CN106277560B - A kind of the source discharge-reducing method and system of high COD leveling precision waste water - Google Patents
A kind of the source discharge-reducing method and system of high COD leveling precision waste water Download PDFInfo
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Abstract
The present invention provides the source discharge-reducing method and system of a kind of high COD leveling precision waste water, and described method includes following steps: leveling precision waste water enters pH conditioning tank, is 6.5~8.6 from the water outlet pH value of pH conditioning tank；The leveling precision waste water enters back into anoxic reacter, enters aerobic aeration pond from the water outlet of anoxic reacter, and modified porous zeolite is placed in aerobic aeration pond and enters back into activated carbon adsorber, last qualified discharge after aerobic tank water outlet is with overflow enters intermediate pool excessively.Using processing system up to standard of the invention, one-time investment is low, runs easy to operate, and cost is relatively low for production processing, solve in leveling precision waste water COD can not qualified discharge the problems such as.
Description
Technical field
The invention belongs to water-treatment technology fields, and in particular to a kind of source discharge-reducing method of high COD leveling precision waste water and
System.
Background technique
As the basic industry in China, steel and iron industry is fast-developing since reform and opening-up, is constantly in high speed in recent years
Developing stage, steel annual output amplification is 15%~22%.But steel and iron industry be a high energy consumption, Gao Ziyuan, high pollution production
Industry, water resources consumption is huge, accounts for about the 14% of national industrial water consumption.
Leveling precision is important medium used in steel temper rolling technology process.Leveling precision is generally by following components group
At: rust remover, surfactant, lubricant, defoaming agent and deionized water etc..
The leveling precision wastewater pH that wet jetting piles process generates is 9~10, and conductivity is 400~4000us/cm, COD 1500
~5000mg/L.Leveling precision organic pollutant is more, and COD concentration is high, and the feature of biodegradability difference, traditional biological treatment is difficult to
It proves effective, there is no mature treatment process both at home and abroad at present with other waste water mixed processings after being diluted mostly is to be most difficult to handle
One of wastewater of steel industry.
Chinese patent CN102126807A discloses a kind of method for handling leveling waste liquor, good using demulsification, hydrolysis acidification
Aerobic membrane bioreactor process handles leveling precision waste water, and leveling precision waste water can achieve former national emission standard after treatment.
What the technology reached is old plant, and the index of new standard can't reach.Chinese patent CN102260028A discloses one kind
Cold rolling levelling liquor pretreatment method for wastewater and its system, including leveling precision wastewater equalization pond, PH adjust pond, coagulation tank, molten gas gas
Floating, biochemical system conditioning tank and bio-contact oxidation system.After processing, make into biochemical treatment system leveling precision COD≤
2000mg/l.The technology is preconditioning technique, it is also necessary to the process leveling waste liquor such as subsequent aerobic biochemical.Chinese patent
201120261855.1 disclosing a kind of utility model patent of waste water pretreatment system for cold-rolling flattening liquid, waste water adjusting is optimized
Pond, PH adjust the system arrangement in pond, coagulation tank, air-dissolving air-float, biochemical system conditioning tank.Leveling precision can only be made using the patent
COD≤2000mg/l, it is also necessary to the support of subsequent treatment process.
Country is just stepping up the discharge standard of waste water and relevant " energy-saving and emission-reduction " policy at present, on October, upper 2012
Promulgate that new " steel and iron industry pollution discharge standard " (GB13456-2012) was required from January 1st, 2015 from 1 day,
The standard PH that existing enterprise executes is 6~9, COD 30mg/L.
The object of the invention is to the water quality and quantity situations according to leveling precision waste water, develop economy, efficiently remove COD
Method and apparatus.Exploitation leveling precision wastewater sources emission-reducing process and device subtract using friendly process and energy-saving and emission-reduction as main task
Few environmental pollution, responds actively increasingly strict legislations of environmental protection.
Summary of the invention
In order to solve the problem of environmental pollution of the high COD of leveling precision waste water, the present invention provides a kind of high COD leveling precision waste water
The waste water treatment system and method for source emission reduction, using processing system up to standard of the invention, one-time investment is low, operation operation letter
Single, it is the environmentally protective treatment process of environmentally friendly steel wastewater that cost is relatively low for production processing.
Technical scheme is as follows:
A kind of source discharge-reducing method of high COD leveling precision waste water, which comprises the steps of:
Leveling precision waste water enters pH conditioning tank, is 6.5~8.6 from the water outlet pH value of pH conditioning tank；The leveling precision waste water
Anoxic reacter is entered back into, anoxic reacter hydraulic detention time is 10~28 hours；Enter from the water outlet of anoxic reacter
Oxygen aeration tank, places modified porous zeolite in aerobic aeration pond, and aerobic tank water outlet is entered back into crossing after overflow enters intermediate pool
Activated carbon adsorber, last qualified discharge；
The modified porous zeolite is to be prepared from the following steps:
(1) taking partial size is the zeolite of 25~45 mesh, is cleaned, drying；
(2) sodium agent is impregnated and modified: be added in every liter of water the sodium chloride of 15~75g, the magnesium chloride of 2~10g, 3~
The potassium chloride of 8g and the cetyl benzenesulfonic acid sodium of 1~5mg are configured to sodium agent solution；Every liter of sodium agent solution immersion 0.3~
5g dried zeolite, soaking time are cleaning to neutrality after 15~27 hours, drying；
(3) high temperature roast: the modified zeolite in step (2) by mass percentage: coal rhabdolith: clay=80~100:5~
The ratio of 10:2 mixes, and water is added, and mechanical balling-up first preheats, and is then warming up to 650 DEG C, constant temperature 30min；
(4) cooling: to obtain modified porous zeolite after cooling.
The source discharge-reducing method of a kind of high COD leveling precision waste water according to the present invention, it is preferred that described modified porous
Sized zeolite particles are 35~65 mesh, and specific surface area is 5.5~11.5m2/ g, saturated adsorption capacity are 0.8~1.3mmol/L.
A kind of source of the source discharge-reducing method of high COD leveling precision waste water high COD leveling precision waste water according to the present invention
Discharge-reducing method, it is preferred that soft cellulose filler is set in the anoxic reacter, and the soft cellulose filler unit diametrical is
120~180mm, spacing are 75~110mm, and density is 0.95~1.11gcm-3, tensile strength is 25~47MPa, unit bodies
1.7~2.9gVSS/L of biofilm biomass in product.
The source discharge-reducing method of a kind of high COD leveling precision waste water according to the present invention, it is preferred that described modified porous
The preparation of zeolite, the cleaning in step (1) are that the hydrochloric acid or phosphoric acid solution immersion 12~24 that concentration is 0.5~2mol/L is added
Hour, supernatant is then poured out, is cleaned with deionized water to neutrality, is dried 2~4 hours in 105~110 DEG C of air dry ovens；
In step (3) in chamber type electric resistance furnace 110 DEG C first preheat 100min, then temperature is first warming up to 650 by 110 DEG C
DEG C, heating rate is r=150~200 DEG C/h, constant temperature 30min at 650 DEG C.
A kind of source discharge-reducing method of high COD leveling precision waste water according to the present invention, it is preferred that the aerobic aeration
Dissolved oxygen concentration is 2~6mg/L in pond, and sludge concentration maintains 4500~6700mg/L, and hydraulic detention time is 15~42 small
When.
The source discharge-reducing method of a kind of high COD leveling precision waste water according to the present invention, it is preferred that described to pass through anoxic
After reactor, the water-quality COD of the leveling precision waste water is 900~3700mg/L.A kind of high COD is smooth according to the present invention
The source discharge-reducing method of liquid waste water, it is preferred that after aerobic reactor, the water-quality COD of the leveling precision waste water is 46~
135mg/L。
The source discharge-reducing method of a kind of high COD leveling precision waste water according to the present invention, it is preferred that the leveling precision is useless
Water hydraulic detention time in pH conditioning tank is 3~11min, and average flow rate is 5~12 cubic meters/hour, is added in pH conditioning tank
Concentration is that the industrial waste sulfuric acid of 2~7 mol/Ls is used to adjust pH.
The present invention also provides a kind of using a kind of system of the source discharge-reducing method of high COD leveling precision waste water, special
Sign is, including through the sequentially connected pH conditioning tank 1 of pipeline, level-one elevator pump 2, hypoxia response pond 3, aerobic reaction tank 5, intermediate
Pond 8, two-stage hoisting pump 9, activated carbon adsorber 10 and water outlet pump 11；The hypoxia response pond is in the hypoxia response pond 3
Soft cellulose filler 4 is set, and the soft cellulose filler 4 is the ring that hydroformylation fiber or dacron thread are pressed in the big plastic hoop of double-round
On, it is uniformly distributed fibre bundle；Modified porous zeolite 6 is placed in the aerobic reaction tank 5, in the aerobic reaction tank 5
Bottom is connected with blast aeration machine 7.
Detailed description of the invention:
A kind for the treatment of process system of the smooth also waste water of high COD, including PH conditioning tank, level-one elevator pump, to denitrogenate anoxic anti-
Ying Chi, soft cellulose filler, aerobic reaction tank, modified zeolite filler, blast aeration, intermediate pool, two-stage hoisting pump, active carbon
Adsorption tower, water outlet pump.
The water quality pH of the high COD leveling precision waste water is 9~10, and conductivity is 1200~4000us/cm, COD 1500
~5000mg/L.
The high COD leveling precision waste water flows into PH conditioning tank by pipeline.
Leveling precision waste water PH into PH conditioning tank is 9~10, and conditioning tank hydraulic detention time is 3~11min, mean flow
Amount is 5~12 cubic meters/hour.The adjusting cold rolling wastewater for the industrial waste sulfuric acid that concentration is 2~7 mol/Ls is added in PH conditioning tank.
Equipped with PH meter and robot control system(RCS) in conditioning tank, pH value control is 6.5~8.6 in water outlet, is adjusted by control PH robot control system(RCS) useless
The dosage of alkali.It is 5min that the present invention, which preferably adjusts hydraulic detention time, and average flow rate is 6 cubic meters/hour, and it is 5 that concentration, which is added,
The industrial waste sulfuric acid of mol/L adjusts leveling precision waste water.
Then leveling precision waste water enters anoxic reacter by elevator pump, has soft fibre in reactor major function reactor
Filler is tieed up, the growth of anoxic bacteria is maintained, keeps its sludge concentration in 5800~8300mg/L, dissolved oxygen is lower than 0.5mg/L, this hair
Bright preferred sludge concentration maintains 7300mg/L.Its structure of soft cellulose filler is that plastic disks clinching is changed to the big plastics of double-round
Hydroformylation fiber or dacron thread are pressed on the ring of ring, are uniformly distributed fibre bundle by ring；Inner ring is flakes plastics branch, both
Energy biofilm, and bubble can be effectively cut, improve the transfer rate and utilization rate of oxygen.Soft cellulose filler unit diametrical be 120~
180mm, spacing are 75~110mm, and density is 0.95~1.11gcm-3, tensile strength is 25~47MPa, life in unit volume
1.7~2.9gVSS/L of object film amount.The present invention is preferably that unit diametrical is 165mm, spacing 105mm, density 1.05gcm-3, tensile strength is the soft cellulose filler of 45Mpa, and biofilm biomass maintains 2.3gVSS/L or so in unit volume.
After anoxic reacter, the water-quality COD of the leveling precision waste water is 900~3700mg/L.
Waste water enters aerobic aeration pond after anoxic reacter, and aerobic aeration bottom of pond portion has blast aeration machine, it is ensured that dissolved oxygen
Concentration is 2~6mg/L.The sludge concentration of reactor maintains 4500~6700mg/L, and hydraulic detention time is 15~42 hours,
The preferred hydraulic detention time of the present invention is 28 hours, sludge concentration 6100mg/L.Modified porous boiling is placed in aerobic aeration pond
Stone not only contributes to denitrification flora type and forms flora gradient distribution and promote the growth of activated sludge, and converts smooth
COD, ammonia nitrogen and heavy metal in liquid waste water.The preparation of modified porous zeolite: 1) it sieves: sieve classification being crossed using crusher, sieve takes grain
Diameter is the zeolite of 25~45 mesh.2) it cleans: it is small for hydrochloric acid or the phosphoric acid solution immersion 12~24 of 0.5~2mol/L that concentration is added
When, supernatant is then poured out, is cleaned with deionized water to neutrality.It is dried 2~4 hours in 105~110 DEG C of air dry ovens.3)
Sodium agent is impregnated and modified: be added in every liter of water the sodium chloride of 15~75g, the magnesium chloride of 2~10g, 3~8g potassium chloride and
The cetyl benzenesulfonic acid sodium etc. of 1~5mg is configured to sodium agent solution.It is dried that every liter of sodium agent solution impregnates 0.3~5g
Zeolite, soaking time are 15~27 hours.Then supernatant is poured out, is cleaned with deionized water to neutrality, in 105~110 DEG C of drums
Wind drying box is dried 3~6 hours.4) high temperature roast: modified zeolite: coal rhabdolith: clay (mass percent)=80~100:5 is pressed
The ratio of~10:2 is uniformly mixed, and a certain amount of water is added, and mechanical balling-up first preheats 100min for 110 DEG C in chamber type electric resistance furnace,
Then temperature is first warming up to 650 DEG C by 110 DEG C, and heating rate is r=150~200 DEG C/h, constant temperature 30min at 650 DEG C.5) certainly
It is so cooling: and then natural cooling, it is hardened after fusant is cooling, modified porous zeolite is made after cooling.Modified porous sized zeolite particles are
35~65 mesh, specific surface area are 5.5~11.5m2/ g, saturated adsorption capacity are 0.8~1.3mmol/L.Modified porous zeolite is not
Ammonia nitrogen, heavy metal can be only adsorbed, and can be had using microorganism in interpore growth, is good microbe stuffing.
" modified porous zeolite " specific surface area provided by the invention is 9.8m2/ g, saturated adsorption capacity 1.1mmol/L.
Modified porous zeolite can have using microorganism in interpore growth, be good microbe stuffing.
After aerobic reactor, the water-quality COD of the leveling precision waste water is 46~135mg/L.
Aerobic tank water outlet enters intermediate pool with overflow is crossed, and intermediate pool is entering activated carbon adsorption by two-stage hoisting pump
Tower.
There is granular activated carbon packing layer in the activated carbon adsorber, the partial size of shell granular activated carbon is 35~75 mesh,
Moisture content is 0.1~2.5%, and ash content is 1.6~2.7%, and specific surface area is 2700~3250m2/ g, methylene blue adsorption value are
95~127mg/g, backwashing period are 6~28 hours, and washing time is 10~25min.
Subsequent leveling precision waste water is discharged into drainage pipeline by water outlet pump.
After the processing of entire leveling precision source emission-reducing process, the effluent quality PH of the leveling precision waste water is 6~9, COD
National emission standard is fully achieved for 18~29mg/L.
Advantageous effects:
The source discharge-reducing method and system, system of a kind of high COD leveling precision waste water provided by the invention solve leveling precision
Discharge of wastewater pollutes the problem of environment.The invention belongs to the environmentally protective production technologies of steel.The present invention is with the Green Water of low cost
Processing technique efficiently solve in leveling precision waste water COD can not qualified discharge the problems such as.The present invention has economical and environmentally friendly double
Weight effect, has good social benefit and environmental benefit.
Detailed description of the invention
Fig. 1 is high COD leveling precision wastewater sources emission-reducing process provided by the invention and device figure.
Include: PH conditioning tank 1, level-one elevator pump 2, hypoxia response pond 3, soft cellulose filler 4, aerobic reaction tank 5, be modified
Porous zeolite 6, blast aeration machine 7, intermediate pool 8, two-stage hoisting pump 9, activated carbon adsorber 10, water outlet pump 11.
Specific embodiment
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but it is of the invention
Content is not limited solely to the following examples.
Embodiment 1:
A kind for the treatment of process system of high COD leveling precision waste water, including PH conditioning tank, level-one elevator pump, to denitrogenate anoxic anti-
Ying Chi, soft cellulose filler, nutrient source mixing pit, aerobic reaction tank, modified zeolite filler, blast aeration, intermediate pool, second level
Elevator pump, activated carbon adsorber, water outlet pump.
The water quality of the leveling precision waste water: pH 9.7, conductivity 3700us/cm, COD 3700mg/L.
The leveling precision waste water flows into PH conditioning tank by pipeline.
Leveling precision waste water PH into PH conditioning tank is 9.7, and conditioning tank hydraulic detention time is 5min, average flow rate 6
Cubic meter/hour.The adjusting cold rolling wastewater for the industrial waste sulfuric acid that concentration is 5 mol/Ls is added in PH conditioning tank.It is equipped in conditioning tank
PH meter and robot control system(RCS), pH value control are 7.3 in water outlet, and the dosage of salkali waste is adjusted by control PH robot control system(RCS).
Then leveling precision waste water enters anoxic reacter by elevator pump, and reactor major function is to pass through anti-nitration reaction
The nitrogen-containing pollutant in leveling precision waste water based on nitrate nitrogen is removed, anoxic reacter hydraulic detention time is 16 hours.Reaction
There is soft cellulose filler in device, maintain the growth of abnormal denitrifying bacterium, keep its sludge concentration in 7300mg/L, dissolved oxygen is lower than
0.5mg/L.Its structure of soft cellulose filler is that plastic disks clinching is changed to the big plastic hoop of double-round, by hydroformylation fiber or dacron thread
It is pressed on the ring of ring, is uniformly distributed fibre bundle；Inner ring is flakes plastics branch, biofilm and can effectively cut gas
Bubble, improves the transfer rate and utilization rate of oxygen.It is 165mm that soft cellulose filler, which is unit diameter, spacing 105mm, and density is
1.05g·cm-3, tensile strength is the soft cellulose filler of 45Mpa, and biofilm biomass maintains the left side 2.3gVSS/L in unit volume
It is right.
After anoxic reacter, the water-quality COD of the leveling precision waste water is 3100mg/L.
Waste water enters aerobic aeration pond after anoxic reacter, and aerobic aeration bottom of pond portion has blast aeration machine, it is ensured that dissolved oxygen
Concentration is 5mg/L.The sludge concentration of reactor maintains 6100mg/L, and hydraulic detention time is 28 hours.In aerobic aeration pond
Modified porous zeolite is placed, denitrification flora type is not only contributed to and forms flora gradient distribution and promote the life of activated sludge
It is long, and convert COD in leveling precision waste water.The preparation of modified porous zeolite: 1) it sieves: sieve classification being crossed using crusher, sieve takes
Partial size is the zeolite of 40 mesh.2) it cleans: the hydrochloric acid or phosphoric acid solution immersion 15 hours that concentration is 1.5mol/L is added, then pours out
Supernatant is cleaned with deionized water to neutrality.It is dried 3 hours in 110 DEG C of air dry ovens.3) sodium agent is impregnated and is modified:
The sodium chloride of 65g, the magnesium chloride of 8g, the potassium chloride of 7g and cetyl benzenesulfonic acid sodium of 3mg etc. are added in every liter of water to be configured to
Sodium agent solution.Every liter of sodium agent solution impregnates the dried zeolite of 3g, and soaking time is 23 hours.Then supernatant is poured out,
It is cleaned with deionized water to neutrality, is dried 5 hours in 110 DEG C of air dry ovens.4) high temperature roast: modified zeolite: coal rhabdolith is pressed:
Clay (mass percent)=100:10:2 ratio is uniformly mixed, and a certain amount of water, mechanical balling-up, in chamber type electric resistance furnace is added
Interior 110 DEG C first preheat 100min, and then temperature is first warming up to 650 DEG C by 110 DEG C, and heating rate is r=150 DEG C/h, at 650 DEG C
Constant temperature 30min.5) natural cooling: and then natural cooling, it is hardened after fusant is cooling, modified porous zeolite is made after cooling.It is modified
Porous zeolite specific surface area is 9.8m2/ g, saturated adsorption capacity 1.1mmol/L.Modified porous zeolite, which can have, utilizes micro- life
Object is good microbe stuffing in interpore growth.
After aerobic reactor, the water-quality COD of the leveling precision waste water is 105mg/L.
Aerobic tank water outlet enters intermediate pool with overflow is crossed, and intermediate pool is entering activated carbon adsorption by two-stage hoisting pump
Tower.
There is granular activated carbon packing layer in the activated carbon adsorber, the partial size of shell granular activated carbon is 60 mesh, aqueous
Rate is 2.1%, and ash content 2.3%, specific surface area is 3100m2/ g, methylene blue adsorption value 113mg/g, backwashing period are
21 hours, washing time 15min.
Subsequent leveling precision waste water is discharged into drainage pipeline by water outlet pump.
After the processing of entire leveling precision source emission-reducing process, the effluent quality PH of the leveling precision waste water is 7.5, COD
National emission standard is fully achieved for 21mg/L.
Embodiment 2:
A kind for the treatment of process system of the smooth also waste water of high COD, including PH conditioning tank, level-one elevator pump, to denitrogenate anoxic anti-
Ying Chi, soft cellulose filler, aerobic reaction tank, modified zeolite filler, blast aeration, intermediate pool, two-stage hoisting pump, active carbon
Adsorption tower, water outlet pump.
The water quality of the leveling precision waste water: pH 9.2, conductivity 2600us/cm, COD 2300mg/L.
The leveling precision waste water flows into PH conditioning tank by pipeline.
Leveling precision waste water PH into PH conditioning tank is 9.2, and conditioning tank hydraulic detention time is 7min, average flow rate 12
Cubic meter/hour.The adjusting cold rolling wastewater for the industrial waste sulfuric acid that concentration is 5 mol/Ls is added in PH conditioning tank.It is equipped in conditioning tank
PH meter and robot control system(RCS), pH value control are 7.8 in water outlet, and the dosage of salkali waste is adjusted by control PH robot control system(RCS).
Then leveling precision waste water enters anoxic reacter by elevator pump, and reactor major function is to pass through anti-nitration reaction
The nitrogen-containing pollutant in leveling precision waste water based on nitrate nitrogen is removed, anoxic reacter hydraulic detention time is 22 hours.Reaction
There is soft cellulose filler in device, maintain the growth of abnormal denitrifying bacterium, keep its sludge concentration in 6100mg/L, dissolved oxygen is lower than
0.5mg/L.Its structure of soft cellulose filler is that plastic disks clinching is changed to the big plastic hoop of double-round, by hydroformylation fiber or dacron thread
It is pressed on the ring of ring, is uniformly distributed fibre bundle；Inner ring is flakes plastics branch, biofilm and can effectively cut gas
Bubble, improves the transfer rate and utilization rate of oxygen.It is 165mm that soft cellulose filler, which is unit diameter, spacing 105mm, and density is
1.05g·cm-3, tensile strength is the soft cellulose filler of 45Mpa, and biofilm biomass maintains the left side 2.7gVSS/L in unit volume
It is right.
After anoxic reacter, the water-quality COD of the leveling precision waste water is 3100mg/L.
Waste water enters aerobic aeration pond after anoxic reacter, and aerobic aeration bottom of pond portion has blast aeration machine, it is ensured that dissolved oxygen
Concentration is 5mg/L.The sludge concentration of reactor maintains 4700mg/L, and hydraulic detention time is 32 hours.In aerobic aeration pond
Modified porous zeolite is placed, denitrification flora type is not only contributed to and forms flora gradient distribution and promote the life of activated sludge
It is long, and convert COD, ammonia nitrogen and heavy metal in leveling precision waste water.The preparation of modified porous zeolite: 1) it sieves: using crusher
Sieve classification is crossed, it is the zeolite of 30 mesh that sieve, which takes partial size,.2) it cleans: the hydrochloric acid or phosphoric acid solution immersion 20 that concentration is 0.9mol/L is added
Hour, supernatant is then poured out, is cleaned with deionized water to neutrality.It is dried 4 hours in 105 DEG C of air dry ovens.3) sodium agent
It impregnates and modified: the cetyl benzene of the sodium chloride of 71g, the magnesium chloride of 3g, the potassium chloride of 3g and 1.2mg being added in every liter of water
Sodium sulfonate etc. is configured to sodium agent solution.Every liter of sodium agent solution impregnates the dried zeolite of 2.1g, and soaking time is 17 hours.
Then supernatant is poured out, is cleaned with deionized water to neutrality, is dried 4 hours in 105 DEG C of air dry ovens.4) it high temperature roast: presses
Modified zeolite: coal rhabdolith: clay (mass percent)=85:7:2 ratio is uniformly mixed, and is added a certain amount of water, it is mechanical at
Ball first preheats 100min for 110 DEG C in chamber type electric resistance furnace, and then temperature is first warming up to 650 DEG C by 110 DEG C, heating rate r=
Constant temperature 30min at 200 DEG C/h, 650 DEG C.5) natural cooling: and then natural cooling, it is hardened after fusant is cooling, is made and changes after cooling
Property porous zeolite.Modified porous zeolite specific surface area is 7.9m2/ g, saturated adsorption capacity 1.2mmol/L.Modified porous zeolite
Ammonia nitrogen, heavy metal can be not only adsorbed, but also can be had using microorganism in interpore growth, is that good microorganism is filled out
Material.
After aerobic reactor, the water-quality COD of the leveling precision waste water is 136mg/L.
Aerobic tank water outlet enters intermediate pool with overflow is crossed, and intermediate pool is entering activated carbon adsorption by two-stage hoisting pump
Tower.
There is granular activated carbon packing layer in the activated carbon adsorber, the partial size of shell granular activated carbon is 50 mesh, aqueous
Rate is 0.7%, and ash content 1.7%, specific surface area is 3100m2/ g, methylene blue adsorption value 97mg/g, backwashing period are
22 hours, washing time 10min.
Subsequent leveling precision waste water is discharged into drainage pipeline by water outlet pump.
After the processing of entire leveling precision source emission-reducing process, the effluent quality PH of the leveling precision waste water is 7.5, COD
National emission standard is fully achieved for 21mg/L.
In conclusion the processing system of leveling precision source of the present invention emission reduction realizes the row up to standard of leveling precision waste water
It puts, present invention process one-time investment is low；Liquid waste processing effect stability；Production run is at low cost；High degree of automation, operation letter
It is single.The present invention has fully demonstrated the effect of energy-saving and emission-reduction, is environmentally friendly green process for producing steel and iron.
Certainly, those skilled in the art in the art are it should be appreciated that above-described embodiment is intended merely to illustrate this hair
It is bright, rather than it is used as limitation of the invention, as long as transformation, change in spirit of the invention, to above-described embodiment
Shape will all be fallen within the scope of the claims.
Claims (9)
1. a kind of source discharge-reducing method of high COD leveling precision waste water, which comprises the steps of:
Leveling precision waste water enters pH conditioning tank, is 6.5~8.6 from the water outlet pH value of pH conditioning tank；The leveling precision waste water again into
Enter anoxic reacter, leveling precision waste water hydraulic detention time in anoxic reacter is 10~28 hours；From hypoxia response
The water outlet of device enters aerobic aeration pond, and modified porous zeolite is placed in aerobic aeration pond, and aerobic tank water outlet passes through in overflow entrance
Between behind pond, enter back into activated carbon adsorber, last qualified discharge；
The modified porous zeolite is to be prepared from the following steps:
(1) taking partial size is the zeolite of 25~45 mesh, is cleaned, drying；
(2) sodium agent impregnates and modified: the sodium chloride of 15~75g, the magnesium chloride of 2~10g, 3~8g being added in every liter of water
The cetyl benzenesulfonic acid sodium of potassium chloride and 1~5mg are configured to sodium agent solution；It is dry that every liter of sodium agent solution impregnates 0.3~5g
Dry good zeolite, soaking time are cleaning to neutrality after 15~27 hours, drying；
(3) high temperature roast: the modified zeolite in step (2) by mass percentage: coal rhabdolith: clay=80~100:5~10:2
Ratio mixing, water is added, mechanical balling-up first preheats, and is then warming up to 650 DEG C, constant temperature 30min；(4) cooling: after cooling
To modified porous zeolite；
Soft cellulose filler is set in the anoxic reacter, the soft cellulose filler unit diametrical is 120~180mm,
Away from for 75~110mm, density is 0.95~1.11gcm-3, tensile strength is 25~47MPa, biofilm biomass in unit volume
1.7~2.9g VSS/L；
The water quality pH of the high COD leveling precision waste water is 9~10, and conductivity is 1200~4000 μ S/cm, COD is 1500~
5000mg/L。
2. a kind of source discharge-reducing method of high COD leveling precision waste water according to claim 1, which is characterized in that the modification
Porous zeolite partial size is 35~65 mesh, and specific surface area is 5.5~11.5m2/ g, saturated adsorption capacity are 0.8~1.3mmol/L.
3. a kind of source discharge-reducing method of high COD leveling precision waste water according to claim 1, which is characterized in that the modification
The preparation of porous zeolite, the cleaning in step (1) are that the hydrochloric acid or phosphoric acid solution immersion 12 that concentration is 0.5~2mol/L is added
~24 hours, supernatant is then poured out, is cleaned with deionized water to neutrality, it is small in 105~110 DEG C of air dry oven drying 2~4
When；
In step (3) in chamber type electric resistance furnace 110 DEG C first preheat 100min, then temperature is first warming up to 650 DEG C by 110 DEG C,
Heating rate is r=150~200 DEG C/h, constant temperature 30min at 650 DEG C.
4. a kind of source discharge-reducing method of high COD leveling precision waste water according to claim 1, which is characterized in that described aerobic
Dissolved oxygen concentration is 2~6mg/L in aeration tank, and sludge concentration maintains 4500~6700mg/L, hydraulic detention time is 15~
42 hours.
5. a kind of source discharge-reducing method of high COD leveling precision waste water according to claim 1, which is characterized in that pass through anoxic
After reactor, the water-quality COD of the leveling precision waste water is 900~3700mg/L.
6. a kind of source discharge-reducing method of high COD leveling precision waste water according to claim 1, which is characterized in that the modification
The preparation of porous zeolite, after aerobic reactor, the water-quality COD of the leveling precision waste water is 46~135mg/L.
7. a kind of source discharge-reducing method of high COD leveling precision waste water according to claim 1, which is characterized in that described smooth
Liquid waste water hydraulic detention time in pH conditioning tank is 3~11min, and average flow rate is 5~12 cubic meters/hour, in pH conditioning tank
The industrial waste sulfuric acid that concentration is 2~7 mol/Ls is added to be used to adjust pH.
8. a kind of source discharge-reducing method of high COD leveling precision waste water according to claim 1, which is characterized in that described in process
Source discharge-reducing method, it is 18~29mg/L that the effluent quality pH of the leveling precision waste water, which is 6~9, COD, and national row is fully achieved
Put standard.
9. it is a kind of using a kind of any one of claim 1-8 system of the source discharge-reducing method of high COD leveling precision waste water,
It is characterized in that, including through the sequentially connected pH conditioning tank (1) of pipeline, level-one elevator pump (2), hypoxia response pond (3), aerobic reaction
Pond (5), intermediate pool (8), two-stage hoisting pump (9), activated carbon adsorber (10) and water outlet pump (11)；In the hypoxia response pond
(3) soft cellulose filler (4) are set in, the soft cellulose filler (4) is that hydroformylation fiber or dacron thread are pressed in the big modeling of double-round
On the ring for expecting ring, it is uniformly distributed fibre bundle；Modified porous zeolite (6) is placed in the aerobic reaction tank (5), described
The bottom of aerobic reaction tank (5) is connected with blast aeration machine (7).
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| JPS5385947A (en) * | 1977-01-05 | 1978-07-28 | Hitachi Ltd | Method of treating waste liquid containing nitrogen compounds |
| CN101054249A (en) * | 2006-04-11 | 2007-10-17 | 同济大学 | Multipoint water feeding sewage treatment process by zeolite and organism united adsorption and regeneration |
| CN101423314A (en) * | 2008-12-03 | 2009-05-06 | 北京师范大学 | High efficiency denitrification, phosphorus removal and phosphorus resource recovery composite for urban sewage |
| CN102139987A (en) * | 2010-01-29 | 2011-08-03 | 张文波 | Membrane bioreactor |
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| JPS5385947A (en) * | 1977-01-05 | 1978-07-28 | Hitachi Ltd | Method of treating waste liquid containing nitrogen compounds |
| CN101054249A (en) * | 2006-04-11 | 2007-10-17 | 同济大学 | Multipoint water feeding sewage treatment process by zeolite and organism united adsorption and regeneration |
| CN101423314A (en) * | 2008-12-03 | 2009-05-06 | 北京师范大学 | High efficiency denitrification, phosphorus removal and phosphorus resource recovery composite for urban sewage |
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