CN114315020A - Be provided with ultrafiltration reverse osmosis system's sewage treatment system - Google Patents

Be provided with ultrafiltration reverse osmosis system's sewage treatment system Download PDF

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Publication number
CN114315020A
CN114315020A CN202111594080.4A CN202111594080A CN114315020A CN 114315020 A CN114315020 A CN 114315020A CN 202111594080 A CN202111594080 A CN 202111594080A CN 114315020 A CN114315020 A CN 114315020A
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China
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treatment system
water
tank
reverse osmosis
sewage treatment
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CN202111594080.4A
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Inventor
刘晓磊
郑锋
南明启
孙立军
徐文凯
李艳程
苏得志
高伟
沈鹏程
王健
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Zhangjiakou Cigarette Factory Co Ltd
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Zhangjiakou Cigarette Factory Co Ltd
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Priority to CN202111594080.4A priority Critical patent/CN114315020A/en
Publication of CN114315020A publication Critical patent/CN114315020A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a sewage treatment system with an ultrafiltration reverse osmosis system, which comprises a primary treatment system, a biochemical treatment system and an advanced treatment system which are arranged in sequence. The sewage treatment system is suitable for tobacco enterprises to treat and recycle production sewage; based on the fact that original sewage treatment equipment in a workshop is formed after innovation and transformation, the whole transformation process follows the principles of saving energy, land and cost, and the existing equipment is recovered and used to the maximum extent; a large amount of tobacco shreds and tobacco stems in the wastewater can be removed by the primary treatment system process; the biochemical treatment system process can degrade COD, BOD and ammonia nitrogen, and ensure that the effluent quality meets the requirement of urban waste water recycling urban miscellaneous water quality; the process effluent of the advanced treatment system 'bag filter + ultrafiltration device + reverse osmosis device' meets sanitary standard for drinking water ', and a small amount of concentrated water produced in engineering meets the quality of urban miscellaneous water for urban sewage recycling'.

Description

Be provided with ultrafiltration reverse osmosis system's sewage treatment system
Technical Field
The invention relates to the field of sewage treatment, in particular to a sewage treatment system with an ultrafiltration reverse osmosis system.
Background
The sewage station of our company is completed and put into use from 2009 to 9 months and has been continuously operated for 11 years, the treatment capacity of each tank body originally designed by the existing wastewater treatment system of the company is 2000t/d, and the treatment capacity is actually operated at present: the water amount is about 500t/d in winter, and the water amount is about 600t/d in summer due to large bathing amount of workers.
Referring to fig. 1, the existing sewage treatment system comprises the following technical processes and operation conditions: factory production wastewater + domestic wastewater-grating/water collecting well-regulating tank-hydrolysis and contact oxidation tank-cavitation air flotation (temporarily not acting as an air flotation machine and used as a sedimentation tank) -middle water tank-multi-medium filter-clean water tank-greening (small part of treated water); most of the treated water is directly discharged from the cavitation air flotation to the municipal pipe network.
The sewage station is limited by the floor area when being built, the equipment room is built on the ground 1 layer and the underground two layers, besides various mechanical equipment, a cavitation air flotation tank, a water collecting well and an intermediate water tank are also built in the equipment room, and the toxic and harmful gas volatilized by each sewage tank increases the poisoning risk of people entering and exiting the equipment room. In addition, the sewage treatment station has the following problems:
1. laggard sewage treatment process
The sewage treatment process is backward, no pretreatment equipment is needed, and the characteristics of the sewage discharge of cigarette production enterprises can not be met. The cigarette enterprise waste water contains a large amount of tobacco shreds and tobacco powder, the existing grid equipment of a sewage station can only intercept large pieces of tobacco leaves, other waste water containing the tobacco shreds and the tobacco powder directly enters a water collecting well through grid gaps, and the waste water is soaked and accumulated in a sewage tank to cause sewage yellowing, COD (chemical oxygen demand) and turbidity indexes are increased for the second time, the treatment burden of a hydrolysis acidification tank and a contact oxidation tank is increased, and in addition, the danger of limited space operation is increased for manual later-stage fishing of the tobacco powder.
The sump pit receives space area's limitation, and personnel clear drawing at every turn of manual work can only be at the well head with spade and strainer, can't thoroughly clearly draw totally. The design capacity of the water collecting well is small, only 17 tons, and the water collecting well is positioned at the negative layer of the equipment room, if the tobacco powder in the pool is not timely cleared, the total capacity of the pool is reduced, and the accident that the sewage overflows and floods the equipment room is easy to occur.
2. Unreasonable sewage treatment process
The cavitation air flotation tank is arranged in front of the hydrolysis acidification tank and the contact oxidation tank in the sewage treatment, so that the effect of reducing sewage suspended matters is achieved, and the low-turbidity sewage is ensured to enter the hydrolysis acidification tank for degradation treatment. The cavitation air flotation tank of our company is arranged at the tail end of a sewage treatment station and is limited by space, the volume of the air flotation tank is small, colloid and micro-suspended matters in wastewater cannot be settled and separated, the treatment effect of an aeration tank and a sedimentation tank cannot be achieved, and the cavitation air flotation tank is currently used as a sedimentation tank.
The existing wastewater system of a company runs for many years, no matter the treatment capacity and the treatment effect can not meet the development requirement, the process and equipment and facilities need to be maintained, perfected and optimized so as to improve the quality of water produced by the system, realize the recycling of water resources, save energy, reduce consumption and realize green production.
Disclosure of Invention
In order to overcome the defects, the application provides a sewage treatment system and a sewage treatment method with an ultrafiltration reverse osmosis system, and the application carries out process and equipment facility optimization based on the existing sewage station, can effectively improve the quality of produced water, and realizes water resource recycling, energy conservation, consumption reduction and green production.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a sewage treatment system with an ultrafiltration reverse osmosis system comprises
The primary treatment system comprises a primary filter device, a grid well, a water collecting well, an adjusting tank and a cavitation air flotation device which are sequentially arranged, wherein a rotary grid decontamination device is installed in the grid well, a filler is filled in the adjusting tank, an aeration device I is installed in the adjusting tank, a coagulant aid and a flocculating agent are filled in the cavitation air flotation device, and an aeration device II and a slag scraping device are installed in the cavitation air flotation device;
the biochemical treatment system comprises a hydrolysis acidification tank, a contact oxidation tank, an MBR tank, an intermediate water tank and a clean water tank which are sequentially arranged, wherein a membrane biological reaction device, an MBR product water pump and an MBR backwashing pump are arranged in the MBR tank, a fine filtering device I is arranged in the intermediate water tank, at least two groups of fine filtering devices I are arranged in parallel, an ozone catalytic oxidation device is arranged at the water outlet of the intermediate water tank, and the water outlet of the clean water tank meets the requirements of urban sewage recycling/urban miscellaneous water quality;
the advanced treatment system comprises a fine filtration device II, an ultrafiltration device, an ultrafiltration water production tank, a reverse osmosis device and a reverse osmosis water production tank which are sequentially arranged, wherein concentrated water of the ultrafiltration device and the reverse osmosis device meets urban sewage recycling/urban miscellaneous water quality, and the outlet water of the reverse osmosis water production tank meets the sanitary standard of drinking water.
As an improvement of the scheme, the primary filtering device is a hydraulic screen, is arranged at a workshop production wastewater collection position and is arranged underground, and is mainly used for intercepting tobacco shreds and tobacco stems in sewage to prevent more suspended matters from entering a grid well; a water outlet of the workshop production wastewater is provided with a leakage net to intercept most of tobacco leaves, tobacco stems and colloid from the source and reduce suspended matters entering a sewage treatment system.
As an improvement of the scheme, the filler in the regulating tank is high-efficiency filler, and the number of the filler is 120m3The aeration device I is a disc aerator or a tubular aerator and is used for carrying out pre-aeration and pre-oxidation treatment on the production wastewater.
As an improvement of the scheme, the adjusting tank is communicated with a cavitation air flotation device (high-efficiency dissolved air flotation) through a lift pump.
As an improvement of the scheme, the aeration device II is a disc aerator or a pipe aerator.
As an improvement of the proposal, the contact oxidation tank is filled with filler and is provided with an aeration device III, the filler is high-efficiency filler, and the quantity is 480m3The aeration device III is a disc type aerator or a pipe type aerator.
As an improvement of the scheme, the effluent of the contact oxidation tank enters the MBR tank through self-flowing, and the MBR tank is communicated with the middle water tank through a lift pump.
As an improvement of the scheme, the MBR tank is connected with a sludge tank, and the sludge tank is connected with a sludge dewatering machine.
As an improvement of the scheme, the membrane bioreactor is a curtain type membrane group device.
As an improvement of the scheme, the fine filtering device I is an activated carbon filter.
As an improvement of the scheme, the ozone catalytic oxidation device is connected with an ozone generator and is used for avoiding the water quality fluctuation of biochemical effluent.
As an improvement of the scheme, the effluent of the intermediate water tank is communicated to an ozone catalytic oxidation device (an ozone catalytic oxidation tower) through a lift pump and is used for further degrading residual COD in the wastewater.
As an improvement of the scheme, the fine filtering device II is a bag filter.
The sewage treatment process of the sewage treatment system comprises the following steps:
the production wastewater of each production workshop is collected and then enters a hydraulic screen, so that a large amount of tobacco shreds and tobacco stems in the wastewater are removed, the insoluble COD in the water is removed, and the load of subsequent water treatment equipment is reduced;
the water from the hydraulic screen enters a grid well, and a rotary grid dirt remover in the grid well further intercepts suspended matters such as fine tobacco shreds and the like in the wastewater;
effluent enters a water collecting well and an adjusting tank through self-flowing, and a filler and an aeration device I in the adjusting tank carry out pre-aeration and pre-oxidation treatment on the wastewater, so that part of soluble COD, BOD and the like are degraded in the treatment structure;
the effluent of the regulating reservoir is conveyed to a cavitation air flotation device through a lifting pump, the addition of a coagulant aid and a flocculating agent can effectively coagulate micro suspended matters in the wastewater, and the coagulated large suspended matters are supported by an aeration system in the water and are scraped under the action of a slag scraper;
the effluent of the cavitation air flotation device enters a whole set of biochemical treatment system which mainly comprises a hydrolysis acidification tank, a contact oxidation tank and an MBR tank arranged underground for degrading COD, BOD and ammonia nitrogen;
an active carbon filter is arranged in the middle water tank to adsorb and remove residual COD in the biochemical effluent; in order to prevent the condition that the quality of the effluent is fluctuated and the quality of the effluent is unqualified accidentally, an ozone catalytic oxidation device is additionally arranged behind an activated carbon filter to further degrade residual COD in the wastewater, so that the effluent quality of a clean water tank meets the requirement of urban waste water recycling urban miscellaneous water quality (GB18920-2002), and meets the urban greening or toilet flushing water standard;
the effluent of the clean water tank enters a whole set of advanced treatment process equipment: the water quality of the advanced treatment effluent meets the sanitary standard for drinking water (GB5749-2006), and the advanced treatment effluent can be used for daily bath or production water; the concentrated water of ultrafiltration and reverse osmosis meets the requirements of the quality of urban miscellaneous water for urban sewage recycling (GB18920-2002) for urban greening.
The invention has the following beneficial effects:
the sewage treatment system is suitable for tobacco enterprises to treat and recycle production sewage;
based on the fact that original sewage treatment equipment in a workshop is formed after innovation and transformation, the whole transformation process follows the principles of saving energy, land and cost, and the existing equipment is recovered and used to the maximum extent;
the primary treatment system process can remove a large amount of tobacco shreds and tobacco stems in the wastewater, improve the pretreatment capacity, and intercept suspended matters without entering a hydrolysis acidification tank;
the biochemical treatment system process can degrade COD, BOD and ammonia nitrogen, the biochemical effluent enters an active carbon filter through a lift pump, and residual COD in the biochemical effluent is absorbed and removed; in order to prevent the fluctuation of the effluent quality, an ozone catalytic oxidation device is additionally arranged behind an activated carbon filter, so that the effluent quality is ensured to meet the requirement of the quality of urban miscellaneous water for urban sewage recycling, and the effluent can be directly used as toilet flushing and greening water;
considering the needs of deep reuse and minimum carbon emission, an advanced treatment system is additionally arranged: a bag filter, an ultrafiltration device and a reverse osmosis device are adopted; a part of produced water of the biochemical system is subjected to advanced treatment, and the effluent treated by the set of process meets the sanitary standard for drinking water (GB5749-2006), and can be used for daily production, washing and rinsing of workshop ground water and industrial water; a small amount of concentrated water generated in the treatment project meets the requirement of 'urban sewage recycling urban miscellaneous water quality' (GB18920-2002), can be used for greening or flushing toilets, realizes water recycling, reduces the consumption of new water, and does not discharge waste water.
Drawings
The invention will be further described with reference to the accompanying drawings and specific embodiments,
FIG. 1 is a schematic diagram of a conventional sewage treatment system;
FIG. 2 is a schematic view of the connection structure of the sewage treatment system.
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.
Example 1
Referring to fig. 2, a sewage treatment system provided with an ultrafiltration reverse osmosis system comprises a primary treatment system, a biochemical treatment system and an advanced treatment system which are arranged in sequence.
The primary treatment system comprises a primary filter device, a grating well, a water collecting well, an adjusting tank and a cavitation air flotation device which are sequentially arranged. The primary filtering device is a hydraulic screen which is arranged at the gathering position of workshop production wastewater and is arranged underground, and the raw water gravity flow is utilized to intercept tobacco shreds and tobacco stems in the sewage so as to prevent more suspended matters from entering the grid well; a water outlet of the production wastewater of each workshop can be provided with a leakage net so as to intercept most of tobacco leaves, tobacco stems and colloid from the source and reduce suspended matters entering a sewage treatment system.
A rotary grating dirt removing machine is arranged in the grating well, and suspended matters such as tiny tobacco shreds and the like in the wastewater are further intercepted; the adjusting tank is filled with filler and is provided with a disc aerator, an air compressor is communicated through an air pressure pipeline, the waste water is subjected to pre-aeration and pre-oxidation treatment, and partial soluble COD, BOD and the like are degraded in the treatment structure; the equalizing basin goes out water and gets into the cavitation air supporting device through the elevator pump, cavitation air supporting device is high-efficient dissolved air supporting, it is filled with coagulant aid and flocculating agent in it, and install aeration equipment II and scrape the sediment device, coagulant aid and flocculating agent's addition can effectively condense little suspended solid in the waste water, aeration equipment II through the aquatic, hold up the large granule suspended solid after condensing, effectively strike off under the effect of scraping the sediment machine, aeration equipment II is tubular aerator, through air pressure pipeline intercommunication air compressor machine.
The air-floated effluent enters a whole set of biochemical treatment system.
The biochemical treatment system comprises a hydrolysis acidification tank, a contact oxidation tank, an MBR tank, an intermediate water tank and a clean water tank which are arranged in sequence, and COD, BOD and ammonia nitrogen are mainly degraded in the biochemical system.
The hydrolysis acidification tank and the contact oxidation tank are used for dredging, replacing the filler and the like before use. The effluent of the contact oxidation pond enters an MBR (membrane bioreactor) pond through self-flowing, the MBR pond is formed by the original 'middle water pond' through waste recovery modification, after the desilting treatment, a curtain type membrane group device is arranged in the pond body, and an MBR water production pump and an MBR backwashing pump are additionally arranged at the same time; the MBR tank is communicated with the middle water tank through a lift pump, and settled sludge in the MBR tank is discharged after passing through the sludge tank and the sludge dewatering machine.
The intermediate water tank, the clean water tank, the ultrafiltration water producing tank and the reverse osmosis water producing tank are all formed by using the original clean water tank and performing desilting and separation.
The middle water tank is internally provided with an activated carbon filter, and two groups of activated carbon filters are arranged in parallel for use so as to meet the treatment requirement of 800 t/d. The effluent of the middle water tank is communicated to an ozone catalytic oxidation tower which is connected with an ozone generator to further degrade residual COD in the wastewater, thereby avoiding the water quality fluctuation of biochemical effluent. The water discharged from the clean water tank meets the requirements of urban sewage recycling/urban miscellaneous water quality, and can be used for urban greening or toilet flushing.
The advanced treatment system comprises a fine filter device II, an ultrafiltration device, an ultrafiltration water producing tank, a reverse osmosis device and a reverse osmosis water producing tank which are arranged in sequence, wherein the fine filter device II is a bag filter.
Concentrated water of the ultrafiltration device and the reverse osmosis device meets the requirements of urban sewage recycling/urban miscellaneous water quality, can be used as urban greening water, and the water discharged from the reverse osmosis water producing pond meets the requirements of sanitary standards for drinking water, and can be used for daily bath or production water.
The core components present in the present embodiment will be specifically described below.
The hydraulic sieve adopts a porous material to intercept suspended matters in liquid and is suitable for removing solid suspended impurities from a low-concentration solution. In this embodiment, can reduce aquatic suspended solid concentration effectively, alleviate the processing load of subsequent handling to play the effect of protection water pump, pipeline and instrument. The hydraulic screen has the following characteristics:
1. the structure is simple: comprises a screen, a screen frame, a water inlet pipe, a water distribution pipe and the like;
2. the treatment efficiency is high: when the device is used for treating the sewage in a workshop, the BOD removal efficiency is approximately equal to the primary precipitation.
The MBR tank is internally provided with an MBR box body, an enhanced curtain type membrane group device, a membrane frame, an MBR water production pump, an MBR backwashing pump, a fan, an aeration pipeline, a water production pipeline and the like, and the MBR system realizes automatic water production, regular backwashing and continuous aeration through a PLC automatic control system, so that the system automatically operates; in the running process of the system, the aeration system is always in an open state; if the aeration system is abnormal, the system is stopped emergently.
Curtain formula membrane material is polyvinylidene fluoride (PVDF), and its advantage lies in:
1. the polyvinylidene fluoride membrane can form a separation membrane with excellent performance due to heat resistance, chemical stability, radiation resistance and good physical and mechanical properties; the separation membrane ensures that macromolecular refractory components in the sewage have enough residence time in the bioreactor, thereby greatly improving the degradation efficiency of the refractory organic matters;
2. the porosity is high, the flux is large, the anti-pollution capability is strong, and after the aeration and backwashing system is matched, the sewage treatment device is not easy to be adhered by pollutants, is easy to clean and is suitable for sewage treatment of a smoke factory;
3. the production process of lining the inner supporting layer is adopted, the breaking strength of membrane filaments is more than 150N, and the service life of the membrane is as long as 3-5 years;
4. the separation process is that under the action of fluid pressure difference, the size selectivity of the membrane to the separated components is utilized to intercept the particles and macromolecular solutes which can be intercepted by the membrane pores, and the particles or the micromolecular solutes which can not be intercepted by the membrane pores permeate the membrane, so that the phase change does not occur in the separation process, and the energy consumption is low;
5. the quality of the effluent is good, the content and turbidity of suspended matters in the effluent are low, and the effluent can be directly recycled;
enhanced curtain film assembly performance profile:
the ozone catalytic oxidation tower mainly comprises an ozone generator, a tail gas destructor and an ozone catalytic oxidation filler which are connected with the ozone generator, and is mainly used for disinfecting water, removing pollutants such as phenol, cyanogen and the like in the water, decoloring the water, removing metal ions such as iron, manganese and the like in the water, and removing peculiar smell, odor and the like. The metal-loaded active carbon catalyst is a compound formed by mixing micro-crystalline and non-crystalline parts, the surface of the catalyst contains a large amount of acidic or basic groups, in the process of ozone/catalyst synergism, ozone is decomposed under the action of the catalyst to generate [. OH ] so as to initiate chain reaction, the reaction can also generate monatomic oxygen [. O ] which is very active and has strong oxidizing capability, and most of organic compounds (including some high-stability and difficultly-degradable organic compounds) can be rapidly oxidized and decomposed.
The sewage treatment project of the embodiment has large water quantity, neutral water quality and limited field, and the ozone catalytic oxidation process has the following advantages:
1. the oxidizing ability to organic pollutants is strong, and the organic matter removing ability is strong;
2. the participation of the catalyst greatly reduces the oxidation selectivity;
3. the organic matter is finally decomposed into CO2 and H2O, and no toxic and harmful intermediate products are generated, so that the method is safe and environment-friendly;
4. the pH value of the sewage does not need to be adjusted;
5. the ozone generator generates ozone by using electric energy and air, has no chemical agent, and is safe and sanitary on site;
6. the oxidation reaction time is short, generally controlled to be about 30min, and the volume of the reactor is small.
The fine filtering device II is a bag filter and mainly comprises a filtering cylinder body, a filtering cylinder cover, a quick opening mechanism, a stainless steel filtering bag, a reinforcing net and the like; in the embodiment, the structure of the bag filter is that the cylinder cover and the filtering cylinder are sealed and locked by four sets of rocking hammer type ring head bolts, so that the filter can bear extremely high filtering pressure and water hammer type pressure impact, liquid to be filtered enters through an inlet of the filter, flows into a filtering bag and flows out through an outlet after being intercepted by the filtering bag; the inlet and outlet of the bag filter are designed in a side-in bottom-out mode generally, so that the bag filter is convenient to clean.
In the embodiment, the bag filter is designed to prevent filter material powder carried in ozone catalytic oxidation effluent from blocking subsequent ultrafiltration and reverse osmosis equipment and protect subsequent treatment equipment.
The ultrafiltration device mainly comprises an ultrafiltration column type membrane component, an ultrafiltration membrane frame, an ultrafiltration backwashing pump, a gas washing system, a monitoring control instrument (a pressure gauge and a flowmeter) required by a process system and the like.
In this embodiment, the ultrafiltration device is the most important purification device in the system, and removes most suspended solids, colloids, organic matters and microorganisms in water by using the characteristics of the ultrafiltration membrane, thereby performing the function of clarification and filtration. The qualified wastewater after pretreatment enters a membrane module, water and a very small amount of small molecular weight organic matters pass through the membrane layer, are concentrated by a collecting pipeline and then are led to a water production pipe and then are injected into a water production pool; otherwise, the water which cannot pass through the water collecting pipe is collected by another group of collecting pipes and then is led to a concentrated water discharge pipe to be injected into a drainage ditch. A series of control valves, monitoring instruments and program-controlled operating systems are arranged on water inlet, water production and concentrated water pipelines of the system so as to ensure the long-term quality guarantee and quantity guarantee of the equipment for systematic operation.
The reverse osmosis device mainly comprises an inlet reverse osmosis membrane component, a reverse osmosis membrane frame, a dosing system, a high-pressure pump, a monitoring control instrument (a pressure gauge and a flow meter) and the like, wherein the reverse osmosis membrane is provided with a highly selective permeability, the reverse osmosis principle is utilized, the inorganic salt removal rate in water reaches 99%, various organic matters and particles in water can be removed, the product cleaning qualification rate is greatly improved, no pollution is caused, and the device is widely applied to the deep treatment process.
Example 2
The sewage treatment process of the sewage treatment system in example 1:
the production wastewater of each production workshop is collected and then enters a hydraulic screen, so that a large amount of tobacco shreds and tobacco stems in the wastewater are removed, the insoluble COD in the water is removed, and the load of subsequent water treatment equipment is reduced;
the water from the hydraulic screen enters a grid well, and a rotary grid dirt remover in the grid well further intercepts suspended matters such as fine tobacco shreds and the like in the wastewater;
effluent enters a water collecting well and an adjusting tank through self-flowing, and a filler and an aeration device I in the adjusting tank carry out pre-aeration and pre-oxidation treatment on the wastewater, so that part of soluble COD, BOD and the like are degraded in the treatment structure;
the effluent of the regulating reservoir passes through a lift pump to a cavitation air flotation device, coagulant aids and flocculating agents are added through a dosing system (a medicine box, a stirrer and a dosing pump), micro suspended matters in the wastewater are effectively coagulated, and the coagulated large suspended matters are supported by a tubular aerator in the water and are scraped under the action of a slag scraper;
the effluent of the cavitation air flotation device enters a whole set of biochemical treatment system which mainly comprises a hydrolysis acidification tank, a contact oxidation tank and an MBR tank arranged underground for degrading COD, BOD and ammonia nitrogen;
an active carbon filter is arranged in the middle water tank to adsorb and remove residual COD in the biochemical effluent; in order to prevent the condition that the quality of the effluent is fluctuated and the quality of the effluent is unqualified accidentally, an ozone catalytic oxidation device is additionally arranged behind an activated carbon filter to further degrade residual COD in the wastewater, so that the effluent quality of a clean water tank meets the requirement of urban waste water recycling urban miscellaneous water quality (GB18920-2002), and meets the urban greening or toilet flushing water standard;
the effluent of the clean water tank enters a whole set of advanced treatment process equipment: the water quality of the advanced treatment effluent meets the sanitary standard for drinking water (GB5749-2006), and the advanced treatment effluent can be used for daily bath or production water; the concentrated water of ultrafiltration and reverse osmosis meets the requirements of the quality of urban miscellaneous water for urban sewage recycling (GB18920-2002) for urban greening.
Example 3
The sewage treatment system of example 1 was applied with the water amount balance table and the removal rate estimation table after the implementation.
It should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (9)

1. The utility model provides a be provided with ultrafiltration reverse osmosis system's sewage treatment system which characterized in that: comprises that
The primary treatment system comprises a primary filter device, a grid well, a water collecting well, an adjusting tank and a cavitation air flotation device which are sequentially arranged, wherein a rotary grid decontamination device is installed in the grid well, a filler is filled in the adjusting tank, an aeration device I is installed in the adjusting tank, a coagulant aid and a flocculating agent are filled in the cavitation air flotation device, and an aeration device II and a slag scraping device are installed in the cavitation air flotation device;
the biochemical treatment system comprises a hydrolysis acidification tank, a contact oxidation tank, an MBR tank, an intermediate water tank and a clean water tank which are sequentially arranged, wherein a membrane biological reaction device, an MBR product water pump and an MBR backwashing pump are arranged in the MBR tank, a fine filter device I is arranged in the intermediate water tank, at least two groups of fine filter devices I are arranged in parallel, and an ozone catalytic oxidation device is arranged at the water outlet position of the intermediate water tank;
the advanced treatment system comprises a fine filtration device II, an ultrafiltration device, an ultrafiltration water production tank, a reverse osmosis device and a reverse osmosis water production tank which are arranged in sequence.
2. The sewage treatment system provided with an ultrafiltration reverse osmosis system according to claim 1, wherein:
the primary filtering device is a hydraulic screen which is arranged at the position where the workshop production wastewater is collected and is arranged underground.
3. The sewage treatment system provided with an ultrafiltration reverse osmosis system according to claim 1, wherein:
and the aeration device I in the regulating reservoir is a disc aerator or a tubular aerator and is used for carrying out pre-aeration and pre-oxidation treatment on the production wastewater.
4. The sewage treatment system provided with an ultrafiltration reverse osmosis system according to claim 1, wherein:
the adjusting tank is communicated with the cavitation air flotation device through a lift pump.
5. The sewage treatment system provided with an ultrafiltration reverse osmosis system according to claim 1, wherein:
the contact oxidation pond is filled with filler and is provided with an aeration device III, and the aeration device III is a disc type aerator or a tubular type aerator.
6. The sewage treatment system provided with an ultrafiltration reverse osmosis system according to claim 1, wherein:
the effluent of the contact oxidation pond enters the MBR pond through self-flowing, and the MBR pond is communicated with the middle water pond through a lift pump.
7. The sewage treatment system provided with an ultrafiltration reverse osmosis system according to claim 1, wherein:
the fine filtering device I is an activated carbon filter.
8. The sewage treatment system provided with an ultrafiltration reverse osmosis system according to claim 1, wherein:
the effluent of the intermediate water tank is communicated to an ozone catalytic oxidation device through a lift pump and is used for further degrading residual COD in the wastewater.
9. The sewage treatment system provided with an ultrafiltration reverse osmosis system according to claim 1, wherein:
the fine filtering device II is a bag filter.
CN202111594080.4A 2021-12-23 2021-12-23 Be provided with ultrafiltration reverse osmosis system's sewage treatment system Pending CN114315020A (en)

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