CN103241910B - Treatment method of tobacco sheet production wastewater - Google Patents

Treatment method of tobacco sheet production wastewater Download PDF

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Publication number
CN103241910B
CN103241910B CN201310212180.5A CN201310212180A CN103241910B CN 103241910 B CN103241910 B CN 103241910B CN 201310212180 A CN201310212180 A CN 201310212180A CN 103241910 B CN103241910 B CN 103241910B
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pond
waste water
water
electrolysis
treatment
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CN103241910A (en
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张世文
王峰
许雅玲
陈艺羡
王福利
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Boying Xiamen Science and Technology Co Ltd
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Boying Xiamen Science and Technology Co Ltd
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Priority to PCT/CN2014/078250 priority patent/WO2014190874A1/en
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Abstract

The invention provides a treatment method of tobacco sheet production wastewater. The treatment method comprises the following steps of: removing slag, carrying out chemical de-calcification, carrying out anaerobic treatment, carrying out electrolysis, carrying out A/O treatment, carrying out secondary electrolysis, biochemically processing by using a biological aerated filter, and disinfecting and treating sludge. The treatment method of tobacco sheet production wastewater is used for treating the tobacco sheet production wastewater by combining a chemical de-calcification technology, a biochemical technology, an electrochemical technology and a BAF (Biological Aerated Filter) technology, so that the cost is lower and the efficiency is higher, and therefore, the wastewater can be exhausted after reaching the standards.

Description

The treatment process of tobacco sheet factory effluent
Technical field
The present invention relates to a kind for the treatment of process of tobacco sheet factory effluent, particularly relate to a kind of tobacco sheet factory effluent based on chemical decalcification technology, Measurement for Biochemistry, electrochemical techniques and BAF technology and the treatment process of tobacco factory effluent, belong to the water pollution control field of environmental engineering.
Background technology
Tobacco leaf is when producing, and raw material can not be utilized completely, and tobacco is from preliminary working to making the production process of cigarette, can produce the particle that accounts for greatly former cigarette material total amount 1/3, and these tobacco particles cannot directly be made cigarette product as raw material again.The comprehensive utilization that produces, realizes particle in order to reduce waste material, tobacco sheet technology is arisen at the historic moment.Tobacco sheet, having another name called reconstituted tobacco (Reconstituted Tobacco), is to utilize the tobacco materials such as offal, offal, tobacco cut to make sheet or thread reconstituted product for raw material, is used as cigarette filler, reduce the tar content in cigarette, reduce the Health hazard that smoking brings to human body.The use of tobacco sheet has the tobacco quality of raising, reduces cigarette cost, saves the plurality of advantages such as raw materials consumption, resource reutilization.Roll-in method, thick slurry method and paper process are the main production methods of current tobacco sheet.Compare with thick slurry method thin slice with roll-in method, paper process thin slice has obvious advantage: reduce production of cigarettes cost, constant product quality, filling value and becomes high, the resistance to machining property of silk rate good, improved the combustionvelocity of cigarette and reduced releasing content of coke tar, product plasticity-is high and more easily process, and is effective technique of current production " health type " cigarette.Just because of papermaking thin slice have advantages of roll-in method and thick slurry method incomparable, therefore all obtained extensive popularization at home and abroad.
The general character of the existing paper waste of waste water producing in tobacco sheets by paper making method production process is as contained a large amount of fibers, have again that tobacco wastewater colourity is high, biodegradability is poor simultaneously, contain features such as the disadvantageous nicotine of microorganism growth and the high 150~500mg/L of calcium-magnesium content in waste water, main contamination index is as following table:
Waste strength fluctuation is simultaneously larger, and CODcr is from 1500~25000mg/L, and SS is from 1000~15000mg/L, and nicotine and tar suppress microorganism growth, and the high reactor fouling that causes of calcium-magnesium content can not normally move, and belongs to the difficult organic waste water of high density.
Chinese patent CN1683261A discloses a kind for the treatment of process of papermaking method tobacco sheet production wastewater, i.e. the treatment process of the tobacco sheet factory effluent of coagulation air-float+aerobic oxidation+mechanical filter.
Chinese patent CN102276093A discloses a kind for the treatment of process of papermaking method tobacco sheet production wastewater, and this technique comprises the following steps: by factory effluent, by grid coarse filtration, gravity flow enters wastewater equalization pond; By lift pump by the waste water lifting in wastewater equalization pond to adding Ca-diatom soil series compound flocculating agent reaction 5-10min in coagulator, then add bodied ferric sulfate, polyacrylamide separating agent enters the reaction of static reaction pond, the reaction times is 50-60min; By the pH regulator of the organic waste water of lower concentration, be to pump in ultrasonic micro-electrolysis reactor after slant acidity, by ultrasonic wave and micro-electrolysis, jointly react, make Chemical Oxygen Demand in Wastwater material rapid-digestion, the reaction times is 30-60min; Again by waste water process charcoal absorption and quartz sand filtration; The mud that equalizing tank and static reaction pond workshop section are produced is used as solid fuel after overlapping screwed sludge dewatering equipment is processed.
In Chinese patent CN10133045A, disclose papermaking method tobacco sheet production wastewater and to three-stage filtration, be back to respectively again slurrying workshop section through one, reuse water adopts the method that is regularly thrown into sewage works, but factory effluent loops back for the production of affecting greatly thin slice quality.
Chinese patent CN1683261A discloses papermaking method tobacco sheet production wastewater and first through coagulating treatment, By Bubble-floating Method, has removed wherein suspended solid, then sends into aeration tank and by aerobic microbiological, removes the method for most COD material.
Above method all has certain effect to the processing of tobacco sheet factory effluent, but exist, technical process is long, facility investment is large, floor space is large, the defects such as working cost height, more seriously owing to containing a large amount of calcium in waste water, directly cause a large amount of foulings of biochemical treatment system and film separating system, system cannot normally be moved, and the waste discharge after existing wastewater processing technology is processed all can not reach emission standard.
Summary of the invention
The object of the invention is to for existingly in existing tobacco production wastewater treatment method establishing that long, the standby investment of technical process is large, floor space is large, working cost is high, biochemical treatment system and film processing system be because fouling can not normally move, the defects such as the waste discharge after processing is not up to standard, providing a kind of combines with BAF technology based on chemical decalcification technology, Measurement for Biochemistry, electrochemical techniques, cost is lower, usefulness is higher, makes it the treatment process of the tobacco factory effluent of qualified discharge.
The treatment process of tobacco sheet factory effluent of the present invention comprises the following steps:
(1) slagging-off
Tobacco sheet factory effluent enters mechanical coarse rack water collecting basin after pipeline is collected, coarse rack is set in pond, cursory thing thick in sewage is isolated to removal, to prevent that follow-up treatment facility from stopping up, then pass through lift pump, tobacco sheet factory effluent water extraction is risen in rotating machinery grid maker, by the filtration of filter screen, further remove the suspended substance of most of insolubility in water, what produce transports outward every slag packing, waste water carries out air supporting through air flotation pool, macrobead fiber in waste water and other suspended substances are carried out to separation, greatly alleviate the processing load of subsequent technique.
(2) chemical decalcification
Air flotation pool water outlet flows into one-level decalcification reaction tank through pipeline, through chemicals dosing plant, under agitation first add the saturated settled solution of appropriate lime adjust pH to 8.5~9.5, remove after false hardness (supercarbonate), flow into secondary decalcification reaction tank, pass into the gas that in step (3) anaerobic treatment, UASB anaerobic pond produces, make CO in gas 2react with calcium ions and magnesium ions and generate carbonate deposition, or add the Na of 100 ~ 400mg/L 2cO 3, carbonate being reacted with calcium ions and magnesium ions and generate carbonate deposition, water outlet first adds the FeSO of 5 ~ 10mg/L after flowing into coagulation basin under agitation condition 4, then add Na 2cO 3anti-adjust pH to 8~9, finally add the polyphenyl alkene acid amides (PAM) of 2 ~ 3mg/L, enter preliminary sedimentation tank and carry out precipitate and separate after reacting completely, thereby remove tobacco, process the calcium ions and magnesium ions in waste water, and clearance reaches 50 ~ 90%, reduces water hardness, makes Ca 2+lower than 50 mg/L, prevent that follow-up equipment, facility are because of too high Ca 2+fouling; Throw out in preliminary sedimentation tank (being mud) is sent in sludge sump through pump and pipeline, finally in sludge dehydration device, carries out filtering separation, and reclaims calcium carbonate, and preliminary sedimentation tank water outlet enters equalizing tank.
(3) anaerobic treatment
Equalizing tank water outlet is promoted to hydrolysis acidification pool through lift pump, at hydrolysis acidification pool, stop certain hour, utilize acid-producing bacteria that the acidication under the effect of acid-producing bacteria of the larger molecular organics in waste water is become to small molecular organic acid, then through lift pump, enter UASB anaerobic pond, in process UASB anaerobic pond, under the absorption of anerobe, the oxygen bacterium of holding concurrently, fermentation, the acting in conjunction of product methane, organic acid is resolved into methane and carbon dioxide, by anaerobic treatment, improve the B/C value of waste water, improve the biodegradability of waste water; The secondary decalcification reaction tank that the methane and carbon dioxide producing imports in the chemical decalcification of step (2) after gas collector is collected removes carbonic acid gas, hydrogen sulfide, the mercaptan compound impurity in biogas, after purifying, reclaims biogas in gas holder; Waste water enters step (4).
(4) electrolysis
The water outlet of UASB anaerobic pond enters electrolysis machine a and carries out electrolysis, to remove colourity, smelly, makes the biochemical macromolecular cpd open loop of difficulty in waste water chain rupture simultaneously, become can be biochemical small molecules, further improve B/C value, improve the condition of follow-up biochemical treatment; The adjacent two interelectrode voltages of electrolysis machine are 2~12V, and current density is 10~320mA/cm 2.
(5) A/O processes
Electrolysis water outlet enters anoxic pond, Aerobic Pond and medium sediment pool successively, and the part mud of medium sediment pool is back to anoxic pond by reflux pump, utilize under the alternating action of anoxic, aerobic microbiological and can carry out denitrogenation dephosphorizing, and by the organism in the further oxygenolysis waste water of aerobic treatment, the degree of depth is removed COD and BOD; In Aerobic Pond, evenly fill up a large amount of biological suspended packings, for aerobic microbiological provides, perch, the place of growth and breeding, so that microorganism forms microbial film at filling surface; In Aerobic Pond bottom, be provided with aeration aerating stirring system, sewage is carried out to oxygenation, make the dissolved oxygen in water maintain 2~4 mg/L, the effect that simultaneously utilizes gas to rise, suspended substance in pond is more fully contacted with water, in addition by the agitaion of gas and clear water back flushing, can effectively to the aging microbial film of filling surface growth, wash away, impel biomembranous update, make microbial film maintain higher activity.
(6) re-electrolysis
Medium sediment pool water outlet again enters electrolysis machine b and carries out electrolysis, makes to be difficult to biochemical larger molecular organics through electrolysis generation open loop chain scission in waste water, is converted into and is easy to biochemical small organic molecule, improves B/C; During electrolysis, adjacent two interelectrode voltages are 2~6V, and current density is 20~200mA/cm 2.
(7) BAF biochemical (BAF is biochemical)
Waste water after re-electrolysis enters BAF, by oxidation degradation effect, waste water is purified, and further removes COD, SS and ammonia nitrogen, is purified waste water.
(8) sterilization
Waste water is after BAF biochemical treatment, and water outlet is processed through electrosterilization pond again, can further remove colourity, and waste water is carried out to sterilization and disinfection, last qualified discharge.
(9) sludge treatment
The mud that during UASB anaerobic pond in step (3) anaerobic treatment, step (5) A/O process, anoxic pond, Aerobic Pond and medium sediment pool and the biochemical treatment of step (7) aeration biochemical filter tank produce all enters sludge sump by pipeline, then the dehydration through sludge filter press makes reducing sludge volume, after dehydration, mud cake carries out burning disposal, and filtrate is back to the equalizing tank in the chemical decalcification of step (2).
Described in step (1) slagging-off, air supporting is a kind of of gas distribution By Bubble-floating Method, electric floating method, biology and chemical floatation treatment, dissolved air flotation.
The second step of the chemical decalcification of step (2) is that the biogas (containing methane, carbonic acid gas, hydrogen sulfide, sulfur alcohol compound, ammonia etc.) that UASB anaerobic pond is produced leads to secondary decalcification pond, makes CO in gas 2react with calcium ions and magnesium ions when generating carbonate deposition, the hydrogen sulfide in biogas, sulfur alcohol compound, ammonia etc. react with calcium ions and magnesium ions, make biogas also obtain purification, and the biogas after purification can be collected in gas holder and further utilize.
Electrolysis machine a and the electrolysis machine b of step (4) and step (6) are provided with power supply and electrolyzer, and the electrode materials in described electrolyzer is a kind of in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic inert material; The top layer of described nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10~35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
Waste water is as shown in the table through the above effect of processing:
This is compared with the prior art, has following outstanding advantages:
(1) the one-level decalcification reaction by chemical decalcification system removes after false hardness (supercarbonate), then makes carbonate react generation carbonate deposition with calcium ions and magnesium ions through secondary decalcification reaction tank, then de-steady the and FeSO of carbonate deposition in coagulation basin 4flocculate mutually with coagulant aidss such as polyphenyl alkene acid amides (PAM), be gathered into thick alumina blossom particles, in preliminary sedimentation tank, settle down, high-concentration Ca, magnesium ion in final effective elimination tobacco sheet factory effluent, clearance reaches 50 ~ 90%, reduces water hardness, makes Ca 2+lower than 50 mg/L, prevent equipment scaling, guarantee that follow-up biochemical treatment and electrolysis process are smooth, steady running.
(2) after UASB system for anaerobic treatment is processed, the indexs such as the COD in waste water, BOD significantly reduce, and the gas of generation imports the secondary decalcification reaction tank in chemical decalcification after gas collector is collected, and makes CO in gas 2react with calcium ions and magnesium ions and generate carbonate deposition, on the one hand CO in gas recovery 2, gas is utilized effectively; By secondary decalcification reaction tank, remove the H in gas on the other hand 2s, Purge gas, biogas is collected and is utilized or high altitude discharge by gas holder again.
(3) after slagging-off and the processing of chemical decalcification system, the SS clearance in waste water reaches more than 95%, and the SS in equalizing tank greatly reduces, and avoids the deposition of mud in equalizing tank, alleviates and moves at ordinary times clear mud workload.
(4) the strong oxidizing property free radical producing by nano-catalytic electrolysis makes the biochemical macromolecular cpd open loop of the difficulty chain rupture in waste water, become can be biochemical small molecules, further improve B/C value, improve the condition of follow-up biochemical treatment, and remove colourity and the stink in waste water, reduce the indexs such as ammonia nitrogen, COD.
(5) through A/O biochemistry pool, by the alternating action of anaerobic-aerobic, can carry out denitrogenation dephosphorizing to sewage.
(6), after the biochemical treatment of aeration biochemical filter tank, the oxygenolysis by aerobic microbiological thoroughly decomposes pollutant in water, makes stable effluent quality, qualified discharge.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
The present invention is in the design to tobacco sheet production wastewater treatment method that the composition of existing tobacco sheet factory effluent, character and existing processing scheme are goed deep into completing after the comparative study of system, it uses by the combination of the methods such as chemical decalcification, biochemistry, electrochemistry, BAF, thereby forms a kind for the treatment of process that is particularly suitable for tobacco sheet factory effluent.
1 the specific embodiment of the present invention is described with reference to the accompanying drawings.
Embodiment 1
The treatment process of 2000 ton per day tobacco sheet factory effluents.
Described tobacco sheet factory effluent water-quality guideline is as shown in table 1 after measured.
The water-quality guideline of table 1 tobacco sheet factory effluent
Sequence number Project Unit Measured value Sequence number Project Unit Measured value
1 BOD 5 mg/L 5800 5 Colourity Doubly 15000
2 COD Cr mg/L 25000 6 Ca 2+ mg/L 200
3 SS mg/L 15000 7 Water temperature 50
4 PH value ? 6.2 ? ? ? ?
(1) slagging-off
Tobacco sheet factory effluent enters mechanical coarse rack water collecting basin 1 after pipeline is collected, coarse rack is set in pond, cursory thing thick in sewage is isolated to removal, to prevent that follow-up treatment facility from stopping up, then by lift pump 22, tobacco sheet factory effluent is promoted in rotating machinery grid maker 2, by the filtration of filter screen, further remove the suspended substance of most of insolubility in water, what produce transports outward every slag packing, waste water passes through air flotation pool 3, macrobead fiber in waste water and other suspended substances are carried out to separation, greatly alleviate the processing load of subsequent technique.
(2) chemical decalcification
Air flotation pool water outlet flows into one-level decalcification reaction tank 4 through pipeline, through chemicals dosing plant, under agitation first add the saturated settled solution of appropriate lime adjust pH to 8.5, remove after false hardness (supercarbonate), flow into secondary decalcification reaction tank 5, pass into the gas that in step (3) anaerobic treatment, UASB anaerobic pond 10 produces, make CO in gas 2react with calcium ions and magnesium ions and generate carbonate deposition, water outlet first adds the FeSO of 6mg/L after flowing into coagulation basin 6 under agitation condition 4, then add Na 2cO 3anti-adjust pH to 8, finally adds the polyphenyl alkene acid amides (PAM) of 2mg/L, enters preliminary sedimentation tank 7 and carry out precipitate and separate after reacting completely, thereby remove tobacco, processes the calcium ions and magnesium ions in waste water, and clearance reaches 75%, reduces water hardness, makes Ca 2+concentration is 50 mg/L, prevents that follow-up equipment, facility are because of too high Ca 2+fouling; Throw out in preliminary sedimentation tank 7 (being mud) is sent in sludge sump 20 through pump and pipeline, finally in sludge filter press 21, carries out filtering separation, and reclaims calcium carbonate, and preliminary sedimentation tank 7 water outlets enter equalizing tank 8.
(3) anaerobic treatment
Equalizing tank 8 water outlets are promoted to hydrolysis acidification pool 9 through lift pump 23, at hydrolysis acidification pool 9, stop certain hour, utilize acid-producing bacteria that the acidication under the effect of acid-producing bacteria of the larger molecular organics in waste water is become to small molecular organic acid, then through lift pump 24, enter UASB anaerobic pond 10, in process UASB anaerobic pond 10, under the absorption of anerobe, the oxygen bacterium of holding concurrently, fermentation, the acting in conjunction of product methane, organic acid is resolved into methane and carbon dioxide, by anaerobic treatment, improve the B/C value of waste water, improve the biodegradability of waste water; The secondary decalcification reaction tank that the methane and carbon dioxide producing imports in the chemical decalcification of step (2) after gas collector 27 is collected removes carbonic acid gas, hydrogen sulfide, the mercaptan compound impurity in biogas, after purifying, reclaims biogas in biogas storage tank 28; Waste water enters step (4).
(4) electrolysis
10 water outlets of UASB anaerobic pond enter electrolysis machine 11 and carry out electrolysis, to remove colourity, smelly, make the biochemical macromolecular cpd open loop of difficulty in waste water chain rupture simultaneously, become can be biochemical small molecules, further improve B/C value, improve the condition of follow-up biochemical treatment; The adjacent two interelectrode voltages of electrolysis machine 11 are 3V, and current density is 300mA/cm 2.
(5) A/O processes
Electrolysis water outlet enters anoxic pond 12, Aerobic Pond 13 and medium sediment pool 14 successively, and the part mud of medium sediment pool 14 is back to anoxic pond 12 by reflux pump, utilize under the alternating action of anoxic, aerobic microbiological and can carry out denitrogenation dephosphorizing, and by the organism in the further oxygenolysis waste water of aerobic treatment, the degree of depth is removed COD and BOD; Aerobic Pond 13 is interior evenly fills up a large amount of biological suspended packings, perches, the place of growth and breeding, so that microorganism forms microbial film at filling surface for aerobic microbiological provides.In Aerobic Pond 13 bottoms, be provided with aeration aerating stirring system, sewage is carried out to oxygenation, make the dissolved oxygen in water maintain 2~4 mg/L, the effect that simultaneously utilizes gas to rise, suspended substance in pond is more fully contacted with water, in addition by the agitaion of gas and clear water back flushing, can effectively to the aging microbial film of filling surface growth, wash away, impel biomembranous update, make microbial film maintain higher activity.
(6) re-electrolysis
Medium sediment pool 14 water outlets again enter electrolysis machine 15 and carry out electrolysis, make to be difficult to biochemical larger molecular organics through electrolysis generation open loop chain scission in waste water, are converted into and are easy to biochemical small organic molecule, improve B/C; During electrolysis, adjacent two interelectrode voltages are 6V, and current density is 20mA/cm 2.
(7) BAF biochemical (BAF is biochemical)
Waste water after re-electrolysis enters BAF 16, by oxidation degradation effect, waste water is purified, and further removes COD, SS and ammonia nitrogen, is purified waste water.
(8) sterilization
Waste water is after BAF 16 biochemical treatments, and water outlet is promoted to electrosterilization pond 17 by lift pump 25 and processes, and can further remove colourity, and waste water is carried out to sterilization and disinfection, finally by discharge canal 18 qualified discharges.
(9) sludge treatment
The mud that during UASB anaerobic pond 10 in step (3) anaerobic treatment, step (5) A/O process, anoxic pond 12, Aerobic Pond 13 and medium sediment pool 14 and 16 biochemical treatments of step (7) aeration biochemical filter tank produce all enters sludge sump 20 by pipeline, then the dehydration through sludge filter press 21 makes reducing sludge volume, after dehydration, mud cake carries out burning disposal, and filtrate is back to the equalizing tank 8 in the chemical decalcification of step (2).
Effluent quality index is as shown in table 2 after measured.
The water-quality guideline of table 2 water outlet
Sequence number Project Unit Measured value Sequence number Project Unit Measured value
1 BOD 5 mg/L 16 5 Colourity Doubly 25
2 COD Cr mg/L 60 6 Ca 2+ mg/L 45
3 SS mg/L 65 7 Water temperature 23
4 PH value ? 6.9 ? ? ? ?
Embodiment 2
The treatment process of 5000 ton per day tobacco sheet factory effluents.
Described tobacco sheet factory effluent water-quality guideline is as shown in table 3 after measured.
The water-quality guideline of table 3 tobacco sheet factory effluent
Sequence number Project Unit Measured value Sequence number Project Unit Measured value
1 BOD 5 mg/L 2000 5 Colourity Doubly 25000
2 COD Cr mg/L 8000 6 Ca 2+ mg/L 300
3 SS mg/L 6200 7 Water temperature 55
4 PH value ? 6 ? ? ? ?
(1) slagging-off
Tobacco sheet factory effluent enters mechanical coarse rack water collecting basin 1 after pipeline is collected, coarse rack is set in pond, cursory thing thick in sewage is isolated to removal, to prevent that follow-up treatment facility from stopping up, then by lift pump 22, tobacco sheet factory effluent water extraction is risen in rotating machinery grid maker 2, by the filtration of filter screen, further remove the suspended substance of most of insolubility in water, what produce transports outward every slag packing, waste water passes through air flotation pool 3, macrobead fiber in waste water and other suspended substances are carried out to separation, greatly alleviate the processing load of subsequent technique.
(2) chemical decalcification
Air flotation pool 3 water outlets flow into one-level decalcification reaction tank 4 through pipeline, through chemicals dosing plant, under agitation first add the saturated settled solution of appropriate lime adjust pH to 9.5, remove after false hardness (supercarbonate), flow into secondary decalcification reaction tank 5, add the Na of 400mg/L 2cO 3, carbonate is reacted with calcium ions and magnesium ions and generate carbonate deposition, make CO in gas 2react with calcium ions and magnesium ions and generate carbonate deposition, water outlet first adds the FeSO of 10mg/L after flowing into coagulation basin 6 under agitation condition 4, then add Na 2cO 3anti-adjust pH to 8.5, finally adds the polyphenyl alkene acid amides (PAM) of 2.5mg/L, enters preliminary sedimentation tank 7 and carry out precipitate and separate after reacting completely, thereby remove tobacco, processes the calcium ions and magnesium ions in waste water, and clearance reaches 84%, reduces water hardness, makes Ca 2+concentration is 48mg/L, prevents that follow-up equipment, facility are because of too high Ca 2+fouling; Throw out in preliminary sedimentation tank 7 (being mud) is sent in sludge sump 20 through pump and pipeline, finally in sludge filter press 21, carries out filtering separation, and reclaims calcium carbonate, and preliminary sedimentation tank 7 water outlets enter equalizing tank 8.
(3) anaerobic treatment
Equalizing tank 8 water outlets are promoted to hydrolysis acidification pool 9 through lift pump 23, at hydrolysis acidification pool 9, stop certain hour, utilize acid-producing bacteria that the acidication under the effect of acid-producing bacteria of the larger molecular organics in waste water is become to small molecular organic acid, then through lift pump 24, enter UASB anaerobic pond 10, in process UASB anaerobic pond 10, under the absorption of anerobe, the oxygen bacterium of holding concurrently, fermentation, the acting in conjunction of product methane, organic acid is resolved into methane and carbon dioxide, by anaerobic treatment, improve the B/C value of waste water, improve the biodegradability of waste water; The secondary decalcification reaction tank 5 that the methane and carbon dioxide producing imports in the chemical decalcification of step (2) after gas collector 27 is collected removes carbonic acid gas, hydrogen sulfide, the mercaptan compound impurity in biogas, after purifying, reclaims biogas in biogas storage tank 28; Waste water enters step (4).
(4) electrolysis
10 water outlets of UASB anaerobic pond enter electrolysis machine 11 and carry out electrolysis, to remove colourity, smelly, make the biochemical macromolecular cpd open loop of difficulty in waste water chain rupture simultaneously, become can be biochemical small molecules, further improve B/C value, improve the condition of follow-up biochemical treatment; The adjacent two interelectrode voltages of electrolysis machine 11 are 8V, and current density is 150mA/cm 2.
(5) A/O processes
Electrolysis water outlet enters anoxic pond 12, Aerobic Pond 13 and medium sediment pool 14 successively, and the part mud of medium sediment pool 14 is back to anoxic pond 12 by reflux pump, utilize under the alternating action of anoxic, aerobic microbiological and can carry out denitrogenation dephosphorizing, and by the organism in the further oxygenolysis waste water of aerobic treatment, the degree of depth is removed COD and BOD; Aerobic Pond 13 is interior evenly fills up a large amount of biological suspended packings, perches, the place of growth and breeding, so that microorganism forms microbial film at filling surface for aerobic microbiological provides.In Aerobic Pond 13 bottoms, be provided with aeration aerating stirring system, sewage is carried out to oxygenation, make the dissolved oxygen in water maintain 2~4 mg/L, the effect that simultaneously utilizes gas to rise, suspended substance in pond is more fully contacted with water, in addition by the agitaion of gas and clear water back flushing, can effectively to the aging microbial film of filling surface growth, wash away, impel biomembranous update, make microbial film maintain higher activity.
(6) re-electrolysis
Medium sediment pool 14 water outlets again enter electrolysis machine 15 and carry out electrolysis, make to be difficult to biochemical larger molecular organics through electrolysis generation open loop chain scission in waste water, are converted into and are easy to biochemical small organic molecule, improve B/C; During electrolysis, adjacent two interelectrode voltages are 4V, and current density is 100mA/cm 2.
(7) BAF biochemical (BAF is biochemical)
Waste water after re-electrolysis enters BAF 16, by oxidation degradation effect, waste water is purified, and further removes COD, SS and ammonia nitrogen, is purified waste water.
(8) sterilization
Waste water is after BAF 16 biochemical treatments, and water outlet is promoted to electrosterilization pond 17 by lift pump 25 and processes, and can further remove colourity, and waste water is carried out to sterilization and disinfection, finally by discharge canal 18 qualified discharges.
(9) sludge treatment
The mud that during UASB anaerobic pond 10 in step (3) anaerobic treatment, step (5) A/O process, anoxic pond 12, Aerobic Pond 13 and medium sediment pool 14 and the biochemical treatment of step (7) aeration biochemical filter tank produce all enters sludge sump 20 by pipeline, then the dehydration through sludge filter press 21 makes reducing sludge volume, after dehydration, mud cake carries out burning disposal, and filtrate is back to the equalizing tank 8 in the chemical decalcification of step (2).
Effluent quality index is as shown in table 4 after measured.
Table 4 is processed the water-quality guideline of rear water outlet
Sequence number Project Unit Measured value Sequence number Project Unit Measured value
1 BOD 5 mg/L 15 5 Colourity Doubly 20
2 COD Cr mg/L 65 6 Ca 2+ mg/L 35
3 SS mg/L 50 7 Water temperature 25
4 PH value ? 6.5 ? ? ? ?
Embodiment 3
The recycling utilization method of 8000 ton per day tobacco sheet factory effluents.
Described tobacco sheet factory effluent water-quality guideline is as shown in table 5 after measured.
The water-quality guideline of table 5 tobacco sheet factory effluent
Sequence number Project Unit Measured value Sequence number Project Unit Measured value
1 BOD 5 mg/L 600 5 Colourity Doubly 20000
2 COD Cr mg/L 2000 6 Ca 2+ mg/L 400
3 SS mg/L 1000 7 Water temperature 50
4 PH value ? 6.5 ? ? ? ?
(1) slagging-off
Tobacco sheet factory effluent enters mechanical coarse rack water collecting basin 1 after pipeline is collected, coarse rack is set in pond, cursory thing thick in sewage is isolated to removal, to prevent that follow-up treatment facility from stopping up, then by lift pump 22, tobacco sheet factory effluent water extraction is risen in rotating machinery grid maker 2, by the filtration of filter screen, further remove the suspended substance of most of insolubility in water, what produce transports outward every slag packing, waste water passes through air flotation pool 3, macrobead fiber in waste water and other suspended substances are carried out to separation, greatly alleviate the processing load of subsequent technique.
(2) chemical decalcification
Air flotation pool 3 water outlets flow into one-level decalcification reaction tank 4 through pipeline, through chemicals dosing plant, under agitation first add the saturated settled solution of appropriate lime adjust pH to 9.0, remove after false hardness (supercarbonate), flow into secondary decalcification reaction tank 5, add the Na of 100mg/L 2cO 3, carbonate is reacted with calcium ions and magnesium ions and generate carbonate deposition, make CO in gas 2react with calcium ions and magnesium ions and generate carbonate deposition, water outlet first adds the FeSO of 5mg/L after flowing into coagulation basin 6 under agitation condition 4, then add Na 2cO 3anti-adjust pH to 9.0, finally adds the polyphenyl alkene acid amides (PAM) of 3mg/L, enters preliminary sedimentation tank 7 and carry out precipitate and separate after reacting completely, thereby remove tobacco, processes the calcium ions and magnesium ions in waste water, and clearance reaches 87.5%, reduces water hardness, makes Ca 2+concentration is 50mg/L, prevents that follow-up equipment, facility are because of too high Ca 2+fouling; Throw out in preliminary sedimentation tank 7 (being mud) is sent in sludge sump through pump and pipeline, finally in sludge filter press 21, carries out filtering separation, and reclaims calcium carbonate, and preliminary sedimentation tank 7 water outlets enter equalizing tank 8.
(3) anaerobic treatment
Equalizing tank 8 water outlets are promoted to hydrolysis acidification pool 9 through lift pump 23, at hydrolysis acidification pool 9, stop certain hour, utilize acid-producing bacteria that the acidication under the effect of acid-producing bacteria of the larger molecular organics in waste water is become to small molecular organic acid, then through lift pump 24, enter UASB anaerobic pond 10, in process UASB anaerobic pond 10, under the absorption of anerobe, the oxygen bacterium of holding concurrently, fermentation, the acting in conjunction of product methane, organic acid is resolved into methane and carbon dioxide, by anaerobic treatment, improve the B/C value of waste water, improve the biodegradability of waste water; The secondary decalcification reaction tank 5 that the methane and carbon dioxide producing imports in the chemical decalcification of step (2) after gas collector 27 is collected removes carbonic acid gas, hydrogen sulfide, the mercaptan compound impurity in biogas, after purifying, reclaims biogas in biogas storage tank 28; Waste water enters step (4).
(4) electrolysis
10 water outlets of UASB anaerobic pond enter electrolysis machine 11 and carry out electrolysis, to remove colourity, smelly, make the biochemical macromolecular cpd open loop of difficulty in waste water chain rupture simultaneously, become can be biochemical small molecules, further improve B/C value, improve the condition of follow-up biochemical treatment; The adjacent two interelectrode voltages of electrolysis machine 11 are 12V, and current density is 50mA/cm 2.
(5) A/O processes
Electrolysis water outlet enters anoxic pond 12, Aerobic Pond 13 and medium sediment pool 14 successively, and the part mud of medium sediment pool 14 is back to anoxic pond 12 by reflux pump, utilize under the alternating action of anoxic, aerobic microbiological and can carry out denitrogenation dephosphorizing, and by the organism in the further oxygenolysis waste water of aerobic treatment, the degree of depth is removed COD and BOD; Aerobic Pond 13 is interior evenly fills up a large amount of biological suspended packings, perches, the place of growth and breeding, so that microorganism forms microbial film at filling surface for aerobic microbiological provides.In Aerobic Pond 13 bottoms, be provided with aeration aerating stirring system, sewage is carried out to oxygenation, make the dissolved oxygen in water maintain 2~4 mg/L, the effect that simultaneously utilizes gas to rise, suspended substance in pond is more fully contacted with water, in addition by the agitaion of gas and clear water back flushing, can effectively to the aging microbial film of filling surface growth, wash away, impel biomembranous update, make microbial film maintain higher activity.
(6) re-electrolysis
Medium sediment pool 14 water outlets again enter electrolysis machine 15 and carry out electrolysis, make to be difficult to biochemical larger molecular organics through electrolysis generation open loop chain scission in waste water, are converted into and are easy to biochemical small organic molecule, improve B/C; The adjacent two interelectrode voltages of electrolysis machine 15 are 2V, and current density is 200mA/cm 2.
(7) BAF biochemical (BAF is biochemical)
Waste water after re-electrolysis enters BAF 16, by oxidation degradation effect, waste water is purified, and further removes COD, SS and ammonia nitrogen, is purified waste water.
(8) sterilization
Waste water is after BAF 16 biochemical treatments, and water outlet is promoted to electrosterilization pond 17 by lift pump 25 and processes, and can further remove colourity, and waste water is carried out to sterilization and disinfection, finally by discharge canal 18 qualified discharges.
(9) sludge treatment
The mud that during UASB anaerobic pond 10 in step (3) anaerobic treatment, step (5) A/O process, anoxic pond 12, Aerobic Pond 13 and medium sediment pool 14 and the biochemical treatment of step (7) aeration biochemical filter tank produce all enters sludge sump 20 by pipeline, then the dehydration through sludge filter press 21 makes reducing sludge volume, after dehydration, mud cake carries out burning disposal, and filtrate is back to the equalizing tank 8 in the chemical decalcification of step (2).
Effluent quality index is as shown in table 6 after measured.
The water-quality guideline of table 6 water outlet
Sequence number Project Unit Measured value Sequence number Project Unit Measured value
1 BOD 5 mg/L 12 5 Colourity Doubly 20
2 COD Cr mg/L 50 6 Ca 2+ mg/L 48
3 SS mg/L 70 7 Water temperature 25
4 PH value ? 6 ? ? ? ?

Claims (4)

1. the treatment process of tobacco sheet factory effluent, it comprises the following steps:
(1) slagging-off
Tobacco sheet factory effluent enters mechanical coarse rack water collecting basin after pipeline is collected, coarse rack is set in pond, cursory thing thick in sewage is isolated to removal, then pass through lift pump, tobacco sheet factory effluent is promoted in rotating machinery grid maker, by the filtration of filter screen, further removes the suspended substance of most of insolubility in water, generation every slag packing outward transport, waste water carries out air supporting through air flotation pool, and macrobead fiber in waste water and other suspended substances are carried out to separation;
(2) chemical decalcification
Air flotation pool water outlet flows into one-level decalcification reaction tank through pipeline, through chemicals dosing plant, under agitation first add the saturated settled solution of appropriate lime adjust pH to 8.5~9.5, remove after supercarbonate, flow into secondary decalcification reaction tank, pass into the gas that in step (3) anaerobic treatment, UASB anaerobic pond produces, make CO in gas 2react with calcium ions and magnesium ions and generate carbonate deposition, or add the Na of 100 ~ 400mg/L 2cO 3carbonate is reacted with calcium ions and magnesium ions and generate carbonate deposition, water outlet first adds the FeSO of 5 ~ 10mg/L after flowing into coagulation basin under agitation condition 4, then add Na 2cO 3anti-adjust pH to 8~9, the PAM that finally adds 2 ~ 3mg/L, after reacting completely, enter preliminary sedimentation tank and carry out precipitate and separate, throw out in preliminary sedimentation tank is sent in sludge sump through pump and pipeline, finally in sludge dehydration device, carry out filtering separation, and reclaim calcium carbonate, preliminary sedimentation tank water outlet enters equalizing tank;
(3) anaerobic treatment
Equalizing tank water outlet is promoted to hydrolysis acidification pool through lift pump, at hydrolysis acidification pool, stop certain hour, utilize acid-producing bacteria that the acidication under the effect of acid-producing bacteria of the larger molecular organics in waste water is become to small molecular organic acid, then through lift pump, enter UASB anaerobic pond, through anerobe in UASB anaerobic pond, the absorption of double oxygen bacterium, fermentation, produce under methane acting in conjunction organic acid is resolved into methane and carbon dioxide, the methane and carbon dioxide producing imports the secondary decalcification reaction tank in the chemical decalcification of step (2) after gas collector is collected, after purifying, secondary decalcification reaction tank reclaims biogas in gas holder, waste water enters step (4),
(4) electrolysis
The water outlet of UASB anaerobic pond enters electrolysis machine a and carries out electrolysis, and the adjacent two interelectrode voltages of electrolysis machine a are 2~12V, and current density is 10~320mA/cm 2;
(5) A/O processes
Electrolysis water outlet enters anoxic pond successively, Aerobic Pond and medium sediment pool, and the part mud of medium sediment pool is back to anoxic pond by reflux pump, utilize anoxic, under the alternating action of aerobic microbiological, can carry out denitrogenation dephosphorizing, and by the organism in the further oxygenolysis waste water of aerobic treatment, the degree of depth is removed COD and BOD, in Aerobic Pond, evenly fill up a large amount of biological suspended packings, for providing, aerobic microbiological perches, the place of growth and breeding, so that microorganism forms microbial film at filling surface, in Aerobic Pond bottom, be provided with aeration aerating stirring system, sewage is carried out to oxygenation, make the dissolved oxygen in water maintain 2~4 mg/L, the effect that simultaneously utilizes gas to rise, suspended substance in pond is more fully contacted with water, in addition by the agitaion of gas and clear water back flushing, can effectively to the aging microbial film of filling surface growth, wash away, impel biomembranous update, make microbial film maintain higher activity,
(6) re-electrolysis
Medium sediment pool water outlet again enters electrolysis machine b and carries out electrolysis, and electrolysis machine b is adjacent, and two interelectrode voltages are 2~6V, and current density is 20~200mA/cm 2;
(7) BAF biochemical (BAF is biochemical)
Waste water after re-electrolysis enters BAF, by oxidation degradation effect, waste water is purified, and further removes COD, SS and ammonia nitrogen, is purified waste water;
(8) sterilization
Waste water is after BAF biochemical treatment, and water outlet is processed through electrosterilization pond again, can further remove colourity, and waste water is carried out to sterilization and disinfection, last qualified discharge;
(9) sludge treatment
The mud that during UASB anaerobic pond in step (3) anaerobic treatment, step (5) A/O process, anoxic pond, Aerobic Pond and medium sediment pool and step (7) BAF biochemical treatment produce all enters sludge sump by pipeline, then the dehydration through sludge filter press makes reducing sludge volume, after dehydration, mud cake carries out burning disposal, and filtrate is back to the equalizing tank in the chemical decalcification of step (2).
2. the treatment process of tobacco sheet factory effluent according to claim 1, is characterized in that: described in step (1) slagging-off, air supporting is a kind of of gas distribution By Bubble-floating Method, electric floating method, biology and chemical floatation treatment, dissolved air flotation.
3. the treatment process of tobacco sheet factory effluent as claimed in claim 1, it is characterized in that: electrolysis machine a and the electrolysis machine b of step (4) and step (6) are equipped with power supply and electrolyzer, the electrode materials in described electrolyzer is a kind of in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic noble electrode.
4. the treatment process of tobacco sheet factory effluent as claimed in claim 3, it is characterized in that: the top layer of described nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10~35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
CN201310212180.5A 2013-05-31 2013-05-31 Treatment method of tobacco sheet production wastewater Expired - Fee Related CN103241910B (en)

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