WO2020093643A1

WO2020093643A1 - System and method for treating black and odorous river channel sewage

Info

Publication number: WO2020093643A1
Application number: PCT/CN2019/078642
Authority: WO
Inventors: 武涛; 王聪; 王丽; 史鑫; 吴迪; 许盛凯
Original assignee: 江苏澳洋生态园林股份有限公司
Priority date: 2018-11-06
Filing date: 2019-03-19
Publication date: 2020-05-14
Also published as: CN109231711B; CN109231711A

Abstract

Disclosed is a system for treating black and odorous river channel sewage, comprising a pretreatment device, a carbon fluidized bed, a solid-liquid separation apparatus, a biological adsorption tank, an aerobic tank, a catalytic oxidation tank, and an effluent tank, which are arranged successively, wherein the solid-liquid separation apparatus is connected with a carbon regeneration apparatus, the carbon regeneration apparatus is connected with the carbon fluidized bed, and the biological adsorption tank is further connected with a fermentation tank. After being adsorbed in the biological adsorption tank, sludge is transported to the fermentation tank for fermentation, and after fermentation is finished, a portion of the sludge is refluxed to the biological adsorption tank for a further adsorption treatment, and the supernatant in the biological adsorption tank is transported to the aerobic tank for treatment.

Description

Black and smelly river sewage treatment system and method

Technical field

The invention relates to the technical field of sewage treatment, in particular to a black smelly river sewage treatment system and a black smelly sewage treatment method.

Background technique

The "Water Pollution Prevention Action Plan" issued by the State Council sets out clear requirements for the treatment of black and odorous water bodies: By 2020, the black and odorous water bodies in prefecture-level and above urban built-up areas will be controlled within 10%; by 2030, the urban built-up areas The black and odorous water body was eliminated.

The main cause of black odor in the water body is that exogenous organic matter and ammonia nitrogen consume oxygen in the water. When the dissolved oxygen drops to a too low level, a large amount of organic matter is further decomposed under the action of anaerobic bacteria, producing hydrogen sulfide, amine, ammonia and other Odor and volatile small molecule compounds, which emit odor; at the same time, under anaerobic conditions, methane, nitrogen and hydrogen sulfide generated in the sediment are insoluble in water and carry sludge into the water during the ascent Phase, making the water body black.

At present, the commonly used treatment methods are artificial aeration, sediment dredging and water transfer. However, these methods have long purification cycles, poor treatment effects, basically no cure for the symptoms, and relatively high treatment costs, which are difficult to apply for a long time.

CN105923926A uses carbon separation device, biological pool of MBR process and membrane pool of MBR process to treat black and odorous sewage to obtain better treatment effect, but it is difficult to use on a large scale due to its high treatment cost, low efficiency, high equipment cost and other issues, and The use of this method is difficult to effectively and effectively treat sewage in black and smelly rivers.

CN107673561B is to set up a diversion wall body in situ in the river channel, and set up a variety of treatment tanks for comprehensive treatment. Although this method can integrate the advantages of multiple treatment processes, setting up the diversion wall in the river channel will affect the river's flood discharge capacity and at the same time. The cost of the project is high and it is difficult to handle it flexibly.

Summary of the invention

The invention overcomes the defects of the black and smelly river sewage treatment in the prior art, and provides a black and smelly river sewage treatment system and method. The sewage in the black and smelly river is extracted into the system through the pipeline, and the black The large volume of impurities in the smelly river sewage is removed, and then passed into the carbon fluidized bed, and the fluid in the carbon fluidized bed is sent to the solid-liquid separation device for solid-liquid separation. The solid after solid-liquid separation is subjected to carbon regeneration, and the liquid is sent. Into the biological adsorption tank for adsorption, solid-liquid separation of the mixed liquid in the biological adsorption tank, and then anaerobic fermentation of sludge, after the fermentation is completed, return to the biological adsorption tank to continue adsorption, and the supernatant is passed into the biochemical reaction tank and / or The catalytic oxidation pool is discharged into the black and smelly river channel after the treatment.

A black and odorous river sewage treatment system, including a pretreatment device, a carbon fluidized bed, a solid-liquid separation device, a biological adsorption tank, an aerobic tank, a catalytic oxidation tank, and an outlet pool, which are connected to carbon The regeneration equipment and the carbon regeneration equipment are connected to a carbon fluidized bed. The biological adsorption tank is also connected to a fermentation tank. After adsorption in the biological adsorption tank, the sludge is transported to the fermentation tank for fermentation. After the fermentation is completed, part of the sludge is returned to the biological adsorption tank to continue adsorption Treatment, the supernatant in the biological adsorption tank is sent to the aerobic tank for processing.

Further, the system is also provided with a carbonization device, and the sludge after fermentation in the fermentation tank is partially transferred to the carbonization device for carbonization;

Further, the carbonization equipment is connected to a carbon fluidized bed;

Further, the sludge in the biological adsorption tank is produced by selecting and enriching indigenous microorganisms in black and smelly river sewage as strains for enrichment cultivation;

Further, the aerobic tank is connected to the outflow tank, and part of the sludge in the aerobic tank is transported to the outflow tank, and discharged into the black and smelly river channel with the outflow of the outflow tank;

Further, the fermentation tank is connected to the outflow tank, and part of the sludge in the fermentation tank is transferred to the outflow tank, and discharged into the black and smelly river channel with the outflow of the outflow tank;

Further, a surfactant is added to the biological adsorption tank, and the surfactant is a biological surfactant, such as rhamnolipid;

Further, cast iron particles are added to the catalytic oxidation tank, and hydrogen peroxide is added. The cast iron particles include iron, carbon, copper, and cerium, and the weight ratio is 65-80: 5-25: 5: 0.5;

Further, a ferrous source is added to the catalytic oxidation pool;

Further, the sludge generated in the catalytic oxidation tank is sent to the carbonization equipment to be carbonized with the sludge generated in the fermentation tank;

Further, based on the quality of wastewater, aerobic tanks, carbonization equipment, and carbon regeneration equipment can be omitted;

Further, the system can be set on a mobile device for maneuvering the black and smelly river course.

A black and smelly river sewage treatment method includes the following steps:

1) Extract the black and smelly river sewage into the pretreatment device, the coarse grid filters out the large-size slag in the water body, and the fine grid further removes smaller impurities;

2) After filtering through the pretreatment device, it enters the carbon fluidized bed. The sewage and the carbon particles in it are fully mixed and homogenized to produce adsorption. After 15-60 minutes, the mixture in the carbon fluidized bed is sent to the solid-liquid separation device, and the carbon is regenerated. The carbon in the equipment and / or carbonization equipment is sent to the carbon fluidized bed to continue adsorption;

3) The carbon separated by the solid-liquid separation equipment is sent to the carbon regeneration equipment, and the supernatant is sent to the biosorption tank, which is filled with sludge produced by the enrichment and cultivation of indigenous microorganisms in the black and smelly river sewage as strains , The residence time is 20-80min;

4) The supernatant in the biological adsorption tank is sent to the aerobic tank, and the remaining sludge is sent to the fermentation tank for fermentation treatment. After the fermentation, part of the sludge is returned to the biological adsorption tank to continue the adsorption treatment;

5) Part of the sludge in the aerobic tank returns to the biological adsorption tank, and the effluent from the aerobic tank is sent to the catalytic oxidation tank, and the effluent from the catalytic oxidation tank enters the outlet tank and is discharged.

Further, a ferrous source is added to the catalytic oxidation pool;

It can be seen from the above solutions that the present invention is a black and smelly river sewage treatment system and method, which has a simple structure and convenient operation, can quickly and easily reduce the concentration of pollutants in the black and smelly water body, and has a long-lasting and lasting effect on the black and smelly river sewage treatment Compared with the traditional treatment process, the treatment efficiency has the following advantages:

1. Carry out two-stage adsorption of black and odorous water by carbon fluidized bed and biological adsorption pool, most of the pollutants are adsorbed;

2. The sewage after the adsorption treatment is aerobic and catalytic, so that the water quality can be discharged after reaching the discharge standard;

3. The use of indigenous microorganisms in black and smelly river sewage as the source of bacteria will not bring microbial ecological risks to the treatment area;

4. A small amount of sludge is added to the drainage to improve the self-purification ability of the water body, which is an effective method for purifying the black and smelly river sewage.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of a black and smelly river sewage treatment system of the present invention;

detailed description

The present invention will be further described in detail through the following examples, so that those skilled in the art can implement it by referring to the text of the description.

It should be understood that the terms such as “having”, “including” and “including” used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

Example 1

A black and smelly river sewage treatment method includes the following steps:

2) After filtering through the pretreatment device, it enters the carbon fluidized bed. The sewage and the carbon particles in it are fully mixed and homogenized to produce adsorption. After 45 minutes, the mixture in the carbon fluidized bed is sent to the solid-liquid separation equipment, the carbon regeneration equipment and / Or the carbon in the carbonization equipment is sent to the carbon fluidized bed to continue adsorption;

3) The carbon separated by the solid-liquid separation equipment is sent to the carbon regeneration equipment, and the supernatant is sent to the biosorption tank, which is filled with sludge produced by the enrichment and cultivation of indigenous microorganisms in the black and smelly river sewage as strains , Residence time 60min;

5) Part of the sludge in the aerobic tank returns to the biological adsorption tank, the aerobic tank effluent is sent to the catalytic oxidation tank, and the catalytic oxidation tank effluent is discharged into the pond;

A surfactant is added to the biological adsorption tank, the surfactant is a biological surfactant, such as rhamnolipid, cast iron particles are added to the catalytic oxidation tank, and hydrogen peroxide is added, and the cast iron particles include iron and carbon , Copper and cerium, the weight ratio of 70: 15: 5: 0.5, the sludge generated in the catalytic oxidation tank is sent to the carbonization equipment, and the sludge generated in the fermentation tank is carbonized.

Example 2

Water quality of black and smelly sewage in a river: COD is 258mg / L; total phosphorus is 4.18mg / L; ammonia nitrogen is 11.35mg / L; dissolved oxygen is 0.27mg / L; transparency is 10cm; SS (suspended matter) is 214.4mg / L.

Fluidized bed treatment: COD after adsorption is 158mg / L; total phosphorus 3.58mg / L; ammonia nitrogen 6.35mg / L; transparency 2cm; SS (suspended matter) 65mg / L;

Biological adsorption tank: COD is 98mg / L after adsorption; total phosphorus 2.18mg / L; ammonia nitrogen 4.13mg / L; transparency is 2cm; SS (suspended matter) is 76mg / L;

Aerobic tank: COD after aerobic treatment is 78mg / L; total phosphorus 1.38mg / L; ammonia nitrogen 1.65mg / L;

Catalytic oxidation tank: COD after catalytic oxidation is 34mg / L; total phosphorus 0.67mg / L; ammonia nitrogen 0.73mg / L.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this document, but should conform to the widest scope consistent with the principles and novel features disclosed in this document.

Claims

A black and smelly river sewage treatment system, characterized in that it includes a pretreatment device, a carbon fluidized bed, a solid-liquid separation device, a biological adsorption tank, an aerobic tank, a catalytic oxidation tank and an outlet tank arranged in this order. The separation device is connected to a carbon regeneration device, the carbon regeneration device is connected to a carbon fluidized bed, and the biological adsorption tank is also connected to a fermentation tank. After the adsorption in the biological adsorption tank, the sludge is transported to the fermentation tank for fermentation. After the fermentation is completed, part of the sludge is returned to the biological The adsorption tank continues the adsorption treatment, and the supernatant in the biological adsorption tank is sent to the aerobic tank for treatment.
The system according to claim 1, wherein a carbonization device is further provided in the system, and the sludge after fermentation in the fermentation tank is partially transferred to the carbonization device for carbonization.
The system of claim 2, wherein the carbonization device is connected to a carbon fluidized bed.
The system according to claim 1, wherein the sludge in the biological adsorption tank is produced by selecting and enriching indigenous microorganisms in the sewage of the black and odorous river as a bacterial strain.
The system according to claim 1, wherein the aerobic tank is connected to the outlet tank, and part of the sludge in the aerobic tank is transported to the outlet tank, and discharged into the black and smelly river channel with the outlet water of the outlet tank;

Preferably, the system may be set on a mobile device for maneuvering the black and smelly river channel.
The system according to claim 1, wherein the fermentation tank is connected to the outlet tank, and part of the sludge in the fermentation tank is transported to the outlet tank, and discharged into the black and odorous river channel with the outlet tank outlet water.
The system according to claim 1, wherein a surfactant is added to the biological adsorption tank, and the surfactant is a biological surfactant, such as rhamnolipid.
The system of claim 1, wherein cast iron particles are added to the catalytic oxidation tank and hydrogen peroxide is added, the cast iron particles include iron, carbon, copper and cerium, and the weight ratio is 65-80: 5- 25: 5: 0.5.
Using the sewage treatment method of the black and smelly river sewage treatment system of claim 1,

It includes the following steps:

1) Extract the black and smelly river sewage into the pretreatment device, the coarse grid filters out the large-size slag in the water body, and the fine grid further removes smaller impurities;

2) After filtering through the pretreatment device, it enters the carbon fluidized bed. The sewage and the carbon particles in it are fully mixed and homogenized to produce adsorption. After 15-60 minutes, the mixture in the carbon fluidized bed is sent to the solid-liquid separation device, and the carbon is regenerated. The carbon in the equipment and / or carbonization equipment is sent to the carbon fluidized bed to continue adsorption;

3) The carbon separated by the solid-liquid separation equipment is sent to the carbon regeneration equipment, and the supernatant is sent to the biosorption tank, which is filled with sludge produced by the enrichment and cultivation of indigenous microorganisms in the black and smelly river sewage as strains , The residence time is 20-80min;

4) The supernatant in the biological adsorption tank is sent to the aerobic tank, and the remaining sludge is sent to the fermentation tank for fermentation treatment. After the fermentation, part of the sludge is returned to the biological adsorption tank to continue the adsorption treatment;

5) Part of the sludge in the aerobic tank returns to the biological adsorption tank, and the effluent from the aerobic tank is sent to the catalytic oxidation tank, and the effluent from the catalytic oxidation tank enters the outlet tank and is discharged.
The method according to claim 9, wherein the fermentation tank is connected to the outflow tank, and part of the sludge in the fermentation tank is transported to the outflow tank, and discharged into the black and smelly river channel with the outflow of the outflow tank.