CN101781057B - Treatment method of waste papermaking water - Google Patents
Treatment method of waste papermaking water Download PDFInfo
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- CN101781057B CN101781057B CN2009100012718A CN200910001271A CN101781057B CN 101781057 B CN101781057 B CN 101781057B CN 2009100012718 A CN2009100012718 A CN 2009100012718A CN 200910001271 A CN200910001271 A CN 200910001271A CN 101781057 B CN101781057 B CN 101781057B
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Abstract
The invention relates to a treatment method of waste papermaking water, which comprises the steps of filtration, UPCB treatment, biochemical treatment and deep treatment. Because the UPCB process is adopted in the treatment method of the invention, the waste water treatment cost is greatly reduced, the waste water treatment efficiency is effectively improved, and the whole technical process is simple and can be implemented easily. The method of the invention can be used for treating various kinds of waste papermaking water, particularly the middle section waste water with high load, and in addition, satisfactory results can be obtained. The treated waste water can reach the national specified discharge standard.
Description
Technical field
The present invention relates to a kind of technological process of treating papermaking method, particularly relate to a kind of purifying treatment method of papermaking midcourse wastewater.
Background technology
The whole process of production of pulp and paper industry needs a large amount of water; These water have compiled a large amount of industrial objectionable impuritiess in process of production, both can't directly utilize, and directly discharging pollutes the environment again; Therefore; The waste water that each stage of pulping and papermaking processes is produced carries out recycling, and remarkable economical and social value are arranged, and is determining the survival and development of papermaking enterprise.
In paper industry, adopt treatment process centering water such as chemical precipitation, air supporting processing and bio-oxidation to handle usually.
Papermaking environmental protection one-level processing traditional technology is just heavy or materialization flocculation sediment at present; The flocculation process clearance is higher; Especially can remove the organic pollutant of a large amount of polymer difficult degradations; This lays a good foundation for next step carries out biochemical treatment, yet such processing is only applicable to the lower waste water of loading.European countries are the most advanced on materialization is handled, and eliminated horizontal sedimentation tank basically, adopt the advanced precipitation technology of plusator, sludge blanket clarifier and highly dense settling pond or the like.
Microbial film ultra-filtration technique, r-o-, electrodialysis, ion exchange treatment means constantly occur in recent years.In paper industry, because processing cost is too high, owing to the paper waste complicated component, the treatment technology difficulty is very big, therefore, does not still have industrialized ripe treatment technology to use so far on the other hand on the one hand.
For example, CN101186418A has disclosed a kind of recoverying and utilizing method of paper-making industrial waste water, and this method combines membrane technique and Treatment of Industrial Water technology, and concrete grammar comprises: micro-filtration process section, ultrafiltration technology section and reverse osmosis membrane process section.Because before the micro-filtration process section, need at first carry out biochemical treatment, the ultrafiltration technology section need adopt ultra-filtration membrane, the reverse osmosis process section need adopt reverse osmosis membrane.Therefore, cost of water treatment is too high, and in addition, the requirement to water in the implementation process of this method is quite strict, therefore, for the paper waste complicated component is changeable, is difficult to industriallization.
CN1255340C has disclosed the decoloring method of water in a kind of papermaking, adopts oxygen, dioxide peroxide, and flocculation agent handles the middle water through biochemical treatment respectively, with obtain can reuse purify waste water.Yet this method need be used dioxide peroxide, itself is exactly a kind of chemical agent of forbidding gradually at present.This method needs long sedimentation, long processing period in addition.
CN101050044A has disclosed and a kind of papermaking wastewater has been carried out the method for advanced treatment, comprises chemical coagulation, gravitational settling, and composite filtering material filters, and the biological adsorption agent absorption degradation purifies or the oxygenant oxidation, etc. step.Wherein chemical coagulation has adopted traditional flocculation agent such as aluminium salt and/or molysite, and SEPIGEL 305 (PAM).Owing to do not carry out desalting treatment, therefore, increased the composite filtering material filtration in this method; And purification of biological adsorption agent absorption degradation or oxygenant oxidation, not only increased processing cost, but also made complex disposal processization; Operability variation in implementation process, treatment effect is undesirable.
CN1203231C has disclosed a kind of method of papermaking straw pulp WWT, comprises that interpolation flocculation agent (compound aluminum chloride) and coagulant aids (SEPIGEL 305) carry out flocculation sediment and handle, and carries out air supporting then and handles, and clear water directly discharges or reuse.Because soluble salt content is very high in the waste water, adopts simple flocculation sediment not remove, therefore, certainly, the middle water of handling through this method does not reach the direct discharging of present national regulation or the standard of reuse.
CN100357191C has disclosed the decoloring method of water in a kind of papermaking, comprises adding white clay and flocculation agent among the Xiang Zhongshui, adsorbs to reach through slag then and reduces the COD and the purpose of decolouring.This method is not still handled water-soluble salts a large amount of in the waste water, therefore, is difficult to reach the emission standards of present national regulation.
CN1057512C has disclosed a kind of improvement method of paper waste, comprises adding acidifying to isolate xylogen; Utilize coal grain and iron dust filtration organism and solid particulate; Add milk of lime and carry out flocculation sediment; Adding flocculation agent again carries out flocculation sediment with milk of lime and separates.Because black liquor and middle water are mixed, therefore, this method needs a large amount of acid to carry out the acidifying separating lignin, has lost a large amount of bronsted lowry acids and bases bronsted lowries artificially.In addition, used a large amount of coal grain and iron filings, and milk of lime, with producing a large amount of secondary pollutions.Moreover, owing to water-soluble salt is not wherein handled, make final process result undesirable, be difficult to reach national specified discharge standard.
In the above-mentioned prior art, quite a few adopts simple flocculation sediment to handle, and isolates throw out then; Clear water directly discharges or reuse; Still can use for the lower waste water of load, higher for load, for example; By the middle-stage wastewater that pulping process of straw pulp produces, above-mentioned treatment process is difficult to reach national specified discharge standard.Also have some treatment processs to adopt flocculation sediments, (biology) adsorption filtration, or the like step, will produce a large amount of secondary pollutions in the treating processes, in addition, treating processes is too complicated, therefore, cost will improve greatly.The prior art that has has adopted ultrafiltration membrane technique and reverse osmosis membrane to combine with conventional method of wastewater treatment, in theory should thoroughly decontamination problem.But owing to the cost reason; And technical reason; Be that the papermaking midcourse wastewater complicated component is changeable, on Processing Paper Wastewater, not only brought the high problem of cost for ultrafiltration membrane technique and reverse osmosis membrane technology, technical meeting runs into beyond thought trouble when handling but also make.Therefore, it is high to solve the cost that exists in the prior art, and the processing means are complicated, cause serious secondary pollution problem again, is the cardinal task that current paper waste is handled, and can paper waste be handled and accomplished smoothly, determined the survival and development of papermaking enterprise.
Summary of the invention
To the problems referred to above of prior art, the inventor has accomplished the present invention through concentrating on studies.Promptly the present invention proposes and a kind ofly can reduce processing cost effectively, simplify technological process greatly, and can handle various paper wastes, the particularly treatment process of high loading middle-stage wastewater.
The object of the present invention is to provide a kind of technological process of treating papermaking method, comprising: filter, flocculation sediment, biochemical treatment step, and advanced treatment step is characterized in that, flocculation sediment adopts UPCB technology.
Said UPCB technology comprises: the hybrid reaction layer of the waste water of thorough mixing flocculation agent at first being introduced the UPCB reactor drum; In waste water, add hold concurrently oxygen, aerobic, circulating sludge at hybrid reaction layer and the intersection of strengthening responding layer then; Strengthen after the responding layer reaction; In waste water, add or do not add flocculation agent, and make waste water get into UPCB adsorption filtration layer.
Preferably, the effect through lift pump and pipeline makes flocculation agent and waste water thorough mixing before waste water gets into UPCB hybrid reaction layer.
In the method for the invention, preferably, after UPCB adsorption filtration layer, in waste water, add coagulant aids, its addition is 0.2-5ppm in the gross weight weight of waste water.
In the method for the invention, wherein said double oxygen, addition aerobic, circulating sludge are counted 30-60% with the gross weight of waste water.
The addition of the flocculation agent that wherein at first adds in the method for the invention, is counted 50-600ppm with the gross weight of waste water
In the method for the invention, the said micro-filtration that is filtered into, the order number of filter screen is from the 80-120 order.
In the method for the invention, also comprise in addition handling the advanced treatment step of waste water.
In the prior art, mainly there is following weakness in traditional materialization treatment process:
When 1, coming the fluctuation of water water quality, the water yield big, go out water unstable after causing treatment system to be impacted, and brought big difficulty for the control that adds dose.
2, raw water quality is poor, and SS is higher, colloidalmaterial more for a long time, especially paper machine coating water (plain boiled water) SS can reach more than 4000, wanting to reach better water outlet certainly will will increase amount of medicament.
3, only have that the deposition net is caught, the effect of adsorption bridging, polarity charge neutrality, can only remove macrobead SS, cause efficient on the low side, the medicine consumption is high, problems such as cost height.
4, density is little behind the flco binding fiber, is not easy deposition, and mud-water separation is slow.
To above problem; We through experimental development repeatedly a kind of advantage of having concentrated Vortex reactor (1), Cyclonic reactor (2), orifice plate reactor drum (3), in reaction process, incorporate the hold concurrently novel process of oxygen anaerobic digestion effect (6) of mud circulating technology (4), mud contact percolation technology (5) and mikrobe again.
Fig. 1 is seen in its concrete technical process
Shown in technical process, for water collecting basin, can adopt the water collecting basin of conventional design in the prior art, to its structure, shape etc. have no particular limits.Those of ordinary skills can carry out suitable change and adjustment as required.And these changes and adjustment all fall within the scope of the present invention, and this is conspicuous for those of ordinary skills.
Preferably, store volume more than 20 minutes when water collecting pool volume is maximum amount of water, and the perforation blast main is set in the bottom or stirs water pipe, be prone to hypostasis matter deposition to avoid big density such as earth, talcum powder.For adding snack made with traditional Chinese medicines a, can add normally used flocculation agent, those of ordinary skills can select suitable flocculation agent as required, and this is conspicuous for those of ordinary skills, need not to make creative work.Described flocculation agent for example comprises liquid flocculation agent (PAC, PAFC, PSAC, PSFAC etc.).
Before adding snack made with traditional Chinese medicines a and being positioned at lift pump, adding consistency 1-10%, preferred 3-6%.Have no particular limits for its addition manner, negative pressure sucks before for example can adopting the adding of Fluroplast-4 pump or utilizing pump.
For making the flocculation agent thorough mixing, after adding flocculation agent, can take mixing means commonly used in the prior art, for example increase lift pump and pipeline, so that power is provided, flocculation agent is issued to thorough mixing with pipeline high flow rate turbulent flow under the brute force of pump impeller stirs.
At first get into the hybrid reaction layer of UPCB reactor drum behind the waste water thorough mixing.The waste water that has mixed medicament gets into circular UPCB reactor bottom along tangent line, and upwards goes the 15-45 degree partially.Make water in this district and even full response device, keep the eddy flow state.As required, can be provided with in this district and revolve devices such as mixed flow reactor, orifice plate reactor drum, so that keep the eddy flow state.
Add snack made with traditional Chinese medicines b and be positioned at the hybrid reaction layer and strengthen the responding layer junction, this point is used to add anaerobism, double oxygen, good supporting and the materialization floc sludge on the reactor center axis.Mud for being added has no particular limits, as long as it can play above-mentioned effect.Those of ordinary skills adopt conventional technique means can select suitable mud as required, and said selection is conspicuous to those skilled in the art, need not to make creative work.Add snack made with traditional Chinese medicines b apart from the distance of the reactor bottom size according to reactor drum, those of ordinary skills only need should confirm through simple test, need not creative work.
UPCB strengthens responding layer and is positioned at the reactor drum middle part, includes internal circulation system, hydraucone guide shell, radial lamella, whisking appliance, doser, drainage plate etc.Sewage is realized the abundant reaction with flocculation agent in this district.
Preferably; At this district's microbe inoculation; Said mikrobe is the mikrobe of produce in the enterprises in pulp and paper industry wastewater treatment process aerobic, anaerobism or double oxygen, so that increase flco density, improves flco concentration and generally can be controlled in 1500-10000mg/L; Make that flocculation, polarity charge neutrality, deposition net are caught, the more performance of plus depth of adsorption bridging effect, the enhanced flocculation reaction effect.Said microbe inoculation is conspicuous for those of ordinary skills, need not to make creative work.
Can set up or not set up and add snack made with traditional Chinese medicines c, this adds snack made with traditional Chinese medicines and is positioned at the reinforcement reaction zone, and this top is whisking appliance, adds normally used flocculation agent or coagulant aids at this.Kind those of ordinary skills of flocculation agent or coagulant aids should confirm through simple test.This is conspicuous for those of ordinary skills.For example add snack made with traditional Chinese medicines c and can add PAM.Its addition is generally the 0.5-2ppm of pending waste water gross weight.
UPCB adsorption filtration layer is positioned at reactor drum top, mainly comprises rising pipe, flow deflector, doser, filtering net whisking appliance etc.This layer middle and upper part forms certain thickness sludge filtration layer in operational process; It is in the moving state of semi-fluid, can dam to fail to form the tiny SS of flco in a large number at the reinforcement reaction zone, and be boundary with the filtering net; Online is mud mixture flowing reactive district, the high dense sludge filtration of position suspension off the net district.Filtering net can adopt 20-40 purpose nylon, polyester or stainless (steel) wire or the like.The thickness of sludge blanket is with reactor used size variation.But in the industrial implementation process, consider the size of common equipment, the thickness of said sludge blanket is usually between 1-2 rice.
Preferably, set up and add snack made with traditional Chinese medicines d, further add coagulant aids, make flco more closely knit at this point, bigger, make water more clear.Said coagulant aids be this area normally used those, those of ordinary skills should confirm through simple test, this point add dose preferably at 0.2-5ppm.
The reactor drum water outlet flows into settling tank and carries out mud-water separation; And anaerobism takes place in settling tank, biological respinses such as the oxygen of holding concurrently, hydrolysis; Make pollutent such as xylogen, the tannin etc. of difficult degradation The dissolved obtain the chain rupture decomposition, become micromolecular short chain organism, for subsequent processing is handled the condition that provides.
In order better round-robin mud to be removed, preferably hydraulic detention time was controlled between 4-10 hour, the residence time, too short biological effect was not obvious, and long mud floats easily.
This reactor drum is removed ss and colloid, makes the macrobead pollutent in the water be able to remove, and double oxygen anaerobic hydrolysis-acidification reaction has to a certain degree taken place.Make that processing such as anaerobic-aerobic subsequently are easier to carry out if necessary.
UPCB technology is that the contriver passes through big quantity research, approximately lasts 3 years, and the conventional one-level of developing that can replace is handled technologies such as materialization flocculation, can be used as the treatment process that integrates physical reaction, chemical reaction, biological respinse of tertiary treatment facility again.
Adopting UPCB technology that waste water is carried out the Treatment Technology advantage is:
1, stable effluent quality.
(1) owing to added the anaerobism oxygen bacterium of holding concurrently, the mud internal recycle effect strengthening reaction zone has strengthened sludge concentration, has improved shock-resistant ability.
(2) use the UPCB reactor drum, improved the service efficiency of medicine, thereby improved clearance.
(3) increased the contacted filtering layer of mud, contacted filtering layer is positioned at reactor drum top, and a large amount of mud combine with filtering net to form filtering layer at this place, have more effectively removed suspended substance.
2, improved clearance
(1) because the development and use of UPCB reactor drum have improved processing efficiency, optimized the condition of flocculation reaction, hybrid reaction is fully rapid, and has formed mud internal recycle and sludge filtration adsorption layer, has improved clearance.
(2) in reaction process, introduced biological action, promptly added double oxygen anerobes, made settling tank in the effect of performance mud-water separation, also play the effect of acidication.
(3) in flocculation reuse a large amount of mud, improved reaction efficiency.
(4) introduce contact percolation, contacted filtering layer is positioned at reactor drum top, and a large amount of mud combine to form filtering layer at this place with filtering net.Mud forms the thick mud layer of about 1-2 rice because self gravitation and buoyancy of water and up-flow power waterborne, filtering net resistance reach balance in the current uphill process, reached the good adsorption filteration, and it is more thorough that SS is removed.
3, reduced running cost
(1) owing to adopted UPCB technology, improved sludge concentration, adopted conventional flocculation,, guarantee that water outlet just must increase dose, causes cost higher so do not reach good effect because of not reaching enough flco density.
(2) improved reactive mode, increased the reaction times, improved original unreasonable response behaviour, made reaction more abundant, more efficient, thus reduce the medicine consumption, improve effluent quality.
(3) increased mud contact percolation mechanism, improved clearance, existing technology has only flocculation sediment mechanism, does not have filtration mechanism, absorb after this technology can be further reduction medicine usage quantity, increase water quality.
The existing system priming cost can reduce by 0.5 yuan/cube, and only legacy system becomes can realize this year to practice thrift 12000 * 0.5 * 360=2160000 unit.New system and middle water reuse priming cost can reduce by 0.3 yuan/cube, can realize practicing thrift 60000 * 0.3 * 360=64800000 unit year.All implement year can practice thrift 8,640,000 yuan.
(4) improved excess sludge concentration, the sludge dewatering expense is reduced.
Specifically, the UPCB reactor drum should be used in combination with waste water lift pump, pipeline, settling tank, has played effects such as removal SS, reduction COD, raising wastewater biodegradability.
In order to reduce hydraulic loss, the UPCB reactor drum preferably adopts circle, is divided into three layers: hybrid reaction layer, reinforcement responding layer, adsorption filtration layer.Mainly make medicament and the rapid thorough mixing of sewage at the hybrid reaction layer; Strengthen responding layer through the eddying flow reaction with the mud internal recycle, add the oxygen anerobes of holding concurrently and make sludge concentration improve, increase flco density has improved the removal ability of suspended substance; At adsorption filtration layer (or claiming contacted filtering layer), contacted filtering layer is positioned at reactor drum top, and a large amount of mud combine to form filtering layer at this place with filtering net.Mud forms the thick mud layer of about 1-2 rice because self gravitation and buoyancy of water and up-flow power waterborne, filtering net resistance reach balance in the current uphill process, reached the good adsorption filteration.
In microfiltration step of the present invention, can adopt filtering technique conventional in the prior art, so that remove silt particle, fiber, part xylogen, pigment or the like, when removing a large amount of solid substances (SS), can also reclaim slurry.
Preferably, adopt rotary Microfilter to filter, select 80-120 purpose steel mesh or nylon wire for use, the slurry that recovery obtains preferably is concentrated into 2% (weight) and returns pulping system, and waste water is after filtering controlled its SS less than 800mg/L.
Waste water after filtering still contains silt, for reducing the reuse cost, improves quality of reused water, guarantees the normal operation of follow-up equipment, preferably waste water is carried out desanding and handles.Can adopt desanding means commonly used in the prior art, this is conspicuous for those of ordinary skills.
Usually adopt settling pit to carry out sand setting and handle, the sediment outflow at intermittence is carried out in the bottom, and supernatant carries out step of flocculation precipitation.
It in the present invention, has no particular limits, can adopt flocculation agent commonly used in the prior art, as long as can reach the purpose of flocculation sediment for the flocculation agent that is adopted.
In the present invention,, can also add coagulant aids in order to reach better flocculation sediment effect, same, have no particular limits for the use of coagulant aids, as long as can reaching, it helps the purpose of coagulating.For example can adopt SEPIGEL 305 coagulant aids commonly used or the like.
In advanced treatment workshop section, add the decolouring medicament to waste water, through materialization and oxygenizement, make the color removal in the waste water, remove partial organic substances simultaneously, water outlet is directly discharged.Through the waste water of disposal methods of the present invention, its index far below " Shandong Province's paper industry pollution discharge standard " (DB37/336-2003) and is lower than external wood pulp plant effluent index.
The evaluation of UPCB technology actual effect:
The removal effect of UPCB technology
The last effect of table 8UPCB technology
Through method of wastewater treatment of the present invention, the reclamation rate of waste water reaches more than 60%.
Description of drawings
Below in conjunction with accompanying drawing technical process of the present invention is described:
Fig. 1 be in the inventive method the UPCB treatment process synoptic diagram.
Among Fig. 1, paper waste at first passes through microfiltration systems, gets into water collecting basin then, and adds flocculation agent.Under the effect of lift pump and pipeline, make its thorough mixing afterwards.Get into the hybrid reaction layer of UPCB reactor drum then.
Preferably, before waste water carries out water collecting basin, filter, get into settling pit then and carry out the sand setting processing, so that remove silt particle, fiber, part xylogen, pigment or the like.Carry out sand setting with settling pit and handle and all adopt processing mode commonly used in the prior art filtering, those of ordinary skills can carry out appropriate selection as required, and these selections all belong to the scope of conventional design, need not to make creative work.
Then, add hold concurrently oxygen, aerobic, circulating sludge at hybrid reaction layer and reinforcement responding layer intersection, so that carry out sufficient flocculation sediment.
Then, to wherein adding or do not add flocculation agent.And behind UPCB adsorption filtration layer, in the water of settling tank, add coagulant aids, so that carry out flocculation sediment more fully, and the more easily separated supernatant that obtains.
Fig. 2 is the synoptic diagram that paper waste of the present invention is handled.
Fig. 3 and Fig. 4 are the structural representation of UPCB reactor drum used among the present invention.
Embodiment
Embodiment 1
The lab beaker test: (120 mesh standard sieves that adopt the laboratory to use carry out pre-treatment, remove slurry for COD:2890mg/L, SS:2060mg/L) 5000mL to get the pulping and paper-making middle section water.Get the traditional materialization treatment process of filtrate 1000mL simulation then and carry out the beaker test.
At first in water, add 850ppm medicament a, the powerful stirring 10 minutes, the tiny flco of macroscopic formation adds 3ppm medicament c then, and middling speed stirred 3 minutes, visible a large amount of closely knit alumen ustum, and deposition is rapidly.Staticly settled 30 minutes.Observe supernatant for being yellow, transparence.Get its supernatant and measure COD:1564mg/L, SS:260mg/L.
Embodiment 2
The lab beaker test: (120 mesh standard sieves that adopt the laboratory to use carry out pre-treatment, remove slurry for COD:2890mg/L, SS:2060mg/L) 5000mL to get the pulping and paper-making middle section water.Get filtrate 1000mL simulation UPCB technology then and carry out the beaker test.
At first in water, add 500ppm medicament a, the powerful stirring 7 minutes then adds the microbial strains b of 300mL through taming; Middling speed stirred 3 minutes, and is macroscopic to forming great quantity of floc, adds 2.5ppm auxiliary agent c then; Middling speed is stirred to and and then adds 2.5ppm auxiliary agent d after floc sedimentation increases; Middling speed stirred 2 minutes, a large amount of closely knit alumen ustum of visible formation this moment, and sedimentation speed is fast.After leaving standstill 30 minutes, can be observed supernatant and be light yellow, transparence.Get its supernatant and measure COD:1386mg/L, SS:200mg/L.
Embodiment 3
The production pilot scale: (COD:3000mg/L, SS2170mg/L) 50 sides filter (filtering net is 120 order polyester webs) through Microfilter, reclaim slurry to get the pulping and paper-making middle section water.Get into the desilting system then and stopped 1 minute, remove silt.Supernatant gets into the UPCB retort, and to add concentration be 5% medicament a to the mode of dosing before the ingress of jar takes pump, and to add concentration be the anaerobism of the 5000-7000ppm oxygen bacterium of holding concurrently at the trunnion place at the bottom of jar, carries out flocculation reaction.Mud mixture gets into strengthens reaction zone after about 5 minutes, adds 3-5ppm medicament c according to response situation, and through the adsorption of adsorption filtration layer, mixed solution gets into settling system.Sewage is through staticly settling, and dirty supernatant gets into following one biochemical treatment workshop section.
Get settling tank supernatant observation color and be faint yellow, transparent.Its COD is 1432mg/L, SS:210mg/L.
Comparative Examples:
Comparative Examples 1 and instance 2, identical pulping system waste water (COD:2890mg/L, SS:2060mg/L), adopt different process to handle.Index of correlation sees the following form:
Can be found out by simultaneous test, adopt UPCB art breading sewage, the more traditional materialization of added amount of chemical is handled few, and the clearance of COD, SS is improved accordingly, and the sewage color shoals, and helps follow-up biochemical treatment.
More than combine embodiment and accompanying drawing that the present invention has been carried out more detailed explanation.For simplicity, only water in the papermaking is carried out among the embodiment.Yet those of ordinary skills should be understood that, so long as the waste water salt content is higher, in the time of should not passing through simply to handle reuse, all can adopt method of the present invention to handle.Therefore, the processing of water during treatment process of the present invention is not limited only to.Under spirit of the present invention, those of ordinary skills can carry out suitable change or change to method of the present invention as required, and these changes and change all fall within the scope of the present invention.Protection scope of the present invention is as the criterion with appending claims.
Claims (8)
1. a technological process of treating papermaking method comprises: filter flocculation sediment; Biochemical treatment step, and advanced treatment step is characterized in that; Flocculation sediment adopts UPCB to handle, and described UPCB handles and adopts the UPCB reactor drum, and described reactor drum adopts circular; Be divided into three layers: hybrid reaction layer, reinforcement responding layer, adsorption filtration layer make medicament and the rapid thorough mixing of sewage at the hybrid reaction layer; Strengthen responding layer through the eddying flow reaction with the mud internal recycle, add the oxygen anerobes of holding concurrently and make sludge concentration improve, increase flco density has improved the removal ability of suspended substance; The adsorption filtration layer is positioned at reactor drum top; A large amount of mud combine to form filtering layer at this place with filtering net; Mud is in the current uphill process; Form the thick mud layer of 1-2 rice because self gravitation and buoyancy of water and up-flow power waterborne, filtering net resistance reach balance, reached the good adsorption filteration.
2. method according to claim 1; Said UPCB handles and comprises: the hybrid reaction layer of the waste water of thorough mixing flocculation agent at first being introduced the UPCB reactor drum; In waste water, add hold concurrently oxygen, aerobic, circulating sludge at hybrid reaction layer and the intersection of strengthening responding layer then; Strengthen after the responding layer reaction, in waste water, add or do not add flocculation agent, and make waste water get into UPCB adsorption filtration layer.
3. method according to claim 1 and 2, the effect through lift pump and pipeline before waste water gets into UPCB hybrid reaction layer makes flocculation agent and waste water thorough mixing.
4. method according to claim 3 is added coagulant aids in waste water after UPCB adsorption filtration layer, its addition is 0.2-5ppm in the gross weight weight of waste water.
5. method according to claim 2, wherein said double oxygen, addition aerobic, circulating sludge are counted 30-60% with the gross weight of waste water.
6. method according to claim 3, the addition of the flocculation agent that wherein at first adds is counted 50-600ppm with the gross weight of waste water.
7. according to claim 1-2, each described method of 4-6, the said micro-filtration that is filtered into, the order number of filter screen is from the 80-120 order.
8. method according to claim 7 comprises that also the mud to UPCB and biochemical treatment generating step carries out sludge dewatering treatment.
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