CN114349271B - Zero-discharge treatment method for wastewater of color tissue paper - Google Patents
Zero-discharge treatment method for wastewater of color tissue paper Download PDFInfo
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- CN114349271B CN114349271B CN202111612963.3A CN202111612963A CN114349271B CN 114349271 B CN114349271 B CN 114349271B CN 202111612963 A CN202111612963 A CN 202111612963A CN 114349271 B CN114349271 B CN 114349271B
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 239000002351 wastewater Substances 0.000 title claims abstract description 23
- 208000028659 discharge Diseases 0.000 title description 12
- 239000010865 sewage Substances 0.000 claims abstract description 109
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 71
- 238000004064 recycling Methods 0.000 claims abstract description 30
- 239000000835 fiber Substances 0.000 claims abstract description 29
- 238000001556 precipitation Methods 0.000 claims abstract description 26
- 238000004537 pulping 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
- 239000002002 slurry Substances 0.000 claims abstract description 15
- 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
- 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 59
- 239000010802 sludge Substances 0.000 claims description 55
- 239000006228 supernatant Substances 0.000 claims description 40
- 238000010009 beating Methods 0.000 claims description 39
- 238000005086 pumping Methods 0.000 claims description 18
- 238000004065 wastewater treatment Methods 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 14
- 230000000593 degrading effect Effects 0.000 claims description 6
- 230000003472 neutralizing effect Effects 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 241000894006 Bacteria Species 0.000 claims description 3
- 208000005156 Dehydration Diseases 0.000 claims description 3
- 241001148470 aerobic bacillus Species 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
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 claims description 3
- 235000005985 organic acids Nutrition 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
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 1
- 239000010893 paper waste Substances 0.000 claims 1
- 239000002562 thickening agent Substances 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000020477 pH reduction Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000002893 slag Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 241000588724 Escherichia coli Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 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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- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a method for treating wastewater of colored tissue paper in a zero discharge way, 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 slurry water is reasonably recycled, the discharge amount of the colored waste slurry water is greatly reduced, the papermaking cost is greatly reduced, and the resource waste is reduced. The sewage treatment station uses a treatment flow of 'storage aeration + acidification adjustment + mixed oxidation + coagulation reaction + precipitation separation + secondary precipitation + ozone oxidation', so that slag and clear water in sewage can be separated and recycled, and domestic sewage and production wastewater can be well treated; the separated and recycled clean water is divided into two types of clean water which is not decolorized in the first clean water tank and clean water which is sterilized and decolorized in the second clean water tank, wherein the clean water which is not decolorized can be used for cleaning and sanitation and making dark paper, and the clean water which is sterilized and decolorized can be used for replacing the color of new tissue paper. The process flow is used for grading treatment and recycling of sewage according to different use, so that the effects of economy and energy conservation are achieved.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a zero-emission treatment method for wastewater of colored tissue paper.
Background
Tissue paper has wider and wider application in production and life, but the tissue paper has high treatment difficulty of papermaking wastewater, and the papermaking wastewater of colored tissue paper has higher treatment difficulty, so that many paper mills cannot treat the produced colored wastewater due to the reasons of technology, cost and the like, and only can discharge the colored wastewater, so that the cost of the colored wastewater discharge is higher, and resources are wasted.
Disclosure of Invention
First, the technical problem to be solved
In order to solve the problems in the prior art, the invention provides a zero-discharge treatment method for the wastewater of the colored tissue paper, which can reasonably treat the wastewater of the colored tissue paper, reduce the cost and save the resources.
(II) technical scheme
The wastewater treatment flow B is implemented in the scheme and is a paper machine recycling system;
in the scheme, the sewage treatment station which executes the sewage treatment flow A is a sewage treatment station;
in order to achieve the above purpose, the invention adopts the following technical scheme: the zero-emission treatment method of the colored tissue paper wastewater comprises a paper machine wastewater treatment process B, wherein the paper machine wastewater treatment process B comprises the following steps of:
precipitation scheme b1:
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 collecting operation, sedimentation operation and recycling operation without delay, and the secondary sedimentation tanks are used for storing precipitated fibers and pulping water;
the operation flow of the first-stage sedimentation tank for executing the collecting-sedimentation-recycling operation is as follows:
collecting: the first-stage sedimentation tank receives the color waste slurry produced in the production process and conveyed by the paper machine;
precipitation operation: after the collection operation is completed, precipitating and separating the colored waste slurry water to form supernatant and precipitated fibers;
and (3) recycling operation: pumping the supernatant back to a paper machine or a pulping pot for use, and conveying the precipitated fibers to a secondary precipitation tank for storage;
pulping process b2:
when the beating pot carries out beating operation, if the color of beating this time is the same with the color of beating last time, then use the sediment fibre that second grade sedimentation tank stored, the beating water uses the supernatant fluid that the first grade sedimentation tank stored or the beating water that the second grade sedimentation tank stored.
(III) beneficial effects
The beneficial effects of the invention are as follows: 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 supernatant (namely clear water) and precipitated fibers, the supernatant is used for recycling of a paper machine and next homochromatic pulping, the precipitated fibers can be used for next homochromatic pulping, and the separated supernatant and precipitated fibers are used for next homochromatic pulping and can also play a role in stabilizing the color of produced paper. Therefore, the invention provides a comprehensive recycling mode of 'precipitation separation + clear water recycling + precipitation fiber pulping', so that the colored waste slurry water is reasonably recycled, the discharge amount of the colored waste slurry water is greatly reduced, the papermaking cost is greatly reduced, and the resource waste is reduced.
Drawings
FIG. 1 is a flow chart of the process for zero emission of colored tissue waste water of the present invention;
FIG. 2 is a block diagram of a system of the invention for combining a sewage treatment station and a machine recycling system for performing a process for zero discharge of colored tissue wastewater;
FIG. 3 is a detail view of portion A of FIG. 2;
fig. 4 is a detailed view of the portion a in fig. 3.
Detailed Description
The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.
Referring to fig. 1, a method for treating color tissue paper wastewater with zero discharge includes a paper machine wastewater treatment process B, wherein the paper machine wastewater treatment process B includes:
precipitation scheme b1:
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 collecting operation, sedimentation operation and recycling operation without delay, and the secondary sedimentation tanks are used for storing precipitated fibers and pulping water;
the operation flow of the first-stage sedimentation tank for executing the collecting-sedimentation-recycling operation is as follows:
collecting: the first-stage sedimentation tank receives the color waste slurry produced in the production process and conveyed by the paper machine;
precipitation operation: after the collection operation is completed, precipitating and separating the colored waste slurry water to form supernatant and precipitated fibers;
and (3) recycling operation: pumping the supernatant back to a paper machine or a pulping pot for use, and conveying the precipitated fibers to a secondary precipitation tank for storage;
pulping process b2:
when the beating pot carries out beating operation, if the color of beating this time is the same with the color of beating last time, then use the sediment fibre that second grade sedimentation tank stored, the beating water uses the supernatant fluid that the first grade sedimentation tank stored or the beating water that the second grade sedimentation tank stored.
From the above description, the beneficial effects of the invention are as follows: 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 supernatant (namely clear water) and precipitated fibers, the supernatant is used for recycling of a paper machine and next homochromatic pulping, the precipitated fibers can be used for next homochromatic pulping, and the separated supernatant and precipitated fibers are used for next homochromatic pulping and can also play a role in stabilizing the color of produced paper. Therefore, the invention provides a comprehensive recycling mode of 'precipitation separation + clear water recycling + precipitation fiber pulping', so that the colored waste slurry water is reasonably recycled, the discharge amount of the colored waste slurry water is greatly reduced, the papermaking cost is greatly reduced, and the resource waste is reduced.
Further, the beating process b2 further includes:
if the color of the current beating is different from the color of the last beating, the clean water and the precipitated fiber matched with the color of the current beating are used for beating operation.
As can be seen from the above description, when the paper making color of the paper machine is changed, the pulping color also needs to be changed, so that the pulping operation needs to be performed by using clean water and replacing the precipitated fibers matched with the color of the pulping process, thereby avoiding the occurrence of errors in the papermaking color.
Further, the sewage treatment process A also comprises a sewage treatment process A, wherein the sewage treatment process A comprises the following steps:
scheme a1: pumping sewage into a sewage storage pool for stirring and aeration, homogenizing the sewage, acidizing for adjusting and regulating the water quantity, and pumping the sewage into a sewage mixing pool;
scheme a2: the sewage mixing tank adopts an activated sludge process to carry out mixed oxidation on sewage, and utilizes the capability of aerobic bacteria for efficiently degrading organic matters to convert the sewage into CO 2 And H 2 0，；
Scheme a3: the sewage mixing tank conveys the treated sewage to a coagulation reaction tank and is quickly mixed with a coagulant of an added dispensing tank, so that suspended sludge in the sewage is destabilized;
scheme a4: conveying the sewage in the mixing tank to a primary sedimentation tank to coagulate suspended sludge in the sewage into large particles;
scheme a5: conveying sewage in the sedimentation tank to a secondary sedimentation tank, standing and sinking suspended sludge in the sewage by adopting a advection sedimentation process to enable the sewage to be layered to form bottom-layer sludge and supernatant, pumping the bottom-layer sludge into a sludge concentration tank, and overflowing the supernatant into a first clean water tank;
scheme a6: pumping the supernatant into an ozone decoloring tank for decoloring treatment in a first clean water tank;
scheme a7: the ozone decoloring tank is provided with an ozone generator, the supernatant pumped by the first clean water tank is dehydrated by utilizing the strong oxidizing property of ozone, and the processed supernatant is stored in the second clean water tank.
From the above description, the treatment process of 'storage aeration + acidification adjustment + mixed oxidation + coagulation reaction + precipitation separation + secondary precipitation + ozone oxidation' is used to separate and recycle the slag and 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 two types of clean water which is not decolorized in the first clean water tank and clean water which is sterilized and decolorized in the second clean water tank, wherein the clean water which is not decolorized can be used for cleaning and sanitation and making dark paper, and the clean water which is sterilized and decolorized can be used for replacing the color of new tissue paper. The process flow is used for grading treatment and recycling of sewage according to different use, so that the effects of economy and energy conservation are achieved.
Further, the step a2 further includes:
and (3) refluxing part of activated sludge in the treated sewage to the sewage storage pool, culturing facultative bacteria in the sewage storage pool under anaerobic conditions, acidifying and degrading refractory macromolecular organic matters in the activated sludge into organic acids, catalyzing pigments of the activated sludge, neutralizing chemical components of the activated sludge, and performing precipitation operation.
From the above description, it is known that part of the activated sludge of the sewage treated by the sewage mixing tank flows back to the sewage storage tank, so that the sewage can be utilized and treated, and the utilization rate is improved.
Further, the step a5 further includes:
and the sludge concentration tank stores, concentrates and digests the pumped sludge to obtain supernatant and sludge at the bottom, pumps the sludge at the bottom into a sludge press filter for dehydration treatment, and returns the supernatant to the sewage storage tank for treatment.
From the above description, the bottom sludge can be treated to obtain supernatant after being pumped into the sludge concentration tank and then flows back to the sewage storage pool for recycling, so that water resources and cost are effectively saved, and the recycling rate is improved.
Example 1
Referring to fig. 1, a method for treating color tissue paper wastewater with zero discharge includes a paper machine wastewater treatment process B, wherein the paper machine wastewater treatment process B includes:
precipitation scheme b1:
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 collecting operation, sedimentation operation and recycling operation without delay, and the secondary sedimentation tanks are used for storing precipitated fibers and pulping water;
the operation flow of the first-stage sedimentation tank for executing the collecting-sedimentation-recycling operation is as follows:
collecting: the first-stage sedimentation tank receives the color waste slurry produced in the production process and conveyed by the paper machine;
precipitation operation: after the collection operation is completed, precipitating and separating the colored waste slurry water to form supernatant and precipitated fibers;
and (3) recycling operation: pumping the supernatant back to a paper machine or a pulping pot for use, and conveying the precipitated fibers to a secondary precipitation tank for storage;
pulping process b2:
when the beating pot carries out beating operation, if the color of beating this time is the same with the color of beating last time, then use the sediment fibre that second grade sedimentation tank stored, the beating water uses the supernatant fluid that the first grade sedimentation tank stored or the beating water that the second grade sedimentation tank stored.
Wherein, the beating process b2 further comprises:
if the color of the current beating is different from the color of the last beating, the clean water and the precipitated fiber matched with the color of the current beating are used for beating operation. And uniformly cleaning the materials in the primary sedimentation tank and the secondary sedimentation tank, and preparing to collect and process the color waste slurry produced by the paper machine production.
The sewage treatment method further comprises a sewage treatment process A, wherein the sewage treatment process A comprises the following steps:
scheme a1: pumping sewage into a sewage storage pool for stirring and aeration, homogenizing the sewage, acidizing for adjusting and regulating the water quantity, and pumping the sewage into a sewage mixing pool;
scheme a2: the sewage mixing tank adopts an activated sludge process to carry out mixed oxidation on sewage, and utilizes the capability of aerobic bacteria for efficiently degrading organic matters to convert the sewage into CO 2 And H 2 0，；
Scheme a3: the sewage mixing tank conveys the treated sewage to a coagulation reaction tank and is quickly mixed with a coagulant of an added dispensing tank, so that suspended sludge in the sewage is destabilized;
scheme a4: conveying the sewage in the mixing tank to a primary sedimentation tank to coagulate suspended sludge in the sewage into large particles;
scheme a5: conveying sewage in the sedimentation tank to a secondary sedimentation tank, standing and sinking suspended sludge in the sewage by adopting a advection sedimentation process to enable the sewage to be layered to form bottom-layer sludge and supernatant, pumping the bottom-layer sludge into a sludge concentration tank, and overflowing the supernatant into a first clean water tank;
scheme a6: pumping the supernatant into an ozone decoloring tank for decoloring treatment in a first clean water tank;
scheme a7: the ozone decoloring tank is provided with an ozone generator, the supernatant pumped by the first clean water tank is dehydrated by utilizing the strong oxidizing property of ozone, and the processed supernatant is stored in the second clean water tank.
Specifically, the sewage stored in the sewage storage pool comprises domestic sewage, production sewage, emergency pool sewage, chemical warehouse sewage, paper machine sewage, pulp pool sewage, sedimentation tank sewage, boiler sewage and machine repair forklift sewage, and the sewage is input into the sewage storage pool through a sewage pump.
Wherein, after the step a2, the method further comprises:
and (3) refluxing part of activated sludge in the treated sewage to the sewage storage pool, culturing facultative bacteria in the sewage storage pool under anaerobic conditions, acidifying and degrading refractory macromolecular organic matters in the activated sludge into organic acids, catalyzing pigments of the activated sludge, neutralizing chemical components of the activated sludge, and performing precipitation operation.
Wherein, the process a5 further comprises the following steps after pumping the bottom sludge into the sludge concentration tank:
and the sludge concentration tank stores, concentrates and digests the pumped sludge to obtain supernatant and sludge at the bottom, pumps the sludge at the bottom into a sludge press filter for dehydration treatment, and returns the supernatant to the sewage storage tank for treatment.
It should be noted that the daily water consumption of a single paper machine is about 600 tons, and if the daily water is treated by the sewage treatment station, the treatment capacity is quite large, and the papermaking cost can be greatly increased. Therefore, an independent paper machine recycling system is adopted to execute the paper machine wastewater treatment process B, the daily discharge capacity (under the condition that the paper machine is not in color change) of a single paper machine is about 50 tons after passing through the paper machine wastewater treatment process B, the pressure of a sewage treatment station is greatly reduced, the papermaking cost is also greatly reduced, and the resource waste is reduced. While the sewage treatment station: the sewage treatment flow A of storage aeration, acidification adjustment, mixed oxidation, coagulation reaction, precipitation separation, secondary precipitation and ozone oxidation is used, so that sewage can be well decolorized, the sewage treatment capacity is about 360 tons in one day, and the treatment capacity meets the production requirement.
In summary, the method for treating wastewater of color tissue paper with zero discharge provided by the invention has the advantages that the wastewater treatment process B of the paper machine can precipitate all color wastewater from the first and second sedimentation tanks, and the wastewater is treated and used first, so that the treatment capacity of a sewage treatment station (namely a work station for executing the wastewater treatment process A) is greatly reduced, and the cost is reduced. And the sewage storage pool in the sewage treatment station collects all sewage, and precipitates after mixing, neutralizing and acidizing adjustment are used for making dark paper or cleaning, so that the treatment capacity of the ozone decolorizing tank is greatly reduced after the two steps, and the cost is greatly reduced. In addition, the paper made of the water used for production after ozone sterilization and decoloration can meet the food-grade requirement, and the detected escherichia coli can meet the national standard. Each treatment procedure uses a specific scheme for treatment, so that the whole cost is low and the effect is good. In addition, the recycling system of the paper machine (namely the system for executing the wastewater treatment flow 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 used in parallel, and are convenient to maintain and overhaul.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.
Claims (3)
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 of:
precipitation scheme b1:
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 collecting operation, sedimentation operation and recycling operation without delay, and the secondary sedimentation tanks are used for storing precipitated fibers and pulping water;
the operation flow of the first-stage sedimentation tank for executing the collecting-sedimentation-recycling operation is as follows:
collecting: the first-stage sedimentation tank receives the color waste slurry produced in the production process and conveyed by the paper machine;
precipitation operation: after the collection operation is completed, precipitating and separating the colored waste slurry water to form supernatant and precipitated fibers;
and (3) recycling operation: pumping the supernatant back to a paper machine or a pulping pot for use, and conveying the precipitated fibers to a secondary precipitation tank for storage;
pulping process b2:
when the beating pot performs beating operation, if the color of the beating is the same as the color of the last beating, using the precipitated fibers stored in the secondary sedimentation tank, and using supernatant liquid stored in the primary sedimentation tank or beating water stored in the secondary sedimentation tank for beating;
the beating process b2 further includes:
if the color of the current beating is different from the color of the last beating, using clear water and precipitated fibers matched with the color of the current beating to carry out beating operation;
the sewage treatment method also comprises a sewage treatment process A, wherein the sewage treatment process A comprises the following steps:
scheme a1: pumping sewage into a sewage storage pool for stirring and aeration, homogenizing the sewage, acidizing for adjusting and regulating the water quantity, and pumping the sewage into a sewage mixing pool;
scheme a2: the sewage mixing tank adopts an activated sludge process to carry out mixed oxidation on sewage, and utilizes the capability of aerobic bacteria for efficiently degrading organic matters to convert the sewage into CO 2 And H 2 0；
Scheme a3: the sewage mixing tank conveys the treated sewage to a coagulation reaction tank and is quickly mixed with a coagulant of an added dispensing tank, so that suspended sludge in the sewage is destabilized;
scheme a4: conveying the sewage in the mixing tank to a primary sedimentation tank to coagulate suspended sludge in the sewage into large particles;
scheme a5: conveying sewage in the sedimentation tank to a secondary sedimentation tank, standing and sinking suspended sludge in the sewage by adopting a advection sedimentation process to enable the sewage to be layered to form bottom-layer sludge and supernatant, pumping the bottom-layer sludge into a sludge concentration tank, and overflowing the supernatant into a first clean water tank;
scheme a6: pumping the supernatant into an ozone decoloring tank for decoloring treatment in a first clean water tank;
scheme a7: the ozone decoloring tank is provided with an ozone generator, the supernatant pumped by the first clean water tank is dehydrated by utilizing the strong oxidizing property of ozone, and the processed supernatant is stored in the second clean water tank.
2. The method for zero emission of colored tissue paper waste water according to claim 1, wherein said step a2 further comprises:
and (3) refluxing part of activated sludge in the treated sewage to the sewage storage pool, culturing facultative bacteria in the sewage storage pool under anaerobic conditions, acidifying and degrading refractory macromolecular organic matters in the activated sludge into organic acids, catalyzing pigments of the activated sludge, neutralizing chemical components of the activated sludge, and performing precipitation operation.
3. The process for zero emission of colored tissue paper wastewater according to claim 1, wherein said process a5 further comprises, after pumping the bottom sludge into the sludge thickener:
and the sludge concentration tank stores, concentrates and digests the pumped sludge to obtain supernatant and sludge at the bottom, pumps the sludge at the bottom into a sludge press filter for dehydration treatment, and returns the supernatant to the sewage storage tank for treatment.
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| CN202111612963.3A CN114349271B (en) | 2021-12-27 | 2021-12-27 | Zero-discharge treatment method for wastewater of color tissue paper |
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| CN202111612963.3A CN114349271B (en) | 2021-12-27 | 2021-12-27 | Zero-discharge treatment method for wastewater of color tissue paper |
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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 |
-
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 |
|---|
| 某造纸废水处理工程实例;杨柳;贾秀菊;张文芝;;河北建筑工程学院学报(01);第57-61页 * |
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