CN214192726U

CN214192726U - Biological denitrification wastewater treatment device

Info

Publication number: CN214192726U
Application number: CN202023113665.3U
Authority: CN
Inventors: 吴渤; 陈祥衡; 石杨; 王青龙; 王小广; 徐若飞; 朱淼
Original assignee: Shenzhen Zhongke Outaihua Environmental Protection Technology Co ltd
Current assignee: Shenzhen Zhongke Outaihua Environmental Protection Technology Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-09-14
Anticipated expiration: 2030-12-22

Abstract

The utility model discloses a biological denitrification wastewater treatment device, which comprises a comprehensive wastewater tank (1), an anaerobic tank (2), an anoxic tank (3), a primary aerobic tank (4), a secondary aerobic tank (5), a tertiary aerobic tank (6) and a subsequent treatment tank (7) which are connected in sequence; the primary aerobic tank (4) is connected with a carbon source container (8), and the tertiary aerobic tank (6) is also connected with the anoxic tank (3) through a return pipeline. Adopt the device reduces the treatment cost, also avoids the secondary pollution problem to the environment, and is a new technology for wastewater treatment.

Description

Biological denitrification wastewater treatment device

Technical Field

The utility model relates to a waste water treatment field especially relates to a biological denitrification handles effluent plant.

Background

In the sewage treatment of China, the treatment of the wastewater containing ammonia and nitrogen is always an important object. With the continuous development of economic construction in China, the PCB industry is rapidly developed. However, in the production process of the circuit board, a large amount of ammonia nitrogen is generated in both the alkaline etching process and the sodium persulfate system microetching process, so that the concentration of the ammonia nitrogen in the wastewater is as high as 180ppm, and the wastewater needs to be effectively treated and discharged for environmental protection.

Although the sewage treatment industry in China is rapidly developed along with the reform and the development, a plurality of lagged process technologies still exist. The treatment for removing ammonia nitrogen from the waste water produced in the production of circuit boards is generally carried out by adopting a breaking point chlorination (bleaching) method of a physical-chemical method. Although the method can also make the ammonia nitrogen of the wastewater reach the standard, a large amount of irritant gas is generated in the process of adding the rinsing water, so that the secondary pollution to the environment is caused, and the operation cost of wastewater treatment reaches 3-5 yuan/ton of water, which is a great waste.

The problem of the treatment method for the wastewater containing ammonia nitrogen in the production of circuit boards is not thoroughly solved, so that enterprises feel very headache, and the treatment method also becomes a difficult problem for the treatment of the industrial wastewater containing ammonia nitrogen. In order to solve the problems associated with the treatment of industrial wastewater containing ammonia and nitrogen, a research on a new biological process is urgently needed, especially a research on the treatment of industrial wastewater containing ammonia and nitrogen. In the treatment of the wastewater containing ammonia nitrogen in the production of the circuit board, no precedent and no matched device exist so far.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a technique is according to the defect of the former materialization method processing technology of circuit board production ammonia nitrogen containing waste water, provides a biological denitrification and handles waste water device and handles waste water, not only can solve the problem that the processing industry contains ammonia nitrogen waste water carbon source not enough, simultaneously, can also adjust the pH value in the waste water, has reached the purpose of a thing dual-purpose, need not adjust alone, thoroughly changes former processing technology. In the waste water treatment, adopt the utility model discloses a device realizes the denitrogenation through various reactions, through subsequent processing again, discharge to reach standard.

The utility model discloses a biological denitrification wastewater treatment device, which comprises a comprehensive wastewater tank, an anaerobic tank, an anoxic tank, a primary aerobic tank, a secondary aerobic tank, a tertiary aerobic tank and a subsequent treatment tank which are connected in sequence;

the first-stage aerobic tank is connected with the carbon source container, and the third-stage aerobic tank is also connected with the anoxic tank through a return pipeline.

The biological denitrification wastewater treatment device, wherein, the carbon source container is a new carbon source container.

Biological denitrification handles effluent plant, wherein be provided with first waste water entry and first waste water export on the comprehensive wastewater disposal basin be provided with second waste water entry and second waste water export on the anaerobism pond.

Biological denitrification handles effluent plant, wherein be provided with third waste water entry, third waste water export and backward flow waste water entry on the oxygen deficiency pond it throws the mouth to be provided with fourth waste water entry, fourth waste water export and new carbon source on the good oxygen pond of one-level throw, new carbon source throw mouthful through the pipeline with new carbon source container links to each other.

Biological denitrogenation processing waste water device, wherein be provided with fifth waste water entry and fifth waste water export on the good oxygen pond of second grade be provided with sixth waste water entry, sixth waste water export and backward flow waste water export on the good oxygen pond of tertiary, backward flow waste water export through the backflow pipeline with backward flow waste water entry links to each other, be provided with seventh waste water entry and seventh waste water export on the follow-up processing pond.

The biological denitrification wastewater treatment device of the utility model is characterized in that the primary aerobic tank, the secondary aerobic tank and the tertiary aerobic tank are all provided with aeration devices.

The utility model discloses method for biological denitrification handles waste water lies in with prior art difference:

the utility model discloses a biological denitrification handles effluent plant carries out the processing of waste water, is on the basis that has changed former materialization method processing waste water, when guaranteeing that the ammonia nitrogen can be up to standard equally, has solved the secondary pollution problem of environment, has obviously reduced the treatment cost of waste water. The technology for treating the town ammonia nitrogen-containing wastewater by the biological denitrification method is mature, but the treatment effect is influenced by the shortage of carbon source in the treatment process for treating the industrial ammonia nitrogen-containing wastewater, and the technology is not adopted all the time.

Adopt the utility model discloses a device is handled circuit board production and is contained ammonia nitrogen waste water, adopts the new carbon source of new research and development to go on, not only can solve the problem that the industry contains ammonia nitrogen waste water carbon source not enough, simultaneously, can also adjust the pH value in the waste water, need not adjust alone, has played the effect of two gains at a stroke, has thoroughly changed former processing technology's method. Adopt the technology of the utility model to treat the wastewater containing ammonia nitrogen in the circuit board production, still can reduce the project investment by about 50%, in the aspects of stable standard treatment, all have the positive promotion effect. Particularly, the cost of wastewater treatment can be reduced to below 1 yuan per ton of water from 3-5 yuan per ton of water, and is reduced by 2-4 times, so that a new process technology is provided for the wastewater treatment industry, and the method can play an important role in the industry. The utility model discloses so can reach better treatment effect, break former traditional processing technology above all, adopted new carbon source as the nutritional agent, carry out biological denitrification and handle, played very critical effect for the processing of this waste water, just had the new process technology of industrial waste water biological denitrification, could have both reduced the treatment cost when the ammonia nitrogen is up to standard, also avoided the secondary pollution problem to the environment. Under the condition of no precedent, the treatment of the industrial wastewater containing ammonia nitrogen is a diligent attempt, and the problem of wastewater treatment of related enterprises is solved.

Adopt the utility model discloses the waste water treatment method of device not only to the industrial wastewater treatment in the circuit board production process in the PCB industry, stable up to standard, reduce treatment cost, all played very important effect, moreover, still to other water treatment fields, especially to the solution of difficult and complicated problems such as ammonia nitrogen-containing waste water treatment is more concentrated, reduce the investment, energy saving and consumption reduction etc. all have positive promotion effect, reach the advanced level of this waste water treatment process technology.

The following will further explain the biological denitrification wastewater treatment device of the present invention with reference to the attached drawings.

Drawings

FIG. 1 is a schematic structural view of the biological denitrification wastewater treatment device of the utility model.

Detailed Description

Example 1

As shown in fig. 1, the biological denitrification wastewater treatment device of the utility model comprises a comprehensive wastewater tank 1, an anaerobic tank 2, an anoxic tank 3, a primary aerobic tank 4, a secondary aerobic tank 5, a tertiary aerobic tank 6 and a subsequent treatment tank 7 which are connected in sequence; the first-stage aerobic tank 4 is connected with a carbon source container 8, and the third-stage aerobic tank 6 is also connected with the anoxic tank 3 through a return pipeline.

Among them, the carbon source container 8 is preferably a new carbon source container. The comprehensive wastewater tank 1 is provided with a first wastewater inlet and a first wastewater outlet, the anaerobic tank 2 is provided with a second wastewater inlet and a second wastewater outlet, the anoxic tank 3 is provided with a third wastewater inlet, a third wastewater outlet and a backflow wastewater inlet, the primary aerobic tank 4 is provided with a fourth wastewater inlet, a fourth wastewater outlet and a new carbon source feeding port, the new carbon source feeding port is connected with a new carbon source container through a pipeline, the secondary aerobic tank 5 is provided with a fifth wastewater inlet and a fifth wastewater outlet, the tertiary aerobic tank 6 is provided with a sixth wastewater inlet, a sixth wastewater outlet and a backflow wastewater outlet, the backflow wastewater outlet is connected with the backflow wastewater inlet through a backflow pipeline, and the subsequent treatment tank 7 is provided with a seventh wastewater inlet and a seventh wastewater outlet. Aeration devices are arranged in the first-stage aerobic tank 4, the second-stage aerobic tank 5 and the third-stage aerobic tank 6.

A method for biological denitrification treatment of wastewater comprises the following steps:

(A) collecting ammonia nitrogen-containing wastewater of each circuit board production line to a comprehensive wastewater pool 1 for concentration;

(B) sending the wastewater in the comprehensive wastewater tank 1 into an anaerobic tank 2, and removing organic matters in the wastewater by using the action of anaerobic bacteria;

(C) the wastewater in the anaerobic tank 2 is sent into an anoxic tank 3 for hydrolysis reaction, and part of BOD is removed at the same time; the return water sent from the third-stage aerobic tank 6 is mixed to better remove the total nitrogen;

(D) sending the wastewater in the anoxic tank 3 into a primary aerobic tank 4, adding a carbon source on line, adding a catalyst, promoting nitrification and denitrification reactions under aeration, and decomposing organic matters into inorganic matters;

(E) the wastewater in the first-stage aerobic tank 4 is sent into a second-stage aerobic tank 5, further nitrification and denitrification reactions are carried out under aeration, and organic matters are continuously decomposed into inorganic matters;

(F) the wastewater in the second-level aerobic tank 5 is sent into a third-level aerobic tank 6, further nitrification and denitrification reactions are carried out under aeration, and organic matters are continuously decomposed into inorganic matters;

(G) and (3) sending one part of the wastewater in the third-stage aerobic tank 6 into the anoxic tank 3 as reflux water, sending the other part of the wastewater into a subsequent treatment tank 7, and discharging the wastewater after the subsequent treatment reaches the national discharge standard.

The carbon source is a new carbon source, namely a ZK-100 solution with the concentration of 15%, the retention time of the wastewater in the step (B) is 8-11 h, the retention time of the wastewater in the step (C) is 16-20 h, the adding amount of the new carbon source is controlled by the pH value of the wastewater being 7-7.3, meanwhile, the adding amount of the catalyst is 2-3 ppm/t of the wastewater, the reaction retention time after the new carbon source is added is 8-10 h, the reaction retention time in the steps (E) and (F) is 8-10 h, and in the step (G), the flow rate of the wastewater is 3-4 times of the water inflow of the wastewater in the comprehensive wastewater pool.

And (3) biological denitrification wastewater treatment sampling test results: the ammonia nitrogen content is 6.8 mg/L-7.9 mg/L; reduced processing cost: 0.88 yuan/t wastewater to 0.96 yuan/t wastewater.

The new carbon source container is any container capable of realizing on-line solution feeding.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides a biological denitrogenation handles effluent plant which characterized in that: comprises a comprehensive wastewater tank (1), an anaerobic tank (2), an anoxic tank (3), a primary aerobic tank (4), a secondary aerobic tank (5), a tertiary aerobic tank (6) and a subsequent treatment tank (7) which are connected in sequence; the primary aerobic tank (4) is connected with a carbon source container (8), and the tertiary aerobic tank (6) is also connected with the anoxic tank (3) through a return pipeline.

2. The apparatus of claim 1, wherein: the carbon source container (8) is a new carbon source container.

3. The apparatus of claim 2, wherein: the comprehensive wastewater tank (1) is provided with a first wastewater inlet and a first wastewater outlet, and the anaerobic tank (2) is provided with a second wastewater inlet and a second wastewater outlet.

4. The apparatus of claim 3, wherein: a third waste water inlet, a third waste water outlet and a backflow waste water inlet are formed in the anoxic tank (3), a fourth waste water inlet, a fourth waste water outlet and a new carbon source feeding port are formed in the primary aerobic tank (4), and the new carbon source feeding port is connected with the new carbon source container through a pipeline.

5. The apparatus of claim 4, wherein: a fifth wastewater inlet and a fifth wastewater outlet are arranged on the second-stage aerobic tank (5), a sixth wastewater inlet, a sixth wastewater outlet and a backflow wastewater outlet are arranged on the third-stage aerobic tank (6), the backflow wastewater outlet is connected with the backflow wastewater inlet through a backflow pipeline, and a seventh wastewater inlet and a seventh wastewater outlet are arranged on the subsequent treatment tank (7).

6. The apparatus of claim 5, wherein: aeration devices are arranged in the first-stage aerobic tank (4), the second-stage aerobic tank (5) and the third-stage aerobic tank (6).