CN101805092A - New process for treatment of APMP pulp-making wastewater - Google Patents
New process for treatment of APMP pulp-making wastewater Download PDFInfo
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- CN101805092A CN101805092A CN201010116595A CN201010116595A CN101805092A CN 101805092 A CN101805092 A CN 101805092A CN 201010116595 A CN201010116595 A CN 201010116595A CN 201010116595 A CN201010116595 A CN 201010116595A CN 101805092 A CN101805092 A CN 101805092A
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Abstract
The invention provides a new process for treatment of APMP pulp-making wastewater. The new process is applicable to comprehensive wastewater produced by using raw materials of poplar, eucalyptus and a variety of fast-growing timbers for producing pulp with high yield by adopting the APMP or the PRC-APMP pulp-making process. The new process is different from the traditional treatment process, aspergillus niger is adopted for directly carrying out biological pretreatment on the pulp-making waste liquid without the pretreatment, then the flocculation treatment technology is adopted for further reducing COD and suspended substances, the absorption-flocculation role of biological pretreatment thalli is fully utilized for improving the overall treatment effect, and the flocculation treatment is carried out by adopting polyaluminium chloride and polyacrylamide. Most of the waste liquid can be reused in process steps of material preparation, pulp washing, papermaking and the like after the biological pretreatment and the flocculation treatment, if the waste liquid needs to be drained, the deep treatment still needs to be carried out, the deep treatment can adopt absorption-flocculation, wet oxidation, catalytic oxidation, membrane treatment and other technologies for carrying out treatment, and the waste liquid can be drained after achieving the standard.
Description
Technical field:
The invention belongs to the Industrial Wastewater Treatment field, relate in particular to a kind of treatment process method of APMP pulp-making waste-water.
Background technology:
AMPM method pulping process is the patented technology of the early 1990s in last century U.S. SPROUT-BAUER company exploitation, and its cardinal principle is with the high compression ratio spiral raw material to be carried out extrusion process before defibrination, strengthens soup and soaks into, and promptly adds H then
2O
2Carrying out bleaching action with pharmaceutical chemicalss such as NaOH, thereby save a series of equipment of bleaching again behind defibrination, is one of the pulping process that integrates the state-of-the-art high yield pulp of chemical treatment and mechanical treatment.Multiple advantage such as the APMP method has that power consumption is low, pulp brightness is high, paper pulp fiber is long, low in the pollution of the environment, reduced investment, floor space are little is particularly useful for leaf wood slurrying.China spells out in Eleventh Five-Year Plan and will develop a circular economy economizing on resources as fundamental state policy, preserves the ecological environment, and accelerates to build a resource-conserving and environment-friendly society, and promotes economic development and population, resource, environment coordination.Wherein high yield cooking and water saving etc. are exactly one of resource-effective practice of China's pulp and paper industry.In recent years, the high yield cooking particularly development and use of technology such as APMP, PRC-APMP had improved the utilization ratio of fibrous material, had directly reduced the consumption of fibrous material, had become the main method of high yield cooking in the world.Because it is relatively low that this method has the contaminated wastewater thing load that pulping yield height, process discharge, also become the developing direction of China's slurrying and will obtain applying more and more widely in the coming years.With the fast growing wood is raw material, and adopting the APMP pulping technique to produce high yield pulp has become one of the fastest slurry kind of development in recent years.
Although the contamination level that produces in high yield cooking such as APMP, the PRC-APMP process greatly reduces than general chemistry pulping process, but different with chemical pulp factory is, high yield pulp factory does not generally have pharmaceutical chemicals to recycle facility, in slurrying and the bleaching process from timber the material of stripping all enter waste water, and the composition more complicated of waste water (organism mainly comprises lignin degradation product, resinous acid, lipid acid, phenols, alkanes and phthalate etc.).When being raw material production APMP slurry with the living leaf wood of speed, its wastewater discharge is generally 20-30m
3/ t slurry, BOD
5Be respectively 20-100kg/t slurry and 60-250kg/t slurry with COD, and with a large amount of suspended substances, solvability colloidalmaterial and darker color, the COD of APMP slurry factory waste water
CrCan reach 5000-20000mg/l, BOD
5Then be the 30%-45% of COD, belong to organic wastewater with high concentration, and contain multiple toxic organic compound and comprise the RFA big (resin and fatty acids) material hydrobiont toxicity, directly being discharged into rivers and lakes must cause serious water to pollute, and organic content does not wherein also reach effectively pollution treatment means---the useful energy self-sufficiency that Silvola recovery is required at present, therefore, must take other measure that it is effectively administered.
At present, both at home and abroad two kinds of approach of the general employing of processing of such waste water are handled, the one, adopt the biological treatment mode, the 2nd, adopt the minimizing technology that waste liquid is handled.Wherein biological method especially activated sludge process use at most, the minimizing technology also is in experiment and research and development stage mostly except that the minority application example.
Apply to and produce the mesophytization treatment process, the pattern of adopt " pre-treatment+biological treatment of (flocculation) precipitation " or (flocculation) precipitation pre-treatment+biological treatment+advanced treatment more.Because high yield cooking is different from the chemical pulping technology, the pulping process is mainly still finished by mechanical forces, therefore SS class substances content is higher in the waste liquid, therefore before biological treatment, be the stabilizing treatment system, minimizing is to the influence of biological treatment system mud, and many isolation technique that adopt are earlier removed a large amount of SS material in the waste water.Particularly the treatment process of anaerobism+aerobic pattern is adopted in biological treatment.At the most frequently used separation method is that precipitation and air supporting mode are removed suspended substance in the waste water.The employing settling process on average can be removed the suspended matter more than 80%, adopts dissolved air flotation to handle, and the TSS clearance can reach 65%～95%.Traditional biological is handled the processing modes that adopt the combination of anaerobic and aerobic microorganism more, and anaerobic treatment wherein is commonly used at present two kinds of UASB and IC anaerobic reactors.The aerobic treatment method has activated sludge process, biomembrance process, bio-contact oxidation, biological fluidized bed etc., and wherein the most frequently used is activated sludge process.
Because the pulp-making waste-water pollutant load is higher, load is big, and contain the large number of biological difficult degradation than macromolecular substance, as lignin and derivative thereof, after flocculation and biological treatment, waste water is difficult to satisfy the emission standard of increasingly stringent, for making wastewater to reach standard, some advanced treatment become research emphasis, use at present technology such as immobilized biotechnology, wet oxidation, film processing, flocculation, adsorption treatment are arranged, main purpose is to remove macromole bio-refractory organism, and these materials are how relevant with the colourity of waste water.
Except traditional biologic treating technique, for consideration to aspects such as wastewater zero discharge and recycles, abroad for mechanical repeated compression evaporation technique, freezing and crystallizing, evaporation, ultrafiltration, flotation, distillation and the reverse osmosis isolation pollutants in waste water of high yield cooking waste water, these all are industrialized technology.But these technology also do not reach large-scale application at present.
Adopt single bacterial strain some reports also to be arranged to what pulping waste liquor fermented Transformation Application, but adopt aspergillus niger S13 bacterial strain, do not carrying out the pre-treatment of directly fermenting under the pre-separation disposition, and then employing flocculation treatment technology, further reduce COD and suspended matter, and can make full use of the adsorption-flocculation effect of Biological Pretreatment thalline, improved the overall process effect.Utilizing aspergillus niger directly APMP waste water to be carried out Biological Pretreatment does not also report at present.Conventional biological treatment mostly is flocculation (precipitation) processing+biological treatment, and Biological Pretreatment+flocculation treatment is also less to be seen, and adopts aspergillus niger Biological Pretreatment+flocculation treatment process combination more not appear in the newspapers.
Summary of the invention
The invention provides the New Process for Treatment of APMP pulping waste liquor.Be applicable to the comprehensive wastewater that poplar, Eucalyptus and various fast growing wood raw material adopt APMP, PRC-APMP pulping process to produce.
The technological line that adopts is his pre-treatment of not advanced Xingqi, directly carry out Biological Pretreatment, and then carry out flocculation sediment and handle, processed waste water can be used for getting the raw materials ready, pulp washing or part are transferred dense workshop section, as carries out qualified discharge and also need make waste water reach emission standard by advanced treatment.
Biological treatment adopts aspergillus niger S13 to carry out pre-treatment, the biological treatment condition: 30-56 hour seed culture time, inoculum size 0.5%-3.0%, treatment temp 20-45 ℃, treatment time 36-72 hour, wastewater treatment pH value 6.0-8.5, ventilating ratio 1:0.25-0.6, waste water COD
CrConcentration 5000mg/1-20000mg/1.Adopt this biological pre-treatment process that fast growing wood raw material A PMP waste water is handled COD
CrClearance is at 45%-82%, and the SS clearance is at 55%-85%.
This bacterial strain has been deposited in China Committee for Culture Collection of Microorganisms common micro-organisms center; Address: Datun Road, Chaoyang District, Beijing City Institute of Microorganism, Academia Sinica; Preservation date: on November 25th, 2008; Deposit number: CGMCC No.2784; Classification name: aspergillus niger Aspergillus niger.
Waste water flocculates and manages everywhere after the Biological Pretreatment.In the traditional technology generally flocculation treatment as preprocessing means, but because high-yield pulping waste liquid pollutes less than the chemical pulp height, waste liquid toxicity is also lower, employing has the bacterial classification of better tolerance directly to carry out a biological disposal upon to lipid acid toxicity, and traditional technology is carried out a biological disposal upon after the flocculation pre-treatment then, and the biological treatment back is all higher owing to SS, colourity etc. in the waste water, still need to carry out flocculation treatment for improving the processed waste water quality, this technology will be carried out a biological disposal upon as preprocessing means, compare with traditional technology, equal to omit the flocculation pre-treatment.
Flocculation treatment adopts polymerize aluminum chloride and cationic polyacrylamide that waste water is carried out flocculation treatment.Flocculation treatment pH value 5.2-7.5, polymerize aluminum chloride and polyacrylamide addition sequence are polymerize aluminum chloride elder generation, and behind the polyacrylamide, both adding point duct lengths are at 5-30m.The polymerize aluminum chloride consumption is at 20-300mg/l, and the polyacrylamide add-on is at 1-30mg/l.Through flocculation treatment COD
CrClearance is at 70-92%, and the SS clearance is at 85%-97%.
Processed waste water can be used for getting the raw materials ready, pulp washing, part workshop section are transferred technologies such as dense.Waste water still need carry out advanced treatment as discharging after Biological Pretreatment and flocculation treatment, and advanced treatment can adopt processing such as adsorption-flocculation, wet oxidation, catalyzed oxidation, membrane technique.
The living poplar PRC-APMP pulping waste liquor disposition of embodiment 1 speed
Waste water original index: COD
Cr: 6210mg/l, SS:2230mg/l, BOD5:2030mg/l, pH:8.21
The Biological Pretreatment condition: biological treatment adopts aspergillus niger S13 to carry out pre-treatment, 36 hours seed culture time, inoculum size 1.0%, 35 ℃ of treatment temps, 48 hours treatment times, wastewater treatment pH value 6.5 (regulating with hydrochloric acid or sulfuric acid), ventilating ratio 1: 0.3.
Handle back COD
Cr: 2330mg/l, SS:388mg/l, BOD5:165mg/l, pH:6.41
The COD clearance: 62.5%, SS clearance: 82.6%.
Carry out flocculation treatment after the Biological Pretreatment: flocculation treatment pH value 6.41, add polymerize aluminum chloride earlier, consumption is at 50mg/l, and the polyacrylamide add-on is at 5mg/l.Adopt precipitate and separate after the flocculation treatment, sedimentation time 4h.
COD after the flocculation treatment
Cr: 219mg/l, SS:48mg/l,
Through flocculation treatment COD
CrClearance is 90.6%, and the SS clearance is 87.6%.
After the flocculation treatment recovering and reutilizing waste water in get the raw materials ready, operations such as preimpregnation, pulp washing, papermaking low pressure spray net, wastewater recycle rate reaches as high as 82%.
Waste water adopts adsorption-flocculation to carry out advanced treatment after the flocculation treatment, sorbent material uses the ultra-fine wilkinite of 800 orders, dosage 150mg/l, adsorption time 30min adsorbs other condition natures, on the technology along connecing the flocculation water outlet, the absorption back adopts poly-silicon aluminum chloride to flocculate, and poly-silicon aluminum chloride consumption 5mg/l adopts settling tank to separate after the flocculation treatment, settling time 2h, effluent index is as follows: COD
Cr: 68mg/l, SS:26mg/l, BOD5:22mg/l, pH:6.30.
Embodiment 2 Eucalyptus APMP pulping waste liquor dispositions
Waste water original index: COD
Cr: 7360mg/l, SS:2150mg/l, BOD5:2260mg/l, pH:8.41
The Biological Pretreatment condition: biological treatment adopts aspergillus niger S13 to carry out pre-treatment, 32 hours seed culture time, inoculum size 1.5%, 35 ℃ of treatment temps, 56 hours treatment times, wastewater treatment pH value 6.5 (regulating with hydrochloric acid or sulfuric acid), ventilating ratio 1: 0.3.
Handle back COD
Cr: 2540mg/l, SS:305mg/l, BOD5:182mg/l, pH:6.43
The COD clearance: 65.5%, SS clearance: 85.8%.
Carry out flocculation treatment after the Biological Pretreatment: flocculation treatment pH value 6.43, add polymerize aluminum chloride earlier, consumption is at 75mg/l, and the polyacrylamide add-on is at 4mg/l.Adopt precipitate and separate after the flocculation treatment, sedimentation time 6h.
COD after the flocculation treatment
Cr: 268mg/l, SS:52mg/l,
89.4%, the SS clearance is 82.9% through flocculation treatment CODcr clearance.
Waste water adopts adsorption-flocculation to carry out advanced treatment after the flocculation treatment, sorbent material uses the ultra-fine wilkinite of 800 orders, dosage 200mg/l, adsorption time 50min adsorbs other condition natures, on the technology along connecing the flocculation water outlet, the absorption back adopts poly-silicon aluminum chloride to flocculate, and poly-silicon aluminum chloride consumption 7.5mg/l adopts settling tank to separate after the flocculation treatment, settling time 2h, effluent index is as follows: COD
Cr: 92mg/l, SS:22mg/l, pH:6.41.
Claims (9)
1. an APMP (Alkaline Peroxide Mechanical Pulp) pulp-making waste-water New Process for Treatment is characterized in that at first adopting aspergillus niger S13 that waste water is carried out pre-treatment, carries out flocculation sediment and advanced treatment then.
2. according to the described pulping wastewater treatment technology of claim 1, be applicable to that poplar, Eucalyptus and various fast growing wood raw material adopt APMP, PRC-APMP pulping process to produce the comprehensive wastewater that high yield pulp produces.
3. pulping wastewater treatment technology according to claim 1, its feature is at first adopting aspergillus niger S13 that waste water is carried out pre-treatment.
4. according to the described pretreatment technology of claim 3, its aspergillus niger seed culture time 30-56 hour, inoculum size 0.5%-3.0%, 20 ℃-45 ℃ of treatment temps, treatment time 36-72 hour, wastewater treatment pH value 6.0-8.5, ventilating ratio 1: 0.25-0.6, waste water COD cr concentration 5000mg/l-20000mg/l.
5. according to the described processing condition of claim 4 APMP waste water is carried out a biological disposal upon, the CODcr clearance is at 45%-82%, and the SS clearance is at 55%-85%.
6. according to the described treatment process of claim 1, the APMP pulp-making waste-water need carry out flocculation treatment again after Biological Pretreatment.
7. according to the described flocculation treatment of claim 6, adopt polymerize aluminum chloride and cationic polyacrylamide that waste water is carried out flocculation treatment.Flocculation treatment pH value 5.2-7.5, polymerize aluminum chloride and polyacrylamide addition sequence are polymerize aluminum chloride elder generation, and behind the polyacrylamide, both addings are selected duct length at 5-30 rice.The polymerize aluminum chloride consumption is at 20-300mg/l, and the polyacrylamide add-on is at 1-30mg/l.
8. according to the described flocculation treatment of using of claim 7, the CODcr clearance is at 70-92%, and the SS clearance is at 85%-97%.Processed waste water can be used for getting the raw materials ready, pulp washing, part workshop section are transferred technologies such as dense.
9. according to the described treatment process of claim 1, waste water still need carry out advanced treatment as discharging after Biological Pretreatment and flocculation treatment, and advanced treatment can adopt processing such as adsorption-flocculation, wet oxidation, catalyzed oxidation.
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| CN201010116595A CN101805092A (en) | 2010-03-03 | 2010-03-03 | New process for treatment of APMP pulp-making wastewater |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102816007A (en) * | 2012-09-10 | 2012-12-12 | 谢明文 | Method for preparing trace-element fertilizer |
| CN104355349A (en) * | 2014-10-23 | 2015-02-18 | 天津科技大学 | Method for inhibiting chlorella pyrenoidosa by allelochemical substances extracted from poplar APMP pulping wastewater |
| CN107434285A (en) * | 2017-08-23 | 2017-12-05 | 华南理工大学 | A kind of preparation method for being used to slow down the modified polyaluminium chloride of secondary fiber papermaking waste water hyperfiltration treatment fouling membrane |
| CN108585343A (en) * | 2017-08-01 | 2018-09-28 | 王建玲 | The recycle device and processing method of papermaking enriched water |
| CN113429087A (en) * | 2021-08-09 | 2021-09-24 | 江苏南大华兴环保科技股份公司 | Method for treating perfume oil-containing wastewater by activated sludge-biofilm symbiotic system |
| CN117491536A (en) * | 2023-12-29 | 2024-02-02 | 中国林业科学研究院林产化学工业研究所 | Method for identifying microbial toxic substances in pulping wastewater of PRC-APMP (PRC-APMP) process |
-
2010
- 2010-03-03 CN CN201010116595A patent/CN101805092A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102816007A (en) * | 2012-09-10 | 2012-12-12 | 谢明文 | Method for preparing trace-element fertilizer |
| CN102816007B (en) * | 2012-09-10 | 2013-10-23 | 谢明文 | Method for preparing trace-element fertilizer |
| CN104355349A (en) * | 2014-10-23 | 2015-02-18 | 天津科技大学 | Method for inhibiting chlorella pyrenoidosa by allelochemical substances extracted from poplar APMP pulping wastewater |
| CN108585343A (en) * | 2017-08-01 | 2018-09-28 | 王建玲 | The recycle device and processing method of papermaking enriched water |
| CN107434285A (en) * | 2017-08-23 | 2017-12-05 | 华南理工大学 | A kind of preparation method for being used to slow down the modified polyaluminium chloride of secondary fiber papermaking waste water hyperfiltration treatment fouling membrane |
| CN113429087A (en) * | 2021-08-09 | 2021-09-24 | 江苏南大华兴环保科技股份公司 | Method for treating perfume oil-containing wastewater by activated sludge-biofilm symbiotic system |
| CN117491536A (en) * | 2023-12-29 | 2024-02-02 | 中国林业科学研究院林产化学工业研究所 | Method for identifying microbial toxic substances in pulping wastewater of PRC-APMP (PRC-APMP) process |
| CN117491536B (en) * | 2023-12-29 | 2024-03-12 | 中国林业科学研究院林产化学工业研究所 | Method for identifying microbial toxic substances in pulping wastewater of PRC-APMP (PRC-APMP) process |
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Open date: 20100818 |