CN111646631A - Beet sugar wastewater treatment system and treatment process - Google Patents
Beet sugar wastewater treatment system and treatment process Download PDFInfo
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- CN111646631A CN111646631A CN202010371090.0A CN202010371090A CN111646631A CN 111646631 A CN111646631 A CN 111646631A CN 202010371090 A CN202010371090 A CN 202010371090A CN 111646631 A CN111646631 A CN 111646631A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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Abstract
The invention relates to the field of beet sugar wastewater treatment engineering, in particular to a beet sugar wastewater treatment system and a treatment process, which comprises a control module, a pretreatment device, a silt treatment device, an anaerobic reactor and an activated sludge tank which are sequentially communicated, wherein the pretreatment device is used for removing floaters in beet sugar wastewater; a heat exchange adjusting device is arranged between the silt treatment device and the anaerobic reactor and is used for adjusting the temperature and the acid-base activity value of the fluid output by the silt treatment device; the control module is used for monitoring and controlling the operation of the beet sugar wastewater treatment system. The invention has the beneficial effects that: through setting up preprocessing device and heat transfer adjusting device, before getting into effluent disposal system, carry out the separation processing that desilts and remove the suspended solid, guarantee the high-efficient operation of a whole set of effluent disposal technology, improved the treatment effeciency of subsequent biochemical technology section simultaneously.
Description
Technical Field
The invention relates to the field of beet sugar wastewater treatment engineering, in particular to a beet sugar wastewater treatment system and a treatment process.
Background
The beet sugar production wastewater is mainly washing flowing water for washing beet, so the wastewater contains a large amount of weeds, silt and the like, and also contains more suspended substances such as waste meal, tail roots and impurities such as kraft paper and the like when beet seedlings are planted, the concentration of suspended substances is higher, and most of suspended substances are removed by pretreatment to reduce the subsequent treatment load.
Beet sugar is a seasonal production product, and the production period is the first and fourth seasons with cold weather every year, so that the wastewater is only discharged for 4-5 months every year. Along with the gradual reduction of the quality of the beet, the flow rate of washing water and the concentration of pollutants can gradually increase from low to high, meanwhile, the loss of sugar is more, so the pollution load in the wastewater is higher, if the pretreatment of sludge removal and suspended matter removal is not carried out, the high-efficiency operation of the whole wastewater treatment process cannot be ensured, the investment construction cost and the operation cost of the structure are increased, and the treatment efficiency of the subsequent biochemical process section is influenced.
Disclosure of Invention
The invention aims to provide a beet sugar wastewater treatment system and a treatment process, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a beet sugar wastewater treatment system comprises a control module, a pretreatment device, a silt treatment device, an anaerobic reactor and an activated sludge tank which are sequentially communicated, wherein the pretreatment device is used for removing floaters in beet sugar wastewater; a heat exchange adjusting device is arranged between the silt treatment device and the anaerobic reactor and is used for adjusting the temperature and the acid-base activity value of the fluid output by the silt treatment device; the control module is used for monitoring and controlling the operation of the beet sugar wastewater treatment system.
As a further scheme of the invention: the pretreatment device comprises a grid chamber and an advection grit chamber, wherein a coarse grid and a fine grid are arranged in the grid chamber, and wastewater is advected to the advection grit chamber after being separated by the coarse grid and the fine grid; and a heavy chain sand removing machine is installed in the advection sand settling tank.
As a still further scheme of the invention: the silt treatment device comprises an auxiliary flow grit chamber, a sludge concentration tank and a plate-and-frame filter press, wherein the sludge concentration tank is communicated with the auxiliary flow grit chamber and the plate-and-frame filter press.
As a still further scheme of the invention: the heat exchange adjusting device comprises an adjusting tank, a water distribution well and a heat exchanger, wherein the adjusting tank is communicated with the water distribution well, the heat exchanger is arranged on the adjusting tank, and water with the pH value adjusted by heating in the water distribution well is pressed to the anaerobic reactor through a water pump.
As a still further scheme of the invention: and a water seal device for separating vapor and water is arranged on the anaerobic reactor.
As a still further scheme of the invention: and a secondary sedimentation tank is connected behind the activated sludge tank.
As a still further scheme of the invention: still include the clear water recovery pond, the clear water recovery pond is connected assist and flows the grit chamber.
As a still further scheme of the invention: a submersible stirrer is arranged in the regulating tank; and/or a pH meter is arranged in the water distribution well.
As a still further scheme of the invention: and the water outlet flow channel of the anaerobic reactor is connected with the mud-water separator and is used for intercepting anaerobic particles to the water distribution well.
The invention provides another technical scheme that: a beet sugar wastewater treatment process adopts the beet sugar wastewater treatment system, and comprises the following steps:
s1, filtering: removing floating substances from the beet sugar wastewater by a pretreatment device to obtain primary treated water;
s2, removing suspended matters and silt: separating suspended matters and silt in the primary treated water by the primary treated water through a silt treatment device to obtain secondary treated water;
s3, temperature regulation and tempering: the second-stage treated water passes through a heat exchange adjusting device, the water temperature is adjusted to 32-38 ℃, and the pH value is adjusted to 6-8, so that third-stage treated water is obtained;
s4, reaction and impurity removal: the third-stage treated water passes through an anaerobic reactor, and is degraded and converted by anaerobic active strains to obtain fourth-stage treated water;
s5, degrading and desliming again: the four-stage treated water flows into an activated sludge tank, and is further degraded by using aerobic active strains to reach the discharge standard.
Compared with the prior art, the invention has the beneficial effects that: through setting up preprocessing device and heat transfer adjusting device, before getting into effluent disposal system, carry out the separation processing that desilts and remove the suspended solid, guarantee the high-efficient operation of a whole set of effluent disposal technology, improved the treatment effeciency of subsequent biochemical technology section simultaneously.
Drawings
FIG. 1 is a schematic view showing the structure of a grille in a beet sugar wastewater treatment system.
FIG. 2 is a schematic structural diagram of a pretreatment device in a beet sugar wastewater treatment system.
FIG. 3 is a schematic view of a part of the structure of a silt treatment device in a beet sugar wastewater treatment system.
FIG. 4 is a schematic view of a part of a sugar beet wastewater treatment system.
FIG. 5 is a schematic structural diagram of a secondary sedimentation tank in a beet sugar wastewater treatment system.
FIG. 6 is a schematic diagram of a beet sugar wastewater treatment system.
In the drawings: 1-grid room, 2-advection grit chamber, 3-auxiliary flow grit chamber, 4-sludge concentration tank, 5-sludge storage tank, 6-plate and frame filter press machine room, 7-adjusting tank, 8-distributing well, 9-SRIC anaerobic reactor, 10-activated sludge tank, 11-secondary sedimentation tank;
12-a submersible mixer, 13-a clear water recovery tank, 14-a water seal device, 15-a blower room, 16-beet sugar waste water, 17-a tap water pipe, 18-a waste water reuse production facility, 19-a sludge outward transportation facility, 20-a mud-water separator, 21-a heat exchange room, 22-a plant area heating pipe, 23-an anaerobic water outlet channel, 24-a torch, 25-a waste water standard discharge channel, 26-a sludge reflux pump, 27-an anaerobic reactor reflux pump, 28-an air blower, 29-a plate and frame filter press, 30-a screw pump, 31-a heavy chain slag remover, 32-a coarse grid and 33-a fine grid;
34-liquid level in-situ display instrument, 35-liquid level information transmission instrument, 36-pH value in-situ display instrument, 37-pH value information transmission instrument, 38-temperature in-situ display instrument, 39-temperature information transmission instrument, 40-flow in-situ display instrument, 41-flow information transmission instrument, 42-dissolved oxygen in-situ display instrument, 43-dissolved oxygen information transmission instrument;
44-a wastewater pipeline, 45-a sludge pipeline, 46-an aeration pipeline, 47-a heating pipeline and 48-a methane pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, in an embodiment of the present invention, a beet sugar wastewater treatment system includes a control module, a pretreatment device, a silt treatment device, an anaerobic reactor, and an activated sludge tank 10, which are sequentially connected, wherein the pretreatment device is used for removing floating materials from beet sugar wastewater; a heat exchange adjusting device is arranged between the silt treatment device and the anaerobic reactor and is used for adjusting the temperature and the acid-base activity value of the fluid output by the silt treatment device; the control module is used for monitoring and controlling the operation of the beet sugar wastewater treatment system.
Specifically, the anaerobic reactor is an SRIC anaerobic reactor 9. The beet sugar wastewater 16 flows into the pretreatment device through a wastewater pipeline 44, and the pretreatment device removes impurities such as waste meal, tail roots and kraft paper when planting beet seedlings in the beet sugar wastewater 16; then, the pretreated beet sugar wastewater 16 flows into a silt treatment device for separating clear water and silt, and the separated clear water is recycled for production; and sent to the production site by waste water to be reused in the production facility 18. The separated mud and sand are compressed and sent to a sludge outward transport facility 19 for retreatment, the separated mixed fluid is pumped into a heat exchange room 21 arranged on a heat exchange adjusting device for temperature adjustment, is connected into a tap water pipe 17 for acid-base activity value adjustment, then flows into an SRIC anaerobic reactor 9 for anaerobic biochemical reaction, and flows into an activated sludge tank 10 through an anaerobic water outlet channel 23 for aerobic biochemical reaction. The control module monitors, regulates and controls the entire operating process of the beet sugar wastewater 16 treatment. In SRIC anaerobic reactor 9: utilize the deep degradation of anaerobism active bacterial, degrade organic matter in the fluid mixture and convert methane and water into, get rid of most organic matter in the fluid mixture after, the gravity flow gets into activated sludge pond 10, in activated sludge pond 10: the aerobic active strains are further degraded to degrade pollutants in the mixed fluid into carbon dioxide and water, most of organic matters remained in the mixed fluid are removed, and the pollution of the mixed fluid is eliminated.
Referring to fig. 1 and 2, in the embodiment of the present invention, the pretreatment apparatus includes a grid room 1 and a horizontal flow grit chamber 2, a coarse grid 32 and a fine grid 33 are disposed in the grid room 1, and wastewater is separated by the coarse grid 32 and the fine grid 33 and then flows horizontally to the horizontal flow grit chamber 2; and a heavy chain sand remover 31 is arranged in the advection grit chamber 2.
A slag scraper is arranged on the advection grit chamber 2 and is used for removing suspended matters;
specifically, set up impurity such as kraft paper when coarse grid 32, fine grid 33 waste meal, tail root and planting beet seedling in to beet sugar waste water 16 and clear away, later, flow into advection grit chamber 2 in, the sediment machine of scraping on 2 upper portions of advection grit chamber is got rid of the suspended solid, the supporting belt, band conveyer that has of heavy chain degritting machine 31 of 2 bottoms of advection grit chamber, the operation of heavy chain degritting machine 31 is sent the silt particle to the belt, and band conveyer synchronous operation, and then send the silt particle to exterior body and handle. The slag scraper is matched with a slag collecting groove and is used for carrying out concentrated draining retreatment on suspended matters.
Wherein, the coarse grating 32 is selected from an XHZ-1200 multiplied by 2.0 model, the gap of the grating bars is 10mm, the slag discharge height is 800mm, and the sizes of the grating channels are all 1.2m multiplied by 2.0m (H); the fine grating 33 is XGZ-1200 multiplied by 1.5, the gap between grating bars is 3mm, the slag discharge height is 800mm, and the size of each grating canal is 2, namely 1.2m multiplied by 1.5m (H); the heavy chain sand remover 31 is ZKC-800 in model, 4.2 in model of PZT for a slag scraper, and 80-12 in model of DSJ for a belt conveyor. The conveying inclination angle is 25 degrees.
Referring to fig. 3, in the embodiment of the present invention, the silt treatment apparatus includes an auxiliary flow grit chamber 3, a silt thickener 4 and a plate-and-frame filter press 29, and the silt thickener connects the auxiliary flow grit chamber 3 and the plate-and-frame filter press 29.
Specifically, the pretreated beet sugar wastewater 16 is precipitated in the auxiliary flow grit chamber 3, the clear water at the upper layer is recovered, and the mud-water mixture at the bottom is lifted to a mud concentration tank 4 by a pump for concentration; then, filter pressing and dehydration are carried out by a plate-and-frame filter press 29 to form mud cakes, and nontoxic and harmless treatment is carried out. The supernatant and the filtrate flow into a heat exchange adjusting device. A plate and frame filter press room 6 is provided for placing a plate and frame filter press 29.
Preferably, a sludge storage tank 5 is arranged between the sludge concentration tank 4 and the plate-and-frame filter press 29, a screw pump 30 is arranged in the sludge storage tank 5, and a water outlet pipe of the screw pump 30 is connected with the plate-and-frame filter press 29. The screw pump 30 pumps the thick mud in the mud storage pool 5 to the plate-and-frame filter press 29, and the thick mud is subjected to filter pressing and dehydration by the plate-and-frame filter press 29 to form mud cakes for non-toxic and harmless treatment.
Referring to fig. 3 and 4, in the embodiment of the present invention, the heat exchange adjusting device includes an adjusting tank 7, a distribution well 8 and a heat exchanger, the adjusting tank is connected to the distribution well, the heat exchanger is installed on the adjusting tank 7, and water heated and adjusted in ph value in the distribution well is pumped to the anaerobic reactor by a water pump. A submersible mixer 12 is arranged in the adjusting tank 7; and/or a pH meter 36 is arranged in the water distribution well 8.
Specifically, the heat exchanger is a floating head type tube bundle heat exchanger 21, the type is BIU-0.8-80-2, and the number is 2; the sewage in the adjusting tank 7 can also be heated in a combined manner by using external condensed water or a plant heating pipe 22 through a heating pipeline 47, the temperature of the condensed water is about 40-45 ℃, and the submersible mixer 12 is arranged in the adjusting tank 7, so that the full equalization of the quality and the quantity of the beet sugar wastewater is ensured, and the transmission rate of the temperature of the wastewater is also ensured. The regulating tank 7 is provided with a temperature local display instrument 38, a temperature information transmission device 39, a liquid level local display instrument 34, a liquid level information transmission device 35, a pH meter 36 and a pH value information transmission device 37, so that the temperature, the liquid level and the pH value in the regulating tank 7 can be observed in real time and transmitted to the control module in real time. The pH value of the waste water in the distributing well 8 is adjusted by a dosing device to be kept at about 7. The outlet pipe of the lift pump of the distribution well 8 is provided with a flow on-site display instrument 40 and a flow information transmission facility 41, and the flow information is transmitted to the control module in real time, so that the inlet flow of the anaerobic reactor 9 can be displayed, the flow is adjusted through a valve, and the stability of the inlet flow of the anaerobic reactor 9 is ensured.
Referring to fig. 4 and 6, in the embodiment of the present invention, a water seal 14 for separating steam and water is disposed on the anaerobic reactor.
Specifically, the gas outlet of the biogas pipe 48 connected with the water seal device 14 is connected with a torch 24, and the biogas generated by the anaerobic reactor is combusted to be carbon dioxide and water, so that harmless discharge is realized.
Referring to fig. 5, in the embodiment of the present invention, a secondary sedimentation tank 11 is connected to the rear of the activated sludge tank 10 for sludge-water separation.
Specifically, the activated sludge tank 10 is communicated with an anaerobic water outlet channel 23 of the anaerobic reactor; a dissolved oxygen on-site display instrument 42 and a dissolved oxygen information transmission facility 43 are arranged in the activated sludge tank; the method is used for detecting and controlling the operating efficiency of the activated sludge tank. The activated sludge tank 10 adopts an air blower 28 aeration mode, the air blower 28 is arranged in an air blower room 15, a micropore aeration disc is arranged at the bottom of the tank and communicated with an aeration pipeline 46, the dissolved oxygen rate of the wastewater is about 25 percent, aerobic microorganisms can be ensured to be in a relatively active state, aerobic decomposition is better carried out, so that organic pollutants in the beet sugar wastewater are degraded, and the beet sugar wastewater can be discharged up to the standard; the secondary sedimentation tank 11 selects a vertical flow sedimentation tank, a sludge return pump 26 is arranged on a sludge discharge pipeline of the secondary sedimentation tank 11 for preventing the loss of aerobic sludge, part of sludge flows back to the activated sludge tank, an online flowmeter is arranged on the sludge return pipeline, the sludge return quantity is monitored in real time and is transmitted to a control module in real time, the sludge return quantity is ensured to be in a certain range, and the normal operation of the activated sludge tank is ensured. In the secondary sedimentation tank, the sludge and water are separated by using the gravity action, one part of supernatant liquid flows back for production, and the other part of supernatant liquid reaches the standard and is discharged from the wastewater discharge passage 25 reaching the standard. The secondary sedimentation tank 11 is also connected with a sludge storage tank through a sludge return pump 26 for further sedimentation.
Referring to fig. 3, in the embodiment of the present invention, the system further includes a clean water recovery tank 13, and the clean water recovery tank 13 is connected to the auxiliary flow grit chamber 3.
Specifically, the supernatant precipitated at the upper layer in the auxiliary flow grit chamber 3 is sent to a clear water recovery tank 13 for production, and the clear water recovery tank 13 can be further connected with an adjusting tank 7 for supplementing clear water required by the adjusting tank 7 for adjusting the pH value. The upper clear water precipitated in the secondary sedimentation tank 11 can also be recycled to the clear water recycling tank 13.
Referring to fig. 4, in the embodiment of the present invention, the effluent channel of the anaerobic reactor is connected to a mud-water separator for intercepting anaerobic particles to the distribution well.
Specifically, the anaerobic water outlet channel 23 of the anaerobic reactor is connected with the mud-water separator 20 and is used for intercepting anaerobic granular sludge to flow back to the water distribution well and supplementing granular sludge in the anaerobic reactor, and the water outlet pipeline is provided with a pH value on-site and remote control instrument which can observe the pH value of wastewater in the anaerobic reactor in real time and transmit the pH value to the control module in real time, so that whether the anaerobic reaction is normal or not can be known through real-time monitoring of the pH value in the anaerobic reactor tank.
Preferably, the anaerobic reactor realizes external reflux of the anaerobic reactor through an anaerobic reactor reflux pump 27, an online flowmeter is arranged on a reflux pipeline, reflux flow is continuously monitored and recorded and is transmitted to a control module in real time, the reflux flow is ensured to be within a certain range, the anaerobic reactor is ensured to have great impact load resistance, and the quality stability of anaerobic effluent can be ensured by adjusting the reflux flow even when the concentration of discharged wastewater is higher than the average design concentration.
In another embodiment of the present invention, a beet sugar wastewater treatment process, which employs the beet sugar wastewater treatment system as described above, includes the following steps:
s1, filtering: removing floating substances from the beet sugar wastewater by a pretreatment device to obtain primary treated water;
s2, removing suspended matters and silt: separating suspended matters and silt in the primary treated water by the primary treated water through a silt treatment device to obtain secondary treated water;
s3, temperature regulation and tempering: the second-stage treated water passes through a heat exchange adjusting device, the water temperature is adjusted to 32-38 ℃, and the pH value is adjusted to 6-8, so that third-stage treated water is obtained;
s4, reaction and impurity removal: the third-stage treated water passes through an anaerobic reactor, and is degraded and converted by anaerobic active strains to obtain fourth-stage treated water;
s5, degrading and desliming again: the four-stage treated water flows into an activated sludge tank, and is further degraded by using aerobic active strains to reach the discharge standard.
Specifically, in step S1, the coarse grid 32 is selected from XHZ-1200 × 2.0 type, the grid gap is 10mm, the slag discharge height is 800mm, and the grid channels are 2, and the size is 1.2m × 2.0m (h); the fine grating 33 is XGZ-1200 multiplied by 1.5, the gap between grating bars is 3mm, the slag discharge height is 800mm, and the size of each grating canal is 2, namely 1.2m multiplied by 1.5m (H); in step S2, the advection grit chamber 2 is selected from 2 sets of heavy chain slag removers 31 with models of ZKC-800, the slag scrapers are selected from 4.2 PZT, and the belt conveyor is selected from DSJ 80-12. The conveying inclination angle is 25 degrees.
In the step S2, the silt treatment device comprises a radial flow type silt basin 4, a silt concentration basin 5 and a plate-and-frame filter press which are sequentially communicated, secondary treatment water is treated by the radial flow type silt basin 4, before flowing into the silt concentration basin, the water inflow is designed to be 850mm3/h, the CODCr is less than or equal to 3000mg/L, the BOD5 is less than or equal to 1000mg/L, the SS is less than or equal to 6500mg/L, the pH value is 6-9, and the water temperature is 15-20 ℃; after the sludge concentration tank 5, the water inflow is designed to be 250mm3/h, CODCr is less than or equal to 2500mg/L, BOD5 is less than or equal to 800mg/L, SS is less than or equal to 450mg/L, the pH value is 5.5-9, and the water temperature is 15-20 ℃.
In step S5, the discharge standard of the water quality is: CODCr is less than or equal to 80mg/L, BOD5 is less than or equal to 20mg/L, SS is less than or equal to 70mg/L, and pH value is 6-9.
The specific working process of the invention is as follows: the pretreatment device removes impurities such as waste meal, tail roots and kraft paper when beet seedlings are planted in the beet sugar wastewater 16;
the pretreated beet sugar wastewater 16 flows into a silt treatment device for separating clear water and silt;
the separated mixed fluid is pumped into a heat exchange regulating device to regulate the temperature and the acid-base activity value, and then flows into an SRIC anaerobic reactor 9 and an activated sludge tank 10 to carry out biochemical reaction.
In SRIC anaerobic reactor 9: degrading organic matters in the mixed fluid into methane and water by utilizing the deep degradation effect of anaerobic active bacteria, automatically flowing into an active sludge tank after removing most organic matters in the mixed fluid,
in the activated sludge tank: and further degrading by using aerobic active strains to degrade pollutants in the mixed fluid into carbon dioxide and water. Discharging after reaching the standard.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The beet sugar wastewater treatment system is characterized by comprising a control module, a pretreatment device, a silt treatment device, an anaerobic reactor and an activated sludge tank which are sequentially communicated, wherein the pretreatment device is used for removing floaters in beet sugar wastewater; a heat exchange adjusting device is arranged between the silt treatment device and the anaerobic reactor and is used for adjusting the temperature and the acid-base activity value of the fluid output by the silt treatment device; the control module is used for monitoring and controlling the operation of the beet sugar wastewater treatment system.
2. The sugar beet wastewater treatment system according to claim 1, wherein the pretreatment device comprises a grid chamber and an advection grit chamber, wherein a coarse grid and a fine grid are arranged in the grid chamber, and wastewater is advected to the advection grit chamber after being separated by the coarse grid and the fine grid; and a heavy chain sand removing machine is installed in the advection sand settling tank.
3. The sugar beet wastewater treatment system according to claim 1, wherein the sludge treatment device comprises an auxiliary flow grit chamber, a sludge concentration chamber and a plate-and-frame filter press, and the sludge concentration chamber is communicated with the auxiliary flow grit chamber and the plate-and-frame filter press.
4. The beet sugar wastewater treatment system according to any one of claims 1 to 3, wherein the heat exchange regulating device comprises a regulating reservoir, a distribution well and a heat exchanger, the regulating reservoir is communicated with the distribution well, the heat exchanger is installed on the regulating reservoir, and water heated and regulated in pH value in the distribution well is pumped to the anaerobic reactor by a water pump.
5. The beet sugar wastewater treatment system according to claim 1, wherein the anaerobic reactor is provided with a water seal for separating steam and water.
6. The beet sugar wastewater treatment system as claimed in claim 1, wherein the activated sludge tank is followed by a secondary sedimentation tank.
7. The sugar beet wastewater treatment system according to claim 3, further comprising a clear water recovery tank, wherein the clear water recovery tank is connected to the secondary flow grit chamber.
8. The sugar beet wastewater treatment system according to claim 4, wherein a submersible mixer is arranged in the regulating reservoir; and/or a pH meter is arranged in the water distribution well.
9. The beet sugar wastewater treatment system as claimed in claim 4, wherein the effluent flow channel of the anaerobic reactor is connected to a mud-water separator for intercepting anaerobic particles to the distribution well.
10. A process for treating beet sugar wastewater, which is characterized in that the beet sugar wastewater treatment system as claimed in any one of claims 1 to 9 is adopted, and comprises the following steps:
s1, filtering: removing floating substances from the beet sugar wastewater by a pretreatment device to obtain primary treated water;
s2, removing suspended matters and silt: separating suspended matters and silt in the primary treated water by the primary treated water through a silt treatment device to obtain secondary treated water;
s3, temperature regulation and tempering: the second-stage treated water passes through a heat exchange adjusting device, the water temperature is adjusted to 32-38 ℃, and the pH value is adjusted to 6-8, so that third-stage treated water is obtained;
s4, reaction and impurity removal: the third-stage treated water passes through an anaerobic reactor, and is degraded and converted by anaerobic active strains to obtain fourth-stage treated water;
s5, degrading and desliming again: the four-stage treated water flows into an activated sludge tank, and is further degraded by using aerobic active strains to reach the discharge standard.
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