CN114349271A - Zero-discharge treatment method for colored tissue paper wastewater - Google Patents
Zero-discharge treatment method for colored tissue paper wastewater Download PDFInfo
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- CN114349271A CN114349271A CN202111612963.3A CN202111612963A CN114349271A CN 114349271 A CN114349271 A CN 114349271A CN 202111612963 A CN202111612963 A CN 202111612963A CN 114349271 A CN114349271 A CN 114349271A
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- 238000000034 method Methods 0.000 title claims abstract description 55
- 239000002351 wastewater Substances 0.000 title claims abstract description 21
- 208000028659 discharge Diseases 0.000 title description 11
- 239000010865 sewage Substances 0.000 claims abstract description 108
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 238000004537 pulping Methods 0.000 claims abstract description 46
- 239000000835 fiber Substances 0.000 claims abstract description 31
- 238000004064 recycling Methods 0.000 claims abstract description 28
- 238000001556 precipitation Methods 0.000 claims abstract description 24
- 238000003860 storage Methods 0.000 claims abstract description 24
- 239000002699 waste material Substances 0.000 claims abstract description 23
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 230000003647 oxidation Effects 0.000 claims abstract description 9
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 9
- 230000020477 pH reduction Effects 0.000 claims abstract description 7
- 238000005273 aeration Methods 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000005345 coagulation Methods 0.000 claims abstract description 6
- 230000015271 coagulation Effects 0.000 claims abstract description 6
- 238000004062 sedimentation Methods 0.000 claims description 62
- 239000010802 sludge Substances 0.000 claims description 58
- 239000006228 supernatant Substances 0.000 claims description 35
- 238000010009 beating Methods 0.000 claims description 17
- 238000005086 pumping Methods 0.000 claims description 17
- 238000004065 wastewater treatment Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 4
- 239000010893 paper waste Substances 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- 241001148470 aerobic bacillus Species 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 3
- 239000000701 coagulant Substances 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 3
- 238000012258 culturing Methods 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 230000003472 neutralizing effect Effects 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000002893 slag Substances 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 241000588724 Escherichia coli Species 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000011538 cleaning material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
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Abstract
The invention relates to a zero-emission treatment method of colored tissue paper wastewater, and a paper machine recycling system provides a comprehensive recycling mode of precipitation separation, clear water recycling and precipitated fiber pulping, so that colored waste pulp water is reasonably recycled, the discharge amount of the colored waste pulp water is greatly reduced, the papermaking cost is greatly reduced, and the resource waste is reduced. The sewage treatment station uses the treatment flows of 'storage aeration, acidification adjustment, mixed oxidation, coagulation reaction, precipitation separation, secondary precipitation and ozone oxidation', so that the slag and clear water in the sewage are separated and recycled, and domestic sewage and production wastewater can be well treated; the separated and recycled clean water is divided into clean water which is not decolored in the first clean water tank and clean water which is sterilized and decolored in the second clean water tank, the clean water which is not decolored can be used for cleaning and sanitation and deep color paper making, and the clean water which is sterilized and decolored is used for replacing the color of the new tissue paper. The process flow needs to treat and recycle sewage in a grading way according to different uses, thereby achieving the effects of economy and energy conservation.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a treatment method for zero discharge of wastewater of colored tissue paper.
Background
The use of the tissue paper in production and life is more and more extensive, but the treatment difficulty of the paper-making wastewater of the tissue paper is high, the treatment difficulty of the paper-making wastewater of the colored tissue paper is higher, and a plurality of paper mills can not treat the produced colored wastewater and only discharge the colored wastewater due to the reasons of technology, cost and the like, and the cost of discharging the colored wastewater is higher, so that resources are wasted.
Disclosure of Invention
Technical problem to be solved
In order to solve the problems in the prior art, the invention provides a method for treating the colored tissue paper with zero discharge of wastewater, which can reasonably treat the papermaking wastewater of the colored tissue paper, reduce the cost and save the resources.
(II) technical scheme
In the scheme, the paper machine recycling system executes the wastewater treatment process B;
in the scheme, a sewage treatment station is used for executing a sewage treatment process A;
in order to achieve the purpose, the invention adopts the technical scheme that: a zero-emission treatment method for colored tissue paper wastewater comprises a paper machine wastewater treatment process B, wherein the paper machine wastewater treatment process B comprises the following steps:
precipitation scheme b 1:
the single paper machine is provided with four primary sedimentation tanks and a secondary sedimentation tank, the four primary sedimentation tanks can be respectively in the working states of collection operation, sedimentation operation and recycling operation without delay, and the secondary sedimentation tank is used for storing precipitated fibers and pulping water;
the operation flow of the first-stage sedimentation tank for executing the collection-sedimentation-recycling operation is as follows:
collecting operation: the primary sedimentation tank receives the color waste pulp water which is conveyed by the paper machine and is generated in the production process;
and (3) precipitation operation: after the collection operation is finished, precipitating and separating the colored waste slurry to form supernatant and precipitated fibers;
recycling operation: pumping the supernatant liquid back to a paper machine or a pulping pot for use, and conveying the precipitated fibers to a secondary sedimentation tank for storage;
pulping process b 2:
when the pulping pot is used for pulping, if the color of the pulping at this time is the same as the color of the pulping at the last time, the precipitated fiber stored in the secondary sedimentation tank is used, and the supernatant stored in the primary sedimentation tank or the pulping water stored in the secondary sedimentation tank is used as the pulping water.
(III) advantageous effects
The invention has the beneficial effects that: the color waste pulp water is collected, precipitated and recycled through the four primary sedimentation tanks, the color waste pulp water can be separated into supernate (namely clear water) and precipitated fibers, the supernate is used for paper machine recycling and next same-color pulping, the precipitated fibers can be used for next same-color pulping, and the supernate formed by separation and the precipitated fibers can also play a stabilizing role in the color of the produced paper when the precipitated fibers are used for next same-color pulping. Therefore, the invention provides a comprehensive recycling mode of 'precipitation separation, clear water recycling and precipitated fiber pulping', so that the color waste pulp water is reasonably recycled, the discharge amount of the color waste pulp water is greatly reduced, the papermaking cost is greatly reduced, and the resource waste is reduced.
Drawings
FIG. 1 is a flow diagram of a process for zero waste water discharge of colored tissue paper in accordance with the present invention;
FIG. 2 is a system diagram of a sewage treatment station and a paper machine recycling system incorporating the method of the present invention for zero discharge of colored tissue paper waste water;
FIG. 3 is a detail view of portion A of FIG. 2;
fig. 4 is a detailed view of a portion a of fig. 3.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 1, a method for zero-emission treatment of waste water from colored tissue paper comprises a paper machine waste water treatment process B, wherein the paper machine waste water treatment process B comprises:
precipitation scheme b 1:
the single paper machine is provided with four primary sedimentation tanks and a secondary sedimentation tank, the four primary sedimentation tanks can be respectively in the working states of collection operation, sedimentation operation and recycling operation without delay, and the secondary sedimentation tank is used for storing precipitated fibers and pulping water;
the operation flow of the first-stage sedimentation tank for executing the collection-sedimentation-recycling operation is as follows:
collecting operation: the primary sedimentation tank receives the color waste pulp water which is conveyed by the paper machine and is generated in the production process;
and (3) precipitation operation: after the collection operation is finished, precipitating and separating the colored waste slurry to form supernatant and precipitated fibers;
recycling operation: pumping the supernatant liquid back to a paper machine or a pulping pot for use, and conveying the precipitated fibers to a secondary sedimentation tank for storage;
pulping process b 2:
when the pulping pot is used for pulping, if the color of the pulping at this time is the same as the color of the pulping at the last time, the precipitated fiber stored in the secondary sedimentation tank is used, and the supernatant stored in the primary sedimentation tank or the pulping water stored in the secondary sedimentation tank is used as the pulping water.
From the above description, the beneficial effects of the present invention are: the color waste pulp water is collected, precipitated and recycled through the four primary sedimentation tanks, the color waste pulp water can be separated into supernate (namely clear water) and precipitated fibers, the supernate is used for paper machine recycling and next same-color pulping, the precipitated fibers can be used for next same-color pulping, and the supernate formed by separation and the precipitated fibers can also play a stabilizing role in the color of the produced paper when the precipitated fibers are used for next same-color pulping. Therefore, the invention provides a comprehensive recycling mode of 'precipitation separation, clear water recycling and precipitated fiber pulping', so that the color waste pulp water is reasonably recycled, the discharge amount of the color waste pulp water is greatly reduced, the papermaking cost is greatly reduced, and the resource waste is reduced.
Further, the pulping process b2 further includes:
if the color of this making beating is different from the color of making beating last time, then use clear water and carry out the making beating operation with the precipitation fibre of the color adaptation of this making beating.
From the above description, when the paper making color of the paper machine changes, the beating color also needs to be changed, so that the beating operation needs to be carried out by using clean water and replacing the precipitated fibers matched with the beating color at this time, and the error of the paper making color is avoided.
Further, still include sewage treatment process A, sewage treatment process A includes:
scheme a 1: pumping sewage into a sewage storage pool for stirring and aeration, homogenizing water quality, acidifying and adjusting water quantity of the sewage, and then pumping the sewage into a sewage mixing pool;
scheme a 2: the sewage mixing tank adopts an activated sludge process to carry out mixed oxidation on the sewage and converts the sewage into CO by utilizing the capability of the aerobic bacteria to efficiently degrade organic matters2And H20，；
Scheme a 3: the sewage mixing tank conveys the treated sewage to a coagulation reaction tank and quickly mixes the treated sewage with a coagulant added into the dosing tank to destabilize suspended sludge in the sewage;
scheme a 4: conveying the sewage in the mixing tank to a primary sedimentation tank to enable suspended sludge in the sewage to be coagulated into large particles;
scheme a 5: conveying the sewage in the sedimentation tank to a secondary sedimentation tank, standing and sinking the suspended sludge in the sewage by adopting an advection sedimentation process to stratify the sewage into bottom sludge and supernatant, pumping the bottom sludge into a sludge concentration tank, and overflowing the supernatant into a first clean water tank;
scheme a 6: pumping the supernatant into an ozone decoloring tank for decoloring by a first clean water tank;
scheme a 7: the ozone decoloration tank is provided with an ozone generator, the supernatant pumped into the first clean water tank is dehydrated by utilizing the strong oxidizing property of ozone, and the treated supernatant is stored into the second clean water tank.
From the above description, the treatment process of 'storage aeration + acidification regulation + mixed oxidation + coagulation reaction + precipitation separation + secondary precipitation + ozone oxidation' is adopted to separate and recycle the slag and the clear water in the sewage, so that the domestic sewage and the production wastewater can be well treated; the separated and recycled clean water is divided into clean water which is not decolored in the first clean water tank and clean water which is sterilized and decolored in the second clean water tank, the clean water which is not decolored can be used for cleaning and sanitation and deep color paper making, and the clean water which is sterilized and decolored is used for replacing the color of the new tissue paper. The process flow needs to treat and recycle sewage in a grading way according to different uses, thereby achieving the effects of economy and energy conservation.
Further, the step a2 is followed by:
and refluxing part of activated sludge in the treated sewage into the sewage storage pool, culturing facultative anaerobes in the sewage storage pool under an anaerobic condition, carrying out acidification and degradation on refractory macromolecular organic matters in the activated sludge to obtain organic acid, catalyzing pigments of the activated sludge, neutralizing chemical components of the activated sludge, and carrying out precipitation operation.
From the above description, it can be known that part of activated sludge of the sewage treated by the sewage mixing tank flows back to the sewage storage tank, so that the activated sludge can be utilized and treated, and the utilization rate is improved.
Further, the step a5, after the bottom layer sludge is pumped into the sludge concentration tank, further includes:
the sludge concentration tank stores, concentrates and digests the pumped sludge to obtain supernatant and bottom sludge, the bottom sludge is pumped into a sludge filter press to be dehydrated, and the supernatant is refluxed into a sewage storage tank to be treated.
According to the above description, the bottom layer sludge can be pumped into the sludge concentration tank and then can be treated to obtain the supernatant, and the supernatant is refluxed to the sewage storage tank for recycling, so that the water resource and the cost are effectively saved, and the recycling rate is improved.
Example one
Referring to fig. 1, a method for zero-emission treatment of waste water from colored tissue paper comprises a paper machine waste water treatment process B, wherein the paper machine waste water treatment process B comprises:
precipitation scheme b 1:
the single paper machine is provided with four primary sedimentation tanks and a secondary sedimentation tank, the four primary sedimentation tanks can be respectively in the working states of collection operation, sedimentation operation and recycling operation without delay, and the secondary sedimentation tank is used for storing precipitated fibers and pulping water;
the operation flow of the first-stage sedimentation tank for executing the collection-sedimentation-recycling operation is as follows:
collecting operation: the primary sedimentation tank receives the color waste pulp water which is conveyed by the paper machine and is generated in the production process;
and (3) precipitation operation: after the collection operation is finished, precipitating and separating the colored waste slurry to form supernatant and precipitated fibers;
recycling operation: pumping the supernatant liquid back to a paper machine or a pulping pot for use, and conveying the precipitated fibers to a secondary sedimentation tank for storage;
pulping process b 2:
when the pulping pot is used for pulping, if the color of the pulping at this time is the same as the color of the pulping at the last time, the precipitated fiber stored in the secondary sedimentation tank is used, and the supernatant stored in the primary sedimentation tank or the pulping water stored in the secondary sedimentation tank is used as the pulping water.
Wherein, beating process b2 still includes:
if the color of this making beating is different from the color of making beating last time, then use clear water and carry out the making beating operation with the precipitation fibre of the color adaptation of this making beating. And uniformly cleaning materials in the first-stage sedimentation tank and the second-stage sedimentation tank, and preparing to collect and treat the color waste pulp water produced in the paper machine production.
Wherein, still include sewage treatment process A, sewage treatment process A includes:
scheme a 1: pumping sewage into a sewage storage pool for stirring and aeration, homogenizing water quality, acidifying and adjusting water quantity of the sewage, and then pumping the sewage into a sewage mixing pool;
scheme a 2: the sewage mixing tank adopts an activated sludge process to carry out mixed oxidation on the sewage and converts the sewage into CO by utilizing the capability of the aerobic bacteria to efficiently degrade organic matters2And H20，；
Scheme a 3: the sewage mixing tank conveys the treated sewage to a coagulation reaction tank and quickly mixes the treated sewage with a coagulant added into the dosing tank to destabilize suspended sludge in the sewage;
scheme a 4: conveying the sewage in the mixing tank to a primary sedimentation tank to enable suspended sludge in the sewage to be coagulated into large particles;
scheme a 5: conveying the sewage in the sedimentation tank to a secondary sedimentation tank, standing and sinking the suspended sludge in the sewage by adopting an advection sedimentation process to stratify the sewage into bottom sludge and supernatant, pumping the bottom sludge into a sludge concentration tank, and overflowing the supernatant into a first clean water tank;
scheme a 6: pumping the supernatant into an ozone decoloring tank for decoloring by a first clean water tank;
scheme a 7: the ozone decoloration tank is provided with an ozone generator, the supernatant pumped into the first clean water tank is dehydrated by utilizing the strong oxidizing property of ozone, and the treated supernatant is stored into the second clean water tank.
Specifically, the sewage stored in the sewage storage pool comprises domestic sewage, production sewage, emergency pool sewage, chemical industry warehouse sewage, paper machine sewage, pulp pool sewage, sedimentation pool sewage, boiler sewage and machine maintenance forklift sewage, and the sewage is input into the sewage storage pool through a sewage pump.
Wherein, the step a2 is followed by:
and refluxing part of activated sludge in the treated sewage into the sewage storage pool, culturing facultative anaerobes in the sewage storage pool under an anaerobic condition, carrying out acidification and degradation on refractory macromolecular organic matters in the activated sludge to obtain organic acid, catalyzing pigments of the activated sludge, neutralizing chemical components of the activated sludge, and carrying out precipitation operation.
Wherein, the step a5, after the bottom layer sludge is pumped into the sludge concentration tank, further comprises:
the sludge concentration tank stores, concentrates and digests the pumped sludge to obtain supernatant and bottom sludge, the bottom sludge is pumped into a sludge filter press to be dehydrated, and the supernatant is refluxed into a sewage storage tank to be treated.
It is worth mentioning that the daily water consumption of a single paper machine is about 600 tons generally, and if the daily water consumption is treated by a sewage treatment station, the treatment capacity is very large, and the papermaking cost is also greatly increased. Therefore, an independent paper machine recycling system is adopted to execute the paper machine wastewater treatment process B, the daily and outdoor discharge capacity (under the condition that the color of the paper machine is not changed) of a single paper machine is about 50 tons after the paper machine wastewater treatment process B is passed, the pressure of a sewage treatment station is greatly reduced, the paper making cost is also greatly reduced, and the resource waste is reduced. And the sewage treatment station: the sewage treatment process A of 'storage aeration + acidification adjustment + mixed oxidation + coagulation reaction + precipitation separation + secondary precipitation + ozone oxidation' is adopted, so that the sewage can be well decolorized, the sewage treatment capacity is about 360 tons per day, and the treatment capacity meets the production requirement.
In summary, the present invention provides a zero discharge treatment method for waste water of colored tissue paper, wherein the paper machine waste water treatment process B can precipitate all colored waste water from the first and second precipitation tanks first, and the first treatment is performed first, so as to greatly reduce the treatment capacity of the sewage treatment station (i.e. the workstation executing the sewage treatment process a), and reduce the cost. And the sewage storage pool in the sewage treatment station collects all sewage, mixes and neutralizes, and precipitates after acidification adjustment to be used for making dark paper or cleaning, and the treatment capacity of the ozone decolorizing tank is greatly reduced after the two steps, so that the cost is greatly reduced. In addition, the paper made from the water used for production after ozone sterilization and decoloration can meet the requirements of food grade, and can reach the national standard through detection of escherichia coli. Each treatment process uses a targeted scheme for treatment, so the use cost is low and the effect is good. In addition, the paper machine recycling system (namely the system for executing the paper machine wastewater treatment process B) is a single recycling system, so that the maintenance and the overhaul are convenient. In addition, the water treatment sedimentation tank, the ozone decoloration tank and the like are connected in parallel for use, and the maintenance and the overhaul are convenient.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (5)
1. The zero-emission treatment method of the colored tissue paper wastewater is characterized by comprising a paper machine wastewater treatment process B, wherein the paper machine wastewater treatment process B comprises the following steps:
precipitation scheme b 1:
the single paper machine is provided with four primary sedimentation tanks and a secondary sedimentation tank, the four primary sedimentation tanks can be respectively in the working states of collection operation, sedimentation operation and recycling operation without delay, and the secondary sedimentation tank is used for storing precipitated fibers and pulping water;
the operation flow of the first-stage sedimentation tank for executing the collection-sedimentation-recycling operation is as follows:
collecting operation: the primary sedimentation tank receives the color waste pulp water which is conveyed by the paper machine and is generated in the production process;
and (3) precipitation operation: after the collection operation is finished, precipitating and separating the colored waste slurry to form supernatant and precipitated fibers;
recycling operation: pumping the supernatant liquid back to a paper machine or a pulping pot for use, and conveying the precipitated fibers to a secondary sedimentation tank for storage;
pulping process b 2:
when the pulping pot is used for pulping, if the color of the pulping at this time is the same as the color of the pulping at the last time, the precipitated fiber stored in the secondary sedimentation tank is used, and the supernatant stored in the primary sedimentation tank or the pulping water stored in the secondary sedimentation tank is used as the pulping water.
2. The process for zero emission of colored tissue paper waste water according to claim 1, wherein said beating process b2 further comprises:
if the color of this making beating is different from the color of making beating last time, then use clear water and carry out the making beating operation with the precipitation fibre of the color adaptation of this making beating.
3. The process for zero-emission of colored tissue paper waste water according to claim 1, further comprising a sewage treatment process a, wherein the sewage treatment process a comprises:
scheme a 1: pumping sewage into a sewage storage pool for stirring and aeration, homogenizing water quality, acidifying and adjusting water quantity of the sewage, and then pumping the sewage into a sewage mixing pool;
scheme a 2: the sewage mixing tank adopts an activated sludge process to carry out mixed oxidation on the sewage and converts the sewage into CO by utilizing the capability of the aerobic bacteria to efficiently degrade organic matters2And H20，；
Scheme a 3: the sewage mixing tank conveys the treated sewage to a coagulation reaction tank and quickly mixes the treated sewage with a coagulant added into the dosing tank to destabilize suspended sludge in the sewage;
scheme a 4: conveying the sewage in the mixing tank to a primary sedimentation tank to enable suspended sludge in the sewage to be coagulated into large particles;
scheme a 5: conveying the sewage in the sedimentation tank to a secondary sedimentation tank, standing and sinking the suspended sludge in the sewage by adopting an advection sedimentation process to stratify the sewage into bottom sludge and supernatant, pumping the bottom sludge into a sludge concentration tank, and overflowing the supernatant into a first clean water tank;
scheme a 6: pumping the supernatant into an ozone decoloring tank for decoloring by a first clean water tank;
scheme a 7: the ozone decoloration tank is provided with an ozone generator, the supernatant pumped into the first clean water tank is dehydrated by utilizing the strong oxidizing property of ozone, and the treated supernatant is stored into the second clean water tank.
4. The process for zero waste water discharge of colored tissue paper according to claim 3 further comprising, after step a 2:
and refluxing part of activated sludge in the treated sewage into the sewage storage pool, culturing facultative anaerobes in the sewage storage pool under an anaerobic condition, carrying out acidification and degradation on refractory macromolecular organic matters in the activated sludge to obtain organic acid, catalyzing pigments of the activated sludge, neutralizing chemical components of the activated sludge, and carrying out precipitation operation.
5. The process for zero discharge of colored tissue paper waste water of claim 3 wherein said step a5 further comprises, after pumping the bottom layer sludge into a sludge thickener:
the sludge concentration tank stores, concentrates and digests the pumped sludge to obtain supernatant and bottom sludge, the bottom sludge is pumped into a sludge filter press to be dehydrated, and the supernatant is refluxed into a sewage storage tank to be treated.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010142147A1 (en) * | 2009-06-13 | 2010-12-16 | 汇鑫生物浆纸股份有限公司 | Wastewater zero discharge process for paper-making using biological pulping |
| CN102145965A (en) * | 2011-04-18 | 2011-08-10 | 李斌 | Textile dyeing wastewater advanced treatment recycling technology |
| CN104478174A (en) * | 2014-12-19 | 2015-04-01 | 新疆环境工程技术有限责任公司 | High-salt-content dyeing wastewater treatment recovery zero discharge integration method |
| CN105399284A (en) * | 2015-12-23 | 2016-03-16 | 沈晓笑 | Papermaking wastewater and sludge ecological recycling system and ecological recycling method |
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2021
- 2021-12-27 CN CN202111612963.3A patent/CN114349271B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010142147A1 (en) * | 2009-06-13 | 2010-12-16 | 汇鑫生物浆纸股份有限公司 | Wastewater zero discharge process for paper-making using biological pulping |
| CN102145965A (en) * | 2011-04-18 | 2011-08-10 | 李斌 | Textile dyeing wastewater advanced treatment recycling technology |
| CN104478174A (en) * | 2014-12-19 | 2015-04-01 | 新疆环境工程技术有限责任公司 | High-salt-content dyeing wastewater treatment recovery zero discharge integration method |
| CN105399284A (en) * | 2015-12-23 | 2016-03-16 | 沈晓笑 | Papermaking wastewater and sludge ecological recycling system and ecological recycling method |
Non-Patent Citations (1)
| Title |
|---|
| 杨柳;贾秀菊;张文芝;: "某造纸废水处理工程实例", 河北建筑工程学院学报, no. 01, pages 57 - 61 * |
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