RU2699627C2 - Method for intensifying biological waste water treatment processes using activated sludge as nutrient medium for em-biopreparations - Google Patents

Abstract

FIELD: water supply; sewerage.

SUBSTANCE: invention can be used in environmental protection during treatment of domestic and industrial waste water. Method is realized by preliminary preparation of biopreparation in nutrient medium with further introduction of waste water and biopreparation into aerotank. Nutrient medium for the EM-biopreparation is represented by active sludge from the aerobic and anaerobic zones of the aerotank in different reservoirs - reservoirs for aerobic stabilization of activated sludge with forced aeration and reservoirs for anaerobic stabilization of activated sludge without oxygen access for formation of two qualitatively different types of biomass. Ratio of EM-biopreparation and active sludge is 1:100, supply of stabilized active sludge into corresponding zones of aerotank is carried out on basis of 1 l of mixture of waste water and active sludge per 1 m³ raw waste water.

EFFECT: invention provides intensification of operation of process scheme of biological treatment of waste water, increased biomass of microorganisms, reduced time of adaptation of biopreparation microorganisms to varying conditions of food sources, fusion of cenoses of biopreparation and activated sludge at stage of aging of working solution.

1 cl, 1 dwg

Description

The method relates to the field of environmental protection and can be used in the biological treatment of domestic and industrial wastewater.

Currently, most industrial and domestic wastewaters are subjected to biological treatment before they are discharged into water bodies. The biological method is based on the use of specific biological communities, bearing the general name of activated sludge (https://ru.m.wikipedia.org/wiki/Аktive_il). The use of activated sludge to remove impurities from water is based on the unique ability of microorganisms to utilize not only those substrates that are optimal and thus familiar, but also a huge amount of other substances, including synthetic ones, including those that were previously absent in nature.

The closest in technical essence and the achieved result to the claimed method is a method of using biological products, which are introduced in the form of a solution (www.vtorgeo.com/aqua).

A solution is prepared in a room with an internal air temperature of at least + 10 ° C.

Method of solution preparation: tap water at room temperature is poured into a plastic container. Slowly and carefully pour 1 packet of the drug into a container of water. The contents of the plastic container is stirred with a clean plastic or wooden handle. Then tap water of room temperature is added to the full volume of the container, the contents are mixed again. Without closing the plastic container, the solution is left for 24 hours to awaken microorganisms. After that, the solution is ready for use. When the preparation ends, in another (reserve capacity) the preparation is prepared for further work, etc.

A disadvantage of the known prototype is that before using the biological product it is necessary to prepare a solution in tap water. As a result, the increase in biomass during the preparation of the solution is very difficult due to the lack of nutrients in the solution. After the solution is introduced into the aeration tank, it takes some time to adapt the microorganisms of the biological product to the changed conditions: new food sources and abiotic factors, the merging of the cenoses of the biological product and activated sludge. To prepare a new portion of the solution, it is proposed to use a new package of biological product.

The objective of the present invention is to provide a method of intensification of biological wastewater treatment processes using activated sludge from aeration tank as a nutrient medium for EM biological products.

The task is achieved by constructing a technological scheme providing:

- an increase in the biomass of microorganisms in the working solution for 1 day;

- reducing the time of adaptation of microorganisms of the biological product to the changing conditions of new food sources;

- the merger of coenoses of biological product and activated sludge at the stage of maturation of the working solution.

The essence of this invention lies in the fact that in the method of intensification of biological wastewater treatment, including the use of a pre-prepared biological product in a nutrient medium, followed by the introduction of wastewater and a biological product in an aeration tank equipped with a piping system, according to the invention, an EM biological product is used as a nutrient media use activated sludge from the aerobic and anaerobic zones of the aeration tank in different containers - containers for aerobic stabilization of activated sludge with forced aeration it and tanks for anaerobic stabilization of activated sludge without oxygen access for the formation of two qualitatively different types of biomass, while the ratio of the EM biological product to activated sludge is 1: 100, stabilized activated sludge is supplied to the corresponding zones of the aeration tank at the rate of 1 liter of wastewater mixture and activated sludge per 1 m ^{3 of} untreated wastewater.

The drawing shows a diagram of a method of intensifying the processes of biological wastewater treatment using activated sludge as a nutrient medium for EM biological products, where:

1 - aerobic zone of the aeration tank;

2 - anaerobic zone of the aeration tank;

3 - pipeline;

4 - pipeline;

5 - capacity for aerobic stabilization of activated sludge with forced aeration;

6 - capacity for anaerobic stabilization of activated sludge without oxygen;

7 - pipeline;

8 - capacity with an EM-biological product;

The method of intensification of the biological wastewater treatment using activated sludge as a nutrient medium for EM biological products is as follows.

From the aerobic zone of the aeration tank 1 and the anaerobic zone 2, the sludge mixture is fed through a pipe 3 and a pipe 4 to a container for aerobic stabilization of activated sludge with forced aeration 5 and to a tank for anaerobic stabilization of activated sludge without oxygen 6, then to each tank through a pipeline 7, a biological product is supplied from a container with an EM biological product 8; the ratio of an EM biological product to activated sludge is 1: 100. The capacity for aerobic stabilization of activated sludge with forced aeration 5 and the capacity for anaerobic stabilization of activated sludge without oxygen 6 are heated no more than 20-30 ° C. During the maturation of the solution, the biocenoses of activated sludge and biological product merge, the mass of the combined cenosis increases due to high concentrations of organic compounds in wastewater, and favorable abiotic factors. The use of a mixture of wastewater and activated sludge as a nutrient medium allows you to adapt the microorganisms of the biological product to the changed power sources. After maturation, stabilized aerobic and anaerobic activated sludge is supplied through line 3 from the tank for aerobic stabilization of activated sludge with forced aeration 5, and through line 4 from the tank for anaerobic stabilization of activated sludge without oxygen 6 to the corresponding aerobic zones of the aeration tank 1 and anaerobic zones of the aeration tank 2 , at the rate of 1 liter of mixture per 1 m ^{3 of} untreated wastewater. It is proposed to introduce this solution as wastewater arrives for treatment. The preparation of a new portion of the solution, in order to save biological product, can be made from the remnants of the mixture prepared previously.

The technical result is an acceleration of the process of formation of two qualitatively different types of biomass (by species composition of microorganisms) aerobic and anaerobic, and as a result, an increase in the rate of wastewater treatment.

INFORMATION SOURCES:

1. https://ru.ni.wikipedia.org

2. www.vtorgeo.com/aqua

Claims (1)

A method of intensifying biological wastewater treatment processes, including the use of a pre-prepared biological product in a nutrient medium, followed by the introduction of wastewater and a biological product into an aeration tank equipped with a piping system, characterized in that they use an EM biological product, using activated sludge from aerobic and anaerobic as a nutrient medium zones of aeration tank in different containers - tanks for aerobic stabilization of activated sludge with forced aeration and tanks for anaerobic stabilization of active sludge without oxygen for the formation of two qualitatively different types of biomass, while the ratio of EM-biological product and activated sludge is 1: 100, the supply of stabilized activated sludge to the corresponding zones of the aeration tank is carried out at the rate of 1 l of a mixture of wastewater and activated sludge per 1 m ³ untreated wastewater.

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