CN102531285A - Process for treating high-concentration organic wastewater of paper-making reconstituted tobacco - Google Patents
Process for treating high-concentration organic wastewater of paper-making reconstituted tobacco Download PDFInfo
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- CN102531285A CN102531285A CN2011104584696A CN201110458469A CN102531285A CN 102531285 A CN102531285 A CN 102531285A CN 2011104584696 A CN2011104584696 A CN 2011104584696A CN 201110458469 A CN201110458469 A CN 201110458469A CN 102531285 A CN102531285 A CN 102531285A
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Abstract
The invention relates to a process for treating high-concentration organic wastewater of paper-making reconstituted tobacco. The process comprises the conventional wastewater treatment process, and a redundant extraction solution pretreatment process. The redundant extraction solution pretreatment process comprises the steps of (1) feeding redundant extraction solution to a collection reaction tank, and introducing microbes to treat the redundant extraction solution; (2) feeding the reaction solution treated by step (1) to a electrolytic cell for electrolysis; (3) feeding the reaction solution treated by step (2) to a coagulation tank, and adding drugs for reaction; and (4) mixing the reaction solution treated by step (3) with sludge produced in the conventional wastewater treatment process, and filter-pressing by a sludge dewatering system of the conventional wastewater treatment process. The process provided by the invention has the advantage that the process can pre-treat the redundant extraction solution independently to lower COD (chemical oxygen demand) concentration, so that the COD of the high-concentration organic wastewater can be reduced by more than 90%, and the remaining wastewater with high degradability and good biochemical property is treated by the conventional wastewater treatment process.
Description
Technical field
The present invention relates to a kind of sewage treatment process, the high dense organic sewage treatment process of the tobacco extract that particularly a kind of papermaking-method reconstituted tobaccos production process produces.
Background technology
In the existing technology, relating to and utilize offal and tobacco leaf fragment to add a spot of wood pulp cellulose, utilize the technology of papermaking to make reconstituted tobacco as main raw material. above-mentioned technology will produce large amount of sewage in production process,
It is mainly formed: the discharging of unnecessary extracting solution when the discharging of enriched water and raw material extract during paper machine making.
Wherein unnecessary extracting solution: chemical oxygen demand COD is about: 700000-100000mg/L, the product that every production is a ton need discharge unnecessary extracting solution 1-1.5 ton approximately.
And the enriched water that produces during paper machine making: chemical oxygen demand COD is about 2000--4000mg/L, and the product that every production is a ton need discharge the 20--40 ton approximately.
Unnecessary extracting solution discharging accounts for total chemical oxygen demand COD quantity discharged 50%. and wherein contains a large amount of hardly degraded organic substance compositions, is the major reason that causes the WWT difficulty.
And the reason that causes unnecessary extracting solution discharging to account for total chemical oxygen demand COD quantity discharged 50% is; Generally speaking; The WWT of present domestic papermaking-method reconstituted tobaccos production line is generally: the enriched water discharging mixes with unnecessary extracting solution discharging to be handled. and mixed sewage chemical oxygen demand COD reaches 5000--8000mg/L; With unnecessary extracting solution and separately discharging of enriched water; And effectively reducing the chemical oxygen demand COD content of unnecessary extracting solution, is to reduce sewage chemical oxygen demand COD content at present, reduces the primary technical barrier that solves of sewage pollution.
Summary of the invention
The object of the present invention is to provide the high dense organic sewage treatment process of a kind of papermaking-method reconstituted tobaccos, it comprises conventional sewage treatment process, and it also comprises the pretreatment technology of unnecessary extracting solution, and described unnecessary extracting solution pretreatment technology step comprises:
(1), unnecessary extracting solution imported collects reaction tank, and insert microbiological treatment;
(2), the reaction solution of step (1) being handled is inducted into and carries out electrolysis in the electrolyzer;
(3), the reaction solution of step (2) being handled is introduced dosing reaction in the coagulation basin;
(4), after the mud that produces in the reaction solution of step (3) being handled and the conventional sewage treatment process mixes again the sludge dewatering system through conventional sewage treatment process carry out press filtration.
The advantage that the present invention had is: can pass through the independent pre-treatment of unnecessary extracting solution; Reduce the concentration of chemical oxygen demand COD; Wherein can make the chemical oxygen demand COD of high dense organic sewage obtain removing more than 90%; Mostly remaining composition is to be prone to the good sewage of degraded biochemical, gets into original WWT flow process and handles.
Description of drawings
Fig. 1 is a papermaking-method reconstituted tobaccos production-line technique general flow chart,
The process flow sheet of the existing WWT of Fig. 2,
The process flow sheet of the WWT after Fig. 3 improves.
Embodiment
Shown in Fig. 2-3: it comprises conventional WWT, it is characterized in that: it also comprises the pre-treatment of unnecessary extracting solution, and described unnecessary extracting solution pre-treatment step comprises:
(1), unnecessary extracting solution imported collects reaction tank, and insert microbiological treatment;
Concrete steps are: concrete operation method is: choose mikrobe, put into the unnecessary extracting solution of collecting reaction tank and carry out biological respinse. reacted at normal temperatures 2-7 days, and wherein threw in the mikrobe of 0.05～0.2 gram in the premium on currency.Mikrobe can freely grow in above-mentioned environment, and this step wherein macromolecular substance of can degrading makes it can be by follow-up anaerobism and aerobic biodegradation.Though originally also contain a small amount of mikrobe in the extracting solution, can carry out decomposition reaction, because quantity is few, reaction time is long, in general, through increasing external mikrobe, can shorten the whole cycle, improves reaction effect.
(2), the reaction solution of step (1) being handled is inducted into and carries out electrolysis in the electrolyzer; In the reaction solution that step 1 is handled, add 5-35 volt electrolysis voltage, electrolysis time 10-120 minute; Can improve the biochemical oxygen demand BOD and the chemical oxygen demand COD ratio of sewage like this; In general, electrolytic reaction can improve biochemical oxygen demand BOD and chemical oxygen demand COD ratio 5-10%, and this step can be improved the biodegradability of reaction solution.
(3), the reaction solution of step (2) being handled is introduced dosing reaction in the coagulation basin; Concrete operation method in the step 3 is: in the reaction solution of coagulation basin, drop into polymer alumina PAC and carry out coagulating; Flocculate to wherein remaining macromole micelle material; Form tiny floss, wherein the weight of polymer alumina PAC is 3～4% of the interior moisture content gross weight of coagulation basin.
(4), the concrete operation method in the step 4 is: the mud liquid that produces in reaction solution and the conventional WWT is 1 by volume: after the ratio of 3.5-6 is mixed; Add SEPIGEL 305 PAM again and mix, carry out press filtration at the sludge dewatering system through conventional WWT more then.The mud liquid blended purpose that wherein produces in reaction solution and the conventional WWT is; Need utilize mud good adsorption ability that some materials are adsorbed; Further intensifying treatment effect; And the adding of SEPIGEL 305 PAM is in order to strengthen the effect of absorption, promoter action to be played in the purification of sewage equally.
Among the present invention; Described conventional sewage treatment process comprise with production waste flow to water collecting basin successively, regulate preparatory acidulated pool, preliminary sedimentation tank, circulatory pool, IC reactor drum, aeration tank, second pond, air-flotation system handle the back discharging; Wherein the mud of preliminary sedimentation tank, second pond, air-flotation system also is sent to the mud mixing pit; The mud returned sluge aeration tank of second pond; Mud in the mud mixing pit is sent to sludge dewatering system again, is back to through reservoir by the filtering filtrating of sludge dewatering system and regulates preparatory acidulated pool, sends outside through the mud of sludge dewatering system dehydration; Wherein regulate preparatory acidulated pool, preliminary sedimentation tank, circulatory pool, air-flotation system, sludge dewatering system and all need dosing; Water collecting basin to regulate preparatory acidulated pool, regulate preparatory acidulated pool to preliminary sedimentation tank, circulatory pool to IC reactor drum (anaerobic biological), second pond to air-flotation system, mud mixing pit to sludge dewatering system, reservoir all be provided with pump to regulating preparatory acidulated pool.Conventional WWT is existing common practice, and the quantity of pump and position can be adjusted according to specific circumstances.Other detail section can be finely tuned as the case may be.For example, can the flow process that contain pump be replaced with the difference of altitude of each system of adjustment, utilize the difference of altitude of liquid level to carry out the gravity flow of liquid.
The present invention will be described below in conjunction with specific embodiment:
To the present sewage that discharges, extract unnecessary extracting solution separately and experimentize:
Embodiment 1
(1) reacts in the environment with the unnecessary extracting solution importing of the 1L that gathers simulation collection reaction tank, and insert microbiological treatment; Through detecting, the chemical oxygen demand COD of the unnecessary extracting solution of this collection is about 100000mg/L, puts under the condition of mikrobe of 0.1 gram 4 days reaction times in each premium on currency.
(2), the reaction solution of step (1) being handled is inducted into and carries out electrolysis in the electrolyzer;
Concrete operations are in the reaction solution that step 1 is handled, and add 15 volts of electrolysis voltages, electrolysis time 120 minutes, and the biochemical oxygen demand BOD and the chemical oxygen demand COD ratio of sewage have improved 8%;
(3), the reaction solution of step (2) being handled is introduced dosing reaction in the coagulation basin; In the reaction solution of coagulation basin, drop into polymer alumina PAC and carry out coagulating, flocculate to wherein remaining macromole micelle material, form tiny floss, wherein the weight of polymer alumina PAC is 4% of the interior moisture content gross weight of coagulation basin;
(4), the mud liquid that produces in reaction solution that step 3 is obtained and the conventional WWT; Be after 1: 3.5 ratio is mixed by volume; Add SEPIGEL 305 PAM again and mix, carry out press filtration at the sludge dewatering system through conventional WWT more then.
Experiment shows that the chemical oxygen demand COD of the unnecessary extracting solution after the processing is about 7000mg/L, and chemical oxygen demand COD obtains removing more than 93%.
Embodiment 2
(1) reacts in the environment with the unnecessary extracting solution importing of the 3L that gathers simulation collection reaction tank, and insert microbiological treatment; Through detecting, the chemical oxygen demand COD of the unnecessary extracting solution of this collection is about 80000mg/L, puts under the condition of enzyme of 0.05 gram 7 days reaction times in each premium on currency.
(2), the reaction solution of step (1) being handled is inducted into and carries out electrolysis in the electrolyzer;
Concrete operations are in the reaction solution that step 1 is handled, and add 25 volts of electrolysis voltages, electrolysis time 70 minutes, and the biochemical oxygen demand BOD and the chemical oxygen demand COD ratio of sewage have improved 5%.
(3), the reaction solution of step (2) being handled is introduced dosing reaction in the coagulation basin; In the reaction solution of coagulation basin, drop into polymer alumina PAC and carry out coagulating, flocculate to wherein remaining macromole micelle material, form tiny floss, wherein the weight of polymer alumina PAC is 3% of the interior moisture content gross weight of coagulation basin;
(4), the mud liquid that produces in reaction solution that step 3 is obtained and the conventional WWT; Be after 1: 3.5 ratio is mixed by volume; Add SEPIGEL 305 PAM again and mix, carry out press filtration at the sludge dewatering system through conventional WWT more then.
Experiment shows that the chemical oxygen demand COD of the unnecessary extracting solution after the processing is about 4000mg/L, and chemical oxygen demand COD obtains removing more than 95%.
Embodiment 3
(1) reacts in the environment with the unnecessary extracting solution importing of the 3L that gathers simulation collection reaction tank, and insert microbiological treatment; Through detecting, the chemical oxygen demand COD of the unnecessary extracting solution of this collection is about 95000mg/L, puts under the condition of enzyme of 0.2 gram 2 days reaction times in each premium on currency.
(2), the reaction solution of step (1) being handled is inducted into and carries out electrolysis in the electrolyzer;
Concrete operations are in the reaction solution that step 1 is handled, and add 30 volts of electrolysis voltages, electrolysis time 60 minutes, and the biochemical oxygen demand BOD and the chemical oxygen demand COD ratio of sewage have improved 10%.
(3), the reaction solution of step (2) being handled is introduced dosing reaction in the coagulation basin; In the reaction solution of coagulation basin, drop into polymer alumina PAC and carry out coagulating, flocculate to wherein remaining macromole micelle material, form tiny floss, wherein the weight of polymer alumina PAC is 3.5% of the interior moisture content gross weight of coagulation basin;
(4), the mud liquid that produces in reaction solution that step 3 is obtained and the conventional WWT, be after 1: 6 ratio is mixed, to add SEPIGEL 305 PAM mixing more by volume, carry out press filtration at the sludge dewatering system through conventional WWT more then.
Experiment shows that the chemical oxygen demand COD of the unnecessary extracting solution after the processing is about 9000mg/L, and chemical oxygen demand COD obtains removing more than 92%.
Claims (6)
1. the high dense organic sewage treatment process of a papermaking-method reconstituted tobaccos, it comprises conventional sewage treatment process, it is characterized in that: it also comprises the pretreatment technology of unnecessary extracting solution, described unnecessary extracting solution pretreatment technology step comprises:
(1), unnecessary extracting solution imported collects reaction tank, and insert microbiological treatment;
(2), the reaction solution of step (1) being handled is inducted into and carries out electrolysis in the electrolyzer;
(3), the reaction solution of step (2) being handled is introduced dosing reaction in the coagulation basin;
(4), after the mud that produces in the reaction solution of step (3) being handled and the conventional sewage treatment process mixes again the sludge dewatering system through conventional sewage treatment process carry out press filtration.
2. the high dense organic sewage treatment process of papermaking-method reconstituted tobaccos according to claim 1; It is characterized in that: described conventional sewage treatment process comprise with production waste flow to water collecting basin successively, regulate preparatory acidulated pool, preliminary sedimentation tank, circulatory pool, IC reactor drum, aeration tank, second pond, air-flotation system handle the back discharging; Wherein the mud of preliminary sedimentation tank, second pond, air-flotation system also is sent to the mud mixing pit; The mud returned sluge aeration tank of second pond; Mud in the mud mixing pit is sent to sludge dewatering system again, is back to through reservoir by the filtering filtrating of sludge dewatering system and regulates preparatory acidulated pool, sends outside through the mud of sludge dewatering system dehydration; Wherein regulate preparatory acidulated pool, preliminary sedimentation tank, circulatory pool, air-flotation system, sludge dewatering system and all need dosing; Water collecting basin to regulate preparatory acidulated pool, regulate preparatory acidulated pool to preliminary sedimentation tank, circulatory pool to IC reactor drum, second pond to air-flotation system, mud mixing pit to sludge dewatering system, reservoir all be provided with pump to regulating preparatory acidulated pool.
3. the high dense organic sewage treatment process of papermaking-method reconstituted tobaccos according to claim 1; It is characterized in that: the concrete operation method in the step 1 is: choose mikrobe; Put into the unnecessary extracting solution of collecting reaction tank and carry out biological respinse. reacted at normal temperatures 2-7 days, and wherein threw in the mikrobe of 0.05～0.2 gram in the premium on currency.
4. the high dense organic sewage treatment process of papermaking-method reconstituted tobaccos according to claim 1; It is characterized in that: the concrete operation method in the step 2 is:; In the reaction solution that step 1 is handled; Add 5-35 volt electrolysis voltage, electrolysis time 10-120 minute, the biochemical oxygen demand BOD of sewage and chemical oxygen demand COD ratio improved 5-10%.
5. the high dense organic sewage treatment process of papermaking-method reconstituted tobaccos according to claim 1; It is characterized in that: the concrete operation method in the step 3 is: in the reaction solution of coagulation basin, drop into polymer alumina PAC and carry out coagulating; Flocculate to wherein remaining macromole micelle material; Form tiny floss, wherein the weight of polymer alumina PAC is 3～4% of the interior moisture content gross weight of coagulation basin.
6. the high dense organic sewage treatment process of papermaking-method reconstituted tobaccos according to claim 1; It is characterized in that: the concrete operation method in the step 4 is: the mud liquid that produces in reaction solution and the conventional WWT; Be 1 by volume: after the ratio of 3.5-6 is mixed; Add SEPIGEL 305 PAM again and mix, carry out press filtration at the sludge dewatering system through conventional WWT more then.
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Cited By (5)
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| CN103241909A (en) * | 2013-05-31 | 2013-08-14 | 波鹰(厦门)科技有限公司 | Process device for waste water generated in tobacco sheet production |
| CN103630609A (en) * | 2013-11-29 | 2014-03-12 | 新兴铸管股份有限公司 | Ultrasonic testing circulating water purification system |
| 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 |
| CN107285460A (en) * | 2017-08-21 | 2017-10-24 | 梧州学院 | Household domestic sewage treating method and its system based on PLC and SBR |
| CN110916238A (en) * | 2019-12-05 | 2020-03-27 | 云南中烟工业有限责任公司 | Tobacco stem pretreatment method applied to high-speed paper machine and white cardboard for cigarettes |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103241909A (en) * | 2013-05-31 | 2013-08-14 | 波鹰(厦门)科技有限公司 | Process device for waste water generated in tobacco sheet production |
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| CN103630609A (en) * | 2013-11-29 | 2014-03-12 | 新兴铸管股份有限公司 | Ultrasonic testing circulating water purification system |
| CN107285460A (en) * | 2017-08-21 | 2017-10-24 | 梧州学院 | Household domestic sewage treating method and its system based on PLC and SBR |
| CN110916238A (en) * | 2019-12-05 | 2020-03-27 | 云南中烟工业有限责任公司 | Tobacco stem pretreatment method applied to high-speed paper machine and white cardboard for cigarettes |
| CN110916238B (en) * | 2019-12-05 | 2022-07-01 | 云南中烟工业有限责任公司 | Tobacco stem pretreatment method applied to high-speed paper machine and white cardboard for cigarettes |
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