CN104743749A - Weakly-alkaline cotton pulp industrial middle-stage wastewater treatment method - Google Patents
Weakly-alkaline cotton pulp industrial middle-stage wastewater treatment method Download PDFInfo
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- CN104743749A CN104743749A CN201510143273.6A CN201510143273A CN104743749A CN 104743749 A CN104743749 A CN 104743749A CN 201510143273 A CN201510143273 A CN 201510143273A CN 104743749 A CN104743749 A CN 104743749A
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Abstract
The invention discloses a weakly-alkaline cotton pulp industrial middle-stage wastewater treatment method. The weakly-alkaline cotton pulp industrial middle-stage wastewater treatment method comprises the following steps: filtering middle-stage wastewater by virtue of a micro filter, primarily removing suspended solids, enabling the middle-stage wastewater to enter an aluminium-carbon internal electrolytic tank, so that biodegradability of the middle-stage wastewater is improved, then enabling the middle-stage wastewater to enter an adjusting tank to homogenize water quality, then enabling the middle-stage wastewater to enter a coagulative precipitation tank 1 to remove colloids and small suspended solids in the middle-stage wastewater, then enabling the middle-stage wastewater to enter a hydrolysis reactor, promoting hardly degradable macromolecular substances in the middle-stage wastewater to be transformed into easily degradable micromolecular substances, then enabling the middle-stage wastewater to enter an anaerobic tank, removing organic matters in the water under the action of obligate anaerobes, then enabling the middle-stage wastewater to enter a multi-stage aerobic tank, further removing organic matters in the middle-stage wastewater under the action of aerobic bacteria, then carrying out solid-liquid separation by virtue of a secondary sedimentation tank, further purifying effluent by virtue of a coagulative precipitation tank 2, enabling the purified effluent to enter an ozone contactor, and decolouring, so that the cotton pulp industrial middle-stage wastewater treatment is completed. Effluent quality can comply with the class A in a table four of Integrated Wastewater Discharge Standard (GB8978-1996).
Description
Technical field
The present invention relates to the treatment process of a kind of meta-alkalescence Cotton Pulp industry middle-stage wastewater, belong to environmental technology field.
Background technology
Cotton Pulp industry middle-stage wastewater refer to slurry after boiling, black liquid extraction in screening, washing and bleaching process the waste water of discharging, it is a series of from shallow palm fibre to deeply brown color that the cellulose and its derivates of stripping makes waste water have.Because the biological degradation of these compounds is very slow, Biochemical Treatment is poor, and middle section water quantity discharged is large, and its process up to standard is the important environmental issue that Cotton Pulp industry faces.
At present, Cotton Pulp stage casing water treatment technology has several as follows:
The technical process of coagulation+second-stage treatment+tertiary treatment is proposed in " paper-making effluent harnessing project technical specifications " HJ2011-2012.The coagulation technological method recommended in specification has: air supporting, precipitation.The second-stage treatment anaerobic technology method of recommending in specification has upflow anaerobic sludge blanket process (UASB), complete hybrid anaerobic reactor (CSTR), and aerobic technological method has oxidation ditch, completely mixed aeration, A/O method etc.The technological method of the tertiary treatment recommended in specification has the technology such as coagulating sedimentation, filtration, Fenton oxidation, ion-exchange, charcoal absorption etc.HJ2011-2012 proposes than more comprehensive Treatment process for the comprehensive regulation of pulping and paper-making industry waste water, but its defect is, not for the feature of middle section water, to propose feasible treatment process route.
Wang Xiang propose neutralization-precipitation-adjustment-air supporting-two-stage acidication-oxidation ditch-two heavy-Cotton Pulp industry middle section water treatment process (the Chinese water supply and drainage of coagulating sedimentation, 27(6): 73-78), water outlet indices all can meet the primary standard of " integrated wastewater discharge standard " (GB 8978-1996).But, above-mentioned route processing be pH be 2-3, COD be 1400mg/L, colourity is the acid middle-stage wastewater of 300 times.
And the typical general meta-alkalescence of cotton pulp handkerchief middle section water, its pH is 9-12, and COD is usually at 1200-2000mg/L, colourity 1000-2000 doubly.And there is no the report of the treatment process about meta-alkalescence, COD concentration is high, colourity is large Cotton Pulp industry middle-stage wastewater at present.
Summary of the invention
The object of the present invention is to provide the treatment process of a kind of meta-alkalescence, COD concentration is high, colourity is large Cotton Pulp industry middle-stage wastewater, make every effluent quality index reach primary standard in " integrated wastewater discharge standard " (GB8978-1996) table 4.
Technical scheme of the present invention
A treatment process for meta-alkalescence Cotton Pulp industry middle-stage wastewater, comprises the steps:
Middle-stage wastewater filters after the preliminary suspended substance removed in middle-stage wastewater through Microfilter, enter aluminium charcoal Inner electrolysis pond, while improving middle-stage wastewater biodegradability, in and middle-stage wastewater pH, then enter equalizing tank and carry out homogenizing water quality, then enter coagulative precipitation tank 1 to carry out removing the colloid in middle-stage wastewater, fine suspension, enter hydrolytic tank again, the difficult degradation macromolecular substance in middle-stage wastewater is impelled to be converted into easy degradation of small molecular material, enter anaerobic pond again, in anaerobic pond obligatory anaerobic bacteria effect under, remove Organic substance in water, and then enter multi-stage aerobic pond, the effect of the aerobic bacteria in multi-stage aerobic pond, organism in further removal middle-stage wastewater, and then after second pond solid-liquid separation, water outlet purifies further through coagulative precipitation tank 2 again, and then enter ozone contact tank and carry out desolventing technology, namely the process of the middle-stage wastewater of Cotton Pulp industry is completed,
In above-mentioned treating processes, the controling parameters of each equipment is as follows:
Described Microfilter, it filters hole is 15 μm;
Described aluminium charcoal Inner electrolysis pond, built-in aluminium charcoal mixed fillers, wherein aluminium wood shavings: the mass ratio of granularity 5 order granulated active carbon is 3:1, and duration of contact is 4.0h;
Described equalizing tank, hydraulic detention time is 8h;
In described coagulative precipitation tank 1: coagulated agent is bodied ferric sulfate (PFS), dosage 50mg/L middle-stage wastewater, and coagulation auxiliary agent is sulfuric acid, its dosage 9 to be advisable to regulate the pH of middle-stage wastewater, and the coagulating time is 30min, and the coagulating sedimentation time is 4.0h;
In described hydrolytic tank, hydraulic detention time is 7.0h, and built-in plastic material, specification are the 3 D elastic filler of φ 120mm, the ight soil nutritive water that volume ratio is 1/30 of the middle-stage wastewater amount of process is added in hydrolytic tank, when adding startup, return sludge ratio, by 50%, must not reflux during normal operation;
In described anaerobic pond, hydraulic detention time is 7.0h, and built-in plastic material, specification are φ 120mm 3 D elastic filler;
In described multi-stage aerobic pond, hydraulic detention time is 14h, and built-in plastic material, specification are φ 120mm 3 D elastic filler, and aeration air water volume ratio is 30:1; When total residence time is constant, pond body is divided into 6-10 lattice, forms multistage continuous complete, during startup, return sludge ratio, by 50%, must not reflux during normal operation;
In described second pond, surface load is 1.0m
3/ m
2.h;
In described coagulative precipitation tank 2, coagulated agent is polymerize aluminum chloride, and the gauge that dosage throws 10mg polymerize aluminum chloride by often liter of middle-stage wastewater is calculated, and the coagulating time is 30min, and the coagulating sedimentation time is 4.0h;
In described ozone contact tank, hydraulic detention time is 1.0h, and the gauge that ozone dosage throws 5mg by often liter of middle-stage wastewater is calculated.
Beneficial effect of the present invention
The treatment process of a kind of meta-alkalescence Cotton Pulp industry middle-stage wastewater of the present invention, compared with prior art, has following characteristics:
(1), before waste water treatment process, adopt Microfilter, considerably reduce the content of fiber fines in waste water, be conducive to subsequent disposal.
(2), have employed aluminium charcoal Inner electrolysis pond, this measure has the benefit of three aspects: the microelectrolysis process 1. utilizing aluminium charcoal to be formed, to the oxidation removal of hard-degraded substance in waste water, improves the biodegradability of waste water; 2. after the electrolysis of aluminium charcoal, the AI of formation
3+there is coagulation, have good coagulation effect to waste water, decrease the consumption of coagulating agent; 3. AI
3+oH in Bound moisture
-, the pH of waste water can be made to decline, thus reduce follow-up antacid dosage, decrease the consumption of neutralizing agent.
(3), coagulative precipitation tank I adopt PFS (Polyferric Sulfate), its reason is as follows: 1. behind aluminium charcoal Inner electrolysis pond, waste water have passed through the coagulation of aluminium salt, then adopts PFS, gives full play to the synergy of coagulating agent; 2. in practical application, neutralizing acid generally adopts sulfuric acid, sulphate content in waste water will be caused too much, be unfavorable for the anaerobic treatment of waste water, adopt PFS, Fe remaining in waste water
3+, will in conjunction with S in hydrolytic process
2-, thus eliminate the harm of vitriol.
(4), anaerobic biological treatment process of the present invention is diphasic anaerobic process, is hydrolyzed more stability and high efficiency than the two-stage of bibliographical information.
(5), the present invention in the end adopts ozone decolorization, ensure that decolorizing effect on the one hand, solves the problem that middle-stage wastewater colourity is difficult to stably reaching standard, on the other hand, reduce the dosage of ozone, is conducive to reducing running cost.
Embodiment
Below by embodiment, the present invention is set forth further, but do not limit the present invention.
embodiment 1
Get the middle-stage wastewater of Xinjiang pulp limited liability company, its water yield 24M
3/ d, its pH are 10, CODcr be 2000mg/L, SS is 1500mg/L, and colourity is 2000 times;
Utilize the treatment process of a kind of meta-alkalescence Cotton Pulp industry middle-stage wastewater of the present invention to process above-mentioned middle-stage wastewater, concrete steps are as follows:
Middle-stage wastewater is after the suspended substance that Microfilter filters preliminary removal middle-stage wastewater, enter aluminium charcoal Inner electrolysis pond, while improving the biodegradability of middle-stage wastewater, in and the pH of middle-stage wastewater, then enter equalizing tank and carry out homogenizing water quality, then enter coagulative precipitation tank 1 to carry out removing the colloid in middle-stage wastewater, fine suspension, enter hydrolytic tank again, the difficult degradation macromolecular substance in middle-stage wastewater is impelled to be converted into easy degradation of small molecular material, enter anaerobic pond again, under the effect of anaerobic pond obligatory anaerobic bacteria, remove the organism in water middle-stage wastewater, and then enter multi-stage aerobic pond, in multi-stage aerobic pond aerobic bacteria effect under, organism in further removal middle-stage wastewater, after second pond solid-liquid separation, water outlet purifies further through coagulative precipitation tank 2 again, and then enter ozone contact tank and carry out desolventing technology, namely the process of the middle-stage wastewater of Cotton Pulp industry is completed,
In above-mentioned treating processes, the controling parameters of each equipment is as follows:
Described Microfilter, it filters hole is 15 μm;
Described aluminium charcoal Inner electrolysis pond, built-in aluminium charcoal mixed fillers, wherein aluminium wood shavings: the mass ratio of granularity 5 order granulated active carbon is 3:1, and duration of contact is 4.0h;
Described equalizing tank, hydraulic detention time is 8h;
In described coagulative precipitation tank 1: coagulated agent is bodied ferric sulfate (PFS), the gauge that dosage throws 50mg bodied ferric sulfate by often liter of middle-stage wastewater is calculated, coagulation auxiliary agent is sulfuric acid, its dosage 9 to be advisable to regulate the pH of middle-stage wastewater, the coagulating time is 30min, and the coagulating sedimentation time is 4.0h;
In described hydrolytic tank, hydraulic detention time is 7.0h, and built-in plastic material, specification are the 3 D elastic filler of φ 120mm, the ight soil nutritive water that volume ratio is 1/30 of the middle-stage wastewater amount of process is added in hydrolytic tank, when adding startup, return sludge ratio, by 50%, must not reflux during normal operation; ;
In described anaerobic pond, hydraulic detention time is 7.0h, and built-in plastic material, specification are the 3 D elastic filler of φ 120mm;
In described multi-stage aerobic pond, hydraulic detention time is 14h, and built-in plastic material, specification are the 3 D elastic filler of φ 120mm, and aeration air water volume ratio is 30:1; When total residence time is constant, pond body is divided into 6-10 lattice, forms multistage continuous complete (CSTR), during startup, return sludge ratio, by 50%, must not reflux during normal operation;
In described second pond, surface load is 1.0m
3/ m
2.h;
In described coagulative precipitation tank 2, coagulated agent is polymerize aluminum chloride (PAC), and the gauge that dosage throws 10mg polymerize aluminum chloride by often liter of middle-stage wastewater is calculated, and the coagulating time is 30min, and the coagulating sedimentation time is 4.0h;
In described ozone contact tank, hydraulic detention time is 1.0h, and the gauge that ozone dosage throws 5mg by often liter of middle-stage wastewater is calculated.
The middle-stage wastewater of the Cotton Pulp industry after above-mentioned process, in its effluent index, pH is 7.8, CODcr is 91mg/L, SS is 70mg/L, colourity is 45 times, shows thus, and the every water-quality guideline in the water outlet after its process reaches primary standard in " integrated wastewater discharge standard " (GB8978-1996) table 4.
In sum, the treatment process of a kind of meta-alkalescence Cotton Pulp industry middle-stage wastewater of the present invention effectively can process meta-alkalescence Cotton Pulp industry middle-stage wastewater, makes it reach the emission standard of national regulation.
The above is only the citing of embodiments of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement, these improvement also should be considered as protection scope of the present invention.
Claims (2)
1. a treatment process for the middle-stage wastewater of meta-alkalescence Cotton Pulp industry, is characterized in that specifically comprising the steps:
Middle-stage wastewater filters after the preliminary suspended substance removed in middle-stage wastewater through Microfilter, enter aluminium charcoal Inner electrolysis pond, while improving middle-stage wastewater biodegradability, in and middle-stage wastewater pH, then enter equalizing tank and carry out homogenizing water quality, then enter coagulative precipitation tank 1 to carry out removing the colloid in middle-stage wastewater, fine suspension, enter hydrolytic tank again, the difficult degradation macromolecular substance in middle-stage wastewater is impelled to be converted into easy degradation of small molecular material, enter anaerobic pond again, in anaerobic pond obligatory anaerobic bacteria effect under, remove Organic substance in water, and then enter multi-stage aerobic pond, the effect of the aerobic bacteria in multi-stage aerobic pond, organism in further removal middle-stage wastewater, and then after second pond solid-liquid separation, water outlet purifies further through coagulative precipitation tank 2 again, and then enter ozone contact tank and carry out desolventing technology, namely the process of the middle-stage wastewater of Cotton Pulp industry is completed.
2. the treatment process of the middle-stage wastewater of a kind of meta-alkalescence Cotton Pulp as claimed in claim 1 industry, is characterized in that the controling parameters of each equipment in treating processes is as follows:
Described Microfilter, it filters hole is 15 μm;
Described aluminium charcoal Inner electrolysis pond, built-in aluminium charcoal mixed fillers, wherein aluminium wood shavings: the mass ratio of granularity 5 order granulated active carbon is 3:1, and duration of contact is 4.0h;
Described equalizing tank, hydraulic detention time is 8h;
In described coagulative precipitation tank 1: coagulated agent is bodied ferric sulfate, the gauge that dosage throws 10mg bodied ferric sulfate by often liter of middle-stage wastewater is calculated, and coagulation auxiliary agent is sulfuric acid, and its dosage 9 to be advisable to regulate the pH of middle-stage wastewater, the coagulating time is 30min, and the coagulating sedimentation time is 4.0h;
In described hydrolytic tank, hydraulic detention time is 7.0h, and built-in plastic material, specification are the 3 D elastic filler of φ 120mm, the ight soil nutritive water that volume ratio is 1/30 of the middle-stage wastewater amount of process is added in hydrolytic tank, when adding startup, return sludge ratio, by 50%, must not reflux during normal operation;
In described anaerobic pond, hydraulic detention time is 7.0h, and built-in plastic material, specification are φ 120mm 3 D elastic filler;
In described multi-stage aerobic pond, hydraulic detention time is 14h, and built-in plastic material, specification are φ 120mm 3 D elastic filler, and aeration air water volume ratio is 30:1; When total residence time is constant, pond body is divided into 6-10 lattice, forms multistage continuous complete, during startup, return sludge ratio, by 50%, must not reflux during normal operation;
In described second pond, surface load is 1.0m
3/ m
2.h;
In described coagulative precipitation tank 2, coagulated agent is polymerize aluminum chloride, and the gauge that dosage throws 10mg polymerize aluminum chloride by often liter of middle-stage wastewater is calculated, and the coagulating time is 30min, and the coagulating sedimentation time is 4.0h;
In described ozone contact tank, hydraulic detention time is 1.0h, and the gauge that ozone dosage throws 5mg by often liter of middle-stage wastewater is calculated.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084666A (en) * | 2015-08-18 | 2015-11-25 | 浙江一清环保工程有限公司 | Chemical industry wastewater comprehensive treatment method |
| CN107089770A (en) * | 2017-05-23 | 2017-08-25 | 宜兴艾科森生态环卫设备有限公司 | A kind of multistage biological contact oxidation pond |
| CN107216001A (en) * | 2017-06-12 | 2017-09-29 | 河北卓润环境科技有限公司 | Method based on multidimensional Strong oxdiative and circulation biochemical treatment pulp black liquor middle-stage wastewater |
| CN108929003A (en) * | 2018-09-12 | 2018-12-04 | 浙江建设职业技术学院 | A kind of municipal wastewater processing system and method |
| CN109704517A (en) * | 2019-01-28 | 2019-05-03 | 北京华夏壹泰科技有限公司 | A kind of processing system and method for the high organic matter mine water of high suspended matter |
| CN110981039A (en) * | 2019-11-14 | 2020-04-10 | 广西博世科环保科技股份有限公司 | Method for treating organic wastewater by using aluminum carbon-ozone micro-nano bubbles |
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| KR20010038791A (en) * | 1999-10-27 | 2001-05-15 | 양인모 | Paper wastewater treatment process and paper manufacturing method using the treated water therefrom |
| CN201751389U (en) * | 2010-06-10 | 2011-02-23 | 张希华 | Cotton pulp sewage treatment equipment |
| CN102225827A (en) * | 2011-05-24 | 2011-10-26 | 青岛理工大学 | Treatment method of straw pulp papermaking middle-stage wastewater |
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2015
- 2015-03-30 CN CN201510143273.6A patent/CN104743749B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010038791A (en) * | 1999-10-27 | 2001-05-15 | 양인모 | Paper wastewater treatment process and paper manufacturing method using the treated water therefrom |
| CN201751389U (en) * | 2010-06-10 | 2011-02-23 | 张希华 | Cotton pulp sewage treatment equipment |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084666A (en) * | 2015-08-18 | 2015-11-25 | 浙江一清环保工程有限公司 | Chemical industry wastewater comprehensive treatment method |
| CN105084666B (en) * | 2015-08-18 | 2017-05-10 | 浙江一清环保工程有限公司 | Chemical industry wastewater comprehensive treatment method |
| CN107089770A (en) * | 2017-05-23 | 2017-08-25 | 宜兴艾科森生态环卫设备有限公司 | A kind of multistage biological contact oxidation pond |
| CN107216001A (en) * | 2017-06-12 | 2017-09-29 | 河北卓润环境科技有限公司 | Method based on multidimensional Strong oxdiative and circulation biochemical treatment pulp black liquor middle-stage wastewater |
| CN108929003A (en) * | 2018-09-12 | 2018-12-04 | 浙江建设职业技术学院 | A kind of municipal wastewater processing system and method |
| CN108929003B (en) * | 2018-09-12 | 2021-12-03 | 浙江建设职业技术学院 | Urban wastewater treatment system and method |
| CN109704517A (en) * | 2019-01-28 | 2019-05-03 | 北京华夏壹泰科技有限公司 | A kind of processing system and method for the high organic matter mine water of high suspended matter |
| CN110981039A (en) * | 2019-11-14 | 2020-04-10 | 广西博世科环保科技股份有限公司 | Method for treating organic wastewater by using aluminum carbon-ozone micro-nano bubbles |
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