CN217895380U - An integrated sewage purification system that purifies sewage into Class III surface water - Google Patents

Abstract

The utility model discloses an integrated sewage purification system for purifying sewage into Class III water on the surface, comprising a container, which is equipped with a photoelectric complementary power generation device, a sewage purification and resource utilization device, and the photoelectric complementary power generation device includes A number of solar panels, combiner boxes, inverters, and two-way electric meters dedicated to photovoltaic power generation; the sewage purification and resource utilization device is connected to the power grid through the inverter through a two-way electric meter, and the sewage purification and resource utilization device includes coagulation and sedimentation device, ion-catalyzed electrolytic denitrification device, reduction tank, biological aerated filter. COD _Cr ≤ 20mg/L, BOD ₅ ≤ 4mg/L, ammonia nitrogen ≤ 1mg/L, total nitrogen ≤ 1mg/L, total phosphorus ≤ 0.2mg/L, chroma ≤ 5, pH 6-9 Among them, the indicators of other pollutants meet the water quality indicators of Class III in Table 1 of the "Environmental Quality Standards for Surface Water" (GB3838‑2002).

Description

An integrated sewage purification system that purifies sewage into Class III surface water

technical field

The utility model relates to the field of sewage purification, in particular to an integrated sewage purification system for purifying sewage into Class III surface water and an operation method thereof.

Background technique

Sewage is a polluted water body produced in the process of people's life and production. The main pollutants of urban sewage in China are low in the south and high in the north. Usually, the physical and chemical indicators are COD≤750mg/L (mostly 200-600mg/L, among which, most of the COD _Cr in the southern region is ≤400mg/L, and the COD _Cr in the northern region is 400～750mg/L), BOD ₅ ≤400mg/L (mostly between 100～350mg/L, BOD ₅ ≤200mg/L in the southern region, ₁₅₀ ～350mg/L in the northern region), SS≤400mg /L, ammonia nitrogen≤35mg/L, total nitrogen≤50mg/L, total phosphorus≤8mg/L, pH7～9. At present, the sewage treatment methods at home and abroad mainly adopt biochemical methods. Since the activated sludge treatment process of Clark utility model sewage for more than 100 years, the sewage treatment process has almost no major changes, mainly activated sludge method and biofilm method and its secondary The improvement of this method includes primary processing, secondary processing and advanced processing. Primary treatment mainly includes sewage collection, coarse grid filtration, fine grid filtration to grit chamber and primary sedimentation tank; the main processes of secondary treatment are: activated sludge method, biofilm method and membrane bioreactor (MBR) Three types of craft. There are three main series of activated sludge treatment processes used in domestic sewage treatment plants: (1) Oxidation ditch series; (2) A/A/O series; (3) Sequencing batch reactor (SBR) series. The biofilm methods used in sewage treatment plants are mainly biological aerated filter process (BAF) and moving bed biofilm (MBBR) process. Membrane bioreactor (MBR) is a new sewage treatment process developed at the end of the 20th century. The advanced treatment processes used at home and abroad are mainly chemical phosphorus removal and denitrification denitrification processes. However, the existing sewage biochemical treatment process has a high concentration of total nitrogen and total phosphorus in the effluent, and the water quality cannot meet the "Environmental Quality Standard for Surface Water" (GB3838-2002). At 15°C, the nitrification effect is poor, the effluent quality is not up to standard, the floor area is large, the construction period is long, and the operating cost is high.

Therefore, improving the effluent quality of sewage treatment plants, reducing the nitrogen and phosphorus discharge of urban sewage treatment plants, and solving the construction land of sewage treatment plants are the primary goals of urban sewage treatment at present. The biochemical method represented by activated sludge method and biofilm method is a classic sewage treatment process. It has been used for more than 100 years, but no major changes have been seen so far. The quality of effluent water cannot meet the requirements of social and economic development, resource utilization and " Surface Water Environmental Quality Standards (GB3838-2002), therefore, there is an urgent need for a high-quality effluent (which can meet the requirements of water resources utilization), short sewage residence time, small land area, few structures, fast construction speed, and low operating costs. A new sewage treatment technology with low cost and greatly shortened construction time. In addition, due to the state's tight grasp on the construction of sewage treatment facilities and the elimination of black and odorous water bodies, there are a large number of small and micro polluted water bodies and emergency sewage treatment projects all over the country that are in urgent need of mobile transportation, good sewage treatment efficiency, high effluent water quality, construction and installation An integrated small sewage treatment device with fast speed and short commissioning time.

Contents of the invention

The purpose of this utility model is to overcome the defects of the existing sewage treatment technology and facilities, and provide an integrated sewage purification system method for purifying sewage into Class III surface water, which is suitable for the treatment of small and micro-polluted water bodies and sewage To deal with the needs of emergency engineering construction, the effluent water quality is high, energy saving and environmental protection, the construction of sewage purification and resource utilization devices with short installation time and the method of sewage purification and resource utilization, it is mainly through the use of solar power generation, photoelectric complementary power supply, coagulation sedimentation, The combination of ion-catalyzed electrolytic denitrification and aerated biological treatment, learn from each other, thus forming a photoelectric complementary integrated sewage purification resource recycling system and sewage purification resource recycling system for the treatment of small and micro polluted sewage bodies or sewage emergency treatment projects Use method.

The application is achieved through the following technical solutions:

An integrated sewage purification system for purifying sewage into Class III water on the surface, including a container, which is equipped with a photoelectric complementary power generation device, a sewage purification and resource utilization device, and the photoelectric complementary power generation device includes several solar panels, confluence box, inverter, photovoltaic power generation special two-way electric meter; the sewage purification and resource utilization device is connected to a power grid connected by a two-way electric meter through the inverter, and the sewage purification and resource utilization device includes a coagulation sedimentation device, an ion Catalytic electrolytic denitrification device, reduction tank, biological aerated filter.

As a preferred embodiment, the coagulation and sedimentation device includes a pH adjustment tank, a coagulation tank, a coagulation aid tank, a sedimentation tank and an intermediate water tank, the water inlet of the pH adjustment tank is connected with the outlet of the sewage adjustment tank, and the pH adjustment tank The water outlet of the coagulation tank is connected with the water inlet of the coagulation tank, the water outlet of the coagulation tank is connected with the water inlet of the coagulation aid tank, the water outlet of the coagulation aid tank is connected with the water inlet of the sedimentation tank, and the water outlet of the sedimentation tank It is connected to the water inlet of the intermediate pool, the sludge outlet of the sedimentation tank is connected to the inlet of the sludge thickening tank, and the water outlet of the intermediate pool is connected to the ion catalytic electrolytic denitrification device;

The ion-catalyzed electrolytic denitrification device includes an electrolyzer, a DC power supply, a degassing tank, an ion catalyst dosing device, and an electrode cleaning device. The water inlet of the electrolyzer is connected to the water outlet of the intermediate pool of the coagulation sedimentation device. The water outlet of the electrolyzer is connected with the water inlet of the degassing tank; the pipeline mixer for mixing the ion catalyst is also installed in the pipeline connected between the intermediate pool and the electrolyzer; the water outlet pipe of the ion catalyst dosing device is connected with the The water inlet pipe connection of the electrolysis machine is installed before the pipe mixer of the water inlet pipe of the electrolysis machine; the water outlet of the degassing tank is set at 500-1000mm from the top of the degassing tank; the water outlet of the degassing tank is connected with the aeration The water inlet pipe of the biofilter is connected, and a sewage circulation port is also provided at a place 500-1000 mm away from the water outlet of the degassing tank, and is connected with the water inlet pipe of the electrolysis machine through a circulating water pump and a water pipe; the biological aerated filter The water outlet is connected to the clear water discharge port; the electrode cleaning device is composed of a pickling solution storage tank and a pickling solution delivery pump, and the pickling solution uses 2% to 3% hydrochloric acid solution or 4% to 6% citric acid solution ;

The reduction tank includes a water inlet pipe, a pipeline mixer installed on the water inlet pipe, a water distributor, a reducing agent solution storage tank and a reducing agent solution metering delivery pump. The reduction tank is set in the degassing tank, and the reduction tank The water inlet pipe is connected to the water outlet of the degassing tank, and the water inlet pipe of the reduction tank is connected from top to bottom with the water distributor arranged at the bottom of the reduction tank. The water inlet pipe of the reducing agent solution storage tank is installed before the pipeline mixer, and a water pipe connected to the intermediate pool is also installed on the water inlet pipe of the reduction tank;

The biological aerated filter includes a main body of the aerated filter and a backwash system, and the main body of the aerated filter includes a tank body, a filter plate installed in the tank body, an aeration air duct, a backwash air duct, and a filter material; The main body of the aeration filter is also equipped with an aeration fan and an air duct; the backwash system includes a clean water storage tank, a clean water pump, and a backwash water storage tank; the clean water storage tank of the backwash system and the bottom of the filter The cleaning water inlet is connected, the backwash water outlet on the top of the filter is connected to the inlet of the backwash water storage tank, the water outlet of the backwash water storage tank is connected to the water inlet of the coagulation sedimentation device, and the backwash water storage tank The sludge outlet at the bottom of the tank is connected to the sludge tank.

As a preferred embodiment, the solar panel is a monocrystalline silicon panel or a polycrystalline silicon panel. When the electricity generated by the photovoltaic power is more than the electricity used by the sewage purification resource utilization device integrated in the container, the photovoltaic power generation will pass through the inverter and the two-way electric meter To supply power to the grid. On the contrary, when the electricity generated by photovoltaic power generation is less than the electricity used by the sewage purification resource utilization device integrated in the container, the grid will supply power to the electrical appliances through the ammeter and inverter.

As a preferred embodiment, the pH adjustment tank, the coagulation tank, and the coagulation aid tank are respectively provided with pH regulator, coagulant, and coagulant aid dosing devices; The adding device is respectively composed of a pH regulator storage tank, a coagulant storage tank, a coagulant aid storage tank and a dosing pump, and the pH regulator can be directly quantitatively added to a water delivery pipeline equipped with a pipeline mixer.

As a preferred embodiment, the coagulation and sedimentation device is formed by using carbon steel plates in the container and directly divided and welded according to the design. The water inlet of the degassing tank of the catalytic electrolytic denitrification device and the water distribution tank at the bottom The water outlet on the upper part of the degassing tank is connected to the water inlet pipe of the biological aerated filter, the outlet pipe of the biological aerated filter is connected to the clear water drain, and the upper part of the air bubble scum collection tank is also equipped with a spray device, the electrolytic purification device also includes a chlorine ion catalyst solution dosing device for adding sodium chloride or sodium hypochlorite as chloride ions for ion catalysis.

As a preferred embodiment, the ion-catalyzed electrolytic denitrification device further includes a host pickling system, and the host pickling system includes a pickling solution preparation tank and a pickling solution delivery pump.

As a preferred embodiment, the integrated sewage purification system for purifying sewage into Class III surface water does not have the carbon source dosing system of the traditional biological aerated filter.

As a preferred embodiment, the water inlet of the sewage purification and resource utilization device is equipped with one or more online monitors for COD _Cr , ammonia nitrogen, total nitrogen and total phosphorus, and the sewage purification and resource utilization device One or more of online monitors for residual chlorine, COD _Cr , ammonia nitrogen, total nitrogen and total phosphorus are also installed at the water outlet.

An operation method of an integrated sewage purification system for purifying sewage into Class III surface water, comprising the following steps:

(1) Coagulation and sedimentation: Quantitatively pump the sewage from the sewage adjustment tank to the pH adjustment tank, turn on the mixer, add sodium hydroxide at 20-50g/ ^m3 , stir and mix for 1-2 minutes, and adjust the pH of the sewage to 8-9, then use the liquid level difference to flow the sewage into the coagulation tank, add coagulant at 80-150g/ ^m3 , stir and mix for 2-5 minutes, and then use the liquid level difference to flow the sewage from the coagulation tank into the coagulation aid In the pool, add PAM at 1-1.5g/ ^m3 as a coagulant aid, stir and mix for 1-2 minutes, then flow into the sedimentation tank for 15-60 minutes, so that the supernatant of the sedimentation tank flows into the middle pool, and the sedimentation tank The bottom sludge is pumped into the sludge tank, and coagulation and sedimentation are used to remove SS, COD _Cr , BOD ₅ , total phosphorus, petroleum, animal and vegetable oils and heavy metal ions in the sewage. After coagulation and sedimentation treatment, SS is removed by 95% Above, more than 70-90% of COD _Cr and BOD ₅ are removed, more than 95% of total phosphorus is removed, and more than 95% of heavy metal ions are removed;

(2) Ion-catalyzed electrolytic denitrification: add 10-12% sodium hypochlorite at 300-800ml/ ^m3 or add sodium chloride at 80-150g/ ^m3 to the effluent after step (1) coagulation and storage in the intermediate pool As a chloride ion catalyst, after mixing, it is pumped into an ion catalytic electrolysis machine for electrolytic denitrification. The working voltage of the electrolysis machine is 5-100V, and the current is 10-2000A. The effluent after electrolysis enters the degassing tank for gas-liquid separation. The air bubbles are scraped into the air bubble collection tank through the slag scraper, and the clear liquid is pumped into the electrolysis machine again through the circulation pump for further electrolysis until the ammonia nitrogen, total nitrogen, COD _Cr , and BOD ₅ are qualified, and then discharged into the biological aerated filter. The filter is aerated to remove the residual sodium hypochlorite and discharged into the drain; electrolytic denitrification is used to remove the residual ammonia nitrogen and total nitrogen in the sewage after coagulation and sedimentation treatment, and at the same time assist in the removal of COD _Cr , BOD ₅ , total phosphorus, SS in the sewage ;The effluent after electrolytic denitrification meets the following indicators: COD≤40mg/L, BOD≤10mg/L, ammonia nitrogen≤2mg/L, total nitrogen≤3mg/L, total phosphorus≤0.4mg/L, SS≤10mg/L , chromaticity less than 5, fecal coliform number less than 3/L;

(3) Reduction: The sewage after catalytic electrolytic denitrification in step (2) flows into the reduction pool, and quantitatively adds 5 to 20% sodium sulfite solution into the reduction pool or pumps 1/5 to 1/4 of the sodium sulfite solution from the intermediate pool. Coagulate and precipitate the water and neutralize the residual sodium hypochlorite in catalytic electrolytic denitrification to restore the water body;

(4) Biological aerated filter purification: pump the water obtained from the reduction in step (3) into the biological aerated filter, and remove the residual nitric acid in the water after the treatment of steps (1) to (3) through the biological aerated filter Nitrogen, nitrite nitrogen, COD _Cr , BOD ₅ , so that the COD _Cr in the water body will drop from ≤50mg/L to ≤20mg/L, and the BOD ₅ in the water body will drop from ≤20mg/L to ≤4mg/L, Reduce the ammonia nitrogen in the water body from ≤2mg/L to ≤0.5mg/L, and reduce the total nitrogen in the water body from ≤3mg/L to ≤1mg/L; the effluent treated by the biological aerated filter, the main pollutants (COD _Cr , BOD ₅ , total phosphorus, ammonia nitrogen, total nitrogen) indicators are: COD≤20mg/L, BOD _5≤4mg /L, ammonia nitrogen≤1mg/L, total nitrogen≤1mg/L, total phosphorus≤0.2mg/L L, SS≤6mg/L, and other pollutants meet the index requirements corresponding to Class III water in Table 1 of the "Surface Water Environmental Quality Standard"(GB3838-2002);

(5) Sludge treatment: transport the sludge from the coagulation sedimentation and ion-catalyzed electrolytic denitrification device to the sludge thickening tank 500, and regularly use the mobile sludge treatment device for treatment.

As a preferred embodiment, the ion catalyst of the ion-catalyzed electrolytic denitrification device uses chloride ions, and the concentration of chloride ions in the sewage should be 100-150 mg/L. When the concentration of chloride ions in the sewage is lower than 100 mg/L, add chlorine Sodium chloride or sodium hypochlorite replenishes chloride ion, and described coagulant adopts one or more in ferric chloride, polyferric, ferric sulfate, aluminum sulfate, polyaluminum chloride, and described coagulant aid adopts polyacrylamide ( Abbreviated as PAM), when in use, it is first prepared into a 10-15% solution.

Compared with the prior art, the utility model has the following beneficial effects:

1. The equipment can be flexibly moved according to the needs of sewage treatment. It is suitable for sewage treatment with a scale of 20 to 1,000 tons per day. The main pollutant indicators of the effluent meet the Class III water in Table 1 of the "Surface Water Environmental Quality Standard" (GB3838-2002). The index requirements of the existing small and micro water bodies and small sewage treatment station equipment and technology problems are solved;

2. When using this sewage purification resource recycling system to purify sewage, it is less affected by the concentration changes of ammonia nitrogen, total nitrogen, COD _Cr and total phosphorus, and the main pollutants in the effluent can meet the "Environmental Quality Standards for Surface Water" (GB3838- 2002) Table 1 corresponds to the water quality index requirements for category III water;

3. Photoelectric complementary power generation is adopted, and solar energy is the main factor. The equipment operates when the solar energy is sufficient, and does not operate at other times. The sewage is stored in the regulating pool, and it will be operated after solar energy is available. The energy consumption is low, and the unit operating cost is lower than that of existing technologies and equipment. lower than half;

4. When designing the equipment, properly reserve the power load. When the loads such as COD _Cr , BOD ₅ , total nitrogen or sewage flow in the water body change greatly, by adjusting the power consumption, the load impact can be met, the water quality can be guaranteed, and the water quality can be resisted. Strong load impact;

5. At present, the biological method is the mainstream process of sewage treatment. However, the debugging speed of the biological method is slow, and a debugging cycle can range from a few weeks to a few months. In addition, the biological method not only needs to control the dosing amount, but also the air volume, temperature, etc., and has many disadvantages. By adopting the photoelectric complementary sewage purification resource utilization system of the utility model, as long as the power consumption is controlled, the water quality of the effluent can be controlled, and the debugging time is only a few hours, and the debugging can be carried out on the same day, and the standard can be reached on the same day. Therefore, the switch is flexible, if there is water that needs to be treated, it will be turned on, and if there is no water, it will be turned off. At the same time, according to the amount of pollutants to be removed, the current can be adjusted at any time, and the opening and closing are flexible. If there are more pollutants to be removed, the opening will be large, and if there are few pollutants to be removed, the opening will be small. Fast speed, simple operation and easy automatic control;

6. The 100 tons/day integrated sewage treatment equipment covers an area of about 30-50 square meters, which is only one-fifth of the traditional process;

7. This method only has four processes of "coagulation + catalytic electrolytic denitrification + reduction + biological aerated filter purification", the production process is short, and the operation control only needs to control pH, coagulant dosage and current, and control Few factors, easy to operate;

8. Different from the biochemical method, the biochemical method treats sewage. Due to the anaerobic and anoxic processes, the commissioning period lasts for several months. However, this mobile integrated catalytic electrolytic sewage treatment equipment only has coagulation, catalytic electrolytic denitrification, and reduction. And the four processes of biological aerated filter filtration, the commissioning time from the start-up to the qualified water outlet is only a few hours, and the start-up on the same day is qualified on the same day. Therefore, the commissioning period is short;

9. The equipment is a stereotyped equipment. It has been produced and debugged in the production workshop. When necessary, it only needs to harden the site and transport it to the site to complete the installation and commissioning within one week. Therefore, the construction speed is fast;

10. When using this equipment to upgrade the existing sewage treatment station, the existing land can be used, and no new land is required;

11. During the process of sewage treatment by the equipment, oxygen is generated, which greatly increases the dissolved oxygen in the regenerated water after treatment, and the dissolved oxygen content is above 5mg/L.

Description of drawings

Fig. 1 is a schematic diagram of the technological process of an integrated sewage purification system for purifying sewage into surface Class III water according to the present invention.

Fig. 2 is a schematic diagram of the overall structure of an integrated sewage purification system for purifying sewage into surface Class III water according to the present invention.

Fig. 3 is a top view of an integrated sewage purification system for purifying sewage into Class III surface water of the present invention.

Fig. 4 is a structural schematic diagram of a coagulation and sedimentation device in an integrated sewage purification system for purifying sewage into surface Class III water according to the present invention.

Fig. 5 is a structural schematic diagram of an ion-catalyzed electrolytic denitrification device in an integrated sewage purification system for purifying sewage into surface Class III water according to the present invention.

Fig. 6 is a structural schematic diagram of a reduction tank in an integrated sewage purification system for purifying sewage into surface Class III water according to the present invention.

Fig. 7 is a schematic diagram of the working process of the biological aerated filter in an integrated sewage purification system for purifying sewage into surface Class III water according to the present invention.

Fig. 8 is a schematic cross-sectional structure diagram of a biological aerated filter in an integrated sewage purification system for purifying sewage into surface Class III water according to the present invention.

Fig. 9 is a structural schematic diagram of a photoelectric complementary power generation device in an integrated sewage purification system for purifying sewage into surface class III water according to the present invention.

Detailed ways

Below in conjunction with accompanying drawing the embodiment of the present utility model is described in detail: present embodiment is carried out under the premise of technical solution of the present utility model, has provided detailed embodiment and concrete operation process, but protection scope of the present utility model It is not limited to the following examples.

See Fig. 1, Fig. 2, Fig. 3 and Fig. 4, an integrated sewage resource utilization system that purifies sewage into Surface III, which consists of container 1 and the sewage purification resource recycling system integrated in container 1 and photoelectric complementary power generation Device configuration, the sewage treatment system integrated in the container 1 includes a coagulation sedimentation device 100 , an ion catalytic electrolysis denitrification device 200 , a reduction tank 300 and a biological aerated filter 400 .

The coagulation and sedimentation device 100 is composed of a pH adjustment tank 110, a coagulation tank 120, a coagulation aid tank 130, a sedimentation tank 140, and an intermediate pool 150. The water inlet of the pH adjustment tank 110 is connected to the outlet of the sewage adjustment tank, and the pH adjustment tank 110 The water outlet of the coagulation tank 120 is connected with the water inlet of the coagulation tank 120, the water outlet of the coagulation tank 120 is connected with the water inlet of the coagulation aid tank 130, the water outlet of the coagulation aid tank 130 is connected with the water inlet of the sedimentation tank 140, and the water outlet of the sedimentation tank 140 The water outlet 142 is connected to the water inlet of the intermediate pool 150, the sludge outlet 141 of the sedimentation tank 140 is connected to the inlet of the sludge thickening tank 500, and the water outlet of the intermediate pool 150 is connected to the ion catalytic electrolysis depurification device 200. The coagulation and sedimentation device is made of carbon steel plates that are directly divided and welded in the container 1 according to the design.

Referring to Fig. 5, the sub-catalytic electrolytic denitrification device 200 includes an electrolyzer 210, a DC power supply 220, a degassing tank 230, an ion catalyst dosing device 250 and an electrode cleaning device 240, the water inlet of the electrolyzer 210 and the coagulation sedimentation device 100 The water outlet of the intermediate pool 150 is connected, and the water outlet of the electrolyzer 210 is connected with the water inlet 231 of the degassing tank 230; the pipeline mixer 253 for mixing the ion catalyst is also installed in the pipeline connected between the intermediate pool 150 and the electrolyzer; The water outlet of the catalyst dosing device 250 is connected with the water inlet pipe of the electrolyzer 210, and is installed before the pipeline mixer 253 of the water inlet pipe of the electrolyzer; There is also a circulation port 233 and a circulating water pump 235 connected to the water inlet pipe of the electrolysis machine 310 below. The electrode cleaning device 240 is composed of a pickling solution storage tank 241 and a pickling solution delivery pump 242. The pickling solution uses 2% to 3% hydrochloric acid solution or 4% to 5% citric acid solution.

Referring to Fig. 6, the reduction tank 300 includes a water inlet pipe 310, a pipe mixer 320 installed on the water inlet pipe, a water distributor 330, a reductant solution storage tank 340, a reductant solution metering delivery pump 341, a reduction tank 350 and an agitator 360, The reduction tank is set in the degassing tank 230, the water inlet pipe 310 is connected with the water outlet 232 of the degassing tank 230, the water inlet pipe 310 is connected with the water distributor 330 arranged at the bottom of the reduction tank from top to bottom, and the reducing agent solution storage tank 340 communicates with the water inlet pipe 310 through the reducing agent solution metering pump 350. The reducing agent solution storage tank 340 is installed before the pipeline mixer 320, and a water pipe connected to the intermediate pool is also installed on the water inlet pipe 310. The mixer is installed at the front of the reducing pool. above.

Referring to Fig. 7 and Fig. 8, the BAF is composed of a BAF body 410, an aeration system 420 and a backwash system 430; the backwash system 420 is composed of a backwash tank 421, a backwash pump 422, a backwash Wash water supply pipe 423, backwash aeration fan 424, backwash aeration pipe 425 and backwash waste water tank 426; aeration system 430 consists of aeration fan 431, aeration main air pipe 432; biological aeration filter The main body is composed of pool body 411, water inlet pipe 412, long-handle filter head 413, support frame 414, filter material support layer 415 and filter material 416, aeration fan 431, aeration air pipe 432, and water outlet tank 417. The water inlet of the tank is connected with the water outlet of the reduction tank, the water outlet of the biological aerated filter is connected with the water inlet of the disinfection tank, and the water inlet pipe of the biological aerated filter is installed in the pipe ditch at the bottom of the filter; the biological aerated filter The aeration main air pipe is installed on one side of the bottom of the filter tank, and the aeration branch air pipe is installed under the filter brick or filter plate at the bottom of the filter tank.

Referring to Fig. 9, the photoelectric complementary power generation device 600 is composed of several solar panels 610, a combiner box 420, an inverter 630, an integrated sewage purification resource utilization system 640, and a bidirectional electric meter 650 dedicated to photovoltaic power generation; the solar panel 610 is a monocrystalline silicon panel or a polysilicon plate; the inverter 630 is respectively connected to the integrated sewage purification device 640 and to the power grid 660 through the bidirectional electric meter 650 .

When the power of the photoelectric complementary power generation device 600 is more than the power used by the integrated sewage purification and resource utilization system 640, the photoelectric complementary power generation device 600 supplies power to the grid 660 through the inverter 630 and the bidirectional electric meter 640; otherwise, when the photoelectric complementary power generation device When the power of 600 is less than the power used by the integrated sewage purification and resource utilization system 640 , the power grid 660 supplies power to the integrated sewage purification and resource utilization system 640 through the bidirectional electric meter 650 and the inverter 630 .

The water inlet 231 of the degassing tank 230 of the ion-catalyzed electrolytic denitrification device 200 is connected with the water distributor 232 located at the bottom of the degassing tank, the water outlet of the upper part of the degassing tank 230 is connected with the water inlet of the biological aerated filter, and the degassing tank The top of the 230 is also equipped with a slag scraper and a bubble collection tank. The ion-catalyzed electrolytic denitrification device 200 also includes a chloride ion catalyst dosing system 250 , which is composed of a chloride ion catalyst solution preparation tank 251 , a solution delivery pump 252 and a pipeline mixer 253 .

One or more online monitors for COD _Cr , ammonia nitrogen, total nitrogen, and total phosphorus are installed at the water inlet of the integrated sewage purification and resource utilization system, and online monitors for residual chlorine, COD _Cr , ammonia nitrogen, and total nitrogen are also installed in the effluent. and one or more online monitors for total phosphorus.

An operation method of an integrated sewage purification system for purifying sewage into Class III surface water, comprising the following steps:

(1) Coagulation and sedimentation: Quantitatively pump the sewage from the sewage adjustment tank to the pH adjustment tank, turn on the mixer, add sodium hydroxide at 20-50g/ ^m3 , stir and mix for 1-2 minutes, and adjust the pH of the sewage to 8-9, then use the liquid level difference to flow the sewage into the coagulation tank, add coagulant at 80-150g/ ^m3 , stir and mix for 2-5 minutes, and then use the liquid level difference to flow the sewage from the coagulation tank into the coagulation aid In the pool, add PAM at 1-1.5g/ ^m3 as a coagulant aid, stir and mix for 1-2 minutes, then flow into the sedimentation tank for 15-60 minutes, so that the supernatant of the sedimentation tank flows into the middle pool, and the sedimentation tank The bottom sludge is pumped into the sludge tank, and coagulation and sedimentation are used to remove SS, COD _Cr , BOD ₅ , total phosphorus, petroleum, animal and vegetable oils and heavy metal ions in the sewage. After coagulation and sedimentation treatment, SS is removed by 95% Above, more than 70-90% of COD _Cr and BOD ₅ are removed, more than 95% of total phosphorus is removed, and more than 95% of heavy metal ions are removed;

(2) Ion-catalyzed electrolytic denitrification: add 10-12% sodium hypochlorite at 300-800ml/ ^m3 or add sodium chloride at 80-150g/ ^m3 to the effluent after step (1) coagulation and storage in the intermediate pool As a chloride ion catalyst, after mixing, it is pumped into an ion catalytic electrolysis machine for electrolytic denitrification. The working voltage of the electrolysis machine is 5-100V, and the current is 10-2000A. The effluent after electrolysis enters the degassing tank for gas-liquid separation. The air bubbles are scraped into the air bubble collection tank through the slag scraper, and the clear liquid is pumped into the electrolysis machine again through the circulation pump for further electrolysis until the ammonia nitrogen, total nitrogen, COD _Cr , and BOD ₅ are qualified, and then discharged into the biological aerated filter. The filter is aerated to remove the residual sodium hypochlorite and discharged into the drain; electrolytic denitrification is used to remove the residual ammonia nitrogen and total nitrogen in the sewage after coagulation and sedimentation treatment, and at the same time assist in the removal of COD _Cr , BOD ₅ , total phosphorus, SS in the sewage ;The effluent after electrolytic denitrification meets the following indicators: COD≤40mg/L, BOD≤10mg/L, ammonia nitrogen≤2mg/L, total nitrogen≤3mg/L, total phosphorus≤0.4mg/L, SS≤10mg/L , chromaticity less than 5, fecal coliform number less than 3/L;

(3) Reduction: The sewage after catalytic electrolytic denitrification in step (2) flows into the reduction pool, and quantitatively adds 5 to 20% sodium sulfite solution into the reduction pool or pumps 1/5 to 1/4 of the sodium sulfite solution from the intermediate pool. Coagulate and precipitate the water and neutralize the residual sodium hypochlorite in catalytic electrolytic denitrification to restore the water body;

(4) Biological aerated filter purification: pump the water obtained from the reduction in step (3) into the biological aerated filter, and remove the residual nitric acid in the water after the treatment of steps (1) to (3) through the biological aerated filter Nitrogen, nitrite nitrogen, COD _Cr , BOD ₅ , so that the COD _Cr in the water body will drop from ≤50mg/L to ≤20mg/L, and the BOD ₅ in the water body will drop from ≤20mg/L to ≤4mg/L, Reduce the ammonia nitrogen in the water body from ≤2mg/L to ≤0.5mg/L, and the total nitrogen in the water body from ≤3mg/L to ≤1mg/L; the effluent treated by the biological aerated filter, the main pollutants The indicators are: COD≤20mg/L, BOD _5≤4mg /L, ammonia nitrogen≤1mg/L, total nitrogen≤1mg/L, total phosphorus≤0.2mg/L, SS≤6mg/L, and other pollutant indicators comply with the "Surface Water Environmental Quality Standards" (GB3838-2002) Table 1 corresponds to the index requirements for Class III water.

(5) Sludge treatment: transport the sludge from the coagulation sedimentation and ion-catalyzed electrolytic denitrification device to the sludge thickening tank 500, and regularly use the mobile sludge treatment device for treatment.

The coagulant is ferric trichloride, polyferric, ferric sulfate, aluminum sulfate, polyaluminum chloride or a mixture thereof; the coagulant is polyacrylamide (PAM for short).

Further, coagulants such as ferric trichloride, polyferric, ferric sulfate, aluminum sulfate, polyaluminum chloride or a mixture of the two, should be prepared into a 10-15% solution when used.

The effluent indicators after the sewage treatment method is: COD _Cr ≤20mg/L, BOD ₅ ≤4mg/L, ammonia nitrogen ≤1mg/L, total nitrogen ≤1mg/L, total phosphorus ≤0.2mg/L, SS≤ 5mg/L, chromaticity less than 5, fecal coliforms less than 3/L, and other pollutant indicators meet the corresponding index requirements for Class III water in Table 1 of the "Surface Water Environmental Quality Standards" (GB3838-2002).

Example 1:

50 tons/day integrated sewage purification resource recycling system that purifies sewage into Surface III

Referring to Fig. 1, Fig. 2 and Fig. 3, a certain 50 tons/day integrated sewage purification and recycling system consists of a container 1 and a sewage purification and recycling device; the geometric size of the container 1 is 6000×3200×3200 ( mm); the container 1 is equipped with a sewage purification and resource recycling device; the sewage purification and resource recycling device is composed of a coagulation sedimentation device 100, an ion catalytic electrolysis denitrification device 200, a reduction tank 300 and a biological aerated filter 400.

Referring to Fig. 4, coagulation sedimentation device 100 is made of pH adjustment tank 110, coagulation tank 120, coagulation aid tank 130, sedimentation tank 140 and intermediate pool 150; , the water inlet of the pH adjustment tank 110 is connected to the water outlet of the sewage adjustment tank, and the water outlet of the pH adjustment tank 110 is connected to the water inlet of the coagulation tank 120; the geometric size of the coagulation tank 120 is a square bucket or a drum of 200 liters , the water outlet of coagulation aid tank 120 is connected with the water inlet of coagulation aid tank 130; The geometric size of the pool 140 is a 2,500-3,000-liter square barrel or drum. The water outlet of the sedimentation tank 140 is connected to the water inlet of the intermediate pool 150, and a mud discharge port is also installed at the bottom of the sedimentation tank 140; the geometric dimensions of the intermediate pool 150 It is a 1000-liter square barrel or drum, and the water outlet of the middle pool 150 is connected to the ion catalytic electrolysis depurification device 200; more preferably, the coagulation and sedimentation device is made of carbon steel plates that are directly segmented and welded in the container 1 according to the design.

Referring to Fig. 5, the ion-catalyzed electrolytic denitrification device 200 includes an electrolyzer 210, a DC power supply 220, a degassing tank 230, an ion catalyst dosing device 250 and an electrode cleaning device 240; ), the electrode group is installed in the pipe; the water inlet of the electrolysis machine 210 is connected with the water outlet of the intermediate pool 150 of the coagulation sedimentation device 100, and the water outlet of the electrolysis machine 210 is connected with the water inlet of the degassing tank 230; degassing The geometric size of tank 230 is a drum of 1200×2300 (mm), and the water outlet is 400 (mm) from the top of the drum, which is connected to the biological aerated filter through a Φ100 pipe, and the outlet pipe of degassing tank 230 is also provided with The circulating water pump 235 is connected to the water inlet pipe of the electrolysis machine 310, and the electrode cleaning device 240 is composed of a pickling solution storage tank 241 and a pickling solution delivery pump 242, and the pickling solution is 2% to 3% hydrochloric acid solution or 4% to 5% citric acid solution.

Referring to Fig. 6, the reduction tank 300 includes a water inlet pipe 310, a pipeline mixer 320 installed on the water inlet pipe, a water distributor 330, a reductant solution storage tank 340, a reductant solution metering pump 350 and a reduction tank 360, and the reduction tank cover In the degassing tank 230, the water inlet pipe 310 is connected with the water outlet 232 of the degassing tank 230, the water inlet pipe 310 is connected with the water distributor 330 arranged at the bottom of the reduction tank from top to bottom, and the reducing agent solution storage tank 340 is The agent solution metering delivery pump 350 is communicated with the water inlet pipe 310, the reducing agent solution storage tank 340 is installed before the pipeline mixer 320, and a water pipe connected to the intermediate pool is also installed on the water inlet pipe 310;

Referring to Fig. 7 and Fig. 8, the BAF is composed of a BAF body 410, an aeration system 420 and a backwash system 430; the backwash system 420 is composed of a backwash tank 421, a backwash pump 422, a backwash Wash water supply pipe 423, backwash aeration fan 424, backwash aeration pipe 425 and backwash waste water tank 426; aeration system 430 consists of aeration fan 431, aeration main air pipe 432; biological aeration filter The main body is composed of pool body 411, water inlet pipe 412, long-handle filter head 413, support frame 414, filter material support layer 415 and filter material 416, aeration fan 431, aeration air pipe 432, and water outlet tank 417. The water inlet of the tank is connected with the water outlet of the reduction tank, the water outlet of the biological aerated filter is connected with the water inlet of the disinfection tank, and the water inlet pipe of the biological aerated filter is installed in the pipe ditch at the bottom of the filter; the biological aerated filter The aeration main air pipe is installed on one side of the bottom of the filter tank, and the aeration branch air pipe is installed under the filter brick or filter plate at the bottom of the filter tank.

Referring to Fig. 9, the photoelectric complementary power generation device 600 is composed of several solar panels 610, a combiner box 420, an inverter 630, an integrated sewage purification resource utilization system 640, and a bidirectional electric meter 650 dedicated to photovoltaic power generation; the solar panel 610 is a monocrystalline silicon panel or a polysilicon plate; the inverter 630 is respectively connected to the integrated sewage purification device 640 and to the power grid 660 through the bidirectional electric meter 650 .

When the power of the photoelectric complementary power generation device 600 is more than the power used by the integrated sewage purification and resource utilization system 640, the photoelectric complementary power generation device 600 supplies power to the grid 660 through the inverter 630 and the bidirectional electric meter 640; otherwise, when the photoelectric complementary power generation device When the power of 600 is less than the power used by the integrated sewage purification and resource utilization system 640 , the power grid 660 supplies power to the integrated sewage purification and resource utilization system 640 through the bidirectional electric meter 650 and the inverter 630 . The ion catalyst dosing device 250 is composed of a chloride ion catalyst solution storage tank 251 , a delivery pump 252 and a pipeline mixer 253 .

The measured water quality of the sewage is shown in Table 1.

Table 1 The main pollutant components of sewage.

serial number Pollutants unit Actual measured value design value Remark 1 pH dimensionless 7.3 6～9 1 COD_Cr mg/L 280 300 2 BOD₅ mg/L 115 150 3 Total Phosphorus mg/L 6.5 8.0 4 Ammonia nitrogen mg/L 59 65 5 total nitrogen mg/L 67 70 6 SS mg/L 180 200 7 Chroma Dilution factor 80 100 8 Chloride mg/L 75 150

Step 1. Coagulation and sedimentation

Coagulation and sedimentation is to quantitatively pump the sewage from the adjustment tank to the pH adjustment tank 110, turn on the mixer, pump in 10% sodium hydroxide at a rate of 300ml/ ^m3 , stir, adjust the pH to 8.5, and then use the liquid level difference to flow into the coagulation tank In 120, pump 10% PAC solution at 1000ml/m3, stir, and then use the liquid level difference to flow into the coagulation aid tank 130, pump 1.0‰ PAM solution at 300ml/ ^m3 , stir, and then use the liquid level difference to The sewage in the coagulation aiding tank 130 flows into the sedimentation tank 140 for sedimentation, and the supernatant of the sedimentation tank 140 flows into the intermediate water tank 150 by utilizing the liquid level difference.

Coagulation sedimentation is mainly used to remove a large amount of SS, COD _Cr , BOD ₅ , total phosphorus and various heavy metal ions in sewage. After coagulation sedimentation treatment, more than 95% of SS is removed, and 80% of COD _Cr and BOD ₅ are removed. 95%, more than 95% of total phosphorus is removed, and more than 95% of various heavy metal ions are removed;

Step 2. Ion-catalyzed electrolytic denitrification

After step (1) coagulation and sedimentation and storage in the effluent in the intermediate pool 150, the concentration is 75mg/L. Because the concentration of chloride ions in the water body is lower than 100mg/L, start the chloride ion dosing pump, press 600ml/L Add 10-12% sodium hypochlorite or add sodium chloride solution at 100-150 mg/L, start the lift pump, pump the clear water obtained in step (1) coagulation and precipitation into the ion-catalyzed electrolyzer for electrolytic denitrification, the working voltage of the electrolyzer 55V, current 260A, the clean water after electrolysis enters the degassing tank for gas-liquid separation, the upper air bubbles are scraped into the air bubble collection tank through the slag scraper, and the lower clear liquid is pumped into the electrolytic machine again through the circulation pump for further electrolytic purification to ammonia nitrogen , total nitrogen, COD _Cr , and BOD ₅ are qualified and discharged into the biological aerated filter for aeration, and the residual sodium hypochlorite is removed and discharged into natural water bodies. Electrolysis is mainly used to remove major pollutants such as COD _Cr , BOD ₅ , total phosphorus, SS, ammonia nitrogen and total nitrogen remaining in sewage after coagulation and sedimentation treatment. The effluent of sewage after electrolysis purification meets the following indicators: chroma ≤ 2, COD _Cr ≤45mg/L, BOD ₅ ≤10mg/L, SS≤8mg/L, total nitrogen ≤3mg/L, ammonia nitrogen ≤1.5mg/L, total phosphorus ≤0.2mg/L, fecal coliforms ≤3 /L.

Step 3. Restoration

Step (2) The water obtained by ion-catalyzed electrolytic denitrification is injected into the reduction tank 300 through the denitrification outlet, and 10% sodium sulfite solution is metered in to reduce and remove sodium hypochlorite in the water.

Step 4. Biological aerated filter treatment

The water obtained in step (3) is pumped into the biological aerated filter through the lifting pump, and after being treated by the biological aerated filter, the effluent meets the following indicators: chromaticity ≤ 2, COD _Cr ≤ 16mg/L, BOD ₅ ≤ 2mg/L L, SS≤5mg/L, total nitrogen≤0.9mg/L, ammonia nitrogen≤0.3mg/L, total phosphorus≤0.2mg/L, number of fecal coliforms≤3/L, and other pollutant indicators comply with the "Surface Water Environmental Quality Standards" (GB3838-2002) Table 1 corresponding to the index requirements for Class III water.

Table 2 The effluent water quality table after the sewage is treated by the integrated sewage purification and resource utilization equipment

serial number Pollutants unit Influent measured value Actual measured value of effluent Removal rate (%) 1 pH dimensionless 7.3 7.5 - 1 COD_Cr mg/L 280 16.0 94.25 2 BOD₅ mg/L 115 2.0 98.09 3 Total Phosphorus mg/L 6.5 0.17 97.38 4 Ammonia nitrogen mg/L 59 0.3 99.49 5 total nitrogen mg/L 67 0.9 98.66 6 SS mg/L 180 4 97.78 7 Chroma Dilution factor 80 2 97.50 8 Chloride mg/L 75 - - 9 Fecal coliforms pcs/L 1.7×10⁷ 3 100

Example 2:

100 tons/day integrated sewage purification resource utilization device that purifies sewage into Surface III

Referring to Fig. 1, Fig. 2 and Fig. 3, for a 100-ton/day integrated sewage purification and recycling device, the geometric size of the container 1 is 7500×3100×3100 (mm), and coagulation sedimentation is installed in the container 1 device 100 , ion catalytic electrolytic denitrification device 200 , reduction tank 300 and biological aerated filter tank 400 .

Referring to Fig. 4, coagulation sedimentation device 100 is made of pH adjustment tank 110, coagulation tank 120, coagulation aid tank 130, sedimentation tank 140 and intermediate water tank 150; , the water inlet of the pH adjustment tank 110 is connected with the water outlet of the sewage adjustment tank, and the water outlet of the pH adjustment tank 110 is connected with the water inlet of the coagulation tank 120; the geometric size of the coagulation tank 120 is a 500-liter square bucket or drum , the water outlet of the coagulation aiding tank 120 is connected with the water inlet of the coagulation aiding tank 130; the geometric dimension of the coagulation aiding tank 130 is a 100-liter square bucket or drum, and the water outlet of the coagulation aiding tank 130 is connected with the water inlet of the sedimentation tank 140; The geometric size of the sedimentation tank 140 is a square barrel or a drum with a volume of 3000-5000 liters. The water outlet of the sedimentation tank 140 is connected with the water inlet of the intermediate tank 150, and a mud discharge port is also installed at the bottom of the sedimentation tank 140; the geometry of the intermediate tank 150 A square bucket or a drum with a size of 1000 liters, the water outlet of the middle pool 150 is connected to the ion catalytic electrolysis purification device 200;

Referring to Fig. 5, the ion-catalyzed electrolytic denitrification device 200 includes an electrolyzer 210, a DC power supply 220, a degassing tank 230, an ion catalyst dosing device 250 and an electrode cleaning device 240; ), the electrode group is installed in the pipe; the water inlet of the electrolysis machine 210 is connected with the water outlet of the intermediate pool 150 of the coagulation sedimentation device 100, and the water outlet of the electrolysis machine 210 is connected with the water inlet of the degassing tank 230; degassing The geometric dimensions of the tank 230 are: a drum of Φ1200×2800 (mm), the water outlet is 400 (mm) away from the top of the drum, connected to the biological aerated filter through a Φ100 pipeline, and the outlet pipe of the degassing tank 230 is also provided A circulating water pump 235 is connected with the water inlet pipe of the electrolysis machine 310 .

Referring to Fig. 6, the reduction tank 300 includes a water inlet pipe 310, a pipeline mixer 320 installed on the water inlet pipe, a water distributor 330, a reductant solution storage tank 340, a reductant solution metering pump 350 and a reduction tank 360, and the reduction tank cover In the degassing tank 230, the water inlet pipe 310 is connected with the water outlet 232 of the degassing tank 230, the water inlet pipe 310 is connected with the water distributor 330 arranged at the bottom of the reduction tank from top to bottom, and the reducing agent solution storage tank 340 is The agent solution metering delivery pump 350 communicates with the water inlet pipe 310, the reducing agent solution storage tank 340 is installed before the pipeline mixer 320, and a water pipe connected to the intermediate pool is also installed on the water inlet pipe 310.

Referring to Fig. 7 and Fig. 8, the BAF is composed of a BAF body 410, an aeration system 420 and a backwash system 430; the aeration system 420 is composed of a backwash tank 421, a backwash pump 422, a backwash Wash water supply pipe 423, backwash aeration fan 424, backwash aeration pipe 425 and backwash waste water tank 426; aeration system 430 consists of aeration fan 431, aeration main air pipe 432; biological aeration filter The main body is composed of pool body 411, water inlet pipe 412, long-handle filter head 413, support frame 414, filter material support layer 415 and filter material 416, aeration fan 431, aeration air pipe 432, and water outlet tank 417. The water inlet of the tank is connected with the water outlet of the reduction tank, the water outlet of the biological aerated filter is connected with the water inlet of the disinfection tank, and the water inlet pipe of the biological aerated filter is installed in the pipe ditch at the bottom of the filter; the biological aerated filter The aeration main air pipe is installed on one side of the bottom of the filter tank, and the aeration branch air pipe is installed under the filter brick or filter plate at the bottom of the filter tank.

Referring to Fig. 9, the photoelectric complementary power generation device 600 is composed of several solar panels 610, a combiner box 420, an inverter 630, an integrated sewage purification resource utilization system 640, and a bidirectional electric meter 650 dedicated to photovoltaic power generation; the solar panel 610 is a monocrystalline silicon panel or a polysilicon plate; the inverter 630 is respectively connected to the integrated sewage purification device 640 and to the power grid 660 through the bidirectional electric meter 650 .

When the power of the photoelectric complementary power generation device 600 is more than the power used by the integrated sewage purification and resource utilization system 640, the photoelectric complementary power generation device 600 supplies power to the grid 660 through the inverter 630 and the bidirectional electric meter 640; otherwise, when the photoelectric complementary power generation device When the power of 600 is less than the power used by the integrated sewage purification and resource utilization system 640 , the power grid 660 supplies power to the integrated sewage purification and resource utilization system 640 through the bidirectional electric meter 650 and the inverter 630 .

The electrode cleaning device 240 is composed of a pickling solution storage tank 241 and a pickling solution delivery pump 242, and the pickling solution is 2%-3% hydrochloric acid solution. The ion catalyst dosing device 250 is composed of a chloride ion catalyst solution storage tank 251 , a delivery pump 252 and a pipeline mixer 253 .

The measured indicators of sewage are shown in Table 3.

Table 3 The main pollutants of a certain sewage

serial number Pollutants unit Actual measured value design value Remark 1 pH dimensionless 7.1 6～9 1 COD_Cr mg/L 485 500 2 BOD₅ mg/L 210 250 3 Total Phosphorus mg/L 4.7 8.0 4 Ammonia nitrogen mg/L 28.2 35 5 total nitrogen mg/L 33.0 40 6 SS mg/L 300 300 7 Chroma Dilution factor 80 100 8 Chloride mg/L 92 150 9 Fecal coliforms pcs/L 1.53×10⁶

Step 1. Coagulation and sedimentation

Coagulation and sedimentation is to quantitatively pump the sewage from the adjustment tank to the pH adjustment tank 110, turn on the mixer, pump in 10% sodium hydroxide at a rate of 300ml/ ^m3 , stir, adjust the pH to 8.5, and then use the liquid level difference to flow into the coagulation tank In 120, pump 10% PAC solution at 1000ml/m3, stir, and then use the liquid level difference to flow into the coagulation aid pool 130, pump 1.0‰ PAM solution at 300ml/m3, stir, and then use the liquid level difference to aid coagulation The sewage in the coagulation tank 130 flows into the sedimentation tank 140 for sedimentation, and the supernatant of the sedimentation tank 140 flows into the intermediate water tank 150 by utilizing the liquid level difference.

Coagulation sedimentation is mainly used to remove a large amount of SS, COD _Cr , BOD ₅ , total phosphorus and various heavy metal ions in sewage. After coagulation sedimentation treatment, more than 95% of SS is removed, and 80% of COD _Cr and BOD ₅ are removed. 95%, more than 95% of total phosphorus is removed, and more than 95% of various heavy metal ions are removed;

Step 2. Ion-catalyzed electrolytic denitrification

After step (1) coagulation and sedimentation and stored in the intermediate pool at 150°C, the effluent was detected to have a concentration of 80mg/L. Since the concentration of chloride ions in the water body was lower than 100mg/L, start the chloride ion dosing pump and press 300ml/L Add 10-12% sodium hypochlorite or add sodium chloride solution at 80-100 mg/L, start the lift pump, pump the clear water obtained in step (1) coagulation and precipitation into the ion-catalyzed electrolyzer for electrolytic denitrification, the working voltage of the electrolyzer 55V, current 2800A, the clean water after electrolysis enters the degassing tank for gas-liquid separation, the upper air bubbles are scraped into the air bubble collection tank through the slag scraper, and the lower clear liquid is pumped into the electrolyzer again through the circulation pump for further electrolytic purification to ammonia nitrogen , total nitrogen, COD _Cr , and BOD ₅ are qualified and discharged into the biological aerated filter for aeration, and the residual sodium hypochlorite is removed and discharged into natural water bodies. Electrolysis is mainly used to remove major pollutants such as COD _Cr , BOD ₅ , total phosphorus, SS, ammonia nitrogen and total nitrogen remaining in sewage after coagulation and sedimentation treatment. The effluent of sewage after electrolysis purification meets the following indicators: chroma ≤ 2, COD _Cr ≤40mg/L, BOD ₅ ≤10mg/L, SS≤8mg/L, total nitrogen ≤3mg/L, ammonia nitrogen ≤1.5mg/L, total phosphorus ≤0.2mg/L.

Step 3. Restoration

Step (2) The water obtained by ion-catalyzed electrolytic denitrification is injected into the reduction tank 300 through the denitrification outlet, and 10% sodium sulfite solution is metered in to reduce and remove sodium hypochlorite in the water.

Step 4. Biological aerated filter treatment

The water obtained in step (3) is pumped into the denitrification deep bed filter through the lifting pump. After denitrification treatment, the effluent meets the following indicators: chroma≤2, COD≤18mg/L, BOD5≤2mg/L, SS≤ 5mg/L, total nitrogen ≤ 0.82mg/L, ammonia nitrogen ≤ 0.31mg/L, total phosphorus ≤ 0.19mg/L, and other pollutant indicators comply with Class III water in Table 1 of "Surface Water Environmental Quality Standards" (GB3838-2002) Corresponding indicator requirements.

Table 4 The effluent water quality after the sewage is treated by the integrated sewage purification device

serial number Pollutants unit Influent measured value Actual measured value of effluent Removal rate (%) 1 pH dimensionless 7.1 7.2 - 1 COD_Cr mg/L 485 18 96.27 2 BOD₅ mg/L 210 2 98.09 3 Total Phosphorus mg/L 4.7 0.19 99.05 4 Ammonia nitrogen mg/L 28.2 0.31 99.90 5 total nitrogen mg/L 33.0 0.82 97.52 6 SS mg/L 300 5 98.33 7 Chroma Dilution factor 80 1.5 98.13 8 Chloride mg/L 92 - - 9 Fecal coliforms pcs/L 6.3×10⁶ 3 100

Example 3:

A 200-ton/day integrated sewage purification resource utilization device that purifies sewage into surface III is shown in Figure 1, Figure 2 and Figure 3. A 200-ton/day photoelectric complementary integrated sewage purification resource utilization device has a container 1 The geometric size of the container is 3100×11500×3200 (mm), and the container 1 is equipped with a coagulation sedimentation device 100 , an ion catalytic electrolysis denitrification device 200 , a reduction tank 300 and a biological aerated filter 400 .

Referring to Fig. 4, coagulation sedimentation device 100 is made of pH adjustment tank 110, coagulation tank 120, coagulation aid tank 130, sedimentation tank 140 and intermediate water tank 150; , the water inlet of the pH adjustment tank 110 is connected with the water outlet of the sewage adjustment tank, and the water outlet of the pH adjustment tank 110 is connected with the water inlet of the coagulation tank 120; the geometric size of the coagulation tank 120 is a 1000-liter square bucket or drum , the water outlet of the coagulation aiding tank 120 is connected with the water inlet of the coagulation aiding tank 130; the geometric dimension of the coagulation aiding tank 130 is a 200-liter square bucket or drum, and the water outlet of the coagulation aiding tank 130 is connected with the water inlet of the sedimentation tank 140; The geometric size of the sedimentation tank 140 is a square barrel or a drum with a volume of 8,000 to 10,000 liters. The water outlet of the sedimentation tank 140 is connected to the water inlet of the intermediate pool 150, and a sludge outlet is also installed at the bottom of the sedimentation tank 140; the geometry of the intermediate pool 150 A square bucket or a drum with a size of 2000 liters, the water outlet of the middle pool 150 is connected with the ion catalytic electrolysis purification device 200 .

Referring to Fig. 5, the ion-catalyzed electrolytic denitrification device 200 includes an electrolyzer 210, a DC power supply 220, a degassing tank 230, an ion catalyst dosing device 250 and an electrode cleaning device 240; ), the electrode group is installed in the pipe; the water inlet of the electrolysis machine 210 is connected with the water outlet of the intermediate pool 150 of the coagulation sedimentation device 100, and the water outlet of the electrolysis machine 210 is connected with the water inlet of the degassing tank 230; degassing The geometric dimension of tank 230 is a drum of Φ1600×2800 (mm), and the water outlet is 400 (mm) away from the top of the drum, which is connected to the biological aerated filter through a Φ100 pipe, and the outlet pipe of degassing tank 230 is also provided with The circulating water pump 235 is connected to the water inlet pipe of the electrolysis machine 310, and the electrode cleaning device 240 is composed of a pickling solution storage tank 241 and a pickling solution delivery pump 242, and the pickling solution is 2% to 3% hydrochloric acid solution or 4% to 5% citric acid solution.

Referring to Fig. 6, the reduction tank 300 includes a water inlet pipe 310, a pipeline mixer 320 installed on the water inlet pipe, a water distributor 330, a reductant solution storage tank 340, a reductant solution metering pump 350 and a reduction tank 360, and the reduction tank cover In the degassing tank 230, the water inlet pipe 310 is connected with the water outlet 232 of the degassing tank 230, the water inlet pipe 310 is connected with the water distributor 330 arranged at the bottom of the reduction tank from top to bottom, and the reducing agent solution storage tank 340 is The agent solution metering delivery pump 350 communicates with the water inlet pipe 310, the reducing agent solution storage tank 340 is installed before the pipeline mixer 320, and a water pipe connected to the intermediate pool is also installed on the water inlet pipe 310.

7 and 8, the BAF 400 is composed of a BAF body 410, an aeration system 420 and a backwash system 430; the backwash system 420 consists of a backwash tank 421, a backwash pump 422, Backwash water supply pipe 423, backwash aeration fan 424, backwash aeration pipe 425 and backwash waste water tank 426; aeration system 430 consists of aeration fan 431, aeration main air pipe 432; aeration biological filter The main body of the pool is composed of pool body 411, water inlet pipe 412, long handle filter head 413, support frame 414, filter material support layer 415 and filter material 416, aeration fan 431, aeration air pipe 432, and water outlet tank 417. The water inlet of the filter is connected with the water outlet of the reduction tank, the water outlet of the biological aerated filter is connected with the water inlet of the disinfection tank, and the water inlet pipe of the biological aerated filter is installed in the pipe ditch at the bottom of the filter; the biological aerated filter The aeration main air pipe of the pool is installed on one side of the bottom of the filter tank, and the aeration branch air pipe is installed under the filter brick or filter plate at the bottom of the filter tank.

Referring to Fig. 9, the photoelectric complementary power generation device 600 is composed of several solar panels 610, a combiner box 420, an inverter 630, an integrated sewage purification resource utilization system 640, and a bidirectional electric meter 650 dedicated to photovoltaic power generation; the solar panel 610 is a monocrystalline silicon panel or a polysilicon plate; the inverter 630 is respectively connected to the integrated sewage purification device 640 and to the power grid 660 through the bidirectional electric meter 650 .

When the power of the photoelectric complementary power generation device 600 is more than the power used by the integrated sewage purification and resource utilization system 640, the photoelectric complementary power generation device 600 supplies power to the grid 660 through the inverter 630 and the bidirectional electric meter 640; otherwise, when the photoelectric complementary power generation device When the power of 600 is less than the power used by the integrated sewage purification and resource utilization system 640 , the power grid 660 supplies power to the integrated sewage purification and resource utilization system 640 through the bidirectional electric meter 650 and the inverter 630 . The ion catalyst dosing device 250 is composed of a chloride ion catalyst solution storage tank 251 , a delivery pump 252 and a pipeline mixer 253 .

The measured indicators of sewage are shown in Table 5.

Table 5 Concentration of main pollutants in a certain sewage

serial number Pollutants unit Actual measured value design value Remark 1 pH dimensionless 6.9 6～9 1 COD_Cr mg/L 190 300 2 BOD₅ mg/L 77 150 3 Total Phosphorus mg/L 3.5 5 4 Ammonia nitrogen mg/L 34.5 35 5 total nitrogen mg/L 42.1 50 6 SS mg/L 260 300 7 Chroma Dilution factor 120 150 8 Chloride mg/L 135 - 9 Fecal coliforms pcs/L 4.3×10⁶ -

Step 1. Coagulation and sedimentation

Coagulation and sedimentation is to quantitatively pump the sewage from the adjustment tank to the pH adjustment tank 110, turn on the mixer, pump in 10% sodium hydroxide at a rate of 500ml/ ^m3 , stir, adjust the pH to 9.0, and then use the liquid level difference to flow into the coagulation tank In 120, pump 10% PAC solution at 1200ml/ ^m3 , stir, and then use the liquid level difference to flow into the coagulation aid pool 130, pump 1.0‰ PAM solution at 300ml/ ^m3 , stir, and then use the liquid level difference The sewage in the coagulation aiding tank 130 flows into the sedimentation tank 140 for sedimentation, and the supernatant of the sedimentation tank 140 flows into the intermediate water tank 150 by utilizing the liquid level difference.

Coagulation sedimentation is mainly used to remove a large amount of SS, COD _Cr , BOD ₅ , total phosphorus and various heavy metal ions in sewage. After coagulation sedimentation treatment, more than 95% of SS is removed, and 80% of COD _Cr and BOD ₅ are removed. 95%, more than 95% of total phosphorus is removed, and more than 95% of various heavy metal ions are removed.

Step 2. Ion-catalyzed electrolytic denitrification

After step (1) coagulation and sedimentation and stored in the intermediate pool at 150°C, the effluent was tested and found to have a concentration of 43mg/L. Because the concentration of chloride ions in the water body was lower than 100mg/L, start the chloride ion dosing pump and press 500ml/L Add 10-12% sodium hypochlorite or add sodium chloride solution at 90-120mg/L, start the lift pump, pump the clear water obtained in step (1) coagulation and precipitation into the ion-catalyzed electrolyzer for electrolytic denitrification, the working voltage of the electrolyzer 48V, current 410A, the clean water after electrolysis enters the degassing tank for gas-liquid separation, the upper air bubbles are scraped into the air bubble collection tank through the slag scraper, and the lower clear liquid is pumped into the electrolyzer again through the circulating pump for further electrolytic purification to ammonia nitrogen , total nitrogen, COD _Cr , and BOD ₅ are qualified and discharged into the biological aerated filter for aeration, and the residual sodium hypochlorite is removed and discharged into natural water bodies. Electrolysis is mainly used to remove major pollutants such as COD _Cr , BOD ₅ , total phosphorus, SS, ammonia nitrogen and total nitrogen remaining in sewage after coagulation and sedimentation treatment. The effluent of sewage after electrolysis purification meets the following indicators: chroma ≤ 2, COD _Cr ≤40mg/L, BOD ₅ ≤10mg/L, SS≤8mg/L, total nitrogen ≤3mg/L, ammonia nitrogen ≤1.5mg/L, total phosphorus ≤0.2mg/L, fecal coliforms ≤3 /L.

Step 3. Restoration

Step (2) The water obtained by ion-catalyzed electrolytic denitrification is injected into the reduction tank 300 through the denitrification outlet, and 10% sodium sulfite solution is metered in to reduce and remove sodium hypochlorite in the water.

Step four, biological aerated filter treatment.

The water obtained in step (3) is pumped into the biological aerated filter through the lifting pump. After being treated by the biological filter, the effluent meets the following indicators: chromaticity ≤ 2, COD _Cr ≤ 15mg/L, BOD ₅ ≤ 1mg/L, SS≤4mg/L, total nitrogen≤0.77mg/L, ammonia nitrogen≤0.22mg/L, total phosphorus≤0.12mg/L, number of fecal coliforms≤3/L, and other pollutant indicators comply with "Surface Water Environmental Quality Standard "(GB3838-2002) Table 1 corresponding to the index requirements for Class III water, the main indicators of the effluent are shown in Table 6.

Table 6 Outlet Water Quality Indicators of Treated Sewage

serial number Pollutants unit Influent measured value Actual measured value of effluent Removal rate (%) 1 pH dimensionless 6.9 7.3 - 1 COD_Cr mg/L 190 15 92.11 2 BOD₅ mg/L 77 1 98.70 3 Total Phosphorus mg/L 3.5 0.12 96.29 4 Ammonia nitrogen mg/L 34.5 0.22 99.36 5 total nitrogen mg/L 42.1 0.77 98.17 6 SS mg/L 260 4 98.46 7 Chroma Dilution factor 120 2 98.33 8 Chloride mg/L 135 - - 9 Fecal coliforms pcs/L 4.3×10⁶ 3 100

Embodiment 4:

A 500 tons/day integrated sewage purification resource utilization device that purifies sewage into Surface III

Referring to Fig. 1, Fig. 2 and Fig. 3, for a 500-ton/day integrated sewage purification resource utilization device, the geometric size of the container 1 is 3100×13500×3200 (mm), and a coagulation and sedimentation device 100 is installed in the container 1 And ion catalytic electrolytic denitrification device 200, reduction tank 300 and biological aerated filter tank 400.

Referring to Fig. 4, coagulation sedimentation device 100 is made of pH adjustment tank 110, coagulation tank 120, coagulation aid tank 130, sedimentation tank 140 and intermediate pool 150; , the water inlet of the pH adjustment tank 110 is connected with the water outlet of the sewage adjustment tank, the water outlet of the pH adjustment tank 110 is connected with the water inlet of the coagulation tank 120; the geometric size of the coagulation tank 120 is a 2000-liter square bucket or drum , the water outlet of the coagulation aiding tank 120 is connected with the water inlet of the coagulation aiding tank 130; the geometric dimension of the coagulation aiding tank 130 is a 400-liter square bucket or drum, and the water outlet of the coagulation aiding tank 130 is connected with the water inlet of the sedimentation tank 140; The geometric size of the sedimentation tank 140 is a square barrel or a drum with a volume of 15,000 to 20,000 liters. The water outlet of the sedimentation tank 140 is connected to the water inlet of the intermediate pool 150, and a mud discharge port is also installed at the bottom of the sedimentation tank 140; the geometry of the intermediate pool 150 A square bucket or a drum with a size of 2000 liters, the water outlet of the middle pool 150 is connected to the ion catalytic electrolysis purification device 200;

More preferably, the coagulation and sedimentation device is made of carbon steel plates that are directly segmented and welded in the container 1 according to the design.

Referring to Fig. 5, the ion-catalyzed electrolytic denitrification device 200 includes an electrolyzer 210, a DC power supply 220, a degassing tank 230, an ion catalyst dosing device 250 and an electrode cleaning device 240; ) of 4 round pipes, electrode groups are installed in the pipe; the water inlet of the electrolysis machine 210 is connected with the water outlet of the intermediate pool 150 of the coagulation sedimentation device 100, and the water outlet of the electrolysis machine 210 is connected with the water inlet of the degassing tank 230; The geometric dimension of the degassing tank 230 is a drum of Φ1600×2800 (mm), and the water outlet is 400 (mm) away from the top of the drum, which is connected to the biological aerated filter through a Φ100 pipe, and the outlet pipe of the degassing tank 230 is also A circulating water pump 235 is connected to the water inlet pipe of the electrolysis machine 210. The electrode cleaning device 240 is composed of a pickling solution storage tank 241 and a pickling solution delivery pump 242. The pickling solution is 2% to 3% hydrochloric acid solution or 4% to 5% % citric acid solution.

Referring to Fig. 6, the reduction tank 300 includes a water inlet pipe 310, a pipeline mixer 320 installed on the water inlet pipe, a water distributor 330, a reductant solution storage tank 340, a reductant solution metering pump 350 and a reduction tank 360, and the reduction tank cover In the degassing tank 230, the water inlet pipe 310 is connected with the water outlet 232 of the degassing tank 230, the water inlet pipe 310 is connected with the water distributor 330 arranged at the bottom of the reduction tank from top to bottom, and the reducing agent solution storage tank 340 is The agent solution metering delivery pump 350 communicates with the water inlet pipe 310, the reducing agent solution storage tank 340 is installed before the pipeline mixer 320, and a water pipe connected to the intermediate pool is also installed on the water inlet pipe 310.

Referring to Fig. 7 and Fig. 8, the biological aerated filter 400 is composed of a biological aerated filter body 410, an aeration system 420 and a backwash system 430; the backwash system 420 is composed of a backwash tank 421, a backwash pump 422, Backwash water supply pipe 423, backwash aeration fan 424, backwash aeration pipe 425 and backwash waste water tank 426; aeration system 430 consists of aeration fan 431, aeration main air pipe 432; aeration biological filter The main body of the pool is composed of pool body 411, water inlet pipe 412, long handle filter head 413, support frame 414, filter material support layer 415 and filter material 416, aeration fan 431, aeration air pipe 432, and water outlet tank 417. The water inlet of the filter is connected with the water outlet of the reduction tank, the water outlet of the biological aerated filter is connected with the water inlet of the disinfection tank, and the water inlet pipe of the biological aerated filter is installed in the pipe ditch at the bottom of the filter; the biological aerated filter The aeration main air pipe of the pool is installed on one side of the bottom of the filter tank, and the aeration branch air pipe is installed under the filter brick or filter plate at the bottom of the filter tank.

Referring to Fig. 9, the photoelectric complementary power generation device 600 is composed of several solar panels 610, a combiner box 420, an inverter 630, an integrated sewage purification resource utilization system 640, and a bidirectional electric meter 650 dedicated to photovoltaic power generation; the solar panel 610 is a monocrystalline silicon panel or a polysilicon plate; the inverter 630 is respectively connected to the integrated sewage purification device 640 and to the power grid 660 through the bidirectional electric meter 650 .

When the power of the photoelectric complementary power generation device 600 is more than the power used by the integrated sewage purification and resource utilization system 640, the photoelectric complementary power generation device 600 supplies power to the grid 660 through the inverter 630 and the bidirectional electric meter 640; otherwise, when the photoelectric complementary power generation device When the power of 600 is less than the power used by the integrated sewage purification and resource utilization system 640 , the power grid 660 supplies power to the integrated sewage purification and resource utilization system 640 through the bidirectional electric meter 650 and the inverter 630 . The ion catalyst dosing device 250 is composed of a chloride ion catalyst solution storage tank 251 , a delivery pump 252 and a pipeline mixer 253 .

The measured indicators of sewage are shown in Table 7.

Table 7 Concentration of main pollutants in certain sewage

serial number Pollutants unit Actual measured value design value Remark 1 pH dimensionless 7.3 6～9 1 COD_Cr mg/L 700 700 2 BOD₅ mg/L 287 350 3 Total Phosphorus mg/L 7.5 8 4 Ammonia nitrogen mg/L 55.5 55 5 total nitrogen mg/L 70.0 70 6 SS mg/L 220 300 7 Chroma Dilution factor 110 150 8 Chloride mg/L 119.5 - 9 Fecal coliforms pcs/L 7.9×10⁶ -

Step 1. Coagulation and sedimentation

Coagulation and sedimentation is to quantitatively pump the sewage from the adjustment tank to the pH adjustment tank 110, turn on the mixer, pump in 10% sodium hydroxide at a rate of 350ml/ ^m3 , stir, adjust the pH to 9.2, and then use the liquid head to flow into the coagulation tank In 120, pump 10% PAC solution at 900ml/ ^m3 , stir, and then use the liquid level difference to flow into the coagulation aid tank 130, pump 1.0‰ PAM solution at 300ml/ ^m3 , stir, and then use the liquid level difference The sewage in the coagulation aiding tank 130 flows into the sedimentation tank 140 for sedimentation, and the supernatant of the sedimentation tank 140 flows into the intermediate water tank 150 by utilizing the liquid level difference.

Coagulation sedimentation is mainly used to remove a large amount of SS, COD _Cr , BOD ₅ , total phosphorus and various heavy metal ions in sewage. After coagulation sedimentation treatment, more than 95% of SS is removed, and 80% of COD _Cr and BOD ₅ are removed. 90%, more than 95% of total phosphorus is removed, and more than 95% of various heavy metal ions are removed.

Step 2. Ion-catalyzed electrolytic denitrification

After step (1) coagulation and sedimentation and stored in the intermediate pool at 150°C, the effluent was tested and found to have a concentration of 55mg/L. Since the concentration of chloride ions in the water body was lower than 100mg/L, start the chloride ion dosing pump at 600ml/L Add 10-12% sodium hypochlorite or add sodium chloride solution at 90-150 mg/L, start the lift pump, pump the clear water obtained in step (1) coagulation and precipitation into the ion-catalyzed electrolyzer for electrolytic denitrification, the working voltage of the electrolyzer is 45V, current 1000A, the clean water after electrolysis enters the degassing tank for gas-liquid separation, the upper air bubbles are scraped into the air bubble collection tank through the slag scraper, and the lower clear liquid is pumped into the electrolyzer again through the circulation pump for further electrolytic purification to ammonia nitrogen , total nitrogen, COD _Cr , and BOD ₅ are qualified and discharged into the biological aerated filter for aeration, and the residual sodium hypochlorite is removed and discharged into natural water bodies. Electrolysis is mainly used to remove major pollutants such as COD _Cr , BOD ₅ , total phosphorus, SS, ammonia nitrogen and total nitrogen remaining in sewage after coagulation and sedimentation treatment. The effluent of sewage after electrolysis purification meets the following indicators: chroma ≤ 2, COD _Cr ≤40mg/L, BOD ₅ ≤10mg/L, SS≤8mg/L, total nitrogen ≤2.6mg/L, ammonia nitrogen ≤1.5mg/L, total phosphorus ≤0.2mg/L.

Step 3. Restoration

Step (2) The water obtained by ion-catalyzed electrolytic denitrification is poured into the reduction tank 300 through the denitrification outlet, and 20% sodium sulfite solution is metered in to reduce and remove sodium hypochlorite in the water.

Step 4. Biological aerated filter treatment

The water obtained in step (3) is pumped into the biological aerated filter through the lifting pump, and after being treated by the biological aerated filter, the effluent meets the following indicators: chromaticity ≤ 2, COD _Cr ≤ 17.5mg/L, BOD ₅ ≤ 2mg /L, total nitrogen ≤ 0.65mg/L, ammonia nitrogen ≤ 0.05mg/L, total phosphorus ≤ 0.17mg/L, and other pollutant indicators comply with the Class III water corresponding to Table 1 of "Surface Water Environmental Quality Standard" (GB3838-2002) The main water quality indicators of the effluent are shown in Table 8.

Table 8 effluent water quality of treated sewage

serial number Pollutants unit Influent measured value Actual measured value of effluent Removal rate (%) 1 pH dimensionless 7.3 7.1 - 1 COD_Cr mg/L 700 17.5 97.50 2 BOD₅ mg/L 287 2 99.30 3 Total Phosphorus mg/L 7.5 0.17 97.73 4 Ammonia nitrogen mg/L 55.5 0.05 99.91 5 total nitrogen mg/L 70.0 0.65 99.07 6 SS mg/L 220 3 98.64 7 Chroma Dilution factor 110 2 98.18 8 Chloride mg/L 119.5 - - 9 Fecal coliforms pcs/L 7.9×10⁶ 3 100

The above is only a specific embodiment of the utility model, but the design concept of the utility model is not limited thereto, and any non-substantial modification of the utility model by using this concept should be an act of violating the protection scope of the utility model. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (8)

1. An integrated sewage purification system that purifies sewage into Class III water on the surface, it is characterized in that it includes a container, which is equipped with a photoelectric complementary power generation device, a sewage purification and resource utilization device, and the photoelectric complementary power generation device It includes several solar panels, combiner boxes, inverters, and two-way electric meters dedicated to photovoltaic power generation; the sewage purification and resource utilization device is connected to a power grid connected by a two-way electric meter through an inverter, and the sewage purification and resource utilization device includes Coagulation and sedimentation device, ion catalytic electrolysis denitrification device, reduction tank, biological aerated filter. 2. An integrated sewage purification system for purifying sewage into Class III surface water according to claim 1, wherein the coagulation and sedimentation device includes a pH adjustment tank, a coagulation tank, a coagulation aid tank, a sedimentation pool and an intermediate pool, the water inlet of the pH adjustment tank is connected to the water outlet of the sewage adjustment tank, the water outlet of the pH adjustment tank is connected to the water inlet of the coagulation tank, and the water outlet of the coagulation aid tank is connected to the The water inlet is connected, the water outlet of the coagulation aiding tank is connected with the water inlet of the sedimentation tank, the water outlet of the sedimentation tank is connected with the water inlet of the intermediate pool, the sludge outlet of the sedimentation tank is connected with the inlet of the sludge thickening tank, and the The water outlet of the middle pool is connected to the ion-catalyzed electrolytic denitrification device; The ion-catalyzed electrolytic denitrification device includes an electrolyzer, a DC power supply, a degassing tank, an ion catalyst dosing device, and an electrode cleaning device. The water inlet of the electrolyzer is connected to the water outlet of the intermediate pool of the coagulation sedimentation device. The water outlet of the electrolyzer is connected with the water inlet of the degassing tank; the pipeline mixer for mixing the ion catalyst is also installed in the pipeline connected between the intermediate pool and the electrolyzer; the water outlet pipe of the ion catalyst dosing device is connected with the The water inlet pipe connection of the electrolysis machine is installed before the pipe mixer of the water inlet pipe of the electrolysis machine; the water outlet of the degassing tank is set at 500-1000mm from the top of the degassing tank; the water outlet of the degassing tank is connected with the aeration The water inlet pipe of the biofilter is connected, and a sewage circulation port is also provided at a place 500-1000 mm away from the water outlet of the degassing tank, and is connected with the water inlet pipe of the electrolysis machine through a circulating water pump and a water pipe; the biological aerated filter The water outlet is connected to the clear water discharge port; the electrode cleaning device is composed of a pickling solution storage tank and a pickling solution delivery pump, and the pickling solution uses 2% to 3% hydrochloric acid solution or 4% to 6% citric acid solution ; The reduction tank includes a water inlet pipe, a pipeline mixer installed on the water inlet pipe, a water distributor, a reducing agent solution storage tank and a reducing agent solution metering delivery pump. The reduction tank is set in the degassing tank, and the reduction tank The water inlet pipe is connected to the water outlet of the degassing tank, and the water inlet pipe of the reduction tank is connected from top to bottom with the water distributor arranged at the bottom of the reduction tank. The water inlet pipe of the reducing agent solution storage tank is installed before the pipeline mixer, and a water pipe connected to the intermediate pool is also installed on the water inlet pipe of the reduction tank; The biological aerated filter includes a main body of the aerated filter and a backwash system, and the main body of the aerated filter includes a tank body, a filter plate installed in the tank body, an aeration air duct, a backwash air duct, and a filter material; The main body of the aeration filter is also equipped with an aeration fan and an air duct; the backwash system includes a clean water storage tank, a clean water pump, and a backwash water storage tank; the clean water storage tank of the backwash system and the bottom of the filter The cleaning water inlet is connected, the backwash water outlet on the top of the filter is connected to the inlet of the backwash water storage tank, the water outlet of the backwash water storage tank is connected to the water inlet of the coagulation sedimentation device, and the backwash water storage tank The sludge outlet at the bottom of the tank is connected to the sludge tank. 3. An integrated sewage purification system for purifying sewage into Class III water on the surface according to claim 1, wherein the solar panel is a monocrystalline silicon panel or a polycrystalline silicon panel, when the photovoltaic power generation is more than When the electricity used by the sewage purification resource utilization device integrated in the container is used, the photovoltaic power generation supplies power to the grid through the inverter and the bidirectional meter. Conversely, when the photovoltaic power generation is less than the sewage purification resource utilization device integrated in the container. When the power is low, the electricity is supplied from the grid to the electrical appliances through the ammeter and the inverter. 4. A kind of integrated sewage purification system purifying sewage into surface III water according to claim 2, characterized in that, the pH adjustment tank, the coagulation tank, and the coagulation aid tank are respectively provided with a pH regulator, Coagulant and coagulant aid dosing device; the pH regulator, coagulant and coagulant aid dosing device are respectively composed of pH regulator storage tank, coagulant storage tank, coagulant aid storage tank and dosing pump Composition, the pH regulator can be directly quantitatively added to the water delivery pipeline equipped with a pipeline mixer. 5. An integrated sewage purification system for purifying sewage into Class III water on the surface according to claim 1, characterized in that the coagulation and sedimentation device is formed by welding carbon steel plates directly in the container according to the design, The water inlet of the degassing tank of the catalytic electrolytic denitrification device is connected with the water distributor located at the bottom of the degassing tank, and the water outlet of the upper part of the degassing tank is connected with the water inlet pipe of the biological aerated filter. The outlet pipe of the biofilter is connected to the clear water outlet, and a spray device is installed on the upper part of the bubble scum collection tank. The electrolytic purification device also includes a chlorine ion catalyst solution dosing device for adding sodium chloride or sodium hypochlorite. Chloride ions for ionic catalysis. 6. An integrated sewage purification system for purifying sewage into Class III water on the surface according to claim 1, characterized in that, the ion-catalyzed electrolytic denitrification device also includes a host pickling system, and the host pickling system Including pickling solution preparation tank, pickling solution delivery pump. 7. An integrated sewage purification system for purifying sewage into surface class III water according to claim 1, characterized in that the integrated sewage purification system for purifying sewage into surface class III water has no traditional Carbon source dosing system for biological aerated filter. 8. The integrated sewage purification system for purifying sewage into Class III surface water according to claim 1, characterized in that, the water inlet of the sewage purification and resource utilization device is equipped with COD _Cr , ammonia nitrogen, total One or more of the on-line monitors for nitrogen and total phosphorus, and the outlet of the sewage purification and resource utilization device is also equipped with an on-line monitor for residual chlorine, online monitors for COD _Cr , ammonia nitrogen, total nitrogen and total phosphorus one or more of.

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