CN105084621A - Recycling method of laundry wastewater - Google Patents
Recycling method of laundry wastewater Download PDFInfo
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- CN105084621A CN105084621A CN201510508189.XA CN201510508189A CN105084621A CN 105084621 A CN105084621 A CN 105084621A CN 201510508189 A CN201510508189 A CN 201510508189A CN 105084621 A CN105084621 A CN 105084621A
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- sewage
- water
- laundry
- oxidation
- utilization method
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- 239000002351 wastewater Substances 0.000 title abstract description 5
- 238000004064 recycling Methods 0.000 title abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000010865 sewage Substances 0.000 claims abstract description 34
- 230000001112 coagulant Effects 0.000 claims abstract description 31
- 238000005406 washing Methods 0.000 claims abstract description 26
- 239000000701 coagulant Substances 0.000 claims abstract description 23
- 230000003647 oxidation Effects 0.000 claims abstract description 23
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 23
- 238000001556 precipitation Methods 0.000 claims abstract description 13
- 239000004519 grease Substances 0.000 claims abstract description 10
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 8
- CBENFWSGALASAD-UHFFFAOYSA-N ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 3
- VSCWAEJMTAWNJL-UHFFFAOYSA-K Aluminium chloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 26
- 150000001875 compounds Chemical class 0.000 claims description 17
- 230000001954 sterilising Effects 0.000 claims description 15
- 238000004062 sedimentation Methods 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 11
- 229920001661 Chitosan Polymers 0.000 claims description 10
- 238000000746 purification Methods 0.000 claims description 8
- 238000003302 UV-light treatment Methods 0.000 claims description 6
- 230000003197 catalytic Effects 0.000 claims description 5
- 230000000249 desinfective Effects 0.000 abstract description 6
- 230000000593 degrading Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 230000001699 photocatalysis Effects 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 239000008213 purified water Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 7
- 239000006228 supernatant Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000000903 blocking Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 210000004369 Blood Anatomy 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001376 precipitating Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000001131 transforming Effects 0.000 description 1
Abstract
The invention relates to a recycling method of laundry wastewater, which comprises the following steps: 1. collecting sewage generated by all washing procedures in the laundry into a sewage storage tank, and inputting compressed air into the sewage storage tank through an air cylinder, wherein the compressed air generates abundant bubbles after the pressure relief, and the bubbles adhere to grease in the sewage and float to the water surface, and the bubbles with the grease can be scraped; 2. adding a composite coagulant into the sewage to perform coagulative precipitation, and separating to remove the precipitate; 3. carrying out oxidation and disinfection: the oxidation is implemented by further degrading organic matters in water under the action of photocatalytic oxidation, and the disinfection is performed by ozone generated by an electrolyzer and ultraviolet light generated by an ultraviolet lamp; and 4. after the oxidation and disinfection, collecting the water into a washing circulating water storage tank, mixing with external purified water, and recycling to the next washing process. The method has the advantages of simple operation steps and low cost, and is suitable for large-scale popularization and application.
Description
Technical field
The present invention relates to a kind of wastewater recycling method, be specifically related to a kind of circulation utilization method of laundry effluents.
Background technology
Along with the fast development of economy, bath water amount improves year by year, and washes mainly refers to the waste water that washing of drum type washing machine clothing produces, and belongs to buck one class, and principal pollutant are anion surfactant, and its pollution level is relative to lighter Heisui River.Washes mainly from hotel, family, laundry etc., if this kind of waste water be back to flush the toilet, the miscellaneous water such as greening, usually also exist that the difficult treatment of pollutent, pipeline transformation are complicated, the water yield is difficult to the problems such as balance.At present, clothing is all delivered to fixed point laundry wash by the places such as most of hotels, and therefore, the discharge Relatively centralized of wash water, is easy to collection and treatment and recycle.
The people such as Guo Jingjing (" recycle of laundry effluents ", " water resources protection ", in March, 2005,21st volume the 2nd phase, 19-20 page) disclose a kind of circulation utilization method of laundry effluents, the sewage produced by all washing procedures is all collected in buck storage pool, first through air supporting, utilize dissolving to be inputted by pressurized air in former water, after pressure release, produce a large amount of bubble, climb up on top of the water after these bubble adhesion greases and struck off; Then carry out coagulating sedimentation and remove suspended substance; Finally carry out being oxidized and sterilizing, oxidation adopts high-level oxidation technology-photocatalysis oxidation technique, Organic substance in water of degrading further; The ozone that sterilization adopts electrolyzer to produce and the UV-light that middle pressure UV-lamp produces realize; After oxidation sterilizing, water is collected cycles of washing and utilize water storage pool, mix Posterior circle with fresh water according to the ratio of 3:1 again and use washing degree next time, the method can save the consumption of fresh water on steamer, and on alleviation steamer, Freshwater resources is in short supply, reduces the quantity discharged of laundry effluents.
A kind of recycle of laundry effluents is prior art discloses although above-mentioned, certain needs can be met, but still there is certain defect in these: when adopting coagulating agent to carry out coagulating sedimentation, even if the suspended substance precipitation of producing is after standing for some time, still be suspended in whole water solution system, densification can not condense in bottom, if want to remove these suspended substances, need to adopt filter plates or centrifugal method, because suspended substance has certain viscosity, the filter plate that easy blocking is filtered, the separation causing suspended substance to precipitate like this is removed operation and is bothered very much, be not suitable for large-scale promotion application.
Therefore, the circulation utilization method for laundry effluents exists and further improves and optimize demand, and this is also one of study hotspot and emphasis in this technical field, especially the power that is accomplished of the present invention and starting point place.
Summary of the invention
In order to overcome the above-mentioned technical problem that prior art exists, the present inventor after having carried out a large amount of further investigations, thus completes the present invention.
The present invention is achieved through the following technical solutions, and in particular to a kind of circulation utilization method of laundry effluents, comprises the following steps:
Step one, the sewage collecting produced by all washing procedures of laundry, in sewage storage pool, utilizes gas tank to be inputted by pressurized air in sewage storage pool, produces a large amount of bubble after compressed-air actuated pressure release, climb up on top of the water after grease in these bubble adhesion sewage, struck off;
Step 2, adds compound coagulant and carries out coagulating sedimentation, and be separated and remove precipitation, described compound coagulant is made up of polymerize aluminum chloride and chitosan;
Step 3, carries out being oxidized and sterilizing, and described oxidation adopts photochemical catalytic oxidation to degrade further Organic substance in water, and the ozone that described sterilization adopts electrolyzer to produce and the UV-light that UV-lamp produces are carried out;
Step 4, collects water in circulating washing water storage pool after oxidation sterilizing, then after mixing with the water purification of external source, recycle is to washing process next time.
Preferably, in step 2, described compound coagulant is by weight ratio 1:(1-5) polymerize aluminum chloride and chitosan form, this scope includes any concrete point value belonged to wherein, such as 1:1,1:2,1:3,1:4,1:5, most preferably 1:3, also includes the scope that any two point values in these concrete point values are formed, more preferably 1:(2-4).
Preferably, in step 2, the weight of described compound coagulant accounts for the 1-4% of sewage weight, this scope includes any concrete point value belonged to wherein, such as 1%, 2%, 3%, 4%, most preferably 2%, also include the scope that any two point values in these concrete point values are formed, more preferably 2-3%.
Preferably, in step 4, the water purification of the water in described circulating washing water storage pool and external source is according to volume ratio (2-6): 1 mixes, and more preferably mixes according to volume ratio 3:1.
Compared with prior art, beneficial effect of the present invention is as follows: method provided by the invention is when adopting coagulating agent to carry out coagulating sedimentation, the precipitation produced fine and close can be bonded in the bottom of container, aqueous solution part above only just can easily need realize precipitating and being separated of liquid by siphon or overflow, simple to operate, cost is low, is applicable to large-scale promotion application.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
Embodiment 1
The present embodiment relates to a kind of circulation utilization method of laundry effluents, is made up of following steps:
Step one, the sewage collecting produced by all washing procedures of laundry, in sewage storage pool, utilizes gas tank to be inputted by pressurized air in sewage storage pool, produces a large amount of bubble after compressed-air actuated pressure release, climb up on top of the water after grease in these bubble adhesion sewage, this part grease is struck off;
Step 2, add the compound coagulant be made up of the polymerize aluminum chloride of weight ratio 1:1 and chitosan and carry out coagulating sedimentation, the weight consumption of compound coagulant accounts for 2% of sewage weight, after stirring 0.5h, room temperature hold over night, one deck precipitation can be bonded in the bottom of container, siphon supernatant liquor;
Step 3, is undertaken being oxidized and sterilizing by above-mentioned supernatant liquor, and oxidation adopts photochemical catalytic oxidation 12h to degrade further Organic substance in water, and the UV-light that the ozone adopting electrolyzer to produce and UV-lamp produce carries out disinfection 2h;
Step 4, collects water in circulating washing water storage pool after oxidation sterilizing, then mixes according to volume ratio 6:1 with the water purification of external source, and recycle is to washing process next time.
Embodiment 2
The present embodiment relates to a kind of circulation utilization method of laundry effluents, is made up of following steps:
Step one, the sewage collecting produced by all washing procedures of laundry, in sewage storage pool, utilizes gas tank to be inputted by pressurized air in sewage storage pool, produces a large amount of bubble after compressed-air actuated pressure release, climb up on top of the water after grease in these bubble adhesion sewage, this part grease is struck off;
Step 2, add the compound coagulant be made up of the polymerize aluminum chloride of weight ratio 1:3 and chitosan and carry out coagulating sedimentation, the weight consumption of compound coagulant accounts for 4% of sewage weight, after stirring 0.5h, room temperature hold over night, one deck precipitation can be bonded in the bottom of container, siphon supernatant liquor;
Step 3, is undertaken being oxidized and sterilizing by above-mentioned supernatant liquor, and oxidation adopts photochemical catalytic oxidation 12h to degrade further Organic substance in water, and the UV-light that the ozone adopting electrolyzer to produce and UV-lamp produce carries out disinfection 2h;
Step 4, collects water in circulating washing water storage pool after oxidation sterilizing, then mixes according to volume ratio 2:1 with the water purification of external source, and recycle is to washing process next time.
Embodiment 3
The present embodiment relates to a kind of circulation utilization method of laundry effluents, is made up of following steps:
Step one, the sewage collecting produced by all washing procedures of laundry, in sewage storage pool, utilizes gas tank to be inputted by pressurized air in sewage storage pool, produces a large amount of bubble after compressed-air actuated pressure release, climb up on top of the water after grease in these bubble adhesion sewage, this part grease is struck off;
Step 2, add the compound coagulant be made up of the polymerize aluminum chloride of weight ratio 1:5 and chitosan and carry out coagulating sedimentation, the weight consumption of compound coagulant accounts for 1% of sewage weight, after stirring 0.5h, room temperature hold over night, one deck precipitation can be bonded in the bottom of container, siphon supernatant liquor;
Step 3, is undertaken being oxidized and sterilizing by above-mentioned supernatant liquor, and oxidation adopts photochemical catalytic oxidation 12h to degrade further Organic substance in water, and the UV-light that the ozone adopting electrolyzer to produce and UV-lamp produce carries out disinfection 2h;
Step 4, collects water in circulating washing water storage pool after oxidation sterilizing, then mixes according to volume ratio 3:1 with the water purification of external source, and recycle is to washing process next time.
Comparative example 1
This comparative example is with the difference of embodiment 1: step 2, adds polymerize aluminum chloride and carry out coagulating sedimentation as coagulating agent.
Comparative example 2
This comparative example is with the difference of embodiment 2: step 2, adds polymerize aluminum chloride and carry out coagulating sedimentation as coagulating agent.
Comparative example 3
This comparative example is with the difference of embodiment 3: step 2, adds polymerize aluminum chloride and carry out coagulating sedimentation as coagulating agent.
Result is observed
Embodiment 1-3: in step 2, the precipitation that coagulation produces can be bonded in the bottom of container, and aqueous solution part above only need by siphon, just easily can realize being separated of precipitation and liquid, simple to operate.
Comparative example 1-3: in step 2, the precipitation that coagulation produces still disperse is suspended in whole water solution system, densification can not be bonded in bottom, cannot, by siphon or overflow precipitation separation and liquid, if want to remove these suspended sediments, need to adopt filter plates or centrifugal method, not only add complicacy and the cost of operation, and there is certain viscosity due to these suspended sediments, easily blocking the filter plate of filtration when filtering, being not suitable for large-scale promotion application.
Therefore, the present invention adds the compound coagulant be made up of polymerize aluminum chloride and chitosan and carries out coagulating sedimentation in step 2, with being separated of liquid, there is material impact for realizing precipitation in this step smoothly, particularly, when the weight ratio of polymerize aluminum chloride in compound coagulant and chitosan is 1:(1-5), the weight consumption of compound coagulant is when accounting for the 1-4% of sewage weight, above-mentioned effect is more remarkable.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (7)
1. a circulation utilization method for laundry effluents, is characterized in that, comprises the following steps:
Step one, the sewage collecting produced by all washing procedures of laundry, in sewage storage pool, utilizes gas tank to be inputted by pressurized air in sewage storage pool, produces a large amount of bubble after compressed-air actuated pressure release, climb up on top of the water after grease in these bubble adhesion sewage, struck off;
Step 2, adds compound coagulant and carries out coagulating sedimentation in sewage, and be separated and remove precipitation, described compound coagulant is made up of polymerize aluminum chloride and chitosan;
Step 3, carries out being oxidized and sterilizing, and described oxidation adopts photochemical catalytic oxidation to degrade further Organic substance in water, and the ozone that described sterilization adopts electrolyzer to produce and the UV-light that UV-lamp produces are carried out;
Step 4, collects water in circulating washing water storage pool after oxidation sterilizing, then after mixing with the water purification of external source, recycle is to washing process next time.
2. the circulation utilization method of a kind of laundry effluents as claimed in claim 1, is characterized in that, in step 2, the weight ratio of described polymerize aluminum chloride and described chitosan is 1:(1-5).
3. the circulation utilization method of a kind of laundry effluents as claimed in claim 2, is characterized in that, in step 2, the weight ratio of described polymerize aluminum chloride and described chitosan is 1:3.
4. the circulation utilization method of a kind of laundry effluents as claimed in claim 1, is characterized in that, in step 2, the weight of described compound coagulant accounts for the 1-4% of sewage weight.
5. the circulation utilization method of a kind of laundry effluents as claimed in claim 4, is characterized in that, in step 2, the weight of described compound coagulant accounts for 2% of sewage weight.
6. the circulation utilization method of a kind of laundry effluents as claimed in claim 1, is characterized in that, in step 4, the water purification of the water in described circulating washing water storage pool and external source is according to volume ratio (2-6): 1 mixes.
7. the circulation utilization method of a kind of laundry effluents as claimed in claim 6, is characterized in that, in step 4, the water in described circulating washing water storage pool mixes according to volume ratio 3:1 with the water purification of external source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510508189.XA CN105084621A (en) | 2015-08-18 | 2015-08-18 | Recycling method of laundry wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510508189.XA CN105084621A (en) | 2015-08-18 | 2015-08-18 | Recycling method of laundry wastewater |
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| Publication Number | Publication Date |
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| CN105084621A true CN105084621A (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510508189.XA Pending CN105084621A (en) | 2015-08-18 | 2015-08-18 | Recycling method of laundry wastewater |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109231642A (en) * | 2018-09-25 | 2019-01-18 | 安顺优品洗涤有限公司 | A kind of purification method of wash water |
| CN113292178A (en) * | 2021-05-25 | 2021-08-24 | 阿夸森科技（北京）有限公司 | Method for treating fabric washing sewage by combining air flotation flocculation with ozone advanced oxidation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1266821A (en) * | 1999-03-12 | 2000-09-20 | 中国科学院生态环境研究中心 | Polyaluminium chloride and chitin compounded efficient flocculant and its preparing process |
-
2015
- 2015-08-18 CN CN201510508189.XA patent/CN105084621A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1266821A (en) * | 1999-03-12 | 2000-09-20 | 中国科学院生态环境研究中心 | Polyaluminium chloride and chitin compounded efficient flocculant and its preparing process |
Non-Patent Citations (3)
| Title |
|---|
| 刘秉涛 等: ""聚合氯化铝/壳聚糖复合絮凝剂在活性污泥中的调理作用"", 《环境化学》 * |
| 石宝友 等: "聚合铝与有机高分子复合絮凝剂的絮凝性能及其吸附特性", 《环境科学》 * |
| 郭晶晶 等: ""洗衣房废水的循环利用"", 《水资源保护》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109231642A (en) * | 2018-09-25 | 2019-01-18 | 安顺优品洗涤有限公司 | A kind of purification method of wash water |
| CN113292178A (en) * | 2021-05-25 | 2021-08-24 | 阿夸森科技（北京）有限公司 | Method for treating fabric washing sewage by combining air flotation flocculation with ozone advanced oxidation |
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Application publication date: 20151125 |