CN105271573A - Method for treating paper making wastewater by integrated membrane separation technology - Google Patents
Method for treating paper making wastewater by integrated membrane separation technology Download PDFInfo
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- CN105271573A CN105271573A CN201510711214.4A CN201510711214A CN105271573A CN 105271573 A CN105271573 A CN 105271573A CN 201510711214 A CN201510711214 A CN 201510711214A CN 105271573 A CN105271573 A CN 105271573A
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Abstract
The invention discloses a method for treating paper making wastewater by an integrated membrane separation technology, and belongs to the technical field of environment protection. The method is realized by three parts including a pretreatment system, an UF (ultrafiltration) system and a nanofiltration system, wherein the UF system and the nanofiltration system are critical to the method. The method has the advantages that the no phase change exists in the separation process; the heating is not needed; the separation efficiency is high; the energy is saved; no pollution is caused; the process is simple; the operation is convenient; the process can be easily controlled, and the like. The energy sources are saved; useful resources such as hemicellulose and lignin can be recovered; the removal effect on impurities is obvious; the paper making wastewater is efficiently treated; in addition, the energy consumption in the treatment process is also effectively reduced. Great development potential is realized on the paper making wastewater deep treatment; good application prospects are also realized in the aspect of industrial wastewater treatment.
Description
Technical field
The invention belongs to environmental protection technical field, be specifically related to a kind of method utilizing Integrated Films isolation technique Processing Paper Wastewater.
Background technology
Paper industry is that energy consumption, material consumption are high, one of industry that environmental pollution is serious, and its polluting property is that wastewater discharge is large, and chemical oxygen demand (COD) (COD), suspended substance (SS) and colourity content are all higher.According to statistics in 2004, China's paper industry waste water annual emissions 3200000000 tons, accounted for 16%, the COD quantity discharged 1,490,000 tons of national trade effluent total release, accounts for 33% of national industrial COD total release, often produced one ton of finished paper, water consumption about 140 tons.In recent years, China's Paper Industry Development was very rapid, and consequent environmental pollution is also more and more serious.Paper-making industrial waste water, because its organic content is high and biodegradability is poor, can not obtain good removal effect with traditional biochemical process process, in the urgent need to improving existing pulping wastewater treatment technology.Original waste water treatment process mainly contains physical method, chemical process and bioremediation, mainly there is following shortcoming: physical method can only remove the large particulate matter in waste water, chemical process is mostly also in the laboratory study stage, practical engineering application have not been reported, the technics comparing complexity etc. of bioremediation.The appearance of novel film materials and membrane separation technique makes the process of paper waste have a good solution, membrane separation technique has sepn process without phase change, without the need to heating, separation efficiency is high, saving power and preventing pollution contaminates, technique is simple, easy to operate, the advantages such as process is easy to control, integrated membrane process is used by the combine with technique such as ultrafiltration (UF) and nanofiltration (NF), Integrated Films sepn process not only can reach the processing requirements to sewage, and the pollution of film can be alleviated, it is a kind of effective sewage disposal scheme, formation can meet wastewater deep treatment process, paper waste advanced treatment has very large development potentiality.
Summary of the invention
The object of the invention is to solve the shortcoming of prior art, provide that a kind of separation efficiency is high, energy-conservation, equipment is simple, the easy to operate and method of the Processing Paper Wastewater efficiently of environmentally friendly property.
A method for Integrated Films isolation technique Processing Paper Wastewater, the method is by pretreatment system, ultrafiltration (UF) system, and nanofiltration system 3 part forms, and wherein ultrafiltration system and nanofiltration system are the keys of the method.
The concrete treatment process of the present invention is: because paper waste is generally containing a large amount of vegetable fibres, very easily block micro-filtration and thinner film, so first will carry out coarse filtration to paper waste filter screen, the conventional pre-treatment such as to leave standstill; The strong basicity of paper waste, with dilute hydrochloric acid adjust pH to 7 ~ 8; Again under the effect of hydraulic pressure by water molecules and small-molecule substance etc. through ultra-filtration membrane, suspended particulates in water, fine-fibered, sizing material, Wet Strength Resin, sanitas etc. are then trapped within the internal surface of ultra-filtration membrane, can be removed the materials such as the suspended particulates in waste water, fine-fibered, sizing material, Wet Strength Resin, sanitas by UF ultra-filtration membrane; Again by waste water by being equipped with in the water tank of nanofiltration membrane, due to the nano level aperture of nanofiltration membrane, the impurity such as the chlorinated organics in waste water cannot through nanofiltration membrane, and water molecules can be through, the impurity such as the chlorinated organics in waste water can be separated with water by nanofiltration membrane, obtain purer water.
Advantage of the present invention and effect are:
Present method has sepn process without phase change, without the need to heating, saving power and preventing pollution dye, the advantage such as technique is simple, easy to operate, process is easy to control; Save energy, the useful resources such as recyclable hemicellulose and lignin; Remarkable to the removal effect of impurity; Not only process paper waste efficiently, and effectively reduce the energy consumption in treating processes.
Accompanying drawing explanation
For allowing preparation process of the present invention become apparent, the description of the drawings is as follows:
Fig. 1 illustrates a kind of preparation flow figure according to an embodiment of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1:
Get 1L paper waste sample, first waste water is left standstill, with filter screen by the visible vegetable fibre removing in waste water, due to the strong basicity of paper waste, then in waste water, add appropriate dilute hydrochloric acid the pH value of waste water is adjusted to 7 ~ 8; Again pretreated waste liquid is passed through ultra-filtration membrane, the removing impurity such as suspended particulates, fine-fibered, sizing material, Wet Strength Resin, sanitas wherein, obtains the water sample clarified; Last again by water liquid with joining the small-sized water tank containing nanofiltration membrane, the impurity such as the chlorinated organics in water are retained removing, and the water obtained reaches national grade one discharge standard, specifically in table 1.
Water quality situation after table 1 wastewater sample and embrane method process
| Project | pH | Specific conductivity/μ Scm -1 | COD/mg·L -1 | Turbidity/NTU | SS/mg·L -1 |
| Paper waste sample | 9～12 | >1500 | 100～400 | 10～55 | 150 |
| Membrane sepn produces water | 7～8 | 40 | 3.2 | 0.07 | 0 |
| Discharging standards | 6.5～7.5 | <400 | <10 | <1.0 | <10 |
Claims (4)
1. one kind utilizes the method for Integrated Films isolation technique Processing Paper Wastewater, it is characterized in that: the method is by pretreatment system, ultrafiltration (UF) system, nanofiltration system and cleaning system 4 part composition, wherein ultrafiltration system and reverse osmosis system are the keys of the method.
2. utilize concrete steps for Integrated Films isolation technique Processing Paper Wastewater, it is characterized in that: the conventional pre-treatment such as first will carry out coarse filtration to paper waste, leave standstill, and with dilute hydrochloric acid, the pH value of waste water is adjusted to 7 ~ 8; Again under the effect of hydraulic pressure by water molecules and small-molecule substance etc. through ultra-filtration membrane, the materials such as the suspended particulates in waste water, fine-fibered, sizing material, Wet Strength Resin, sanitas can be removed; Again by waste water by being equipped with in the water tank of nanofiltration membrane, the impurity such as chlorinated organics in removing waste water, obtains the water meeting national wastewater discharge standard.
3. method according to claim 2, is characterized in that: described pre-treatment comprises conventional processing the pH value dilute hydrochloric acid of waste water is adjusted to 7 ~ 8 such as carrying out coarse filtration to paper waste, leave standstill.
4. method according to claim 2, is characterized in that: according to circumstances adopt corresponding chemical medicine to carry out clean to film, makes film recover normal penetrating amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510711214.4A CN105271573A (en) | 2015-10-27 | 2015-10-27 | Method for treating paper making wastewater by integrated membrane separation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510711214.4A CN105271573A (en) | 2015-10-27 | 2015-10-27 | Method for treating paper making wastewater by integrated membrane separation technology |
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| Publication Number | Publication Date |
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| CN105271573A true CN105271573A (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510711214.4A Pending CN105271573A (en) | 2015-10-27 | 2015-10-27 | Method for treating paper making wastewater by integrated membrane separation technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105923814A (en) * | 2016-04-26 | 2016-09-07 | 湖南卡普斯环保科技股份有限公司 | Double-membrane treatment method for waste water produced in wet-process fiberboard production |
-
2015
- 2015-10-27 CN CN201510711214.4A patent/CN105271573A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105923814A (en) * | 2016-04-26 | 2016-09-07 | 湖南卡普斯环保科技股份有限公司 | Double-membrane treatment method for waste water produced in wet-process fiberboard production |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160127 |
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| WD01 | Invention patent application deemed withdrawn after publication |