CN112429913A - High-concentration wastewater treatment system and high-concentration wastewater treatment process - Google Patents

Abstract

The invention discloses a high-concentration wastewater treatment system and a high-concentration wastewater treatment process, wherein the high-concentration wastewater treatment system comprises a pretreatment system, a biochemical treatment system and a deepening treatment system; the pretreatment system comprises a first water collecting tank, a second water collecting tank, a coagulation reaction tank and a plate-and-frame filter press; the biochemical treatment system comprises an adjusting tank, a UASB anaerobic tank, a hydrolysis acidification tank, a DAT aerobic tank and an IAT aerobic tank; the deepening treatment system comprises a first sedimentation tank, a water storage tank, a reaction tank and a second sedimentation tank. By adopting a high-efficiency biochemical combined process, the CODcr removal rate of the wastewater treated by the treatment process can reach more than 99 percent, the ammonia nitrogen removal rate can reach more than 90 percent, and the effluent quality is superior to the first-class standard requirement of the second time interval of the Water pollutant discharge Standard Limit (DB44/26-2001) of Guangdong province, thereby realizing the design aim of good sewage treatment effect.

Description

High-concentration wastewater treatment system and high-concentration wastewater treatment process

Technical Field

The invention relates to the field of sewage treatment, in particular to a high-concentration wastewater treatment system and a high-concentration wastewater treatment process.

Background

With the increasing importance of the world on environmental protection, China also pays more attention to sewage discharge treatment in industrial production, each index in the discharged sewage is very clear, and enterprises are required to discharge the sewage in the industrial production not to exceed the index, so how to treat the sewage is important for reasonable and normal production and environmental protection.

Disclosure of Invention

The invention mainly aims to provide a high-concentration wastewater treatment system with good sewage treatment effect and a high-concentration wastewater treatment process.

The invention provides a high-concentration wastewater treatment system, which comprises a pretreatment system, a biochemical treatment system and a deepening treatment system; the pretreatment system comprises a coagulation reaction tank and a plate-frame compressor, and the SS content in the high-concentration wastewater is reduced by the pretreatment system so as to facilitate subsequent treatment; the biochemical treatment system comprises an anaerobic treatment system and an aerobic treatment system, wherein the anaerobic treatment system comprises a UASB anaerobic tank and a hydrolysis acidification tank, and the aerobic treatment system comprises a DAT aerobic tank and an IAT aerobic tank; the concentration of organic matters in the high-concentration wastewater can be effectively reduced through the two-stage anaerobic treatment system and the two-stage aerobic treatment system; the deepening treatment system comprises a reaction tank, and the concentration of organic matters in the high-concentration wastewater is further reduced by a physical means by adding a second coagulant and a strong oxidant into the reaction tank so as to meet the discharge requirement.

Preferably, the pretreatment system further comprises a first catch basin and a second catch basin; the water inlet pipeline of the first water collecting tank is connected with a wastewater drainage pipeline and is used for carrying out oil removal treatment on a small amount of floating solvents in wastewater; the water inlet pipeline of the second water collecting tank is connected with the water drainage pipeline of the first water collecting tank and is used for homogenizing and equalizing the wastewater entering the second water collecting tank from the first water collecting tank; a water inlet pipeline of the coagulation reaction tank is connected with a water drainage pipeline of the second water collecting tank, an aeration system is arranged at the bottom of the coagulation reaction tank, and pollutants in water are demulsified and coagulated into large particles by the aeration system and a first coagulant added into the coagulation reaction tank; and the water inlet of the plate and frame filter press is connected with the drainage pipeline of the coagulation reaction tank, and large particles in the wastewater are retained in the plate and frame filter press through the plate and frame filter press.

Preferably, the biochemical treatment system further comprises an adjusting tank, wherein a water inlet pipeline of the adjusting tank is connected with a water outlet of the plate-and-frame filter press, and wastewater discharged from the plate-and-frame filter press is homogenized and equalized through the adjusting tank; a water inlet pipeline of the UASB anaerobic tank is connected with a water discharge pipeline of the adjusting tank, and organic matters in the wastewater discharged from the adjusting tank are decomposed and discharged through the UASB anaerobic tank; a water inlet pipeline of the hydrolysis acidification tank is connected with a water drainage pipeline of the UASB anaerobic tank, and part of macromolecular long-chain organic matters are degraded into micromolecular organic matters through the hydrolysis acidification tank, so that the biodegradability of the wastewater is improved; the water inlet pipeline of the DAT aerobic tank is connected with the water discharge pipeline of the hydrolysis acidification tank, and a large amount of organic matters in the sewage can be removed through the DAT tank; the water inlet pipeline of the IAT aerobic tank is connected with the water outlet pipeline of the DAT aerobic tank, organic matters in water can be further removed through the IAT aerobic tank, and ammonia nitrogen in the water is further removed to reach the discharge standard.

Preferably, the deepening treatment system further comprises a first sedimentation tank and a second sedimentation tank; the water inlet pipeline of the first sedimentation tank is connected with the drainage pipeline of the IAT aerobic tank, wastewater discharged from the IAT aerobic tank can be settled through the first sedimentation tank, the first sedimentation tank is respectively connected with the UASB anaerobic tank, the hydrolysis acidification tank, the DAT aerobic tank, the IAT aerobic tank and the second water collecting tank through sludge backflow pipelines, so that sludge generated after settlement is discharged back to the UASB anaerobic tank, the hydrolysis acidification tank, the DAT aerobic tank and the IAT aerobic tank through the sludge backflow pipelines, and redundant sludge is discharged back to the second water collecting tank; a water inlet pipeline of the reaction tank is connected with a water drainage pipeline of the first sedimentation tank, and a second coagulant and a strong oxidant are added into the wastewater discharged from the first sedimentation tank in the reaction tank so as to generate a condensate of the residual organic matters; and the water inlet pipeline of the second sedimentation tank is connected with the water drainage pipeline of the reaction tank, and the second sedimentation tank is used for settling the wastewater discharged from the reaction tank to realize mud-water separation, so that the discharge requirement is met.

Preferably, a sludge return pipe is arranged on the second sedimentation tank, and the second sedimentation tank returns sludge to the second water collecting tank through the sludge return pipe.

Preferably, still be provided with waste water backflow pipeline on the UASB anaerobism pond, the waste water backflow pipeline other end with the equalizing basin is connected, can will UASB anaerobism pond does not handle complete waste water backward flow and returns the equalizing basin, and with input back again after the waste water in the equalizing basin mixes UASB anaerobism pond and handles once more.

Preferably, the first coagulant is a mixture of lime, PAC and PAM.

Preferably, the second coagulant is a mixture of PAC and PAM.

Preferably, the strong oxidant is a fenton reagent or a special CODcr degrading agent.

Preferably, the system further comprises an air blower, the air blower is connected with an air pipeline, the other end of the air pipeline is respectively connected with the second water collecting tank, the DAT aerobic tank and the IAT aerobic tank, jet aeration is input into the DAT aerobic tank, and blast aeration is input into the IAT aerobic tank and the second water collecting tank.

Preferably, the sewage treatment device further comprises a water storage tank, wherein the drainage pipeline of the first sedimentation tank is connected with the water inlet pipeline of the water storage tank, and when the internal water level of the first sedimentation tank exceeds the drainage pipeline of the first sedimentation tank, the wastewater in the first sedimentation tank flows into the water storage tank in a self-flowing mode; and the drainage pipeline of the reservoir is connected with the water inlet pipeline of the reaction tank.

A high-concentration wastewater treatment process comprises the following treatment processes:

(1) mixing and discharging sewage into a first water collecting tank, carrying out oil separation treatment on a solvent floating in the first water collecting tank, and outputting the wastewater treated in the first water collecting tank;

(2) inputting the wastewater treated by the first water collecting tank into a second water collecting tank, realizing uniform homogenization in the second water collecting tank, and outputting the wastewater treated by the second water collecting tank;

(3) inputting the wastewater treated by the second water collecting tank into a coagulation reaction tank, wherein an aeration system is arranged at the bottom of the coagulation reaction tank, so that the wastewater treated by the second water collecting tank is uniformly mixed with the residual sludge in the coagulation reaction tank, and a first coagulant is added into the coagulation reaction tank, wherein the first coagulant is a mixture of lime, PAC (polyaluminium chloride) and PAM (polyacrylamide), and the first coagulant reacts with pollutants in the coagulation reaction tank, so that emulsion breaking and coagulation are carried out to obtain large particles, and the wastewater treated by the coagulation reaction tank containing the large particles is output;

(4) and inputting the wastewater treated by the coagulation reaction tank into a plate-and-frame filter press, and performing dehydration reaction by using the plate-and-frame filter press. At the moment, the fibers and the agglomerated mucilage in the wastewater treated by the coagulation reaction tank are intercepted in the plate-and-frame filter press and output to the wastewater treated by the plate-and-frame filter press;

(5) inputting the wastewater treated by the plate-and-frame filter press into a regulating reservoir, realizing uniform homogenization in the regulating reservoir, and outputting the wastewater treated by the regulating reservoir;

(6) inputting the wastewater treated by the regulating tank into a UASB anaerobic tank to perform anaerobic fermentation through a high-load anaerobic pollution bed; in a UASB anaerobic tank, organic matters in the wastewater treated by the regulating tank are decomposed into CH4, CO2 and other gases to be discharged, so that the concentration of the organic matters in the wastewater is effectively reduced, a wastewater backflow pipeline is further arranged between the USAB anaerobic tank and the regulating tank, circular treatment can be realized through the wastewater backflow pipeline, and the UASB anaerobic tank outputs the wastewater treated by the UASB anaerobic tank;

(7) inputting the wastewater treated by the UASB anaerobic tank into a hydrolysis acidification tank, degrading part of macromolecular long-chain organic matters into micromolecular organic matters through the hydrolysis acidification tank, improving the biodegradability of the wastewater, and outputting the wastewater treated by the hydrolysis acidification tank;

(8) inputting the wastewater treated by the hydrolysis acidification tank into a DAT aerobic tank, wherein the treatment process of the aerobic tank adopts a DAT-IAT combined aerobic process, the sewage is efficiently degraded in the DAT aerobic tank, and a large amount of organic matters in the sewage can be removed by the DAT aerobic tank; outputting the wastewater treated by the DAT aerobic tank;

(9) inputting the wastewater treated by the DAT aerobic tank into an IAT aerobic tank, further removing organic matters in the water and further removing ammonia nitrogen in the water under the alternate anoxic-aerobic treatment to meet the discharge requirement; outputting the wastewater treated by the IAT aerobic tank;

(10) inputting the wastewater treated by the IAT aerobic tank into a first sedimentation tank, effectively settling the wastewater discharged from the IAT aerobic tank through the first sedimentation tank, and outputting the wastewater treated by the first sedimentation tank; the IAT aerobic pool waste water carries a large amount of activated sludge, the first sedimentation pool is respectively connected with the UASB anaerobic pool, the hydrolysis acidification pool, the DAT aerobic pool, the IAT aerobic pool and the second water collecting pool through a sludge return pipeline, so that the sludge generated after sedimentation is preferentially discharged back to the UASB anaerobic pool, the hydrolysis acidification pool, the DAT aerobic pool and the IAT aerobic pool through the sludge return pipeline, and if the sludge is redundant, the sludge is discharged back to the second water collecting pool;

(11) inputting the wastewater treated by the first sedimentation tank into a reservoir in a self-inflow mode, and outputting the wastewater treated by the reservoir;

(12) inputting the wastewater treated by the reservoir into a reaction tank, adding a second coagulant and a combined strong oxidant, performing second coagulation to obtain a mixture of PAC and PAM, reacting the second coagulant with undegraded organic matters and suspended matters in the wastewater of the reservoir to generate flocculate, and outputting the wastewater treated by the reaction tank;

(13) and inputting the wastewater treated by the reaction tank into a second sedimentation tank, carrying out mud-water separation in the second sedimentation tank, outputting the treated clean wastewater and discharging.

The high-concentration wastewater treatment system and the high-concentration wastewater treatment process have the beneficial effects that:

1. the sludge tank and the coagulation reaction tank are not arranged, the mud bucket is directly connected with the plate-and-frame filter press for mud-water separation, and insoluble pollutants are removed to the maximum extent by the plate-and-frame filter press.

2. The organic matters in the water are fully decomposed by a strong oxidant (Fenton reagent) under the action of the strong oxidant and long-time oxidation.

3. A high-load aerobic process and a low-load aerobic combined process are adopted, organic matters are efficiently decomposed in a high-load DAT aerobic pool, and the organic matters and ammonia nitrogen in water are decomposed in a low-load IAT aerobic pool.

4. A high-efficiency anaerobic reactor-UASB is adopted, the anaerobic reaction reaches a methanation stage, organic matters are decomposed into methane, carbon dioxide and other gases to be discharged, and therefore the COD concentration in water is reduced. The scheme adopts an upflow anaerobic sludge blanket (UASB anaerobic reactor), and the method has higher efficiency for treating the high-concentration organic wastewater, saves the occupied land and has low operation cost.

Drawings

FIG. 1 is a process flow diagram of a high-strength wastewater treatment system and a high-strength wastewater treatment process according to the present invention;

FIG. 2 is a diagram showing the removal effect of the high concentration wastewater treatment system and the high concentration wastewater treatment process according to the present invention;

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-2, an embodiment of the high-concentration wastewater treatment system of the present invention is presented:

a high-concentration wastewater treatment system comprises a pretreatment system, a biochemical treatment system and a deepening treatment system; the pretreatment system comprises a first water collecting tank, a second water collecting tank, a coagulation reaction tank and a plate-and-frame filter press; the biochemical treatment system comprises an adjusting tank, a UASB anaerobic tank, a hydrolysis acidification tank, a DAT aerobic tank and an IAT aerobic tank; the deepening treatment system comprises a first sedimentation tank, a water storage tank, a reaction tank and a second sedimentation tank.

And the water inlet pipeline of the first water collecting tank is connected with a wastewater sewage pipeline and is used for carrying out oil removal treatment on a small amount of floating solvents in wastewater.

The water inlet pipeline of the second water collecting tank is connected with the water discharge pipeline of the first water collecting tank and used for enabling the wastewater entering the second water collecting tank from the first water collecting tank to be uniform in volume.

The water inlet pipeline of the coagulation reaction tank is connected with the water drainage pipeline of the second water collecting tank, the bottom of the coagulation reaction tank is provided with an aeration system, and a first coagulant is added into the coagulation reaction tank through the aeration system, so that pollutants in water are demulsified and coagulated into large particles. The first coagulant is a mixture of lime, PAC and PAM.

The water inlet of the plate and frame filter press is connected with the drainage pipeline of the coagulation reaction tank, and large particles in the wastewater are retained in the plate and frame filter press through the plate and frame filter press.

The inlet channel of equalizing basin and the outlet connection of plate and frame filter press make the waste water homogeneity of slabstone filter press exhaust even volume through the equalizing basin.

The water inlet pipeline of the UASB anaerobic tank is connected with the water discharge pipeline of the regulating tank, and organic matters in the wastewater discharged by the regulating tank are decomposed and discharged through the UASB anaerobic tank. The UASB anaerobic tank is also provided with a wastewater backflow pipeline, the other end of the wastewater backflow pipeline is connected with the regulating tank, wastewater which is not completely treated in the UASB anaerobic tank can flow back to the regulating tank, and the wastewater is mixed with the wastewater in the regulating tank and then is input back to the UASB anaerobic tank for treatment again.

The DAT aerobic tank is connected with a water inlet pipeline of the DAT aerobic tank and a water discharge pipeline of the hydrolysis acidification tank, the DAT-IAT combined aerobic process is adopted in the aerobic process, sewage is efficiently degraded in the high-load aerobic tank (DAT tank), and the DAT tank can remove a large amount of organic matters in the sewage due to the high biodegradability of the sewage.

An inlet pipeline of the IAT aerobic tank is connected with an outlet pipeline of the DAT aerobic tank, wastewater is subjected to low-load IAT treatment, organic matters in the water are further removed under alternative anoxic-aerobic treatment, and ammonia nitrogen in the water is further removed to reach the discharge standard. .

The inlet channel of the first pond that sinks and the drainage pipe connection of IAT aerobic tank, IAT pond play water and get into first heavy pond in, IAT aerobic tank goes out water and carries a large amount of activated sludge, can subside these mud through first heavy pond, first heavy pond pass through mud return line respectively with UASB anaerobism pond, hydrolysis acidification pond, DAT aerobic tank, IAT aerobic tank and second catch basin are connected to preferentially arrange back to UASB anaerobism pond, hydrolysis acidification pond, DAT aerobic tank and IAT aerobic tank through mud return line after will subsiding the mud that produces, if have in addition unnecessary mud then arrange back to the second catch basin in.

And a drainage pipeline of the reservoir is connected with a water inlet pipeline of the reaction tank. The residual organic matters are formed into agglomerates by adding a second coagulant and a combined strong oxidant into the wastewater discharged from the first sedimentation tank in the reaction tank. The second coagulant may be PAC as well as PAM.

The water inlet pipeline of the second sedimentation tank is connected with the water drainage pipeline of the reaction tank, and the waste water discharged from the reaction tank is settled through the second sedimentation tank, so that mud-water separation is realized, and the discharge requirement is met. A sludge return pipeline is also arranged on the second sedimentation tank, and the second sedimentation tank returns the sludge to the second water collecting tank through the sludge return pipeline

The air blower is connected with the air transmission pipeline, the other end of the air transmission pipeline is respectively connected with the second water collecting tank, the DAT aerobic tank and the IAT aerobic tank, jet aeration is input into the DAT aerobic tank, and blast aeration is input into the IAT aerobic tank and the second water collecting tank.

The treatment effect after the treatment of the system is shown in figure 2.

The CODcr removal rate of the wastewater treated by the treatment system can reach more than 99 percent, the ammonia nitrogen removal rate can reach more than 90 percent, and the effluent quality is superior to the first-class standard requirement of the second time interval of the Water pollutant discharge Standard Limit (DB44/26-2001) of Guangdong province. Thereby realizing the design purpose of good sewage treatment effect.

Referring to fig. 1 to 2, an embodiment of the high concentration wastewater treatment process of the present invention is presented:

a high-concentration wastewater treatment process is characterized by comprising the following treatment processes:

(1) mixing and discharging the sewage into a first water collecting tank, carrying out oil removal treatment on the solvent floating in the first water collecting tank, and outputting the wastewater treated in the first water collecting tank;

(2) inputting the wastewater treated by the first water collecting tank into a second water collecting tank, realizing homogeneous and uniform amount in the second water collecting tank, and outputting the wastewater treated by the second water collecting tank;

(3) inputting the wastewater treated by the second water collecting tank into a coagulation reaction tank, wherein an aeration system is arranged at the bottom of the coagulation reaction tank, so that the wastewater treated by the second water collecting tank is uniformly mixed with the residual sludge in the coagulation reaction tank, and a first coagulant is added into the coagulation reaction tank, wherein the first coagulant is a mixture of lime, PAC (polyaluminium chloride) and PAM (polyacrylamide), and the first coagulant reacts with pollutants in the coagulation reaction tank, so that emulsion breaking and coagulation are carried out to form large particles, and the wastewater treated by the coagulation reaction tank containing the large particles is output;

(4) and (4) inputting the wastewater treated by the coagulation reaction tank into a plate-and-frame filter press, and performing dehydration reaction by using the plate-and-frame filter press. At the moment, the fibers and the agglomerated mucilage in the wastewater treated by the coagulation reaction tank are intercepted in the plate-and-frame filter press and output to the wastewater treated by the plate-and-frame filter press;

(5) inputting the wastewater treated by the plate-and-frame filter press into a regulating reservoir, realizing uniform homogenization in the regulating reservoir, and outputting the wastewater treated by the regulating reservoir;

(6) inputting the wastewater treated by the regulating tank into a UASB anaerobic tank to perform anaerobic fermentation through a high-load anaerobic pollution bed; in a UASB anaerobic tank, organic matters in the wastewater treated by the regulating tank are decomposed into gases such as CH4, CO2 and the like and discharged outside, so that the concentration of the organic matters in the wastewater is effectively reduced, a wastewater backflow pipeline is arranged between the USAB anaerobic tank and the regulating tank, circular treatment can be realized through the wastewater backflow pipeline, and the UASB anaerobic tank outputs the wastewater treated by the UASB anaerobic tank;

(7) inputting the wastewater treated by the UASB anaerobic tank into a hydrolysis acidification tank, degrading partial organic matters which are not completely biochemically degraded in the wastewater discharged from the UASB anaerobic tank by the hydrolysis acidification tank, and outputting the wastewater treated by the hydrolysis acidification tank;

(8) inputting the wastewater treated by the hydrolysis acidification tank into a DAT aerobic tank, wherein the treatment process of the aerobic tank adopts a DAT-IAT combined aerobic process, the sewage is efficiently degraded in the DAT aerobic tank, and a large amount of organic matters in the sewage can be removed by the DAT aerobic tank; outputting the wastewater treated by the DAT aerobic tank;

(9) inputting the wastewater treated by the DAT aerobic tank into an IAT aerobic tank, further removing organic matters in the water and further removing ammonia nitrogen in the water under the alternate anoxic-aerobic treatment to meet the discharge requirement; outputting the wastewater treated by the IAT aerobic tank;

(10) inputting the wastewater treated by the IAT aerobic tank into a first sedimentation tank, effectively settling the wastewater discharged from the IAT aerobic tank through the first sedimentation tank, and outputting the wastewater treated by the first sedimentation tank; the IAT aerobic pool waste water carries a large amount of activated sludge, the first sedimentation pool is respectively connected with the UASB anaerobic pool, the hydrolysis acidification pool, the DAT aerobic pool, the IAT aerobic pool and the second water collecting pool through a sludge return pipeline, so that the sludge generated after sedimentation is preferentially discharged back to the UASB anaerobic pool, the hydrolysis acidification pool, the DAT aerobic pool and the IAT aerobic pool through the sludge return pipeline, and if the sludge is redundant, the sludge is discharged back to the second water collecting pool;

(11) inputting the wastewater treated by the first sedimentation tank into a reservoir in a self-inflow mode, and outputting the wastewater treated by the reservoir;

(12) inputting the wastewater treated by the reservoir into a reaction tank, adding a second coagulant, wherein the second coagulant can be PAC (polyaluminium chloride) and PAM (polyacrylamide), reacting the second coagulant with undegraded organic matters and suspended matters in the wastewater of the reservoir to generate flocculate, and outputting the wastewater treated by the reaction tank;

(13) and inputting the wastewater treated by the reaction tank into a second sedimentation tank, carrying out mud-water separation in the second sedimentation tank, outputting the treated clean wastewater and discharging.

The treatment effect after the production process is shown in figure 2.

By adopting a high-efficiency biochemical combined process, the CODcr removal rate of the wastewater treated by the treatment process can reach more than 99 percent, the ammonia nitrogen removal rate can reach more than 90 percent, and the effluent quality is superior to the first-class standard requirement of the second time period of the Water pollutant discharge Standard Limit (DB44/26-2001) of Guangdong province. Thereby realizing the design purpose of good sewage treatment effect.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.

Claims (12)

1. A high-concentration wastewater treatment system is characterized by comprising a pretreatment system, a biochemical treatment system and a deepening treatment system; the pretreatment system comprises a coagulation reaction tank and a plate-frame compressor, and the SS content in the high-concentration wastewater is reduced by the pretreatment system so as to facilitate subsequent treatment; the biochemical treatment system comprises an anaerobic treatment system and an aerobic treatment system, wherein the anaerobic treatment system comprises a UASB anaerobic tank and a hydrolysis acidification tank, and the aerobic treatment system comprises a DAT aerobic tank and an IAT aerobic tank; the concentration of organic matters in the high-concentration wastewater can be effectively reduced through the two-stage anaerobic treatment system and the two-stage aerobic treatment system; the deepening treatment system comprises a reaction tank, and the concentration of organic matters in the high-concentration wastewater is further reduced by adding a second coagulant and a strong oxidant into the reaction tank so as to meet the discharge requirement.

2. The high-concentration wastewater treatment system according to claim 1, wherein the pretreatment system further comprises a first catch basin and a second catch basin; the water inlet pipeline of the first water collecting tank is connected with a wastewater drainage pipeline and is used for carrying out oil removal treatment on a small amount of floating solvents in wastewater; the water inlet pipeline of the second water collecting tank is connected with the water drainage pipeline of the first water collecting tank and is used for homogenizing and equalizing the wastewater entering the second water collecting tank from the first water collecting tank; a water inlet pipeline of the coagulation reaction tank is connected with a water drainage pipeline of the second water collecting tank, an aeration system is arranged at the bottom of the coagulation reaction tank, and pollutants in water are demulsified and coagulated into large particles by the aeration system and a first coagulant added into the coagulation reaction tank; and the water inlet of the plate and frame filter press is connected with the drainage pipeline of the coagulation reaction tank, and large particles in the wastewater are retained in the plate and frame filter press through the plate and frame filter press.

3. The high concentration wastewater treatment system according to claim 2, wherein the biochemical treatment system further comprises a regulating tank, wherein a water inlet pipeline of the regulating tank is connected with a water outlet of the plate-and-frame filter press, and wastewater discharged from the plate-and-frame filter press is homogenized and equalized through the regulating tank; a water inlet pipeline of the UASB anaerobic tank is connected with a water discharge pipeline of the adjusting tank, and organic matters in the wastewater discharged from the adjusting tank are decomposed and discharged through the UASB anaerobic tank; a water inlet pipeline of the hydrolysis acidification tank is connected with a water drainage pipeline of the UASB anaerobic tank, and part of macromolecular long-chain organic matters are degraded into micromolecular organic matters through the hydrolysis acidification tank, so that the biodegradability of the wastewater is improved; the water inlet pipeline of the DAT aerobic tank is connected with the water discharge pipeline of the hydrolysis acidification tank, and a large amount of organic matters in the sewage can be removed through the DAT tank; the water inlet pipeline of the IAT aerobic tank is connected with the water outlet pipeline of the DAT aerobic tank, organic matters in water can be further removed through the IAT aerobic tank, and ammonia nitrogen in the water is further removed to reach the discharge standard.

4. The high-concentration wastewater treatment system according to claim 3, wherein the deepening treatment system further comprises a first settling tank and a second settling tank; the water inlet pipeline of the first sedimentation tank is connected with the drainage pipeline of the IAT aerobic tank, wastewater discharged from the IAT aerobic tank can be settled through the first sedimentation tank, the first sedimentation tank is respectively connected with the UASB anaerobic tank, the hydrolysis acidification tank, the DAT aerobic tank, the IAT aerobic tank and the second water collecting tank through sludge backflow pipelines, so that sludge generated after settlement is discharged back to the UASB anaerobic tank, the hydrolysis acidification tank, the DAT aerobic tank and the IAT aerobic tank through the sludge backflow pipelines, and redundant sludge is discharged back to the second water collecting tank; a water inlet pipeline of the reaction tank is connected with a water drainage pipeline of the first sedimentation tank, and a second coagulant and a strong oxidant are added into the wastewater discharged from the first sedimentation tank in the reaction tank so as to generate a condensate of the residual organic matters; and the water inlet pipeline of the second sedimentation tank is connected with the water drainage pipeline of the reaction tank, and the second sedimentation tank is used for settling the wastewater discharged from the reaction tank to realize mud-water separation, so that the discharge requirement is met.

5. The high-concentration wastewater treatment system according to claim 4, wherein a sludge return pipe is provided on the second sedimentation tank, and the second sedimentation tank returns sludge to the second collection tank through the sludge return pipe.

6. The high-concentration wastewater treatment system according to claim 4, wherein a wastewater return pipe is further arranged on the UASB anaerobic tank, the other end of the wastewater return pipe is connected with the adjusting tank, wastewater which is not completely treated in the UASB anaerobic tank can be returned to the adjusting tank, and the wastewater is mixed with the wastewater in the adjusting tank and then is input back to the UASB anaerobic tank for treatment again.

7. The high-concentration wastewater treatment system according to claim 2, wherein the first coagulant is a mixture of lime, PAC, and PAM.

8. The high-concentration wastewater treatment system according to claim 1, wherein the second coagulant is a mixture of PAC and PAM.

9. The high-concentration wastewater treatment system according to claim 1, wherein the strong oxidizer is a fenton's reagent or a specialized CODcr degrading agent.

10. The high concentration wastewater treatment system according to claim 4, further comprising an air blower connected to a gas pipeline, the other end of the gas pipeline is connected to the second water collecting tank, the DAT aerobic tank and the IAT aerobic tank, wherein the DAT aerobic tank inputs jet aeration and the IAT aerobic tank inputs blast aeration.

11. The high concentration wastewater treatment system according to claim 4, further comprising a reservoir, wherein the drain pipe of the first settling tank is connected to the inlet pipe of the reservoir, and when the water level in the first settling tank exceeds the drain pipe of the first settling tank, the wastewater in the first settling tank flows into the reservoir by gravity flow; and the drainage pipeline of the reservoir is connected with the water inlet pipeline of the reaction tank.

12. A high-concentration wastewater treatment process is characterized by comprising the following treatment processes:

(1) mixing and discharging sewage into a first water collecting tank, carrying out oil separation treatment on a solvent floating in the first water collecting tank, and outputting the wastewater treated in the first water collecting tank;

(2) inputting the wastewater treated by the first water collecting tank into a second water collecting tank, realizing uniform homogenization in the second water collecting tank, and outputting the wastewater treated by the second water collecting tank;

(3) inputting the wastewater treated by the second water collecting tank into a coagulation reaction tank, wherein an aeration system is arranged at the bottom of the coagulation reaction tank, so that the wastewater treated by the second water collecting tank is uniformly mixed with the residual sludge in the coagulation reaction tank, and a first coagulant is added into the coagulation reaction tank, wherein the first coagulant is a mixture of lime, PAC (polyaluminium chloride) and PAM (polyacrylamide), and the first coagulant reacts with pollutants in the coagulation reaction tank, so that emulsion breaking and coagulation are carried out to obtain large particles, and the wastewater treated by the coagulation reaction tank containing the large particles is output;

(4) and inputting the wastewater treated by the coagulation reaction tank into a plate-and-frame filter press, and performing dehydration reaction by using the plate-and-frame filter press. At the moment, the fibers and the agglomerated mucilage in the wastewater treated by the coagulation reaction tank are intercepted in the plate-and-frame filter press and output to the wastewater treated by the plate-and-frame filter press;

(5) inputting the wastewater treated by the plate-and-frame filter press into a regulating reservoir, realizing uniform homogenization in the regulating reservoir, and outputting the wastewater treated by the regulating reservoir;

(6) inputting the wastewater treated by the regulating tank into a UASB anaerobic tank to perform anaerobic fermentation through a high-load anaerobic pollution bed; in a UASB anaerobic tank, organic matters in the wastewater treated by the regulating tank are decomposed into CH4, CO2 and other gases to be discharged, so that the concentration of the organic matters in the wastewater is effectively reduced, a wastewater backflow pipeline is further arranged between the USAB anaerobic tank and the regulating tank, circular treatment can be realized through the wastewater backflow pipeline, and the UASB anaerobic tank outputs the wastewater treated by the UASB anaerobic tank;

(7) inputting the wastewater treated by the UASB anaerobic tank into a hydrolysis acidification tank, degrading part of macromolecular long-chain organic matters into micromolecular organic matters through the hydrolysis acidification tank, improving the biodegradability of the wastewater, and outputting the wastewater treated by the hydrolysis acidification tank;

(8) inputting the wastewater treated by the hydrolysis acidification tank into a DAT aerobic tank, wherein the treatment process of the aerobic tank adopts a DAT-IAT combined aerobic process, the sewage is efficiently degraded in the DAT aerobic tank, and a large amount of organic matters in the sewage can be removed by the DAT aerobic tank; outputting the wastewater treated by the DAT aerobic tank;

(9) inputting the wastewater treated by the DAT aerobic tank into an IAT aerobic tank, further removing organic matters in the water and further removing ammonia nitrogen in the water under the alternate anoxic-aerobic treatment to meet the discharge requirement; outputting the wastewater treated by the IAT aerobic tank;

(10) inputting the wastewater treated by the IAT aerobic tank into a first sedimentation tank, effectively settling the wastewater discharged from the IAT aerobic tank through the first sedimentation tank, and outputting the wastewater treated by the first sedimentation tank; the IAT aerobic pool waste water carries a large amount of activated sludge, the first sedimentation pool is respectively connected with the UASB anaerobic pool, the hydrolysis acidification pool, the DAT aerobic pool, the IAT aerobic pool and the second water collecting pool through a sludge return pipeline, so that the sludge generated after sedimentation is preferentially discharged back to the UASB anaerobic pool, the hydrolysis acidification pool, the DAT aerobic pool and the IAT aerobic pool through the sludge return pipeline, and if the sludge is redundant, the sludge is discharged back to the second water collecting pool;

(11) inputting the wastewater treated by the first sedimentation tank into a reservoir in a self-inflow mode, and outputting the wastewater treated by the reservoir;

(12) inputting the wastewater treated by the reservoir into a reaction tank, adding a second coagulant and a combined strong oxidant, performing second coagulation to obtain a mixture of PAC and PAM, reacting the second coagulant with undegraded organic matters and suspended matters in the wastewater of the reservoir to generate flocculate, and outputting the wastewater treated by the reaction tank;

(13) and inputting the wastewater treated by the reaction tank into a second sedimentation tank, carrying out mud-water separation in the second sedimentation tank, outputting the treated clean wastewater and discharging.

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