CN109574389A - A kind of recovery method of oil-containing stainless steel waste water - Google Patents
A kind of recovery method of oil-containing stainless steel waste water Download PDFInfo
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- CN109574389A CN109574389A CN201811543995.0A CN201811543995A CN109574389A CN 109574389 A CN109574389 A CN 109574389A CN 201811543995 A CN201811543995 A CN 201811543995A CN 109574389 A CN109574389 A CN 109574389A
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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
- C02F1/02—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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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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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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of recovery methods of oil-containing stainless steel waste water, it is cooperated by conditioning tank, comprehensive pool, flotation tank, pH conditioning tank, cooling tower, biochemistry pool and sedimentation basin, effectively remove the emulsion and degreasing agent in oily waste water, the content for reducing useless Organic substance in water, realizes qualified discharge.Wherein, it is equipped with heating chassis in conditioning tank, for increasing the temperature of oily waste water, improves demulsification；The comprehensive pool integrates neutralization pond, demulsification pond and flocculation basin, pre-processes to oily waste water, from oil removal by air bubbling effect.
Description
Technical field
The present invention relates to technical field of waste water processing more particularly to a kind of recovery methods of oil-containing stainless steel waste water.
Background technique
Oily wastewater of cold rolling mill is one of most intractable waste water of steel industry, the waste water mainly from milling train unit,
Between grinding roller and the draining of the oil depot of each unit such as strip degreasing unit.It originally, is using air bearing, filtering etc. to the processing containing waste water
Means remove the pollutants such as big portion's oil and suspended matter in oily waste water, then add hydrogen peroxide (H again2O2) waste water COD is reduced,
Because unit waste discharge fluctuation of concentration is very big, it is entirely different for normally producing with wastewater property when degreaser, reconditioning fluid exchange,
Its oil content and COD can differ decades of times to hundreds times, cause enormous impact to waste water treatment process, prevent waste water COD from steady
Fixed control is in discharge standard.Using hydrogen peroxide (H2O2) reduce waste water COD process section be unable to reach default treatment effect.
According to patent retrieval, the technique for carrying out catalyzing oxidizing degrading COD to oily waste water all selects certain carrier to hold
Carried catalyst needs to increase special facility and constantly updates, maintenance catalyst activity, needs certain investment in fixed assets and fortune
Row expense.
Wherein, the emulsion and degreasing agent in oily waste water, is difficult to remove in existing oil-contained waste water treatment system.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of recovery method of oil-containing stainless steel waste water, effectively remove
Remove the emulsion and degreasing agent in oily waste water.
The present invention also technical problems to be solved are, provide a kind of recovery method of oil-containing stainless steel waste water, technique letter
It is single, it does not need additionally to increase special facility, oily waste water can be handled using existing acid-bearing wastewater processing system.
In order to solve the above-mentioned technical problems, the present invention provides a kind of recovery methods of oil-containing stainless steel waste water, including with
Lower step:
The oily waste water that each unit discharges is discharged into conditioning tank, heating coil is equipped in conditioning tank, conditioning tank water outlet passes through
Elevator pump is promoted to comprehensive pool；
The pH value of waste water in comprehensive pool is adjusted to 7.1-8.5, the comprehensive pool has added coagulant；
The water outlet of comprehensive pool enters flotation tank, and the flotation tank is equipped with air release, generates a large amount of microbubble, described
Oils and suspended particle carrying in microbubble and waste water float up to the water surface, form dross；
Except removing dross, flotation tank, which is discharged, enters pH conditioning tank, adjusts water outlet pH value and is dropped to enter cooling tower after neutrality
Temperature, temperature are down to 20-35 DEG C；
Cooling tower water outlet enters biochemistry pool, and the biochemistry pool includes anaerobism/oxygen compatibility pool and aerobic tank, the anaerobism/simultaneous oxygen
Pond and aerobic tank are equipped with microbe carrier, wherein anaerobe and facultative microbe are attached to micro- in anaerobism/oxygen compatibility pool
On bio-carrier, macromolecular oily substance in degrading waste water, aerobic microbiological is attached on the microbe carrier in aerobic tank,
Organic matter in Decomposition Wastewater；
The water outlet of biochemistry pool enters sedimentation basin, and after precipitation, the supernatant of sedimentation basin enters reuse tank and carries out reuse, bottom
Partial sludge is back to biological tank, remaining sludge is delivered to sludge storage pool.
As an improvement of the above scheme, the diameter of the microbubble is 30-100 μm.
As an improvement of the above scheme, the surface of the microbubble has negative electrical charge.
As an improvement of the above scheme, the coagulant is cationic PAM, and the dosage of the coagulant is 0.06-
0.15wt%.
As an improvement of the above scheme, the hydraulic surface loading of the comprehensive pool is 0.1-0.3m3/(m2·h)。
As an improvement of the above scheme, flocculation reaction area is set in the pond of the comprehensive pool, waste water stops flocculation reaction area
Staying the time is 3-8min.
As an improvement of the above scheme, the microbe carrier is to have magnetic circular cylindrical solid carrier, micro- life
The magnetic intensity of object carrier is 5-10emu/g.
As an improvement of the above scheme, the microbe carrier preparation method the following steps are included:
40-60 parts of ferrous chloride, 60-80 parts of ferric trichlorides and 1-2 parts of ferrous oxide placements are stirred evenly in a reservoir；
100-120 parts of ammonium hydroxide are added into container, and heating water bath is carried out to container, obtain first after constant temperature 20-40min
Solid precipitate；
Water is added to the first solid precipitate, and carries out heating water bath, when temperature rises to 80 DEG C, surfactant is added
Oleic acid obtains the second solid precipitate after constant temperature 20-40min；
It is put into drying box after the second solid precipitate is washed with water, it is 5-7 hours dry, obtain magnetic-particle；
Magnetic-particle is dissolved in n-hexane, mixed solution is obtained, zeolite is put into mixed liquor, stands 40-60min；
Zeolite taking-up is dried, the zeolite after drying is sintered, the bio-carrier is obtained.
As an improvement of the above scheme, the sintering temperature is 250-270 DEG C and 480-500 DEG C, wherein in 250-270
It is sintered 30-50 minutes at DEG C, is sintered 10-20 minutes at 480-500 DEG C.
The invention has the following beneficial effects:
The recovery method of oil-containing stainless steel waste water of the invention passes through conditioning tank, comprehensive pool, flotation tank, pH conditioning tank, cold
But tower, biochemistry pool and sedimentation basin cooperate, and effectively remove emulsion and degreasing agent in oily waste water, reduce organic in waste water
The content of object realizes qualified discharge.
Specifically, the 30-100 μm of microbubble that air release generates, the rate of climb is slow, and the residence time is long in aqueous,
The extremely strong surface tension in its surface can by water oil slick and dissolved oil be adsorbed in bubble surface；More importantly due to aqueous vapor
Between surface tension be greater than bubble inner pressure, bubble in self shrink tendency, once shrink bubble inner pressure and surface tension lose
It goes to balance, bubbles burst, gas is dissolved completely in aqueous, and the fine oil droplets for being gathered in bubble surface at this time are gathered into greatly
Oil droplet simultaneously floats on the effect that rooved face realizes water-oil separating of decomposing therewith, and water-oil separating efficiency is up to 90% or more, bubbles burst
When the energy released of savings it is very huge, can produce the free radical that Strong oxdiative decomposes energy, superpower oxygenolysis energy is high
In oxidants such as chlorine, ultraviolet light, ozone, water and the various chemical substances of surrounding can be decomposed.
Further, since microbubble surface is negatively charged, electronegative bubble is easy and bacterium, organic matter suspended matter, gold
Belong to ion to attract each other oil slick, oilophilic bacteria etc. is enriched in bubble surface, and the organic matters such as oil are effectively decomposed by oilophilic bacteria, reaction efficiency
It can be improved 3-5 times, for organic removal rate up to 60-80%, biochemistry pool mainly removes aliphatic hydrocarbon contained in oily waste water, more
The dissolubilities hardly degraded organic substance such as cycloaromatics, organic acid, phenols, emulsion and degreasing agent are sent out rapidly in biochemistry pool in waste water
Raw reaction, is the ultimate substances such as water and carbon dioxide by the pollutant rapid mineralization in oily waste water, realizes the removal of pollutant,
Can be with the organic matter in fast decoupled water, COD removal rate reaches up to 95% or more and meets national standard of drainage.
In addition, bio-carrier of the invention is to have magnetic circular cylindrical solid carrier, it is not necessarily in sewage disposal process
Support construction；In addition, bio-carrier is because having magnetism, the biomembrane adherency of surface apposition growth in sewage disposal process
Property is good, will not generate biomembrane fragment in water process and influence water treatment efficiency；Secondly, the biography of microorganism can be improved in magnetic field
Matter rate and growth rate, and magnetic field can promote microbial enzyme synthesis, while can promote with the enzymatic activity of inducing microbial
Into the metabolism of microorganism；Further, sewage treating efficiency can be improved in magnetic field effect, for total nitrogen, total phosphorus, ammonia nitrogen and
The removal rate of COD all improves significantly；Finally, bio-carrier can increase the dissolved oxygen concentration in water, aeration quantity is reduced, thus
The operating cost for reducing sewage disposal technology, provides advantageous living condition for the microorganism in water, sewage is made to reach ideal
Treatment effect.
Detailed description of the invention
Fig. 1 is the schematic diagram of the recovery method of oil-containing stainless steel waste water of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.
A kind of recovery method of oil-containing stainless steel waste water provided by the invention, comprising the following steps:
The oily waste water that each unit discharges is discharged into conditioning tank, heating coil is equipped in conditioning tank, conditioning tank water outlet passes through
Elevator pump is promoted to comprehensive pool；
The pH value of waste water in comprehensive pool is adjusted to 7.1-8.5, the comprehensive pool has added coagulant；
The water outlet of comprehensive pool enters flotation tank, and the flotation tank is equipped with air release, generates a large amount of microbubble, described
Oils and suspended particle carrying in microbubble and waste water float up to the water surface, form dross；
Except removing dross, flotation tank, which is discharged, enters pH conditioning tank, adjusts water outlet pH value and is dropped to enter cooling tower after neutrality
Temperature, temperature are down to 20-35 DEG C；
Cooling tower water outlet enters biochemistry pool, and the biochemistry pool includes anaerobism/oxygen compatibility pool and aerobic tank, the anaerobism/simultaneous oxygen
Pond and aerobic tank are equipped with microbe carrier, wherein anaerobe and facultative microbe are attached to micro- in anaerobism/oxygen compatibility pool
On bio-carrier, macromolecular oily substance in degrading waste water, aerobic microbiological is attached on the microbe carrier in aerobic tank,
Organic matter in Decomposition Wastewater；
The water outlet of biochemistry pool enters sedimentation basin, and after precipitation, the supernatant of sedimentation basin enters reuse tank and carries out reuse, bottom
Partial sludge is back to biological tank, remaining sludge is delivered to sludge storage pool.
Specifically, each unit discharge waste water containing thin oil and emulsifying liquid waste water are discharged into conditioning tank, after homogeneous average, with being pumped to
Comprehensive pool, dosing coagulant form oil and suspended particle in waste water compared with big flocculating body；Comprehensive pool water outlet enters back into flotation tank,
A large amount of microbubbles that flotation tank releases by waste water oil and suspended particle carrying float up to pond face, form dross removal；
Waste water after air-flotation process flow to pH adjustment pond, adds soda acid medicament and adjust pH value to neutrality, then be delivered to cooling through pump
Tower cooling；Cooling tower water outlet carries out biochemical treatment from biochemistry pool is flow to, and anaerobe and facultative microbe can degrade big point
Seed oil substance enters aerobic tank after degradation, bio-carrier is housed in pond, and effect is to provide carrier for microorganism, is made
Microorganism not easily runs off, while being aerated to waste water, provides oxygen for microorganism, after biofilm, in the work of aerobic microbiological
Under, for the organic substance in waste water by complicated biochemical reaction, organic matter is broken down into CO2And H2O is absorbed into
For microorganism Self substances, to achieve the purpose that remove COD organic matter, the water outlet of aerobic tank enters sedimentation basin, sedimentation basin
Supernatant enters reuse tank and carries out reuse, bottom part sludge reflux to biological tank, remaining sludge is delivered to sludge storage pool.
The recovery method of oil-containing stainless steel waste water of the invention passes through conditioning tank, comprehensive pool, flotation tank, pH conditioning tank, cold
But tower, biochemistry pool and sedimentation basin cooperate, and effectively remove emulsion and degreasing agent in oily waste water, reduce organic in waste water
The content of object realizes qualified discharge.
Referring to Fig. 1, a kind of recovery system of oil-containing stainless steel waste water provided by the invention, including sequentially connected conditioning tank
11, comprehensive pool 12, flotation tank 13, pH conditioning tank 14, cooling tower 15, biochemistry pool 16 and sedimentation basin 17.
The conditioning tank 11 is used to collect the oily waste water of each unit discharge, wherein heating coil is equipped in conditioning tank 11,
For improving the temperature of waste water, to increase the demulsification of oily waste water, the dosage of demulsifier is reduced.Into one, conditioning tank
11 pond body is divided to two lattice, is set to work pool and accident pool according to operating condition.It is described in order to which waste water to be sufficiently mixed
Conditioning tank 11 is equipped with aerator, and the aerator is existing equipment, and the present invention does not have to specific limit.
Comprehensive pool 12 of the invention integrates neutralization pond, demulsification pond and flocculation basin.Wherein, neutralization pond is for adjusting oil-containing
The pH value of waste water, demulsification pond and flocculation basin are used to increase the oil removal by air bubbling effect of subsequent flotation tank.Specifically, comprehensive pool 12 is equipped with
First feeding system, first feeding system is by soda acid medicament, demulsifier and coagulant dosage into comprehensive pool 12.Described
One feeding system can be mechanical feeding apparatus, or Manual material feeding, the present invention is not specifically limited.
Since oily waste water of the invention needs waste water being adjusted to alkalescent for strong basicity in order to carry out flocculation reaction.
Preferably, the soda acid medicament is dust technology, and the present invention makes the pH value of waste water by the way that dust technology to be added in comprehensive pool
7.1-8.5, convenient for coagulant in waste water suspended matter and oil slick reacted.Preferably, by the pH of the waste water in comprehensive pool
Value is adjusted to 7.4-8.0.More preferably, the pH value of the waste water in comprehensive pool is adjusted to 7.5-7.8.
Demulsifier of the invention is existing demulsifier, and the present invention is not specifically limited.
Coagulant of the invention is cationic PAM, for further increasing wadding body, is pre-processed for air-flotation process.
It should be noted that the hydraulic surface loading of the comprehensive pool 12 is 0.1-0.3m3/(m2·h).Due to comprehensive pool
12 have added coagulant, and the coagulant is for wadding a quilt with cotton suspended matter, emulsion and the degreasing agent object in the water outlet of comprehensive pool
It is solidifying, when the hydraulic surface loading of comprehensive pool is less than 0.1m3/(m2When h), water flows through slowly, and coagulant is difficult to suspended matter, emulsification
Liquid and degreasing agent flocculate, when the hydraulic surface loading of comprehensive pool is greater than 0.3m3/(m2When h), water flow is too fast, and flocculate holds
It is easily broken up, and coagulant is easy to flow away, cannot sufficiently be reacted with suspended matter, emulsion and degreasing agent, cause the wave of coagulant
Take, increases the dosage of coagulant.Preferably, the hydraulic surface loading of the comprehensive pool is 0.15-0.25m3/(m2·h).It is more excellent
, the hydraulic surface loading of the comprehensive pool is 0.2m3/(m2·h)。
Further, flocculation reaction area is set in the pond of the comprehensive pool 12, residence time of the waste water in flocculation reaction area is 3-
8min.When the residence time being less than 3min, the reaction time is too short, and coagulant is difficult to abundant with suspended matter, emulsion and degreasing agent
Reaction, is not effectively form flocculate；When the residence time being greater than 8min, flocculation reaction is completed, and causes waste of time.
Preferably, residence time of the waste water in flocculation reaction area is 4-7min.More preferably, residence time of the waste water in flocculation reaction area is
5min。
The present invention cooperates the hydraulic surface loading of comprehensive pool by the way that flocculation reaction area is arranged in comprehensive pool, and
The dosage of coagulant can be effectively reduced in the residence time in flocculation reaction area in waste water.Preferably, the coagulant adds
Amount is 0.06-0.15wt%.Preferably, the dosage of the coagulant is 0.08-0.12wt%.More preferably, the coagulant
Dosage be 0.1wt%.
The flotation tank 13 is equipped with air release, generates a large amount of microbubble, the oils in the microbubble and waste water
The water surface is floated up to suspended particle carrying, forms dross.
Specifically, the waste water after adjusting, flocculating by pH enters flotation tank 13, generated by air release a large amount of micro-
Bubble, which rises, forms dross for the separation such as suspended matter and oil to the water surface.
It should be noted that being mixed with raw wastewater again after a part of pressure air-dissolving of water outlet after dissolved air flotation into gas
Floating pond, another part water outlet then carry out subsequent processing.
Wherein, the diameter of microbubble of the invention is 30-100 μm.Preferably, the diameter of the microbubble is 50-100 μ
m.More preferably, the diameter of the microbubble is 50-80 μm.Further, the surface of microbubble of the invention has negative electrical charge.This
The air release of invention is the existing equipment for generating microbubble.
The 30-100 μm of microbubble that air release generates, the rate of climb is slow, and the residence time is long in aqueous, surface pole
Strong surface tension can by water oil slick and dissolved oil be adsorbed in bubble surface；More importantly due to the table between aqueous vapor
Face tension is greater than bubble inner pressure, and bubble shrinks tendency in self, once the bubble inner pressure and surface tension disequilibrium that shrink, gas
Bubble rupture, gas i.e. be dissolved completely in aqueous, be gathered at this time bubble surface fine oil droplets be gathered into larger oil droplet and with
Float on the effect that rooved face realizes water-oil separating of decomposing, water-oil separating efficiency is up to 90% or more, and savings is put when bubbles burst
Energy out is very huge, can produce the free radical that Strong oxdiative decomposes energy, and superpower oxygenolysis energy is higher than chlorine, ultraviolet
The oxidants such as line, ozone can decompose water and the various chemical substances of surrounding.
Further, since microbubble surface is negatively charged, electronegative bubble is easy and bacterium, organic matter suspended matter, gold
Belong to ion to attract each other oil slick, oilophilic bacteria etc. is enriched in bubble surface, and the organic matters such as oil are effectively decomposed by oilophilic bacteria, reaction efficiency
It can be improved 3-5 times, for organic removal rate up to 60-80%, biochemistry pool mainly removes aliphatic hydrocarbon contained in oily waste water, more
The dissolubilities hardly degraded organic substance such as cycloaromatics, organic acid, phenols, emulsion and degreasing agent are sent out rapidly in biochemistry pool in waste water
Raw reaction, is the ultimate substances such as water and carbon dioxide by the pollutant rapid mineralization in oily waste water, realizes the removal of pollutant,
Can be with the organic matter in fast decoupled water, COD removal rate reaches up to 95% or more and meets national standard of drainage.
The pH conditioning tank 14 is used to receive the water outlet of flotation tank, by adding acid/base medicament for the pH value tune of waste water
After section is neutral, waste water is sent to cooling tower 15.
The cooling tower 15 is reacted for cooling down to waste water convenient for subsequent biochemical.Since the discharge of each unit contains
Oily waste water temperature is generally at 60 DEG C or more.Cooling tower of the invention is existing high temperature sewage type cooling tower, and the present invention, which is not done, to be had
Body limits.Wherein, waste water temperature is down to 20-35 DEG C by cooling tower.
The biochemistry pool 16 includes sequentially connected anaerobism/oxygen compatibility pool and aerobic tank, the anaerobism/oxygen compatibility pool and aerobic tank
It is equipped with microbe carrier, wherein anaerobe and facultative microbe are attached to the microbe carrier in anaerobism/oxygen compatibility pool
On, the macromolecular oily substance in degrading waste water, aerobic microbiological is attached on the microbe carrier in aerobic tank, Decomposition Wastewater
In organic matter.Wherein, the anoxic microorganism, facultative microbe and aerobic microbiological are existing wastewater treatment microbial,
The present invention is not specifically limited.
Due to lacking organic pollutant in waste water, the present invention needs first biochemistry pool to add carbon source, for maintaining micro- life
The activity of object.Preferably, the carbon source is glucose, starch etc..
It should be noted that microbe carrier of the invention is to have magnetic circular cylindrical solid carrier, the microorganism
The magnetic intensity of carrier is 5-10emu/g.
Wherein, the microbe carrier preparation method the following steps are included:
S101,40-60 parts of ferrous chloride, 60-80 parts of ferric trichlorides and 1-2 parts of ferrous oxide placements are stirred in a reservoir
Uniformly；
S102,100-120 parts of ammonium hydroxide are added into container, and heating water bath is carried out to container, after constant temperature 20-40min
To the first solid precipitate；
S103, water is added to the first solid precipitate, and carries out heating water bath, when temperature rises to 80 DEG C, surface is added
Activating agent oleic acid obtains the second solid precipitate after constant temperature 20-40min；
S104, it is put into drying box after the second solid precipitate is washed with water, it is 5-7 hours dry, obtain magnetic-particle；
S105, magnetic-particle is dissolved in n-hexane, obtains mixed solution, zeolite is put into mixed liquor, stand 40-
60min；
S106, zeolite taking-up is dried, the zeolite after drying is sintered, the bio-carrier is obtained.
Preferably, in step s 106, the sintering temperature is 250-270 DEG C and 480-500 DEG C, wherein in 250-270
It is sintered 30-50 minutes at DEG C, is sintered 10-20 minutes at 480-500 DEG C.
Bio-carrier of the invention is to have magnetic circular cylindrical solid carrier, without supporting knot in sewage disposal process
Structure；In addition, for bio-carrier because having magnetism, the biomembrane adhesiveness of surface apposition growth is good in sewage disposal process,
Biomembrane fragment will not be generated when water process and influences water treatment efficiency；Secondly, the mass transfer rate of microorganism can be improved in magnetic field
And growth rate, and magnetic field can promote microbial enzyme synthesis, while can promote micro- life with the enzymatic activity of inducing microbial
The metabolism of object；Further, sewage treating efficiency can be improved in magnetic field effect, for total nitrogen, total phosphorus, ammonia nitrogen and COD
Removal rate all improves significantly；Finally, bio-carrier can increase the dissolved oxygen concentration in water, aeration quantity is reduced, to reduce
The operating cost of sewage disposal technology provides advantageous living condition for the microorganism in water, sewage is made to reach ideal processing
Effect.
The sedimentation basin 17 is used to remove the suspended matter in aerobic tank water outlet, and refluxing portion sewage and sludge.
Specifically, the sedimentation basin 17 is equipped with sludge pump, the water outlet of biochemistry pool enters sedimentation basin, after precipitation, sedimentation basin
Supernatant enter reuse tank and carry out reuse, bottom part sludge is back to biological tank by sludge pump, remaining sludge is delivered to
Sludge storage pool.
Conditioning tank 11, comprehensive pool 12, pH conditioning tank 14, biochemistry pool 16 and sedimentation basin 17 of the invention can contain with existing
Sour sewage recovering system, which is realized, to be shared, and is not needed additionally to increase special facility, is reduced cost for wastewater treatment.
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, therefore equivalent changes made in accordance with the claims of the present invention, are still within the scope of the present invention.
Claims (9)
1. a kind of recovery method of oil-containing stainless steel waste water, which comprises the following steps:
The oily waste water that each unit discharges is discharged into conditioning tank, heating coil is equipped in conditioning tank, conditioning tank water outlet passes through promotion
Pump is promoted to comprehensive pool；
The pH value of waste water in comprehensive pool is adjusted to 7.1-8.5, the comprehensive pool has added demulsifier and coagulant；
The water outlet of comprehensive pool enters flotation tank, and the flotation tank is equipped with air release, generates a large amount of microbubble, micro- gas
Oils and suspended particle carrying in bubble and waste water float up to the water surface, form dross；
Except removing dross, flotation tank, which is discharged, enters pH conditioning tank, adjusts water outlet pH value and cools down to enter cooling tower after neutrality, temperature
Degree is down to 20-35 DEG C；
Cooling tower water outlet enters biochemistry pool, and the biochemistry pool includes anaerobism/oxygen compatibility pool and aerobic tank, the anaerobism/oxygen compatibility pool and
Aerobic tank is equipped with microbe carrier, wherein anaerobe and facultative microbe are attached to the microorganism in anaerobism/oxygen compatibility pool
On carrier, macromolecular oily substance in degrading waste water, aerobic microbiological is attached on the microbe carrier in aerobic tank, is decomposed
Organic matter in waste water；
The water outlet of biochemistry pool enters sedimentation basin, and after precipitation, the supernatant of sedimentation basin enters reuse tank and carries out reuse, bottom part
Sludge reflux to biological tank, remaining sludge is delivered to sludge storage pool.
2. the recovery method of oil-containing stainless steel waste water as described in claim 1, which is characterized in that the diameter of the microbubble is
30-100μm。
3. the recovery method of oil-containing stainless steel waste water as claimed in claim 2, which is characterized in that the surface band of the microbubble
There is negative electrical charge.
4. the recovery method of oil-containing stainless steel waste water as described in claim 1, which is characterized in that the coagulant is cation
PAM, the dosage of the coagulant are 0.06-0.15wt%.
5. the recovery method of oil-containing stainless steel waste water as claimed in claim 4, which is characterized in that the surface water of the comprehensive pool
Power load is 0.1-0.3m3/(m2·h)。
6. the recovery method of oil-containing stainless steel waste water as claimed in claim 5, which is characterized in that set in the pond of the comprehensive pool
Flocculation reaction area, residence time of the waste water in flocculation reaction area is 3-8min.
7. the recovery method of oil-containing stainless steel waste water as described in claim 1, which is characterized in that the microbe carrier is tool
Magnetic circular cylindrical solid carrier, the magnetic intensity of the microbe carrier are 5-10emu/g.
8. the recovery method of oil-containing stainless steel waste water as claimed in claim 7, which is characterized in that the system of the microbe carrier
Preparation Method the following steps are included:
40-60 parts of ferrous chloride, 60-80 parts of ferric trichlorides and 1-2 parts of ferrous oxide placements are stirred evenly in a reservoir；
100-120 parts of ammonium hydroxide are added into container, and heating water bath is carried out to container, obtain the first solid after constant temperature 20-40min
Precipitate；
Water is added to the first solid precipitate, and carries out heating water bath, when temperature rises to 80 DEG C, surfactant oil is added
Acid obtains the second solid precipitate after constant temperature 20-40min；
It is put into drying box after the second solid precipitate is washed with water, it is 5-7 hours dry, obtain magnetic-particle；
Magnetic-particle is dissolved in n-hexane, mixed solution is obtained, zeolite is put into mixed liquor, stands 40-60min；
Zeolite taking-up is dried, the zeolite after drying is sintered, the bio-carrier is obtained.
9. the recovery method of oil-containing stainless steel waste water as claimed in claim 8, which is characterized in that the sintering temperature is 250-
270 DEG C and 480-500 DEG C, wherein be sintered 30-50 minutes at 250-270 DEG C, be sintered 10-20 minutes at 480-500 DEG C.
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| CN111943396A (en) * | 2020-08-13 | 2020-11-17 | 江苏华晖环保科技有限公司 | Oily wastewater treatment system and treatment method |
| CN114853251A (en) * | 2022-06-08 | 2022-08-05 | 无锡兰德沃特环境科技有限公司 | Treatment method of oily emulsified wastewater |
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