forming an attached biocenosis is located, and a system for saturating water with atmospheric oxygen.

Its disadvantage is the impossibility of installing it in a sewer well so that the volume of the sewer well is used to the maximum.

Disclosure of invention

The present invention mainly aims to offer a module for biological wastewater treatment, includes a housing that includes a bioreactor with a carrier material for forming an attached biocenosis, a system of saturation of water with atmospheric oxygen, which allows at least one to smooth out at least above the disadvantages, namely, to ensure the possibility of installing it in the sewer well with maximum use of the volume of the sewer well, the ability to upgrade existing sewage treatment plants weapons made as a series of sequentially interconnected wells with overflows, which is a technical problem, the solution of which the present invention is directed.

To achieve this goal, the first and second settling chambers are located in the housing, the module including an irrigator distributing wastewater to the carrier material, a purified water drain pipe from the second chamber and a recirculated flow pipe with a circulation pump immersed in the second settling chamber, the module housing made with the possibility of immersion in the sewer well with the formation after installation in the well of the chamber, formed by the space between the walls of the well and the housing of the module, which serves to I receive wastewater and their averaging, and the module case has a hole for overflow into the first settling chamber located on the outside of the case.

Thanks to such advantageous characteristics, it becomes possible to install the proposed module in an existing sewer well. In this case, the entire volume of such a well will be used as a receiving chamber, in which the remaining parts of the treatment plant will be located. That is, such a solution allows you to use part of the internal volume of the finished well, as a technological stage, and use it as a receiving chamber. All this makes it possible to greatly simplify the installation process of such treatment equipment, as well as its possible dismantling, repair and replacement.

There is also an embodiment of the invention in which the module housing has an annular portion adapted to the hole size of the sewer well with the possibility of using the module as a cover for the sewer well.

Due to this advantageous characteristic, it becomes possible to use the proposed module as a cover for a sewer well.

There is another variant of the invention, in which the module for biological wastewater treatment contains a control unit for a circulation pump connected to a circulation pump.

Thanks to this advantageous characteristic, it becomes possible to control the circulation pump and set the frequency of its operation.

Finally, there is a variant of the invention in which the module for biological wastewater treatment contains an automatic coagulant dispenser.

Thanks to this advantageous characteristic, it becomes possible to automatically dose the coagulant.

The set of essential features of the invention is unknown from the prior art for devices of similar purpose, which allows us to conclude that the criterion of "novelty" for the invention. The very idea of forming one of the necessary chambers is outside the module, the possibility of using a ready-made sewer well for this is not very obvious, for decades of using such devices no one could guess before that, which allows us to conclude that the criterion of “compliance with the inventive step” for the invention is met.

Brief Description of the Drawings

Other distinguishing features and advantages of the invention clearly follow from the description below for illustration and not being restrictive, with reference to the accompanying drawings, in which:

- figure 1 schematically depicts the appearance of a module for biological wastewater treatment, according to the invention;

- figure 2 schematically depicts a sectional view of a module for biological wastewater treatment, according to the invention;

- figure 3 schematically depicts the steps of the module for biological wastewater treatment, according to the invention.

According to figures 1-2, the module for biological wastewater treatment includes a housing 1, in which the first 2 and second 3 settling chambers are located, a bioreactor 4 with carrier material 41 to form an attached biocenosis, a system for saturation of water with atmospheric oxygen, the figures show how the irrigator 5, distributing wastewater to the carrier material, a pipe 6 for discharging purified water from the second settling chamber 3 and a recirculating flow pipe 7 with a circulation pump 8 immersed in the second settling chamber 3, the module housing 1 is immersed in the sewer well 9 (shown in the form of concrete rings 9 mounted on top of each other) with the formation after installation in the well of the chamber 10, formed by the space between the walls of the well 9 and the housing 1 of the module, which serves to receive wastewater and their averaging, and the housing 1 of the module has an opening 11 for overflow into the first settling chamber 2 located on the outside of the housing.

The module case has an annular section 12, specially adapted to the size of the opening of the sewer well.

The biological wastewater treatment module may include a circulation pump control unit connected to the circulation pump. It can be located both inside the case and outside, that is, to be both internal and external. Not shown in the figures.

The biological wastewater treatment module may include an automatic coagulant dispenser. It can be located both inside the case and outside, that is, to be both internal and external. Not shown in the figures.

The direction of gravity is shown as vector g. It is in relation to it that the adjectives “upper” and “lower” are used.

Also shown:

arrows - the direction of flow of wastewater,

13 - hole for self-draining

14 - drain input

15 - pipe for pumping the receiving chamber

The bioreactor can be located inside the volume of the well, but can also be located above ground level. It does not have to be immersed in concrete rings.

The implementation of the invention

The module for biological wastewater treatment is used as follows. An example of the use of the invention is provided, which is descriptive and does not limit the application of the invention.

Stage A1. Wastewater through the sewage supply pipe 14 for processing is fed into the sewer well 9.

Stage A2. As soon as the wastewater level reaches the opening for entering the first settling chamber 2, the wastewater enters the module.

Stage A3. Inside module 1, the wastewater is treated through biological reactions on a biocenosis, mainly located on the carrier material 41, the biocenosis of the carrier material consumes biodegradable contaminants in the wastewater, thereby purifying it.

Stage A4. To ensure oxidative processes that occur during the nutrition of colonies of microorganisms, bacteria and fungi, the wastewater inside the bioreactor is enriched with air or oxygen.

Stage A5. Heavy impurities (activated sludge collected in the sump, particles of detached biomass and other suspended solids) sink down to the bottom of well 9, and the cleaned ones are removed from the module through line 6.

Stage A6. Internal recirculation, as well as the supply of wastewater to the bioreactor, is due to the circulation pump 8, immersed in the second settling chamber 3 and operating in a pulsating mode. As a circulation pump, a drainage pump may be used.

The steps are exemplary and do not limit the use of the invention.

Industrial applicability

The proposed module for biological wastewater treatment has a clear purpose, can be carried out by a specialist in practice and, when implemented, ensures the implementation of the declared purpose. The possibility of being implemented by a specialist in practice follows from the fact that for each feature included in the claims, based on the description, the material equivalent is known, which allows us to conclude that the criterion of "industrial applicability" for the invention is met, as well as the criterion of "completeness of description" for the invention .

In accordance with the proposed invention, on behalf of the applicant Alta Group LLC, a prototype module for biological wastewater treatment was manufactured.

The trial operation of this invention has shown that it allows you to provide:

- installing it in a finished sewer or similar well,

- the possibility of biological wastewater treatment,

- maximum use of the volume of the sewer well.

Thus, due to the fact that the module includes a housing in which the first and second settling chambers are located, a bioreactor with a carrier material for the formation of an attached biocenosis, a system of saturation of water with atmospheric oxygen, an irrigation system that distributes wastewater to the carrier material, and a purified water discharge pipe from the second chamber and a recirculated flow pipe with a circulation pump immersed in the second settling chamber, the module housing being configured to be immersed in a sewer well with the formation after installation in the well of the chamber, formed by the space between the walls of the well and the module casing, which serves to receive wastewater and their averaging, and the module casing has a hole for overflow into the first settling chamber located on the outside of the casing and the technical result is achieved, namely: the possibility of installing it in the sewer well with maximum use of the volume of the sewer well, as well as the modernization of existing treatment facilities, made as a series of followers Well interconnected wells with overflows.

Additional technical result achieved:

- easy dismantling of the module, repair of its parts, entire replacement,

- Modernization of existing cleaning systems made of sequentially connected wells with overflows.

Claims (4)

1. A module for biological wastewater treatment, including a housing, a bioreactor with a carrier material for forming an attached biocenosis, a system for saturating water with atmospheric oxygen, characterized in that the first and second settling chambers are located in the housing, the module including an irrigation device that distributes the wastewater to carrier material, a purified water discharge pipe from the second chamber and a recirculated flow pipe with a circulation pump immersed in the second settling chamber, the module housing being made n with the possibility of immersion in the sewer well with the formation after installation in the well of the chamber, formed by the space between the walls of the well and the module body, which serves to receive wastewater and their averaging, and the module body has an opening for overflow into the first settling chamber located on the outside of the body . 2. The module according to claim 1, characterized in that the module housing has an annular section adapted to the hole size of the sewer well with the possibility of using the module as a cover for the sewer well. 3. The module according to claim 1, characterized in that it comprises a control unit for the circulation pump connected to the circulation pump. 4. The module according to claim 1, characterized in that it contains an automatic coagulant dispenser.

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