CN110127946A - A kind for the treatment of process of wastewater from chemical industry with high salt - Google Patents
A kind for the treatment of process of wastewater from chemical industry with high salt Download PDFInfo
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- CN110127946A CN110127946A CN201910451351.7A CN201910451351A CN110127946A CN 110127946 A CN110127946 A CN 110127946A CN 201910451351 A CN201910451351 A CN 201910451351A CN 110127946 A CN110127946 A CN 110127946A
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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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
- C02F7/00—Aeration of stretches of water
Abstract
The invention discloses a kind for the treatment of process of wastewater from chemical industry with high salt, the technique includes following procedure: the primary aerobic decomposition of homogeneous stirring and adjusting, flocculation sedimentation, organic matter anaerobic digestion, organic matter, the aerobic decomposition of organic matter second level and the pond MBR carry out mud-water separation, the technique can carry out efficient processing to wastewater from chemical industry with high salt, reach waste water and receive pipe standards；Overcome that salts substances are inhibited to microorganism, investment is big, operating cost is high, are difficult to reach many problems such as expected clean-up effect；Overcome due to salinity height cause waste water density height cause activated sludge easily float loss the problem of.
Description
Technical field
The present invention relates to a kind for the treatment of process of wastewater from chemical industry with high salt.
Background technique
Wastewater from chemical industry with high salt refers to the waste water of total saliferous mass fraction at least 1%, mainly from chemical plant processing etc..This
Kind waste water contains many kinds of substance (including salt, oil, organic heavy metal).The way of production of saliferous wastewater from chemical industry is extensive, water also by
Year increases.Organic pollutant in removal saline sewage influences most important caused by environment.
It is handled using bioanalysis, the salts substances of high concentration are inhibited to microorganism, at physico-chemical process
Reason, investment is big, and operating cost is high, and is difficult to reach expected clean-up effect.Such waste water is handled using bioanalysis, still
It is emphasis studied both at home and abroad at present.
For the organic matter of high salinity wastewater from chemical industry according to production process difference, the type and chemical property of contained organic matter are poor
It is different larger, but contained salts substances are mostly Cl-、SO4 2-、Na+、Ca2+Equal salts substances.Although these ions are all that microorganism is raw
Nutrient necessary to long plays promotion enzyme reaction in the growth course of microorganism, maintains membrane equilibrium and adjusts osmotic pressure
Important function.If but these ion concentrations are excessively high, inhibition and toxic action can be generated to microorganism, main to show: salt is dense
Degree is high, osmotic pressure is high, microbial cell dehydration causes cellular plasm to separate；Salting out reduces dehydrogenase activity；Chlorine from
Sub- height is to the toxic effect of bacterium；Salinity is high, and the density of waste water increases, and activated sludge easily floats loss, to seriously affect
The clean-up effect of biological treatment system.
Summary of the invention
For above-mentioned technical problem of the existing technology, the purpose of the present invention is to provide a kind of wastewater from chemical industry with high salt
Treatment process can effectively prevent pollution of the wastewater from chemical industry with high salt to environment, by most organic pollutants, outstanding in waste water
Floating object removal provides reliable and stable condition for subsequent processing.
Technical scheme is as follows:
A kind for the treatment of process of wastewater from chemical industry with high salt, includes the following steps
S1: wastewater from chemical industry with high salt enters conditioning tank, installs aeration stirring system in conditioning tank, air is passed through exposure using air blower
Gas agitating system is stirred homogeneous to waste water in conditioning tank, unevenly causes to make subsequent sewage disposal system to alleviate waste water
At impact, waste water obtains homogeneous waste water after homogeneous is sufficiently stirred；
S2: homogeneous waste water obtained by step S1 enters the first reaction tank with blender, and feeding lime water in the first reaction tank is adjusted
PH value is saved to neutrality, while after limewash is added, the settleability of waste water can be more preferably, sufficiently after reaction mixed in the first reaction tank
It closes liquid and enters back into the second reaction tank, PAC is added in the second reaction tank and is sufficiently reacted, the mixed liquor in the second reaction tank enters back into
Third reaction tank adds PAM in third reaction tank, is sufficiently formed after reaction and contains the cotton-shaped suspended matter of the good bulky grain of settleability
Waste water, waste water again from flow into primary sedimentation tank carry out mud-water separation, supernatant (supernatant is the waste water after flocculation sedimentation) gravity flow
Enter intermediate pool, boosted pump enters step S3 after being promoted, and sludge is delivered to sludge concentration tank through sludge pump, enters step S9；
S3: being pumped into hydrolysis acidification pool for the waste water after flocculation sedimentation that step S2 is obtained, flowing line be arranged in hydrolysis acidification pool,
Avoid the formation of the short flow phenomenon of moisture, be added with anaerobic activated sludge in hydrolysis acidification pool, the anaerobic activated sludge by sludge and
Anaerobic bacteria on sludge is attached to form；A large amount of anaerobic activated sludges divide the organic matter in waste water in hydrolysis acidification pool
Solution makes larger molecular organics resolve into small organic molecule, while in order to improve activated sludge concentration, setting in hydrolysis acidification pool
Fiber filler beam enables sludge and anaerobic bacteria to adhere on fiber filler beam.Anaerobic bacteria will be significantly larger than the tolerance level of salt
Oxygen bacterium, after hydrolysis acidification acts on, most of larger molecular organics are broken down into small organic molecule, make subsequent aerobic work
Sequence energy stability and high efficiency carries out.It is then allowed to stand carry out mud-water separation, waste water and sludge after obtaining anaerobic digestion, after anaerobic digestion
Waste water, from level-one aerobic tank is flowed into, enters step S4, excess sludge enters step S9 by sludge drainage system by overflow weir.
S4: the waste water that step S3 is obtained installs aerator in aerobic tank, utilizes air blower from level-one aerobic tank is flowed into
By aerator blast aeration in level-one aerobic tank, and aerobic activated sludge is added in level-one aerobic tank, it is described aerobic
Activated sludge is made of sludge and the aerobic bacteria being attached on sludge, aerobic in water under conditions of oxyty > 2.0mg/L
Most organic in waste water is resolved into the innocuous substances such as water and carbon dioxide by bacterium, this process COD reduction amount up to 70% with
On, make the COD < 1000mg/L in waste water, muddy water mixed solution enters step S5.
S5: the muddy water mixed solution that step S4 is obtained is flowed into secondary settling tank certainly, in secondary settling tank by way of gravitational settling
Mud-water separation is carried out, obtains supernatant and sludge, setting mud scraper will be dirty by sludge pump after collecting sludge in secondary settling tank
Mud is back to step S4, and excess sludge enters step S9, after supernatant passes through overflow weir, from inflow step 6.
S6: it is dirty to be added with aerobic activity from second level aerobic tank is flowed into for the supernatant that step S5 is obtained in second level aerobic tank
Mud (aerobic activated sludge is made of sludge and the aerobic bacteria being attached on sludge), aerobic tank is interior to install aerator, utilizes drum
Blower is by aerator blast aeration in second level aerobic tank, and in water under conditions of oxyty > 2.0mg/l, second level is good
Remaining fraction organic matter is resolved into water and carbon dioxide by the aerobic activated sludge in oxygen pond, after obtaining secondary aerobic decomposition
Mud mixture, make the COD < 250mg/L in waste water, muddy water mixed solution enters step S7.
S7: the muddy water mixed solution that step S6 is obtained is from the pond MBR is flowed into, relatively common useless since high-salt wastewater salt content is high
Water density is high, and activated sludge does not allow easily settled collection, will cause activated sludge using precipitating pool process and is lost.It is installed in the pond MBR
There is MBR film, the mud mixture carries out mud-water separation under the action of MBR film, obtains filter liquor and thickened sludge, effectively mention
Highly enriched sludge concentration greatly improves volumetric loading, MBR Membrane cleaning device is set in MBR membranous system, utilize to 8000mg/L or more
Soda acid and fungicide clean MBR film, restore MBR membrane flux, and the pond MBR is additionally provided with sludge pump, and thickened sludge is back to
Step S6, excess sludge enter step S9, and filter liquor enters step S8.
S8: the filter liquor that step S7 is obtained enters the 4th reaction tank with blender, adds PAC in the 4th reaction tank
And after sufficiently reacting, the mixed liquor in the 4th reaction tank enters the 5th reaction tank with blender, throws in the 5th reaction tank
After adding PAM and sufficiently reacting, the waste water containing the cotton-shaped suspended matter of the good bulky grain of settleability is formed, the waste water is again from inflow
Primary sedimentation tank carries out mud-water separation, obtains supernatant and sludge；If the COD content in the supernatant does not reach discharge standard,
The supernatant is then back to step S3 reprocessing, sludge is delivered to sludge concentration tank through sludge pump, enters step S9.
S9: the step S2, sludge that S3, S5, S8 are generated is collected in sludge concentration tank, is pumped into sludge condensation by sludge pump
After system carries out sludge dewatering, sludge dewatering equipment is arranged in sludge dewatering system, and filtrate is back to step S1 reprocessing, and sludge is de-
Outward transport is handled after water desiccation.
Preferably, fiber filler beam is arranged in step S3 hydrolysis acidification pool, make activated sludge by being attached to fibre bundle
It on filler, is distributed in entire hydrolysis acidification pool, improves the volumetric loading of hydrolysis acidification pool, give full play to the effect of hydrolysis acidification pool
Rate；
Preferably, water circulating pump is arranged in step S3 hydrolysis acidification pool, hydrolysis acidification pool top water is recycled to bottom discharge pipe
In line, makes waste water evenly into hydrolysis acidification pool, avoid the short stream of water.
Preferably, aeration stirrer is arranged in the pond MBR, under conditions of aeration stirring, activated sludge is not allowed easy to stick
It is attached on MBR film, slows down MBR flux depression speed, extend the service life of MBR；
Preferably, the filter liquor flowed out from the pond MBR is in the case where water quality reaching standard, can not added PAC, PAM carry out it is anti-
In the case where answering, it is directly entered final deposition pool.Under normal circumstances, the pond MBR water outlet basically reaches discharge standard, and final deposition pool plays water outlet
The effect checked on, in the case where water quality reaching standard, to save operating cost and causing unnecessary waste, the 4th reaction tank,
It is out of service that five reaction tanks can not add medicament.
Preferably, sludge dewatering system is provided with conditioning tank, PAM is added in conditioning tank, sludge is further improved
Concentration, effectively improves the efficiency of sludge dewatering equipment.
The beneficial effects of the present invention are: the technique can carry out efficient processing to wastewater from chemical industry with high salt, reach waste water
To receiving pipe standards；Overcome that salts substances are inhibited to microorganism, investment is big, operating cost is high, are difficult to reach expected
Many problems such as clean-up effect；It overcomes since salinity height causes the density height of waste water that activated sludge is caused easily to float loss
The problem of.
Specific embodiment
The present invention is further explained in the light of specific embodiments, but the scope of protection of the present invention is not limited thereto.
Embodiment 1:
The total salt content of wastewater from chemical industry with high salt used in the present embodiment is 10000mg/L, COD value 5000mg/L, major pollutants
For heavy metal ion, organochlorine compound, polycyclic organic compound, grease etc..
A kind of main flow of the treatment process of haline water wastewater from chemical industry is as follows:
Haline water wastewater from chemical industry is sent in conditioning tank, and waste water mixes well water quality, while pre-exposure by aeration stirring in conditioning tank
Gas makes the characteristic of waste water change, and keeps waste water settleability more preferable, and subsequent coagulating sedimentation is enable to go on smoothly, and it is useless to obtain homogeneous
Water.
Waste water lifting pump by be aerated sufficiently it is homogeneous after waste water lifting to the first reaction tank, add stone in the first reaction tank
PH is adjusted to neutrality by buck, and in neutral conditions, heavy metal ion hydrate in conjunction with hydroxyl forms suspended matter.
Then the mixed liquor in the first reaction tank enters back into the second reaction tank, and PAC is added in the second reaction tank, and PAC dosage is
100mg/L sufficiently forms suspending aluminum hydroxide object after reaction, adsorbs short grained suspended matter.Then mixed in the second reaction tank
It closes liquid and enters back into third reaction tank, PAM is added in third reaction tank, PAM dosage is 10PPb, the distinctive long-chain molecule knot of PAM
Suspended matter is flocculated and is assembled by structure, is formed the cotton-shaped suspended matter of sheet easily settled, is obtained the waste water of large stretch of cotton-shaped suspended matter.The
Waste water in three reaction tanks enters primary sedimentation tank and carries out mud-water separation, obtains supernatant and sludge, and sludge is collected by mud scraper
Afterwards, sludge concentration tank being drained into using sludge pump, supernatant enters intermediate pool by overflow weir gravity flow, in primary sedimentation tank system,
It is acted on by coagulating sedimentation, removes heavy metal, suspended matter and a small amount of organic pollutant of the overwhelming majority.
Supernatant in intermediate pool is promoted to hydrolysis acidification pool by elevator pump, and drainpipe is arranged in hydrolysis acidification bottom of pond portion
Line, having a large amount of activated sludge in hydrolysis acidification pool, (activated sludge is by sludge and the anaerobic bacteria group being attached on sludge
At), under anaerobic, the larger molecular organics in waste water, which are attached to the anaerobic bacteria on activated sludge and resolve into small molecule, to be had
Machine object, while reduce the COD value in waste water on a small quantity, the treatment effeciency of subsequent aerobic process is greatly improved, to improve hydrolysis acid
Change the volumetric loading in pond, fiber filler beam is installed in hydrolysis acidification pool, is attached to activated sludge on fiber filler beam.So
It stands afterwards and carries out mud-water separation, waste water and sludge after obtaining anaerobic digestion；Waste water after anaerobic digestion flows automatically after overflow weir
Into level-one aerobic tank, excess sludge is emitted into sludge concentration tank.
There are a large amount of activated sludge in level-one aerobic tank, aerobic bacteria is attached on activated sludge, air blower is aerobic by level-one
Aerator in pond is aerated aerobic tank, makes dissolved oxygen in water concentration in 2-4mg/L, and under aerobic environment, aerobic bacteria is logical
It crosses aerobic effect and the most organic in waste water is resolved into the evolution of the innocuous gas such as water, carbon dioxide, nitrogen, the process
Up to 70% or more, muddy water mixed solution (enters a small amount of reduction amount of COD value in waste water from secondary settling tank progress mud-water separation is flowed into
COD < 1000mg/L in the muddy water mixed solution of secondary settling tank).
Secondary settling tank separates sludge and waste water, sludge reflux to level-one aerobic tank front end, excess sludge by gravitational settling
It is discharged into sludge concentration tank, supernatant flows into second level aerobic tank after passing through overflow weir certainly；
There are a large amount of activated sludge in second level aerobic tank, aerobic bacteria is attached on activated sludge, air blower passes through in second level aerobic tank
Aerating system aerobic tank is aerated, make dissolved oxygen in water in 2-4mg/L, under aerobic environment, aerobic bacteria pass through aerobic work
The evolution of the innocuous gas such as water, carbon dioxide, nitrogen, process residual are resolved by most residual organic matters in waste water
For the removal rate of organic matter up to 75% or more, muddy water mixed solution carries out mud-water separation, filter liquor COD≤250mg/ from the pond MBR is flowed into
L。
Due to containing a large amount of salinity in wastewater from chemical industry with high salt, waste water density is higher, if using conventional precipitation pond, exists
Due to waste water density height cause activated sludge easily float loss the problem of, but use MBR film carry out mud-water separation, there is no dirt
Volumetric loading is effectively promoted up to 8000mg/L in mud floating losing issue, sludge concentration.Waste water is made in the suction of suction pump
Under, penetrating MBR film and form filter liquor, sludge is then trapped in the pond MBR, and is back to second level aerobic tank by sludge pump,
Excess sludge is emitted into sludge concentration tank, and the filter liquor for penetrating MBR film enters final deposition pool.
Level-one aerobic tank and second level aerobic tank, which is arranged, to be advantageous in that: in level-one aerobic tank the Microflora of activated sludge compared with
Height, volumetric loading can reach 4.0kg COD/m3.d, microorganism is in increased logarithmic phase, organic pollutant quickly, in large quantities by
Microorganism adsorption removes in form of a sludge, there is the features such as load is high, the residence time is short, the saving energy, impact resistance；Second level is good
Oxygen is mainly for the treatment of the aerobic residual organic matter for being difficult to decompose of level-one, and volumetric loading is generally in 0.25-0.75 kg COD/
m3.d, organic matter is slowly handled using the microorganism deceleration rise period, organic matter is decomposed into H2O、CO2、N2Equal innocuous substances, phase
Energy consumption is larger for, the relatively low disadvantage of volumetric loading, but can amounts of residual contamination is innoxious, to difficult to degrade and low dense
Degree pollutant has the advantages of higher removal rate.
Waste water basically reaches discharge standard after the pond MBR forms filter liquor, for the stably reaching standard discharge for ensuring waste water, MBR
Chi Houshe final deposition pool.Final deposition pool leading portion is provided with the 4th reaction tank and the 5th reaction tank for having blender, is discharged through the pond MBR
Filter liquor initially enter in the 4th reaction tank, PAC (add concentration be 80mg/L) and sufficiently anti-is added in the 4th reaction tank
Ying Hou, the mixed liquor in the 4th reaction tank enter back into the 5th reaction tank, and (add concentration is addition PAM in the 5th reaction tank
After reacting 10ppb) and sufficiently, formed containing the fine suspension and small part organic matter in bulky grain suspended matter, absorption waste water
The waste water of equal pollutants, waste water carry out mud-water separation in final deposition pool, obtain supernatant and sludge.Supernatant qualified discharge, sludge
Sludge concentration tank is delivered to through sludge pump；To save operating cost, pass through the case where MBR Chi Houke is with stably reaching standard in waste water
Under, the 4th reaction tank and the 5th reaction tank can not adding medicine, the direct emission after final deposition pool.
Sludge concentration tank collect from primary sedimentation tank, hydrolysis acidification pool, secondary settling tank, the pond MBR, final deposition pool sludge, pass through weight
Power concentration, reduces moisture percentage in sewage sludge, and the supernatant that gravity concentration obtains is back to conditioning tank, and the concentration that gravity concentration obtains is dirty
Mud is delivered to sludge conditioning tank through sludge pump, and sludge conditioning tank sets blender, while adding PAM medicament and improving sludge,
The sludge after conditioning is delivered to sludge dewatering equipment into dredge pump and carries out sludge drying processing, filter liquor is back to conditioning tank, desiccation
Sludge outward transport processing.
The present invention can effectively prevent pollution of the wastewater from chemical industry with high salt to environment.The technique can to wastewater from chemical industry with high salt into
The efficient processing of row reaches waste water and receives pipe standards；Overcome salts substances are inhibited to microorganism, investment is big,
Operating cost is high, is difficult to reach many problems such as expected clean-up effect；It overcomes since salinity height leads to the density of waste water
Height cause activated sludge easily float loss the problem of.
Content described in this specification is only to enumerate to inventive concept way of realization, and protection scope of the present invention is not answered
When the concrete form for being seen as limited by embodiment and being stated.
Claims (7)
1. a kind for the treatment of process of wastewater from chemical industry with high salt, it is characterised in that the following steps are included:
S1: wastewater from chemical industry with high salt is passed into conditioning tank, aerator is equipped in conditioning tank, through aerator into conditioning tank
Aeration carries out agitation dispersion to wastewater from chemical industry with high salt, obtains homogeneous waste water；
Homogeneous waste water obtained by S2: step S1 enters in reaction tank, successively feeding lime water, PAC and PAM and respectively reaction it is abundant
Afterwards, the waste water containing the cotton-shaped suspended matter of bulky grain is formed, the waste water flows into primary sedimentation tank again and carries out mud-water separation, and it is heavy to obtain flocculation
Waste water and sludge behind shallow lake；
S3: the waste water after flocculation sedimentation obtained by step S2 enters in hydrolysis acidification pool, added with anaerobism activity in hydrolysis acidification pool
Sludge, the anaerobic activated sludge is by sludge and is attached to anaerobic bacteria on sludge and forms, and the anaerobic bacteria is by the big portion in waste water
Point larger molecular organics resolve into small organic molecule, are then allowed to stand carry out mud-water separation, the waste water after obtaining anaerobic digestion and
Sludge；
S4: the waste water after anaerobic digestion obtained by step S3 enters level-one aerobic tank, and aerator is equipped in level-one aerobic tank, and
Aerobic activated sludge is added in level-one aerobic tank, the aerobic activated sludge is by sludge and the aerobic bacteria group being attached on sludge
At under conditions of being passed through oxygen by aerator, the most organic in waste water is resolved into water by the aerobic bacteria
And carbon dioxide, the mud mixture after obtaining aerobic decomposition；
S5: mud mixture obtained by step S4 enters secondary settling tank, carries out muddy water point by way of gravitational settling in secondary settling tank
From obtaining supernatant and sludge, the COD value < 1000mg/L in the supernatant；
S6: step S2, the sludge that S3, S5 are obtained is collected in sludge concentration tank together, makes moisture percentage in sewage sludge by gravity concentration
Reduce, sludge pass through again sludge pump be pumped into sludge condensation system carry out sludge dewatering after, obtain dewatered sludge.
2. a kind for the treatment of process of wastewater from chemical industry with high salt according to claim 1, it is characterised in that further comprising the steps of:
S7: supernatant obtained by step S5 enters second level aerobic tank, and aerator, and second level aerobic tank are equipped in second level aerobic tank
Interior to be added with aerobic activated sludge, under conditions of being passed through oxygen by aerator, the aerobic activity in second level aerobic tank is dirty
Remaining fraction organic matter is resolved into water and carbon dioxide by mud, the mud mixture after obtaining secondary aerobic decomposition；
S8: mud mixture obtained by step S7 enters the pond MBR, MBR film is equipped in the pond MBR, the mud mixture is in MBR film
Under the action of carry out mud-water separation, obtain filter liquor and thickened sludge, the COD value < 250mg/L in the filter liquor is described dense
Contracting sludge is collected in sludge concentration tank, reduces moisture percentage in sewage sludge by gravity concentration, sludge passes through sludge pump again and is pumped into dirt
After mud concentration systems carry out sludge dewatering, dewatered sludge is obtained.
3. a kind for the treatment of process of wastewater from chemical industry with high salt according to claim 1, it is characterised in that the specific mistake of step S2
Journey are as follows: the reaction tank includes the first reaction tank, the second reaction tank and third reaction tank for being equipped with blender, to the first reaction
Pond, the second reaction tank and third reaction tank are separately added into limewash, PAC and PAM, and the homogeneous waste water sequentially enters the first reaction
Pond, the second reaction tank and third reaction tank simultaneously react sufficiently, flow into primary sedimentation tank again from the mixed liquor of third reaction tank outflow and carry out
Mud-water separation, waste water and sludge after obtaining flocculation sedimentation.
4. a kind for the treatment of process of wastewater from chemical industry with high salt according to claim 1, it is characterised in that in step S2, primary sedimentation tank
Equipped with mud discharging system, the mud discharging that mud-water separation is generated to sludge concentration tank；In step S3, hydrolysis acidification pool sets dirt
Mud exhaust system, the sludge mud discharging that mud-water separation is obtained to sludge concentration tank.
5. a kind for the treatment of process of wastewater from chemical industry with high salt according to claim 2, it is characterised in that in step S8, the pond MBR
Be provided with mud discharging system, thickened sludge be emitted into sludge concentration tank, the concentration of the thickened sludge 8000mg/L with
On.
6. a kind for the treatment of process of wastewater from chemical industry with high salt according to claim 1, it is characterised in that in step S3, the water
Fiber filler beam is installed in solution acidification pool, is attached to anaerobic bacteria and sludge on fiber filler beam.
7. a kind for the treatment of process of wastewater from chemical industry with high salt according to claim 2, it is characterised in that further comprising the steps of:
S9: filter liquor obtained by step S8 enters the 4th reaction tank with blender, and the interior addition PAC of the 4th reaction tank is simultaneously sufficiently anti-
Ying Hou, the mixed liquor in the 4th reaction tank enter the 5th reaction tank with blender, and addition PAM is simultaneously abundant in the 5th reaction tank
After reaction, the mixed liquor in the 5th reaction tank enters final deposition pool and precipitate simultaneously mud-water separation, obtains the qualified supernatant of discharge.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111943427A (en) * | 2020-07-10 | 2020-11-17 | 山东东顺环保科技有限公司 | High salt wastewater treatment system that contains |
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| CN107445406A (en) * | 2017-09-07 | 2017-12-08 | 浩蓝环保股份有限公司 | A kind of spinning printing and dyeing waste water reclamation processing method and processing system |
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| CN111943427A (en) * | 2020-07-10 | 2020-11-17 | 山东东顺环保科技有限公司 | High salt wastewater treatment system that contains |
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