CN101428941B - Process for treating wastewater from pulping papermaking - Google Patents
Process for treating wastewater from pulping papermaking Download PDFInfo
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- CN101428941B CN101428941B CN2008102339490A CN200810233949A CN101428941B CN 101428941 B CN101428941 B CN 101428941B CN 2008102339490 A CN2008102339490 A CN 2008102339490A CN 200810233949 A CN200810233949 A CN 200810233949A CN 101428941 B CN101428941 B CN 101428941B
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 230000008569 process Effects 0.000 title claims abstract description 44
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
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- 239000000126 substance Substances 0.000 claims description 8
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 7
- 230000000813 microbial effect Effects 0.000 claims description 7
- 235000016709 nutrition Nutrition 0.000 claims description 7
- 230000035764 nutrition Effects 0.000 claims description 7
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- 239000000463 material Substances 0.000 claims description 6
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- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
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- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 4
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- 150000002978 peroxides Chemical class 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
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- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
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- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 2
- QKSIFUGZHOUETI-UHFFFAOYSA-N copper;azane Chemical compound N.N.N.N.[Cu+2] QKSIFUGZHOUETI-UHFFFAOYSA-N 0.000 description 2
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- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
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- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
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- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 1
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- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a process for treating paper-making sewage, which comprises the following steps: 1. sewage in a water collecting pond is lifted to a fiber recovering tank for fiber recovery; 2. the discharged water is guided in a hydrolysis acidification tank for hydrolysis acidification reaction; 3. the discharged water is pretreated; 4. the sewage after pretreatment is guided in an anaerobic tank to degrade organic pollutants by anaerobic microorganism; 5. the discharged water at the step 4 is guided in a destabilization tank for improving biodegradability of the sewage; 6. the discharged water is guided in an aerobic biological tank for treatment; 7. the discharged water is guided in a secondary sedimentation tank for mud-water separation; and 8. the discharged water is sterilized and disinfected to meet the discharge standard and discharge into a clean water tank, and pressurized by a water pump and sent to a reuse water pipe network. The process has simple process and lower cost, and the discharged water directly meets the new standards, and the treating capabilities of the anaerobic tank and the aerobic biological tank are greatly improved simultaneously; moreover, the process only uses a small quantity of medicaments, and generates relatively less sludge.
Description
Technical field
The present invention relates to a kind of sewage treatment process and device thereof, relate in particular to a kind of pulping papermaking sewerage treatment process and device thereof.
Background technology
Pulping papermaking sewerage belongs to high chroma, high basicity, high organic pollutant, highly difficult trade effluent that bio-degradable is low.Sewage source in get the raw materials ready, workshop section such as boiling, bleaching, papermaking, contain organism such as multiple alkane, hydrocarbon, phenol, acid, benzene, alcohol, aldehyde, ketone, ether, anthracene, quinone, sugar, amine, Mierocrystalline cellulose, hemicellulose and lignin and derivative thereof, polymkeric substance, halides in the sewage.Enterprises in pulp and paper industry is after carrying out the alkali recovery, usually adopt conventional anaerobism to add aerobic treatment process, under reasonable in design and sewage treatment facility are moved preferably situation, its water outlet substantially can the GB3544-2001 standard requirement, but can't satisfy the requirement of new national standard " pulp and paper industry pollution discharge standard " GB3544-2008, so after secondary biochemical treatment, carry out advanced treatment, caused the characteristics that treatment scheme is long, laid down cost is high, working cost is high.
At present, the advanced treatment process for pulping papermaking sewerage that occurs at new standard is generally: gac/activated coke absorption method, strong oxidizer oxidation style, efficient decolorizing engineering bacteria, electrolytic process, photocatalytic method, UF+RO (ultrafiltration+reverse osmosis) embrane method, lignin by acid separation method etc.But all there is certain defective in the technology of these several routines: absorption method need add a large amount of sorbent materials, adsorbs saturated back and loses efficacy, and cost is high and produce a large amount of mud; Oxidation style (ozone, hydrogen peroxide, hypochlorous acid etc.) decolorizing effect is not obvious, the processing cost height; The condition harshness that the efficient decolorizing engineering bacteria needs is difficult to use in through engineering approaches; Electrolytic process, that effect is sent out in photochemical catalysis is better, but the power consumption height causes running cost to accept; Although UF+RO embrane method treatment effect is good, need very strict pretreatment system, laid down cost that it is high and working cost are all very high; Lignin by acid separation need add a large amount of acid to water quality, adjusts back pH value with alkali again after xylogen is separated out, the processing cost height, and Xiang Shuizhong has added a large amount of ions.Want to reduce processing cost and can reach good treatment effect, must change traditional processing mode.
Simultaneously; in the existing secondary biochemical treatment technology, the clearance of anaerobic pond chemical oxygen demand (COD) (be called for short COD) is generally all between 45%～55%, and the water outlet of Aerobic Pond is very muddy after precipitate and separate; its COD is generally at 400～450mg/L, and the treatment efficiency of anaerobism and Aerobic Pond is all on the low side.
Summary of the invention
The technical problem to be solved in the present invention provides that a kind of technology is simple, cost is lower, usefulness is high and water outlet can reach the pulping papermaking sewerage treatment process and the device thereof of new standard-required.
For solving the problems of the technologies described above, basic design of the present invention is: according to the water quality characteristics of pulping papermaking sewerage, find out anaerobism and the low reason of Aerobic Pond usefulness, carry out necessary pre-treatment targetedly, improve the performance of reactor itself simultaneously, that is: in the sewage disposal operation of routine, set up sewage is carried out pretreated operation and takes off steady pond, it is to remove to produce the foamy tensio-active agent in the sewage that sewage is carried out pretreated effect, and drive away hydrogen sulfide in the sewage, simultaneously the sulfonium ion in the sewage being oxidized to elemental sulfur separates out, reduce sulfate radical and sulfonium ion restraining effect, for the efficient operation of anaerobic pond creates conditions to anaerobion; Sewage carries out series of physical and chemical reaction in taking off steady pond, transfer by electronics, make xylogen, lignin derivatives, organic chloride etc. that chain rupture and free radical substitution reaction take place, thereby destruction chromophoric group, improve the biodegradability of sewage simultaneously, thereby make the aerobe effect carry out easily and efficiently, react with the part operation reach of advanced treatment and in conjunction with the anaerobic and aerobic in the second-stage treatment, make the water outlet after handling to reach new emission standard, and technology is simple, cost is lower.
As the first kind of technical scheme that realizes that the present invention conceives substantially, a kind of pulping papermaking sewerage treatment process may further comprise the steps:
1. the pulping papermaking sewerage in the water collecting basin is promoted to and carries out fiber recovery in the fiber recovery pond;
2. hydrolysis acidification pool is introduced in step water outlet 1., the acidication reaction is taken place in this pond, and the suspended substance in the sewage is held back;
It is characterized in that: this technology is further comprising the steps of:
3. pre-treatment is carried out in step water outlet 2.;
4. will introduce in the anaerobic pond through pretreated sewage, in anaerobic pond, add nitrogen, phosphorus nutrition salt, and utilize anaerobion to carry out the degraded of organic pollutant;
5. step water outlet is 4. introduced and taken off in the steady pond, in taking off steady pond, make the lignin material take off surely, destroy chromophore in the sewage because of, the biodegradability of raising sewage;
6. the aerobe pond is introduced in step water outlet 5. and carry out aerobic treatment;
7. second pond is introduced in step water outlet 6. and carried out mud-water separation;
8. with step water outlet 7. qualified discharge or enter clean water basin behind sterilization and disinfection, after the water pump pressurization, deliver to the reuse water pipe network.
As the second kind of technical scheme that realizes that the present invention conceives substantially, a kind of pulping papermaking sewerage treatment process may further comprise the steps:
1. the pulping papermaking sewerage in the water collecting basin is promoted to and carries out fiber recovery in the fiber recovery pond;
2. hydrolysis acidification pool is introduced in step water outlet 1., the acidication reaction is taken place in this pond, and the suspended substance in the sewage is held back;
It is characterized in that: this technology is further comprising the steps of:
3. step water outlet is 2. introduced in the anaerobic pond, in anaerobic pond, added nitrogen, phosphorus nutrition salt, utilize anaerobion to carry out the degraded of organic pollutant;
4. pre-treatment is carried out in step water outlet 3.;
5. will introduce through pretreated water and take off steady pond, and in taking off steady pond, make the lignin material take off surely, destroy chromophore in the sewage because of, the biodegradability of raising sewage;
6. the aerobe pond is introduced in step water outlet 5. and carry out aerobic treatment;
7. second pond is introduced in step water outlet 6. and carried out mud-water separation;
8. with step water outlet 7. qualified discharge or enter clean water basin behind sterilization and disinfection, after the water pump pressurization, deliver to the reuse water pipe network.
Pre-treatment described in above-mentioned two kinds of schemes comprises earlier sewage being introduced in the preaeration tank reacts, sewage carries out aeration and thorough mixing in this pond, remove the generation foamy tensio-active agent in the sewage, drive the hydrogen sulfide in the sewage simultaneously, and the sulfonium ion in the sewage is oxidized to elemental sulfur separates out; Afterwards, will carry out precipitate and separate in the sewage introducing mixed precipitation pond through the preaeration processing.
As the improvement of above-mentioned first kind and second kind technical scheme, sewage carries out limited aeration and water part and refluxes, with the process of accelerated reaction in the process of taking off the reaction of steady pond; In anaerobic pond, add the anaerobism filler and carry out microbial immobilizedly, adopt double-deck triphase separator to carry out the separation of gas, solid, liquid simultaneously, improve the processing efficiency of anaerobic pond; In the aerobe pond, add cylindric polypropylene filler, form the mud embrane method, increase the length of biomass and biologic chain, improve its water outlet effect; In above-mentioned first kind of technical scheme, in the mixed precipitation pond, introduce the recirculation water of anaerobic pond, to reduce the dissolved oxygen in the sewage, in this pond, add lime simultaneously, quicken mud-water separation and produce calcium sulfate precipitation, for follow-up biochemical treatment creates conditions.
A kind of device of implementing the pulping papermaking sewerage treatment process describedly takes off steady pond and adopts the BAF structural shape, and stopping composition is a sponge iron, and the density of sponge iron is 1.6～1.8t/m
3, diameter is 4～6mm, treatment sewage in taking off steady pond with effective duration of contact sponge iron be 90～120min.
Compared with prior art, the technology of the present invention has the following advantages:
1, technology of the present invention is simple, cost is lower and its water outlet can directly reach new standard-required.The present invention has increased the pretreatment process of sewage in the sewage treatment process of routine and has taken off steady operation, it is to remove to produce the foamy tensio-active agent in the sewage that sewage is carried out pretreated effect, and drive away hydrogen sulfide in the sewage, simultaneously the sulfonium ion in the sewage being oxidized to elemental sulfur separates out, reduce sulfate radical and sulfonium ion restraining effect, for the efficient operation of anaerobic pond creates conditions to anaerobion; Sewage carries out series of physical and chemical reaction in taking off steady pond, transfer by electronics, make xylogen, lignin derivatives, organic chloride etc. that chain rupture and free radical metalepsy take place, destroy chromophoric group, improve the biodegradability of sewage simultaneously, and then in conjunction with existing secondary biochemical treatment, make that the CODcr of effluent quality is 60～80mg/L, colourity is 8～16 times, reach new emission standard, the oxygen amount that above-mentioned CODcr is consumed when being meant and making oxygenant with potassium bichromate under sour environment.And existing technology can only satisfy old standard GB3544-2001 requirement, if will satisfy new standard GB3544-2008 requirement, must after the secondary biochemical treatment system, set up new advanced treatment of wastewater system, can increase investment and working cost like this, technology of the present invention is with the workshop section such as the preaeration tank of advanced treatment system, taking off steady pond etc. merges with the secondary biochemical treatment system and considers, make it become the pretreatment system of corresponding workshop section of secondary biochemical treatment system, specifically, preaeration tank becomes the pretreatment system of anaerobic pond, taking off steady pond becomes the pretreatment system in aerobe pond, guaranteeing under the water outlet prerequisite up to standard like this, flow process shortens, reduce investment outlay and working cost, and more help the performance of secondary biochemical treatment system effectiveness.
2, the present invention can greatly improve the anaerobic pond handling property.The present invention increases acidication and pretreatment process before anaerobic pond, can effectively reduce the restraining effect of materials such as vitriol to anaerobion, the condition that provides for the efficient operation of anaerobic reactor; In anaerobic pond, set up simultaneously the anaerobism filler and carried out microbial immobilizedly, adopted double-deck triphase separator to carry out the separation of gas, solid, liquid, to improve the processing efficiency of anaerobic pond.
3, the present invention can improve the handling property in aerobe pond.Before the aerobe pond, increase and take off steady pond, make xylogen, lignin derivatives, organic chloride etc. that chain rupture and free radical metalepsy take place, destroy chromophoric group, improve the biodegradability of sewage simultaneously, become pulping papermaking sewerage and be conventional sewage, like this by changing foodstuff structure, the nutrition that has had microorganism to be easy to absorb in the sewage, make sewage handle easily, improved the handling property in aerobe pond; By in Aerobic Pond, adding columned polypropylene filler, form the mud embrane method in addition, increase the length of biomass and biologic chain, improve the water outlet effect.
4, technology of the present invention only adds a spot of medicament, and the mud of generation is few.This technology just adds a spot of activator, coagulating agent, flocculation agent in taking off steady pond, mixed precipitation pond and two precipitations, and the sludge reduction effect of hydrolysis acidification pool makes the mud generation further reduce, and the sludge quantity that therefore adopts the present invention and produced is less relatively.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is the process flow sheet of first embodiment of pulping papermaking sewerage treatment process of the present invention.
Fig. 2 is the process flow sheet of second embodiment of pulping papermaking sewerage treatment process of the present invention.
Embodiment
Embodiment 1
A kind of pulping papermaking sewerage treatment process may further comprise the steps:
1. the pulping papermaking sewerage in the water collecting basin is promoted to and carries out fiber recovery in the fiber recovery pond;
2. hydrolysis acidification pool is introduced in step water outlet 1., the residence time of sewage in hydrolysis acidification pool is 6～8h, and the acidication reaction takes place in this pond, and the suspended substance in the sewage is held back;
3. pre-treatment is carried out in step water outlet 2.;
4. will introduce in the anaerobic pond through pretreated sewage, and add nitrogen, phosphorus nutrition salt in anaerobic pond, and utilize anaerobion to carry out the degraded of organic pollutant, sewage is 8～12h in the residence time of anaerobic pond;
5. step water outlet is 4. introduced and is taken off in the steady pond, in taking off steady pond, add recombiner such as copper-ammonia activator, destroy in the sewage chromophore because of, improve the biodegradability of sewage, the reaction times of sewage in taking off steady pond is 90～120min;
6. the aerobe pond is introduced in step water outlet 5. and carry out aerobic treatment, dwell time of sewage is 22～24h;
7. second pond is introduced in step water outlet 6. and carried out mud-water separation, the surface load of second pond is 0.6-0.8m
3/ m
2.h;
8. with step water outlet 7. qualified discharge or enter clean water basin behind sterilization and disinfection, after the water pump pressurization, deliver to the reuse water pipe network.
In the present embodiment, in the process that sewage reacts in taking off steady pond, carry out limited aeration and water part and reflux, reflux ratio is 100%～200%, with the process of accelerated reaction.Described pre-treatment comprises elder generation introduced water outlet in the preaeration tank reacts, make sewage in this pond, carry out aeration and thorough mixing, remove the generation foamy tensio-active agent in the sewage, tensio-active agent has lipid acid and saponified, nonionic surface active agent thereof, resinous acid, alkyl-sulphate, sulfide etc., drive the hydrogen sulfide in the sewage simultaneously, and the sulfonium ion in the sewage is oxidized to elemental sulfur separates out; Afterwards, will precipitate in the sewage introducing mixed precipitation pond through the preaeration processing; In anaerobic pond, add microbial corrosion resistance and be not easy to stop up latticed polymer anaerobism filler and carry out microbial immobilizedly, adopt double-deck triphase separator to carry out the separation of gas, solid, liquid simultaneously, improve the processing efficiency of anaerobic pond; In addition, in the mixed precipitation pond, introduce the recirculation water of anaerobic pond,, in this pond, add lime simultaneously, quicken mud-water separation and produce calcium sulfate precipitation, for follow-up biochemical treatment creates conditions to reduce the dissolved oxygen in the sewage; In the aerobe pond, add cylindric polypropylene filler, form the mud embrane method, increase the length of biomass and biologic chain, improve its water outlet effect; The coagulating agent that adds in second pond is a polymerize aluminum chloride, and its dosage is 200～300mg/L; The flocculation agent that adds is a polyacrylamide, its dosage is 0.5～1.0mg/L, simultaneously, in sterilization pool, adopt strong oxidizer to the tail water sterilization that carries out disinfection, have the function of removing CODcr and colourity concurrently, make CODcr from 80～100mg/L be reduced to 60～80mg/L, colourity doubly is reduced to 8-16 times from 16-32; The strong oxidizer that adopts is dioxide peroxide or ozone, and adopting the duration of contact of dioxide peroxide is 15～25min, and adopting the duration of contact of ozone is 10～15min.
Described in the present embodiment hydrolysis acidification pool adopts suspended sludge layer structure, can give full play to the crown_interception of Sludge Bed like this.
With reference to Fig. 1, technical process of the present invention is as follows: pulping papermaking sewerage is introduced water collecting basin, by water pump sewage is promoted to the fiber recovery pond and carries out fiber recovery, gravity flow afterwards enters hydrolysis acidification pool, the hydrolysis acidification pool water outlet enters preaeration tank and pre-treatment is carried out in the mixed precipitation pond, send into anaerobic pond by water pump again, the anaerobic pond water outlet is taken off steady processing through taking off steady pond, make chromophoric group open, the biodegradability of sewage improves, its water outlet enters the aerobe pond and carries out the aerobic biochemical processing, enter second pond after the adding coagulating agent and the agent with fixed attention of flocculating and carry out mud-water separation, the water outlet in aerobe pond enters clean water basin behind contact sterilizing, deliver to the reuse water pipe network by force (forcing) pump.The mud that each workshop section produces drains into mud homogeneous concentration basin, and outward transport is disposed after the sludge dewatering equipment dehydration, delivers to into the mixed precipitation pond after liquid is collected after the overflowing liquid of mud homogeneous concentration basin and the filter of sludge dewatering equipment and handles.
A kind of device of implementing advanced treatment process for pulping papermaking sewerage, describedly take off steady pond and adopt the BAF structural shape, usually BAF comprises pond body, back-purge system etc., be provided with filter plate at Chi Tizhong, filtrate is layered on the filter plate, and filter is installed on filter plate, and the filtrate of filling among the present invention is a sponge iron, the density of sponge iron is 1.6～1.8t/m
3, diameter is 4～6mm, treatment sewage in taking off steady pond with effective duration of contact sponge iron be 90～120min.
Embodiment 2
A kind of pulping papermaking sewerage treatment process may further comprise the steps:
1. the pulping papermaking sewerage in the water collecting basin is promoted to and carries out fiber recovery in the fiber recovery pond;
2. hydrolysis acidification pool is introduced in step water outlet 1., the acidication reaction is taken place in this pond, and the suspended substance in the sewage is held back;
3. step water outlet is 2. introduced in the anaerobic pond, in anaerobic pond, added nitrogen, phosphorus nutrition salt, utilize anaerobion to carry out the degraded of organic pollutant;
4. pre-treatment is carried out in step water outlet 3.;
5. will introduce through pretreated water and take off in the steady pond, in taking off steady pond, add recombiner such as copper-ammonia activator, destroy in the sewage chromophore because of, improve the biodegradability of sewage;
6. the aerobe pond is introduced in step water outlet 5. and carry out aerobic treatment;
7. second pond is introduced in step water outlet 6. and carried out mud-water separation;
8. with step water outlet 7. qualified discharge or enter clean water basin behind sterilization and disinfection, after the water pump pressurization, deliver to the reuse water pipe network.
In the present embodiment, in the process that sewage reacts in taking off steady pond, carry out limited aeration and water part and reflux, reflux ratio is 100%～200%, with the process of accelerated reaction.Described pre-treatment comprises elder generation introduced water outlet in the preaeration tank reacts, make sewage in this pond, carry out aeration and thorough mixing, remove the generation foamy tensio-active agent in the sewage, tensio-active agent has lipid acid and saponified, nonionic surface active agent thereof, resinous acid, alkyl-sulphate, sulfide etc., drive the hydrogen sulfide in the sewage simultaneously, and the sulfonium ion in the sewage is oxidized to elemental sulfur separates out; In anaerobic pond, add microbial corrosion resistance and be not easy to stop up latticed polymer anaerobism filler and carry out microbial immobilizedly, adopt double-deck triphase separator to carry out the separation of gas, solid, liquid simultaneously, improve the processing efficiency of anaerobic pond; In the aerobe pond, add cylindric polypropylene filler, form the mud embrane method, increase the length of biomass and biologic chain, improve its water outlet effect; The coagulating agent that adds in second pond is a polymerize aluminum chloride, and its dosage is 200～300mg/L; The flocculation agent that adds is a polyacrylamide, its dosage is 0.5～1.0mg/L, simultaneously, in sterilization pool, adopt strong oxidizer to the tail water sterilization that carries out disinfection, have the function of removing CODcr and colourity concurrently, make CODcr from 80～100mg/L be reduced to 60～80mg/L, colourity doubly is reduced to 8-16 times from 16-32; The strong oxidizer that adopts is dioxide peroxide or ozone, and adopting the duration of contact of dioxide peroxide is 15～25min, and adopting the duration of contact of ozone is 10～15min.
Described in the present embodiment hydrolysis acidification pool adopts suspended sludge layer structure, can give full play to the crown_interception of Sludge Bed like this.
With reference to Fig. 2, technical process of the present invention is as follows: pulping papermaking sewerage is introduced water collecting basin, by water pump sewage is promoted to the fiber recovery pond and carries out fiber recovery, gravity flow afterwards enters hydrolysis acidification pool, the hydrolysis acidification pool water outlet enters anaerobic pond, the anaerobic pond water outlet is after pre-treatment is carried out in preaeration tank and mixed precipitation pond, by water pump water outlet is sent into again and taken off steady pond, take off steady processing through taking off steady pond, make chromophoric group open, the biodegradability of sewage improves, its water outlet enters the aerobe pond and carries out the aerobic biochemical processing, enter second pond after the adding coagulating agent and the agent with fixed attention of flocculating and carry out mud-water separation, the water outlet in aerobe pond enters clean water basin behind contact sterilizing, deliver to the reuse water pipe network by force (forcing) pump.The mud that each workshop section produces drains into mud homogeneous concentration basin pond, and outward transport is disposed after the sludge dewatering equipment dehydration, delivers to into the mixed precipitation pond after liquid is collected after the overflowing liquid of mud homogeneous concentration basin and the filter of sludge dewatering equipment and handles.
A kind of device of implementing advanced treatment process for pulping papermaking sewerage, describedly take off steady pond and adopt the BAF structural shape, usually BAF comprises pond body, back-purge system etc., be provided with filter plate at Chi Tizhong, filter is installed on the filter plate, filtrate is layered on the filter plate, and the filtrate of filling among the present invention is a sponge iron, and the density of sponge iron is 1.6～1.8t/m
3, diameter is 4～6mm, treatment sewage in taking off steady pond with effective duration of contact sponge iron be 90～120min.
Claims (6)
1. pulping papermaking sewerage treatment process may further comprise the steps:
1. the pulping papermaking sewerage in the water collecting basin is promoted to and carries out fiber recovery in the fiber recovery pond;
2. hydrolysis acidification pool is introduced in step water outlet 1., the acidication reaction is taken place in this pond, and the suspended substance in the sewage is held back;
It is characterized in that: this technology is further comprising the steps of:
3. pre-treatment is carried out in step water outlet 2.; Pre-treatment comprises earlier introduces preaeration tank with sewage, and sewage carries out aeration and thorough mixing in this pond, remove the generation foamy tensio-active agent in the sewage, drives the hydrogen sulfide in the sewage simultaneously, and the sulfonium ion in the sewage is oxidized to elemental sulfur separates out; Afterwards, will carry out precipitate and separate in the sewage introducing mixed precipitation pond through the preaeration processing;
4. will introduce in the anaerobic pond through pretreated sewage, in anaerobic pond, add nitrogen, phosphorus nutrition salt, and utilize anaerobion to carry out the degraded of organic pollutant;
5. step water outlet is 4. introduced and taken off in the steady pond, in taking off steady pond, make the lignin material take off surely, destroy chromophore in the sewage because of, the biodegradability of raising sewage; Describedly take off steady pond and adopt the BAF structural shape, stopping composition is a sponge iron; The density of sponge iron is 1.6～1.8t/m
3, diameter is 4～6mm, treatment sewage is 90～120min with effective duration of contact of sponge iron in taking off steady pond;
6. the aerobe pond is introduced in step water outlet 5. and carry out aerobic treatment;
7. second pond is introduced in step water outlet 6. and carried out mud-water separation;
8. with step water outlet 7. qualified discharge or enter clean water basin behind sterilization and disinfection, after the water pump pressurization, deliver to the reuse water pipe network.
2. pulping papermaking sewerage treatment process according to claim 1, it is characterized in that: introduce the part water outlet of anaerobic pond in the mixed precipitation pond, to reduce the dissolved oxygen in the sewage, simultaneously in this pond, add lime, quicken mud-water separation and produce calcium sulfate precipitation, for follow-up biochemical treatment creates conditions.
3. pulping papermaking sewerage treatment process may further comprise the steps:
1. the pulping papermaking sewerage in the water collecting basin is promoted to and carries out fiber recovery in the fiber recovery pond;
2. hydrolysis acidification pool is introduced in step water outlet 1., the acidication reaction is taken place in this pond, and the suspended substance in the sewage is held back;
It is characterized in that: this technology is further comprising the steps of:
3. step water outlet is 2. introduced in the anaerobic pond, in anaerobic pond, added nitrogen, phosphorus nutrition salt, utilize anaerobion to carry out the degraded of organic pollutant;
4. pre-treatment is carried out in step water outlet 3.; Pre-treatment comprises earlier introduces preaeration tank with sewage, and sewage carries out aeration and thorough mixing in this pond, remove the generation foamy tensio-active agent in the sewage, drives the hydrogen sulfide in the sewage simultaneously, and the sulfonium ion in the sewage is oxidized to elemental sulfur separates out; Afterwards, will carry out precipitate and separate in the sewage introducing mixed precipitation pond through the preaeration processing;
5. will introduce through pretreated water and take off steady pond, and in taking off steady pond, make the lignin material take off surely, destroy chromophore in the sewage because of, the biodegradability of raising sewage; Describedly take off steady pond and adopt the BAF structural shape, stopping composition is a sponge iron; The density of sponge iron is 1.6～1.8t/m
3, diameter is 4～6mm, treatment sewage is 90～120min with effective duration of contact of sponge iron in taking off steady pond;
6. the aerobe pond is introduced in step water outlet 5. and carry out aerobic treatment;
7. second pond is introduced in step water outlet 6. and carried out mud-water separation;
8. with step water outlet 7. qualified discharge or enter clean water basin behind sterilization and disinfection, after the water pump pressurization, deliver to the reuse water pipe network.
4. according to claim 1 or 3 described pulping papermaking sewerage treatment process, it is characterized in that: in the process that sewage reacts in taking off steady pond, carry out limited aeration and water part and reflux with the process of accelerated reaction.
5. according to claim 1 or 3 described pulping papermaking sewerage treatment process, it is characterized in that: in anaerobic pond, add the anaerobism filler and carry out microbial immobilized, adopt double-deck triphase separator to carry out the separation of gas, solid, liquid simultaneously, improve the processing efficiency of anaerobic pond.
6. according to claim 1 or 3 described pulping papermaking sewerage treatment process, it is characterized in that: in the aerobe pond, add cylindric polypropylene filler, form the mud embrane method, increase the length of biomass and biologic chain, improve its water outlet effect.
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| CN102161527A (en) * | 2010-12-22 | 2011-08-24 | 兰州交通大学 | Sponge iron-AT (Attapulgite)-PVF (Polyvinyl Fluoride) composite filler and application thereof on water treatment |
| CN102633404A (en) * | 2012-03-16 | 2012-08-15 | 山东天畅环保工程有限公司 | Treatment process for comprehensive wastewater |
| CN103466884A (en) * | 2013-09-12 | 2013-12-25 | 安徽省绿巨人环境技术有限公司 | Process for treating waste paper pulping and papermaking waste water |
| CN103553267A (en) * | 2013-10-12 | 2014-02-05 | 遵义县新昌纸业有限公司 | Zero-discharge treatment process of papermaking wastewater |
| CN103645291B (en) * | 2013-12-19 | 2015-05-13 | 重庆市渝西水务有限公司 | Method for detecting water discharging index of contact tank |
| CN103936234B (en) * | 2014-04-30 | 2016-01-27 | 李文 | A kind of domestic sewage processing system and treatment process thereof utilizing sun power |
| CN104261634B (en) * | 2014-10-17 | 2016-03-02 | 南宁金科环境工程有限公司 | A kind of wood-based plate Waste Water Treatment and technique |
| CN105948425B (en) * | 2014-10-24 | 2018-05-15 | 乾坤环保股份有限公司 | Papermaking wastewater treatment system |
| CN104692593A (en) * | 2015-02-28 | 2015-06-10 | 江苏高科物流科技股份有限公司 | Treatment method applied to industrial wastewater |
| CN105399268A (en) * | 2015-09-29 | 2016-03-16 | 贵州富泰凯纸业有限公司 | System and method of energy conservation and emission reduction for recycling sewage |
| CN106882905A (en) * | 2017-03-21 | 2017-06-23 | 东华大学 | A kind of garbage leachate wastewater advanced treatment system |
| CN107285568A (en) * | 2017-07-24 | 2017-10-24 | 浙江富阳华天纸业有限公司 | A kind of pulping wastewater treatment method of low foul smell discharge |
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Assignee: Huatian Nanjing Engineering & Technology Corporation, MCC Assignor: Zhongye Huatian Engineering Technology Co., Ltd. Contract record no.: 2011320000561 Denomination of invention: Process and apparatus for treating wastewater from pulping papermaking Granted publication date: 20100818 License type: Exclusive License Open date: 20090513 Record date: 20110415 |
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