CN205295089U - Sewage regeneration system - Google Patents

Abstract

The utility model discloses a sewage regeneration system, which comprises a water collection pool, a regulating pool, a hydrolytic acidification pool, an anaerobic pool, anoxic pool, an aerobic pool, a membrane bioreactor, nanofiltration equipment and a disinfection pool; wherein the water pool, The regulating pool, the hydrolytic acidification pool, the anaerobic pool, the anoxic pool, the aerobic pool, the membrane bioreactor, the nanofiltration equipment and the disinfection pool are connected in sequence. The sewage regeneration system also includes a sludge treatment system. The sewage treatment process of the utility model is simple, the operation is convenient, the amount of sludge is greatly reduced, and the operation cost of sewage treatment is reduced.

Description

A sewage recycling system

technical field

The utility model relates to the field of waste water treatment, in particular to a sewage regeneration system.

Background technique

At present, more than 400 cities in China are short of water. In normal years, the water shortage is 6 billion m ³ , and the daily water shortage reaches 16 million m ³ . It is estimated that the water shortage in 2030 will reach 40 billion to 50 billion m ³ . At present, the annual discharge of urban sewage in China is about 41.4 billion m ³ , but the urban sewage treatment rate and secondary treatment rate are only 30% and 15%, respectively, and the proportion of sewage reuse rate is even lower. The recycling of sewage can make a large amount of sewage treated and reused, reduce the discharge to the environment, and the pollutant content and concentration of the treated sewage have been greatly reduced, and the pollution ability has been greatly reduced, so as to achieve the purpose of improving the water environment. The economic, social and ecological benefits of sewage recycling are mainly reflected in: reducing water supply treatment and water supply costs; reducing urban sewage discharge and corresponding drainage project investment and operating costs; improving ecology Promote the development of industry, tourism, aquaculture, agriculture, forestry and animal husbandry with the social and economic environment; improve the living environment, promote and protect human health, reduce diseases, especially carcinogenic, teratogenic, and genetic mutation hazards; increase water supply, Promote economic development and avoid losses caused by water shortages. Many countries in the world regard the reuse of water and the recycling of sewage as the second water source.

Utility model content

The purpose of the utility model is to provide a sewage regeneration system, which has the advantages of simple structure, low cost, energy saving and environmental protection, and the effluent can reach the water quality standard for reclaimed water reuse.

The technical scheme provided by the utility model is as follows:

A sewage regeneration system, including a water collection tank, a regulating tank, a hydrolytic acidification tank, an anaerobic tank, an anoxic tank, an aerobic tank, a membrane bioreactor, nanofiltration equipment and a disinfection tank; the water outlet of the water tank passes through a water pump and a pipeline Connect to the water inlet of the regulating tank, the water outlet of the regulating tank is connected to the water inlet of the hydrolytic acidification tank through the water pump and the pipeline, the water outlet of the hydrolytic acidification tank is connected to the water inlet of the anaerobic tank through the water pump and the pipeline, and the outlet of the anaerobic tank The water inlet is connected to the water inlet of the anoxic tank through the pipeline, the water outlet of the anoxic tank is connected to the water inlet of the aerobic tank through the pipeline, and the water outlet of the aerobic tank is connected to the water inlet of the membrane bioreactor through the pipeline, and the membrane bioreactor The water outlet of the filter is connected to the water inlet of the nanofiltration equipment through the pipeline, and the water outlet of the nanofiltration equipment is connected to the water inlet of the disinfection pool through the pipeline.

Preferably, a grill is arranged in front of the water inlet of the sump.

Preferably, it also includes a sludge thickening tank and a sludge dewatering device, the sludge outlet of the hydrolytic acidification tank and the aerobic tank is connected to the water inlet of the sludge thickening tank through a pipeline, and the water outlet of the sludge thickening tank is connected through a pipeline To the regulating tank, the sludge outlet of the sludge thickening tank is connected to the sludge dewatering device through a pipeline.

Preferably, the aerobic pool is also provided with a sewage backflow outlet, and the sewage backflow outlet is connected to the water inlet of the anoxic pool through a pipeline.

Preferably, the aerobic tank is also provided with a sludge return outlet, and the sludge return outlet is connected to the water inlet of the anaerobic tank through a pipeline.

Preferably, the water pumps are variable frequency water pumps.

Preferably, an ultraviolet sterilizing device is also included, and the ultraviolet sterilizing device is arranged between the nanofiltration equipment and the disinfection pool.

The landfill leachate treatment system provided by the utility model has the following beneficial effects:

1. The system adopts hydrolytic acidification process, which is an anaerobic treatment method, which effectively reduces the energy consumption of the system.

2. The system adopts anaerobic pool, anoxic pool and aerobic pool for continuous and reflux treatment of sewage, which can simultaneously remove organic pollutants, nitrogen, phosphorus and other elements.

3. The water treatment process of the system is simple, easy to operate, greatly reducing the amount of sludge, and reducing the operating cost of sewage treatment. The quality of the effluent is stable, and various indicators have reached the urban reuse water standard.

Description of drawings

Fig. 1 is a structural schematic diagram of a sewage regeneration system provided by the utility model.

detailed description

In order to enable those skilled in the art to better understand the solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to Figure 1, a sewage regeneration system provided by the utility model, including a sump, a regulating tank, a hydrolytic acidification tank, an anaerobic tank, an anoxic tank, an aerobic tank, a membrane bioreactor, nanofiltration equipment and a disinfection tank . The sewage discharged from the city is collected and pumped into the grid sump, and a fine grid is installed at the water inlet of the sump to remove large particles of impurities, so as to prevent blockage of equipment and affect the sewage treatment effect. The sewage is then pumped into the adjustment tank by the frequency conversion pump, and the homogeneous quantity is obtained in the adjustment tank. A perforated aeration tube is used to stir in the pool to prevent sludge from settling. The regulating tank is equipped with a first-stage lifting pump to lift the sewage to the hydrolysis acidification tank for treatment. The hydrolysis acidification tank uses hydrolysis bacteria and acidification bacteria to hydrolyze the protein, sugar and fat organic pollutants in the domestic sewage under an anaerobic environment. React with acid production to hydrolyze insoluble substances into soluble substances, and then open rings and break chains of macromolecular substances into small molecular substances, mainly into butyric acid, propionic acid and acetic acid, improve the biodegradability of sewage, and make organic Pollutants are more likely to be degraded by subsequent biochemical microorganisms, so that they can be discharged stably. At the same time, the sludge in the pool forms a net to catch the influent, absorbs and oxidizes, and effectively intercepts and clarifies the suspended solids and colloidal substances. This process has a good energy-saving effect because no external power is consumed. The sludge in the hydrolytic acidification tank is finally sent to the sludge thickening tank through the sludge discharge outlet for subsequent treatment.

The effluent from the hydrolytic acidification pool is treated sequentially through the anaerobic pool, the anoxic pool and the aerobic pool (ie, the A2/O pool). The A2/O pool system can fully remove organic matter and denitrify and dephosphorize the sewage. The aerobic tank is also equipped with a sewage return outlet and a sludge return outlet. Part of the sewage mixture treated in the aerobic tank is sent back to the anoxic tank through the return pipe from the sewage return outlet to continue the biochemical reaction treatment. Part of the sludge is sent to the sludge thickening tank for treatment, and the other part of the sludge with a large water content is sent back to the anaerobic tank through the sludge return outlet to continue the cycle treatment.

After the sludge collected in the sludge thickening tank is separated by sedimentation, the supernatant is sent back to the regulating tank for circulating sewage treatment process, and the settled sludge is sent to the sludge dewatering device for dehydration. The sludge after concentration and dehydration treatment The moisture content of the cake can reach below 60%-70%, and then sent to the outside or landfill.

After most of the organic matter is removed by the A2/O pool system, the sewage enters the MBR pool. The main control indicators of the MBR pool include: influent C:N:P=(350-500):5:1, temperature control at 30-35°C, The pH value is controlled at 7-7.2. The effluent from the MBR pool enters the nanofiltration equipment for filtration, and the concentrated liquid produced during this period can be refilled or sprayed back. After being treated by nanofiltration equipment and reaching the reuse standard, the water enters the disinfection tank for disinfection, and then is discharged or recycled. The system can also be equipped with an ultraviolet sterilizing device (not shown in the figure) outside the outlet of the nanofiltration equipment, and the water source after nanofiltration is subjected to ultraviolet sterilizing treatment and then sent to a disinfection pool for disinfection to improve the sterilization effect.

The actual test shows that the effluent quality of this system is stable, and all indicators have reached the urban reuse water standard.

The sewage recovery system provided by the utility model has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present utility model, and the descriptions of the above embodiments are only used to help understand the core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (7)

1. a sewage regeneration system, is characterized in that, comprises sump, regulating pond, hydrolytic acidification pond, anaerobic pond, anoxic pond, aerobic pond, membrane bioreactor, nanofiltration equipment and disinfection pond; The water outlet is connected to the water inlet of the regulating tank through a pump and pipeline, the water outlet of the regulating tank is connected to the water inlet of the hydrolytic acidification tank through a water pump and pipeline, and the water outlet of the hydrolytic acidification tank is connected to the water inlet of the anaerobic tank through a water pump and pipeline , the water outlet of the anaerobic tank is connected to the water inlet of the anoxic tank through the pipeline, the water outlet of the anoxic tank is connected to the water inlet of the aerobic tank through the pipeline, and the water outlet of the aerobic tank is connected to the membrane bioreactor through the pipeline The water inlet and the water outlet of the membrane bioreactor are connected to the water inlet of the nanofiltration equipment through pipelines, and the water outlet of the nanofiltration equipment is connected to the water inlet of the disinfection pool through pipelines. 2. The sewage regeneration system according to claim 1, characterized in that, a grill is arranged in front of the water inlet of the sump. 3. The sewage regeneration system according to claim 1, further comprising a sludge thickening tank and a sludge dewatering device, the sludge discharge outlet of the hydrolytic acidification tank and the aerobic tank is connected to the sludge by pipelines The water inlet of the thickening tank and the water outlet of the sludge thickening tank are connected to the regulating tank through pipelines, and the sludge outlet of the sludge thickening tank is connected to the sludge dewatering device through pipelines. 4. The sewage regeneration system according to claim 1, wherein the aerobic pool is further provided with a sewage backflow outlet, and the sewage backflow outlet is connected to the water inlet of the anoxic pool through a pipeline. 5. The sewage regeneration system according to claim 1, wherein the aerobic tank is further provided with a sludge return outlet, and the sludge return outlet is connected to the water inlet of the anaerobic tank through a pipeline. 6. The sewage regeneration system according to claim 1, further comprising an ultraviolet sterilizing device, and the ultraviolet sterilizing device is arranged between the nanofiltration equipment and the disinfection pool. 7. The sewage regeneration system according to claim 1, wherein the water pumps are frequency conversion water pumps.