CN103241911A - Treatment device for tobacco sheet production wastewater - Google Patents
Treatment device for tobacco sheet production wastewater Download PDFInfo
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Abstract
The invention discloses a treatment device for tobacco sheet production wastewater. The treatment device comprises a mechanical coarse screen water collecting tank, a rotary grillage machine, an air-flotation tank, a primary de-calcification reaction tank, a secondary de-calcification reaction tank, a coagulating basin, a primary settling tank, an adjusting tank, a hydrolysis acidification tank, a UASB (Upflow Anaerobic Sludge Blanket) anaerobic tank, an electrolysis machine a, an oxygen-poor tank, an aerobic tank, a medium settling tank, an electrolysis machine b, a biological aerated filter (BAF), an electrolysis disinfecting tank, a sludge tank, a sludge dehydrating tank, an accident tank, a gas collecting device and a biogas storage tank. The invention provides the treatment device based on the combination of a chemical de-calcification technology, a biochemical technology, an electrochemical technology and a BAF technology, which is lower in cost, higher in efficiency and capable of exhausting the wastewater reaching the standards.
Description
Technical field
The present invention relates to a kind for the treatment of unit of tobacco sheet factory effluent, particularly relate to a kind ofly based on the tobacco sheet factory effluent of chemical decalcification technology, Measurement for Biochemistry, electrochemical techniques and BAF technology and the treatment unit 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 to the production process of making cigarette, can produce the particle that accounts for former cigarette material total amount 1/3 greatly from preliminary working, and these tobacco particles can't directly be made cigarette product as raw material again.In order to reduce the comprehensive utilization that waste material produces, realizes particle, the tobacco sheet technology is arisen at the historic moment.Tobacco sheet, having another name called reconstituted tobacco (Reconstituted Tobacco), is to utilize tobacco materials such as offal, offal, tobacco cut to make sheet or thread reconstituted product for raw material, as cigarette filler, reduce the tar content in the cigarette, reduce the Health hazard that smoking brings to human body.The use of tobacco sheet has the tobacco quality of raising, reduces the cigarette cost, saves 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, the paper process thin slice has remarkable advantages: reduce production of cigarettes cost, constant product quality, filling value and becomes a silk rate height, anti-machining property good, improved the combustionvelocity of cigarette and reduced releasing content of coke tar, product plasticity-is high and more easily process, and is effective technology of present production " health type " cigarette.Have roll-in method and the incomparable advantage of thick slurry method just because of the papermaking thin slice, therefore all obtained extensive popularization at home and abroad.
The general character of the existing paper waste of waste water that produces in the tobacco sheets by paper making method production process is as containing a large amount of fibers, have again simultaneously that tobacco wastewater colourity height, biodegradability are relatively poor, contain to characteristics such as the disadvantageous nicotine of microorganism growth and the high 150～500mg/L of calcium-magnesium content main contamination index such as following table in the waste water:
Waste strength fluctuation simultaneously is bigger, and CODcr is from 1500～25000mg/L, and SS is from 1000～15000mg/L, and nicotine and tar suppress microorganism growth, and the calcium-magnesium content height causes reactor fouling normally not move, and belongs to the difficult organic waste water of high density.
Chinese patent CN1683261A discloses a kind for the treatment of process of tobacco sheets by paper making method factory effluent, 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 tobacco sheets by paper making method factory effluent, and this technology may further comprise the steps: by the grid coarse filtration, gravity flow enters wastewater equalization pond with factory effluent; By lift pump the waste water in the wastewater equalization pond is promoted to and adds Ca-diatom soil series compound flocculating agent reaction 5-10min in the coagulator, add bodied ferric sulfate then, the polyacrylamide separating agent enters the reaction of static reaction pond, the reaction times is 50-60min; Be to pump in the ultrasonic micro-electrolysis reactor after the slant acidity with the pH regulator of the organic waste water of lower concentration, react jointly by ultrasonic wave and little electrolysis that the chemical oxygen demand material is cleared up fast, and the reaction times is 30-60min; Again with waste water process charcoal absorption and quartz sand filtration; The mud that equalizing tank and static reaction pond workshop section are produced is handled the back through overlapping screwed sludge dewatering equipment and is used as solid fuel.
Disclose the tobacco sheets by paper making method factory effluent among the Chinese patent CN10133045A and to three-stage filtration, be back to slurrying workshop section through one more respectively, reuse water adopts the method that regularly is thrown into sewage works, but factory effluent loops back for the production of influencing the thin slice quality greatly.
Chinese patent CN1683261A discloses the tobacco sheets by paper making method factory effluent and has removed wherein suspended solid through coagulating treatment, air supporting method earlier, sends into the most COD material is removed in the aeration tank by aerobic microbiological method then.
Above method all has certain effect to the processing of tobacco sheet factory effluent, technical process is long, facility investment is big, floor space is big but exist, defectives such as working cost height, more seriously owing to contain a large amount of calcium in the waste water, directly cause a large amount of foulings of biochemical treatment system and film separating system, system can't normally move, and the waste discharge after existing wastewater processing technology is handled all can not reach emission standard.
Summary of the invention
The objective of the invention is in the existing tobacco production wastewater treatment method existing establish technical process long, be equipped with that investment is big, floor space is big, working cost is high, biochemical treatment system and film processing system be because fouling can not normally move, defectives such as the waste discharge after the processing is not up to standard, providing a kind of combines with the BAF technology based on chemical decalcification technology, Measurement for Biochemistry, electrochemical techniques, cost is lower, usefulness is higher, makes it the treatment unit of the tobacco factory effluent of qualified discharge.
A kind for the treatment of unit of tobacco sheet factory effluent is provided with mechanical coarse rack water collecting basin, rotation grid maker, air flotation pool, one-level decalcification reaction tank, secondary decalcification reaction tank, coagulation basin, preliminary sedimentation tank, equalizing tank, hydrolysis acidification pool, UASB anaerobic pond, electrolysis machine a, anoxic pond, Aerobic Pond, medium sediment pool, electrolysis machine b, BAF (BAF), electrosterilization pond, sludge sump, sludge dehydration device, accident pool, gas collector and biogas gas holder;
The import of described mechanical coarse rack water collecting basin connects with the outlet of tobacco wastewater, machinery coarse rack water collecting basin water outlet connects with rotation grid maker water-in, rotation grid maker water outlet connects with the air flotation pool water-in, the air flotation pool water outlet connects with one-level decalcification reaction tank water-in, one-level decalcification reaction tank water outlet connects with secondary decalcification reaction tank water-in, secondary decalcification reaction tank water outlet connects with the coagulation basin water-in, the coagulation basin water outlet connects with the preliminary sedimentation tank water-in, the preliminary sedimentation tank water outlet connects with the equalizing tank water-in, the equalizing tank water outlet connects with the hydrolysis acidification pool water-in, the hydrolysis acidification pool water outlet connects with UASB anaerobic pond water-in, UASB anaerobic pond water outlet connects with electrolysis machine a water-in, electrolysis machine a water outlet connects with the anoxic pond water-in, the anoxic pond water outlet connects with the Aerobic Pond water-in, the Aerobic Pond water outlet connects with the medium sediment pool water-in, the medium sediment pool water outlet connects with electrolysis machine b water-in, electrolysis machine b water outlet connects with BAF (BAF) water-in, the BAF water outlet connects with electrosterilization pond water-in, and electrosterilization pond water outlet connects with discharge channel; The water-in of accident pool connects with the outlet of tobacco sheet factory effluent, and the accident pool water outlet connects with mechanical coarse rack water collecting basin water-in; UASB anaerobic pond pneumatic outlet connects with the gas collector import, and the gas collector outlet connects with secondary decalcification reaction tank water-in, and the pneumatic outlet of secondary decalcification reaction tank connects with the import of biogas gas holder; Throw out in preliminary sedimentation tank, UASB anaerobic pond, anoxic pond, Aerobic Pond, medium sediment pool and the aeration biochemical filter tank (being mud) outlet all connects with the sludge sump import, and the sludge sump outlet connects with the sludge dehydration device import.
Described air flotation pool is a kind of in gas distribution air flotation pool, electric air flotation pool, biology and chemical air flotation pool or the air-dissolving air-float pond.
Described coagulation basin has dispensing system and medicine system.
Described electrolysis machine a and electrolysis machine b are equipped with power supply and electrolyzer; Electrode materials in the described electrolyzer is a kind of in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and the 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.
Technical scheme of the present invention is: tobacco sheet factory effluent → slagging-off → chemical decalcification → anaerobic treatment → electrolysis → A/O processing → re-electrolysis → BAF biochemistry → electrosterilization → qualified discharge.
Waste water is as shown in the table through the effect of above processing:
Compared with the prior art, have following outstanding advantage:
(1) after the reaction of the one-level decalcification by chemical decalcification system removes false hardness (supercarbonate), make carbonate and calcium ions and magnesium ions reaction generate carbonate deposition through secondary decalcification reaction tank again, carbonate deposition takes off surely and FeSO in coagulation basin then
4Flocculate mutually with polyphenyl alkene acid amides coagulant aidss such as (PAM), be gathered into thick alumina blossom particles, in preliminary sedimentation tank, settle down, high-concentration Ca, magnesium ion in the final effective elimination tobacco sheet factory effluent, clearance reaches 50 ~ 90%, reduces water hardness, makes Ca
2+Be lower than 50 mg/L, prevent equipment scaling, guarantee that follow-up biochemical treatment and electrolysis process are smooth, steady running.
(2) after the UASB system for anaerobic treatment was handled, indexs such as the COD in the waste water, BOD reduced significantly, imported the secondary decalcification reaction tank in the chemical decalcification after the gas of generation is collected through gas collector, made CO in the gas
2Generate carbonate deposition with the calcium ions and magnesium ions reaction, reclaim CO in the gas on the one hand
2, make gas be utilized effectively; On the other hand by the H in the secondary decalcification reaction tank removal gas
2S, Purge gas, biogas is collected by gas holder and is utilized or high altitude discharge.
(3) through after slagging-off and the processing of chemical decalcification system, the SS clearance in the waste water reaches more than 95%, and the SS in the equalizing tank significantly reduces, and avoids the deposition of mud in equalizing tank, alleviates and moves clear mud workload at ordinary times.
(4) the strong oxidizing property free radical that produces by the nano-catalytic electrolysis makes the difficult biochemical macromolecular cpd open loop chain rupture in the waste water, become can be biochemical small molecules, further improve the B/C value, improve the condition of follow-up biochemical treatment, and remove colourity and stink in the waste water, reduce indexs such as ammonia nitrogen, COD.
(5) through the A/O biochemistry pool, by the alternating action of anaerobic-aerobic, can carry out denitrogenation dephosphorizing to sewage.
(6) through after the aeration biochemical filter tank biochemical treatment, the oxygenolysis by aerobic microbiological thoroughly decomposes pollutant in water, makes stable effluent quality, qualified discharge.
Description of drawings
Fig. 1 is that the structure of the treatment unit embodiment of tobacco sheet factory effluent of the present invention is formed synoptic diagram.
Embodiment
1 the specific embodiment of the present invention is described with reference to the accompanying drawings.
With reference to Fig. 1, the treatment unit of tobacco sheet factory effluent, it comprises: mechanical coarse rack water collecting basin 1, rotation grid
As can be seen from Figure 1, mechanical coarse rack water collecting basin 1 and transporting outward by packing every slag that rotation grid maker 2 produces.
The present invention be after the comparative study of composition, character and the existing processing scheme of existing tobacco sheet factory effluent being goed deep into system, finish to tobacco sheet production wastewater treatment Design of device, it uses by the combination of methods such as chemical decalcification, biochemistry, electrolysis, BAF, thereby forms a kind for the treatment of unit that is particularly suitable for the tobacco sheet factory effluent.
Provide the specific embodiment of tobacco sheet production wastewater treatment device below in conjunction with Fig. 1.
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 | The pH value | ? | 6.2 | ? | ? | ? | ? |
(1) slagging-off
The tobacco sheet factory effluent enters mechanical coarse rack water collecting basin 1 after pipeline is collected, coarse rack is set in the pond, cursory thing thick in the sewage is isolated removal, to prevent that follow-up treatment facility from stopping up, then by lift pump 22, tobacco sheet factory effluent water is promoted in the rotating machinery grid maker 2, further remove the suspended substance of most of insolubility in the water by the filtration of filter screen, what produce transports outward every the slag packing, waste water then passes through air flotation pool 3, macrobead fiber in the waste water and other suspended substances are separated, alleviate the processing load of subsequent technique greatly.
(2) chemical decalcification
(3) anaerobic treatment
Equalizing tank 8 water outlets are promoted to hydrolysis acidification pool 9 through lift pump 23, stop certain hour at hydrolysis acidification pool 9, utilize acid-producing bacteria that the acidication under the effect of acid-producing bacteria of the larger molecular organics in the waste water is become small molecular organic acid, enter UASB anaerobic pond 10 through lift pump 24 then, 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 carbonic acid gas in the process UASB anaerobic pond 10, by the B/C value of anaerobic treatment raising waste water, improve the biodegradability of waste water; Secondary decalcification reaction tank 5 after the methane that produces and carbonic acid gas are collected through gas collector 27 in the chemical decalcification of importing step (2) removes carbonic acid gas, hydrogen sulfide, the mercaptan compound impurity in the biogas, purifies the back and reclaims biogas in gas holder 28; Waste water then enters step (4).
(4) electrolysis
10 water outlets of UASB anaerobic pond enter electrolysis machine a11 and carry out electrolysis, to remove colourity, smelly, make the difficult biochemical macromolecular cpd open loop chain rupture in the waste water simultaneously, become can be biochemical small molecules, except part ammonia nitrogen, COD, further improve the B/C value, improve the condition of follow-up biochemical treatment; Adjacent two interelectrode voltages of electrolysis machine are 3V, and current density is 300mA/cm
2
(5) A/O handles
The 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 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; Evenly fill up a large amount of biological suspension fillers in the Aerobic Pond 13, perch for aerobic microbiological provides, the place of growth and breeding, so that microorganism forms microbial film at filling surface.Be provided with the aeration aerating stirring system in Aerobic Pond 13 bottoms, sewage is carried out oxygenation, make the dissolved oxygen in the water maintain 2～4 mg/L, the effect that utilizes gas to rise simultaneously, suspended substance in the pond is contacted with water is more abundant, and by the agitaion of gas and clear water back flushing, the aging microbial film that can effectively grow to filling surface washes away in addition, impel biomembranous update, make microbial film keep higher activity.
(6) re-electrolysis
(7) BAF biochemistry (BAF biochemistry)
Waste water after the re-electrolysis enters BAF 16, by the oxidation degradation effect waste water is purified, and further removes COD, SS and ammonia nitrogen, is purified waste water.
(8) sterilization
After 16 biochemical treatments of waste water process BAF, water outlet is disinfected through electrosterilization pond 17 again, can further remove colourity, and waste water is carried out sterilization and disinfection, last qualified discharge.
(9) sludge treatment
The mud that anoxic pond 12, Aerobic Pond 13 and medium sediment pool 14 and 16 biochemical treatments of step (7) aeration biochemical filter tank produced during UASB anaerobic pond 10, step (5) A/O handled in step (3) anaerobic treatment all enters sludge sump 20 by pipeline, make reducing sludge volume through the dehydration of sludge press filtration machine 21 then, dehydration back mud cake carries out burning disposal, and filtrate then is back to the equalizing tank 8 in the chemical decalcification of step (2).
The 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/ |
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 | The pH value | ? | 6.9 | ? | ? | ? | ? |
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 | The pH value | ? | 6 | ? | ? | ? | ? |
(1) slagging-off
The tobacco sheet factory effluent enters mechanical coarse rack water collecting basin 1 after pipeline is collected, coarse rack is set in the pond, cursory thing thick in the sewage is isolated removal, to prevent that follow-up treatment facility from stopping up, then by lift pump 22, tobacco sheet factory effluent water is promoted in the rotating machinery grid maker 2, further remove the suspended substance of most of insolubility in the water by the filtration of filter screen, what produce transports outward every the slag packing, waste water then passes through air flotation pool 3, macrobead fiber in the waste water and other suspended substances are separated, alleviate the processing load of subsequent technique greatly.
(2) chemical decalcification
Air flotation pool 3 water outlets flow into one-level decalcification reaction tank 4 through pipeline, after chemicals dosing plant under agitation adds the saturated settled solution of an amount of lime adjust pH to 9.5 earlier, removes false hardness (supercarbonate), flow into secondary decalcification reaction tank 5, add the Na of 400mg/L
2CO
3, make the reaction of carbonate and calcium ions and magnesium ions generate carbonate deposition, make CO in the gas
2Generate carbonate deposition with the calcium ions and magnesium ions reaction, water outlet flows into coagulation basin 6 backs add 10mg/L earlier under agitation condition FeSO
4, add Na again
2CO
3Anti-adjust pH to 8.5 adds the polyphenyl alkene acid amides (PAM) of 2.5mg/L at last, enters preliminary sedimentation tank 7 after reacting completely and carries out precipitate and separate, handles calcium ions and magnesium ions in the waste water thereby remove tobacco, 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 the preliminary sedimentation tank 7 (being mud) is sent in the sludge sump 20 through pump and pipeline, carries out filtering separation at last in sludge press filtration machine 21, and reclaims calcium carbonate, and preliminary sedimentation tank 7 water outlets then enter equalizing tank 8.
(3) anaerobic treatment
(4) electrolysis
10 water outlets of UASB anaerobic pond enter electrolysis machine a11 and carry out electrolysis, to remove colourity, smelly, make the difficult biochemical macromolecular cpd open loop chain rupture in the waste water simultaneously, become can be biochemical small molecules, except part ammonia nitrogen, COD, further improve the B/C value, improve the condition of follow-up biochemical treatment; Adjacent two interelectrode voltages of electrolysis machine are 8V, and current density is 150mA/cm
2
(5) A/O handles
The 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 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; Evenly fill up a large amount of biological suspension fillers in the Aerobic Pond 13, perch for aerobic microbiological provides, the place of growth and breeding, so that microorganism forms microbial film at filling surface.Be provided with the aeration aerating stirring system in Aerobic Pond 13 bottoms, sewage is carried out oxygenation, make the dissolved oxygen in the water maintain 2～4 mg/L, the effect that utilizes gas to rise simultaneously, suspended substance in the pond is contacted with water is more abundant, and by the agitaion of gas and clear water back flushing, the aging microbial film that can effectively grow to filling surface washes away in addition, impel biomembranous update, make microbial film keep higher activity.
(6) re-electrolysis
(7) BAF biochemistry (BAF biochemistry)
Waste water after the re-electrolysis enters BAF 16, by the oxidation degradation effect waste water is purified, and further removes COD, SS and ammonia nitrogen, is purified waste water.
(8) sterilization
After 16 biochemical treatments of waste water process BAF, water outlet is disinfected through electrosterilization pond 17 again, can further remove colourity, and waste water is carried out sterilization and disinfection, last qualified discharge.
(9) sludge treatment
The mud that anoxic pond 12, Aerobic Pond 13 and medium sediment pool 14 and 16 biochemical treatments of step (7) aeration biochemical filter tank produced during UASB anaerobic pond 10, step (5) A/O handled in step (3) anaerobic treatment all enters sludge sump 20 by pipeline, make reducing sludge volume through the dehydration of sludge press filtration machine 21 then, dehydration back mud cake carries out burning disposal, and filtrate then is back to the equalizing tank 8 in the chemical decalcification of step (2).
The effluent quality index is as shown in table 4 after measured.
The water-quality guideline of table 4 water outlet
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | BOD 5 | mg/ |
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 | The pH value | ? | 6.5 | ? | ? | ? | ? |
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 | The pH value | ? | 6.5 | ? | ? | ? | ? |
(1) slagging-off
The tobacco sheet factory effluent enters mechanical coarse rack water collecting basin 1 after pipeline is collected, coarse rack is set in the pond, cursory thing thick in the sewage is isolated removal, to prevent that follow-up treatment facility from stopping up, then by lift pump 22, tobacco sheet factory effluent water is promoted in the rotating machinery grid maker 2, further remove the suspended substance of most of insolubility in the water by the filtration of filter screen, what produce transports outward every the slag packing, waste water then passes through air flotation pool 3, macrobead fiber in the waste water and other suspended substances are separated, alleviate the processing load of subsequent technique greatly.
(2) chemical decalcification
Air flotation pool 3 water outlets flow into one-level decalcification reaction tank 4 through pipeline, after chemicals dosing plant under agitation adds the saturated settled solution of an amount of lime adjust pH to 9.0 earlier, removes false hardness (supercarbonate), flow into secondary decalcification reaction tank 5, add the Na of 100mg/L
2CO
3, make the reaction of carbonate and calcium ions and magnesium ions generate carbonate deposition, make CO in the gas
2Generate carbonate deposition with the calcium ions and magnesium ions reaction, water outlet flows into coagulation basin 6 backs add 50mg/L earlier under agitation condition FeSO
4, add Na again
2CO
3Anti-adjust pH to 9.0 adds the polyphenyl alkene acid amides (PAM) of 3mg/L at last, enters preliminary sedimentation tank 7 after reacting completely and carries out precipitate and separate, handles calcium ions and magnesium ions in the waste water thereby remove tobacco, 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 the preliminary sedimentation tank 7 (being mud) is sent in the sludge sump 20 through pump and pipeline, carries out filtering separation at last in sludge press filtration machine 21, and reclaims calcium carbonate, and preliminary sedimentation tank 7 water outlets then enter equalizing tank 8.
(3) anaerobic treatment
(4) electrolysis
10 water outlets of UASB anaerobic pond enter electrolysis machine a11 and carry out electrolysis, to remove colourity, smelly, make the difficult biochemical macromolecular cpd open loop chain rupture in the waste water simultaneously, become can be biochemical small molecules, except part ammonia nitrogen, COD, further improve the B/C value, improve the condition of follow-up biochemical treatment; Adjacent two interelectrode voltages of electrolysis machine are 12V, and current density is 50mA/cm
2
(5) A/O handles
The 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 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; Evenly fill up a large amount of biological suspension fillers in the Aerobic Pond 13, perch for aerobic microbiological provides, the place of growth and breeding, so that microorganism forms microbial film at filling surface.Be provided with the aeration aerating stirring system in Aerobic Pond 13 bottoms, sewage is carried out oxygenation, make the dissolved oxygen in the water maintain 2～4 mg/L, the effect that utilizes gas to rise simultaneously, suspended substance in the pond is contacted with water is more abundant, and by the agitaion of gas and clear water back flushing, the aging microbial film that can effectively grow to filling surface washes away in addition, impel biomembranous update, make microbial film keep higher activity.
(6) re-electrolysis
(7) BAF biochemistry (BAF biochemistry)
Waste water after the re-electrolysis enters BAF 16, by the oxidation degradation effect waste water is purified, and further removes COD, SS and ammonia nitrogen, is purified waste water.
(8) sterilization
After 16 biochemical treatments of waste water process BAF, water outlet is disinfected through electrosterilization pond 17 again, can further remove colourity, and waste water is carried out sterilization and disinfection, last qualified discharge.
(9) sludge treatment
The mud that anoxic pond 12, Aerobic Pond 13 and medium sediment pool 14 and 16 biochemical treatments of step (7) aeration biochemical filter tank produced during UASB anaerobic pond 10, step (5) A/O handled in step (3) anaerobic treatment all enters sludge sump 20 by pipeline, make reducing sludge volume through the dehydration of sludge press filtration machine 21 then, dehydration back mud cake carries out burning disposal, and filtrate then is back to the equalizing tank 8 in the chemical decalcification of step (2).
The 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/ |
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 | The pH value | ? | 6 | ? | ? | ? | ? |
Claims (5)
1. the treatment unit of tobacco sheet factory effluent is characterized in that it comprises mechanical coarse rack water collecting basin, rotation grid maker, air flotation pool, one-level decalcification reaction tank, secondary decalcification reaction tank, coagulation basin, preliminary sedimentation tank, equalizing tank, hydrolysis acidification pool, UASB anaerobic pond, electrolysis machine a, anoxic pond, Aerobic Pond, medium sediment pool, electrolysis machine b, BAF (BAF), electrosterilization pond, sludge sump, sludge dehydration device, accident pool, gas collector and biogas gas holder;
The import of described mechanical coarse rack water collecting basin connects with the outlet of tobacco wastewater, machinery coarse rack water collecting basin water outlet connects with rotation grid maker water-in, rotation grid maker water outlet connects with the air flotation pool water-in, the air flotation pool water outlet connects with one-level decalcification reaction tank water-in, one-level decalcification reaction tank water outlet connects with secondary decalcification reaction tank water-in, secondary decalcification reaction tank water outlet connects with the coagulation basin water-in, the coagulation basin water outlet connects with the preliminary sedimentation tank water-in, the preliminary sedimentation tank water outlet connects with the equalizing tank water-in, the equalizing tank water outlet connects with the hydrolysis acidification pool water-in, the hydrolysis acidification pool water outlet connects with UASB anaerobic pond water-in, UASB anaerobic pond water outlet connects with electrolysis machine a water-in, electrolysis machine a water outlet connects with the anoxic pond water-in, the anoxic pond water outlet connects with the Aerobic Pond water-in, the Aerobic Pond water outlet connects with the medium sediment pool water-in, the medium sediment pool water outlet connects with electrolysis machine b water-in, electrolysis machine b water outlet connects with BAF (BAF) water-in, the BAF water outlet connects with electrosterilization pond water-in, and electrosterilization pond water outlet connects with discharge channel; The water-in of accident pool connects with the outlet of tobacco sheet factory effluent, and the accident pool water outlet connects with mechanical coarse rack water collecting basin water-in; UASB anaerobic pond pneumatic outlet connects with the gas collector import, and the gas collector outlet connects with secondary decalcification reaction tank water-in, and the pneumatic outlet of secondary decalcification reaction tank connects with the import of biogas gas holder; Throw out in preliminary sedimentation tank, UASB anaerobic pond, anoxic pond, Aerobic Pond, medium sediment pool and the aeration biochemical filter tank (being mud) outlet all connects with the sludge sump import, and the sludge sump outlet connects with the sludge dehydration device import.
2. the treatment unit of tobacco sheet factory effluent as claimed in claim 1 is characterized in that: described air flotation pool is a kind of in gas distribution air supporting, electric floating, biological and chemical air supporting or the air-dissolving air-float.
3. the treatment unit of tobacco sheet factory effluent as claimed in claim 1, it is characterized in that: described coagulation basin has dispensing system and medicine system.
4. the treatment unit of tobacco sheet factory effluent as claimed in claim 1, it is characterized in that: described electrolysis machine a and electrolysis machine b are equipped with power supply and electrolyzer, and the electrode materials in the described electrolyzer is a kind of in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and the nano-catalytic inert material.
5. the treatment unit of tobacco sheet factory effluent as claimed in claim 4, 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.
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| CN201310212210.2A CN103241911B (en) | 2013-05-31 | 2013-05-31 | Treatment device for tobacco sheet production wastewater |
| PCT/CN2014/078250 WO2014190874A1 (en) | 2013-05-31 | 2014-05-23 | Apparatus and method for treating tobacco sheet production wastewater |
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| CN201310212210.2A CN103241911B (en) | 2013-05-31 | 2013-05-31 | Treatment device for tobacco sheet production wastewater |
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| WO2014190874A1 (en) * | 2013-05-31 | 2014-12-04 | 波鹰(厦门)科技有限公司 | Apparatus and method for treating tobacco sheet production wastewater |
| CN108328817A (en) * | 2018-02-01 | 2018-07-27 | 江苏库利南实验设备有限公司 | A kind of laboratory sewage disposal device of centralized processing |
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| CN103241911B (en) | 2014-03-12 |
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