CN102633335B - Sewage treatment method - Google Patents
Sewage treatment method Download PDFInfo
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- CN102633335B CN102633335B CN 201210116744 CN201210116744A CN102633335B CN 102633335 B CN102633335 B CN 102633335B CN 201210116744 CN201210116744 CN 201210116744 CN 201210116744 A CN201210116744 A CN 201210116744A CN 102633335 B CN102633335 B CN 102633335B
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Abstract
The invention discloses a sewage treatment method comprising the following steps of: (i) mixing an aluminum oxide solution with an ammonium carbonate solution; agitating uniformly to obtain poly-aluminum chloride for future use; (ii) mixing an acrylic amide solution with an acrylic acid solution; dripping a sodium hydroxide solution into the mixed solution to adjust the pH (Potential of Hydrogen) to be neutral; introducing nitrogen gas and adding an ammonium persulfate solution; shaking uniformly and adding a sodium hydrogensulfite solution to react to obtain polyacrylamide for future use; and (iii) taking sewage and adding the poly-aluminum chloride into the sewage; agitating and adding the polyacrylamide after fine suspension particles appear in the sewage; and agitating and standing after a flocculating constituent appears in the sewage. The sewage treatment method disclosed by the invention has the properties of short flocculating time, long storage time of the flocculating constituent, great impact strength of the flocculating constituent, high COD (Chemical Oxygen Demand) removing rate and good de-coloring effect, and can be widely applied to the treatment of various types of the sewage, particularly papermaking middle-section sewage treatment.
Description
Technical field
The present invention relates to a kind of sewage water treatment method, specifically a kind for the treatment of process for the treatment of various sewage especially paper-making medium wastewater.
Background technology
Along with the development of modern industry, the discharging of large amount of sewage, severe contamination the environment of human survival, thereby water pollution is mankind's problem demanding prompt solutions.Paper waste is one of major polluting sources of water pollution, contains the impurity such as a large amount of fine-fibereds, resin, colorant in its papermaking midcourse wastewater, as when discharging not in addition processing water resources is seriously damaged.The treatment technology of paper waste is more both at home and abroad, and wherein the most widely used is flocculent precipitation, namely utilizes flocculation agent that the fine-grained solids that disperses in sewage liquid is formed throw out, and redeposition filters throw out, reaches the decontamination purpose.At present, process the normal flocculation agent that uses of papermaking midcourse wastewater inorganic flocculating agent, inorganic polymer flocculant and organic polymer coargulator are arranged, compare with inorganic flocculating agent, the organic floculant consumption is few, flocculation rate is fast, salt, medium and the ambient temperature effect of being coexisted is little, treating processes is short, the sludge quantity that generates is few, but it is expensive, and mostly flocculation agent itself or its hydrolysis, degraded product are poisonous, so is subject to certain restrictions, the defective of disposing of sewage for overcoming single flocculation agent, people usually use composite flocculation agent.Disclose a kind of effective flocculating agent for paper making waste water and preparation method thereof as CN101085687A, this flocculation agent is with water glass, water mixing, adds liquid aluminium sulfate, adds sodium carbonate after reacting by heating, regulates the reaction of proper pH value post-heating, after slaking 24 h, gets product.Although the method cost is lower, removal efficiency is higher, complicated process of preparation, the COD clearance is low, and flco easily disperses.In addition, part industrial enterprise also has and polymerize aluminum chloride, polyacrylamide and other reagent are formulated as composite flocculation agent dispose of sewage, but because the preparation method of polymerize aluminum chloride used and polyacrylamide is unreasonable, in formula, the composite using method of all ingredients is not good enough, cause flocculation time occurring in decontamination process long, the flocs unit shelf time is short, and staple fibre easily disperses, the problem that the COD clearance is low.
Summary of the invention
Purpose of the present invention just is to provide a kind of sewage water treatment method, has to solve the problem that flocculation rate is slow, the flco shelf time is short, the flco impact resistance is poor, the COD clearance is low when existing method is disposed of sewage.
The objective of the invention is to be achieved through the following technical solutions:
A kind of sewage water treatment method provided by the present invention, it comprises the following steps:
(i) preparation of polymerize aluminum chloride: be 15～25% liquor alumini chloridi than concentration with quality be that 15～25% sal volatile is that 1 ︰ (0.8～1.5) mixes by volume with quality than concentration, stirring and evenly mixing gets polymerize aluminum chloride, and is standby;
The (ii) preparation of polyacrylamide: be 15～25% acrylamide soln than concentration with quality be that 15～25% acrylic acid solution is that 1 ︰ (0.8～1.5) mixes by volume with quality than concentration, get mixed solution, drip sodium hydroxide solution and regulate its pH value for neutral in this mixed solution, logical nitrogen 20～30 min, adding quality is 15～25% ammonium persulfate solution than concentration, shake up, then to add quality be 15～25% sodium sulfite solution than concentration, after reaction polyacrylamide; The volume ratio of wherein said ammonium persulfate solution, sodium sulfite solution and mixed solution is 0.2 ︰ 0.1 ︰ 1.
(iii) get sewage, the polymerize aluminum chloride that adds (i) step to prepare in sewage, stir 0.5～2 min, tiny suspended particulate occurs in sewage after, the polyacrylamide that adds again (ii) step to prepare, stir 1～2 min, occur after flocs unit standingly in sewage, the volume ratio of wherein said interpolation polymerize aluminum chloride, polyacrylamide and sewage is (0.2～0.35) ︰ (0.03～0.06) ︰ 100.
The preferred volume ratio of the described liquor alumini chloridi of the present invention (i) step and sal volatile is 1 ︰ (1～1.1).
The present invention (ii) preferred volume ratio of the described acrylamide soln of step and acrylic acid solution is 1 ︰ (0.9～1.1).
The present invention (ii) quality of the described sodium hydroxide solution of step is 10% than concentration.
The present invention (iii) preferred volume ratio of the described polymerize aluminum chloride of step, polyacrylamide and sewage is (0.25～0.3) ︰ (0.04～0.05) ︰ 100.
Sewage water treatment method provided by the invention, its decontamination mechanism is there are a large amount of positively chargeds in the self-control poly aluminium chloride in sewage polymerization plasma, micelle in sewage is played the effects such as adsorption bridging and charge neutrality, thereby make elimination of colloid stability, add again self-control polyacrylamide adsorption bridging, make flocculating effect reach optimum regime.
Innovation of the present invention is the preparation method of poly aluminium chloride and polyacrylamide, and the order of addition of two kinds of preparations and the selection of consumption proportion in the sewage disposal use procedure, this can solve and have the problem that flocculation rate is slow, the flco shelf time is short, the COD clearance is low in the process of disposing of sewage.
that uses in the present invention has very strong flocculation and Coagulation aiding from preparing polymeric aluminium chloride and polyacrylamide, colloidal particle in paper-making medium wastewater is taken off surely, and by the absorption charge neutrality, the effects such as adsorption bridging make pollutent form rapidly floc sedimentation, it is fast that its relatively existing processing papermaking wastewater flocculation agent has flocculation rate, the flco shelf time is of a specified duration, percent of decolourization and COD clearance all can reach more than 95%, pH is applied widely, do wet tenacity good, the impact of high pressure resistant water, staple fibre is not easy the advantages such as dispersion, and the prices of raw and semifnished materials are cheap, preparation technology is simple, easy for operation, not only can be widely used in paper-making medium wastewater processes, also can process any sanitary sewage and industrial sewage.
Embodiment
Following embodiment is used for further describing the present invention, but does not limit in any form the present invention.
Embodiment 1
Get 150 g Aluminum chloride anhydrouss, slowly add 750 ml ultrapure waters after pulverizing, put into dissolving vessel, start magnetic stirring apparatus, making it fully be dissolved into mass ratio is 20% liquor alumini chloridi; Get volatile salt 50g again, add and put into dissolving vessel, add 250 ml ultrapure waters, fully stir, making it fully be dissolved into mass ratio is 20% sal volatile.Then be that 1 ︰ 0.8 puts into the chemical combination tank by volume with liquor alumini chloridi and the sal volatile for preparing, violent stirring is fully mixed two kinds of solution, namely obtains poly aluminium chloride, and is standby.Get the 150g acrylamide, slowly add 750 ml ultrapure waters, put into dissolving vessel, start magnetic stirring apparatus, making it fully be dissolved into mass ratio is 20% acrylamide soln; Get 150 g vinylformic acid, slowly add the 750ml ultrapure water, making it fully be dissolved into mass ratio is 20% acrylic acid solution; Getting mass ratio and be 20% acrylamide soln is that 1 ︰ 0.8 mixes with mass ratio 20% acrylic acid solution by volume, get mixed solution, the dropping quality is 10% sodium hydroxide solution regulator solution pH to 7 than concentration in this mixed solution, then putting into polymerization bottle vacuumizes, after logical nitrogen 20 min, then to add mass ratio be 20% ammonium persulphate promotor, shakes up, adding mass ratio is the synthetic polyacrylamide of 20% sodium sulfite solution again, thereby it is standby to obtain polyacrylamide; And the volume ratio that makes the ammonium persulfate solution, sodium sulfite solution and the above-mentioned mixed solution that add is 0.2 ︰ 0.1 ︰ 1.
When disposing of sewage water sample, get 200 mL sewage and be placed in 500 mL beakers, start magnetic stirring apparatus after adding 0.5 ml poly aluminium chloride, after transferring mixing speed to be 100 r/min, stir 1 min, then add 0.08 ml polyacrylamide, after stirring 1 min, water sample is moved in the graduated cylinder of 500 mL, standing.
Embodiment 2
Get 150 g Aluminum chloride anhydrouss, slowly add 750 ml ultrapure waters after pulverizing, put into dissolving vessel, start magnetic stirring apparatus, making it fully be dissolved into mass ratio is 20% liquor alumini chloridi; Get volatile salt 50g again, add and put into dissolving vessel, add the 250ml ultrapure water, fully stir, making it fully be dissolved into mass ratio is 20% sal volatile.Then be that 1 ︰ 1.5 puts into the chemical combination tank by volume with liquor alumini chloridi and the sal volatile for preparing, violent stirring is fully mixed two kinds of solution, namely obtains poly aluminium chloride, and is standby.get the 150g acrylamide, slowly add the 750ml ultrapure water, put into dissolving vessel, start magnetic stirring apparatus, making it fully be dissolved into mass ratio is 20% acrylamide soln, get 150g vinylformic acid, slowly add the 750ml ultrapure water, making it fully be dissolved into mass ratio is 20% acrylic acid solution, getting quality and than concentration be 20% acrylamide soln is that 20% acrylic acid solution is that 1 ︰ 1.5 mixes by volume with quality than concentration, get mixed solution, the dropping quality is 10% sodium hydroxide solution regulator solution pH to 7 than concentration in this mixed solution, then putting into polymerization bottle vacuumizes, after logical nitrogen 25 min, adding mass ratio is 20% ammonium persulphate promotor again, shake up, adding mass ratio is the synthetic polyacrylamide of 20% sodium sulfite solution again, thereby it is standby to obtain polyacrylamide, and make the ammonium persulfate solution that adds, the volume ratio of sodium sulfite solution and above-mentioned mixed solution is 0.2 ︰ 0.1 ︰ 1.
When disposing of sewage water sample, get 200 mL sewage and be placed in 500 mL beakers, start magnetic stirring apparatus after adding 0.6 ml poly aluminium chloride, after transferring mixing speed to be 100 r/min, stir 0.5 min, then add 0.1 ml polyacrylamide, after stirring 1.5 min, water sample is moved in the graduated cylinder of 500 mL, standing.
Embodiment 3
Get 150 g Aluminum chloride anhydrouss, slowly add 750 ml ultrapure waters after pulverizing, put into dissolving vessel, start magnetic stirring apparatus, making it fully be dissolved into mass ratio is 20% liquor alumini chloridi; Get volatile salt 50g again, add and put into dissolving vessel, add the 250ml ultrapure water, fully stir, making it fully be dissolved into mass ratio is 20% sal volatile.Then be that 1 ︰ 1 puts into the chemical combination tank by volume with liquor alumini chloridi and the sal volatile for preparing, violent stirring is fully mixed two kinds of solution, namely obtains poly aluminium chloride, and is standby.get the 150g acrylamide, slowly add the 750ml ultrapure water, put into dissolving vessel, start magnetic stirring apparatus, making it fully be dissolved into mass ratio is 20% acrylamide soln, get 150g vinylformic acid, slowly add the 750ml ultrapure water, making it fully be dissolved into mass ratio is 20% acrylic acid solution, getting quality and than concentration be 20% acrylamide soln is that 20% acrylic acid solution is that 1 ︰ 1 mixes by volume with quality than concentration, get mixed solution, the dropping quality is 10% sodium hydroxide solution regulator solution pH to 7 than concentration in this mixed solution, then putting into polymerization bottle vacuumizes, after logical nitrogen 30 min, adding quality is 20% ammonium persulphate promotor than concentration again, shake up, adding quality is the synthetic polyacrylamide of 20% sodium sulfite solution than concentration again, thereby it is standby to get polyacrylamide, and make the ammonium persulfate solution that adds, the volume ratio of sodium sulfite solution and above-mentioned mixed solution is 0.2 ︰ 0.1 ︰ 1.
When disposing of sewage water sample, get 200 mL sewage and be placed in 500 mL beakers, start magnetic stirring apparatus after adding 0.4 ml poly aluminium chloride, after transferring mixing speed to be 100 r/min, stir 2.0 min, then add 0.06 ml polyacrylamide, after stirring 2 min, water sample is moved in 500 mL graduated cylinders, standing.
Embodiment 4
Get 120 g Aluminum chloride anhydrouss, slowly add 800 ml ultrapure waters after pulverizing, put into dissolving vessel, start magnetic stirring apparatus, making it fully be dissolved into quality is 15% liquor alumini chloridi than concentration; Get volatile salt 45 g again, add and put into dissolving vessel, add 300 ml ultrapure waters, fully stir, making it fully be dissolved into quality is 15% sal volatile than concentration.Then be that 1 ︰ 1.1 puts into the chemical combination tank by volume with liquor alumini chloridi and the sal volatile for preparing, violent stirring is fully mixed two kinds of solution, namely obtains poly aluminium chloride, and is standby.get 120 g acrylamides, slowly add 800 ml ultrapure waters, put into dissolving vessel, start magnetic stirring apparatus, making it fully be dissolved into mass ratio is 15% acrylamide soln, get 120 g vinylformic acid, slowly add 800 ml ultrapure waters, making it fully be dissolved into quality is 15% acrylic acid solution than concentration, getting quality and than concentration be 15% acrylamide soln is that 15% acrylic acid solution is that 1 ︰ 0.9 mixes by volume with quality than concentration, get mixed solution, the dropping quality is 10% sodium hydroxide solution regulator solution pH to 7 than concentration in this mixed solution, then putting into polymerization bottle vacuumizes, after logical nitrogen 25 min, adding quality is 15% ammonium persulphate promotor than concentration again, shake up, adding quality is the synthetic polyacrylamide of 15% sodium sulfite solution than concentration again, thereby it is standby to obtain polyacrylamide, and make the ammonium persulfate solution that adds, the volume ratio of sodium sulfite solution and above-mentioned mixed solution is 0.2 ︰ 0.1 ︰ 1.
When disposing of sewage water sample, get 200 mL sewage and be placed in 500 mL beakers, start magnetic stirring apparatus after adding 0.5 ml poly aluminium chloride, after transferring mixing speed to be 100 r/min, stir 1.5 min, then add 0.11 ml polyacrylamide, after stirring 1.5 min, water sample is moved in the 500mL graduated cylinder, standing.
Embodiment 5
Get 150 g Aluminum chloride anhydrouss, slowly add 600 ml ultrapure waters after pulverizing, put into dissolving vessel, start magnetic stirring apparatus, making it fully be dissolved into quality is 25% liquor alumini chloridi than concentration; Get volatile salt 50g again, add and put into dissolving vessel, add the 200ml ultrapure water, fully stir, making it fully be dissolved into quality is 25% sal volatile than concentration.Then be that 1 ︰ 1 puts into the chemical combination tank by volume with liquor alumini chloridi and the sal volatile for preparing, violent stirring is fully mixed two kinds of solution, namely obtains poly aluminium chloride, and is standby.get 150 g acrylamides, slowly add 600 ml ultrapure waters, put into dissolving vessel, start magnetic stirring apparatus, making it fully be dissolved into quality is 25% acrylamide soln than concentration, get 150g vinylformic acid, slowly add the 600ml ultrapure water, making it fully be dissolved into mass ratio is 25% acrylic acid solution, getting quality and than concentration be 25% acrylamide soln and quality is that 25% acrylic acid solution is that 1 ︰ 0.9 mixes by volume than concentration, get mixed solution, the dropping quality is 10% sodium hydroxide solution regulator solution pH to 7 than concentration in this mixed solution, then putting into polymerization bottle vacuumizes, after logical nitrogen 20 min, adding quality is 25% ammonium persulphate promotor than concentration again, shake up, adding quality is the synthetic polyacrylamide of 25% sodium sulfite solution than concentration again, thereby it is standby to obtain polyacrylamide, and make the ammonium persulfate solution that adds, the volume ratio of sodium sulfite solution and above-mentioned mixed solution is 0.2 ︰ 0.1 ︰ 1.
When disposing of sewage water sample, get 200 mL sewage and be placed in 500 mL beakers, start magnetic stirring apparatus after adding 0.7 ml poly aluminium chloride, after transferring mixing speed to be 100 r/min, stir 1.5 min, then add 0.12 ml polyacrylamide, after stirring 1 min, water sample is moved in 500 mL graduated cylinders, standing.
Comparative Examples 1
Prepare following quality than the aqueous solution of concentration: 5% polymeric aluminum chlorides solution (PAC), 10% polyacrylamide improvement I type (PAM-I), 10% polyacrylamide improvement II type (PAM-II).
When disposing of sewage, get 200 mL sewage and be placed in the 500mL beaker, after adding 5.0 ml PAC, start magnetic stirring apparatus, after transferring mixing speed to be 100 r/min, stir 1 min, then add 4.5 ml PAM-I, add 3.5 ml PAM-II after stirring 1 min, after stirring 1 min, water sample is moved in 500 mL graduated cylinders, standing.
PAC, PAM-I and PAM-II come from Gongyi, Henan solid flocculation agent.
The detection method of embodiment 6 specific embodiment of the invention
(1) transparence detects: adopt spectrophotometry-722 type spectrophotometer;
(2) COD clearance: potassium dichromate process;
(3) flco resistance to impact shock coefficient: the suspended solid of settled layer and floating layer is collected, and dried, weigh; Calculate as follows:
The quality W of flco resistance to impact shock coefficient/ζ=settled layer suspended solid
1/ (the quality W of floating layer suspended solid
2The quality W of+settled layer suspended solid
1)
Detected result: see table 1 for details
Table 1 flocculation agent detergency ability detects
Sewage in embodiment is taken from Li Yuan paper mill, Baoding.
Shown by above data, sewage water treatment method provided by the invention will have that flocculation time is short, the flco shelf time for a long time, the flco resistance to impact shock is large, the COD clearance is high and good decolorizing effect.Therefore, the prices of raw and semifnished materials that the method adopts are cheap, and preparation technology is simple, and is easy to use, good in economic efficiency, is easy to apply.
Claims (5)
1. sewage water treatment method is characterized in that comprising the following steps:
(i) preparation of polymerize aluminum chloride: be 15～25% liquor alumini chloridi than concentration with quality be that 15～25% sal volatile is that 1 ︰ (0.8～1.5) mixes by volume with quality than concentration, stir, get polymerize aluminum chloride, standby;
The (ii) preparation of polyacrylamide: be 15～25% acrylamide soln than concentration with quality be that 15～25% acrylic acid solution is that 1 ︰ (0.8～1.5) mixes by volume with quality than concentration, get mixed solution, drip sodium hydroxide solution and regulate its pH value for neutral in mixed solution, logical nitrogen 20～30 min, adding quality is 15～25% ammonium persulfate solution than concentration, shake up, then to add quality be 15～25% sodium sulfite solution than concentration, after reaction polyacrylamide; The volume ratio of wherein said ammonium persulfate solution, sodium sulfite solution and mixed solution is 0.2 ︰ 0.1 ︰ 1;
(iii) get sewage, the polymerize aluminum chloride that adds (i) step to prepare in sewage, stir 0.5～2 min, tiny suspended particulate occurs in sewage after, the polyacrylamide that adds again (ii) step to prepare, stir 1～2 min, occur after flocs unit standingly in sewage, the volume ratio of wherein said polymerize aluminum chloride, polyacrylamide and sewage is (0.2～0.35) ︰ (0.03～0.06 ︰) 100.
2. sewage water treatment method according to claim 1, is characterized in that the described liquor alumini chloridi of (i) step and sal volatile are that 1 ︰ (1～1.1) mixes by volume.
3. sewage water treatment method according to claim 1, is characterized in that (ii) the described acrylamide soln of step is that 1 ︰ (0.9～1.1) mixes with acrylic acid solution by volume.
4. sewage water treatment method according to claim 1, is characterized in that (ii) the quality of the described sodium hydroxide solution of step is 10% than concentration.
5. sewage water treatment method according to claim 1, is characterized in that (iii) the volume ratio of the described polymerize aluminum chloride of step, polyacrylamide and sewage is (0.25～0.3) ︰ (0.04～0.05) ︰ 100.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210116744 CN102633335B (en) | 2012-04-20 | 2012-04-20 | Sewage treatment method |
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| CN 201210116744 CN102633335B (en) | 2012-04-20 | 2012-04-20 | Sewage treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103848933B (en) * | 2012-11-30 | 2016-03-09 | 中国石油天然气股份有限公司 | A kind of preparation method of flocculation agent and application thereof |
| CN105439266A (en) * | 2015-11-24 | 2016-03-30 | 宜兴市丰烨化学有限公司 | Acrylamide and dimethylamine containing flocculant and preparation method thereof |
| CN110040830A (en) * | 2019-05-30 | 2019-07-23 | 南华大学 | A kind of processing method of industrial wastewater |
| CN112694197A (en) * | 2021-03-24 | 2021-04-23 | 潍坊恒联特种纸有限公司 | Decolorizing process for color papermaking wastewater |
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| SK280649B6 (en) * | 1997-10-29 | 2000-05-16 | Prox T.E.C. Poprad | Method for water purification based on the fenton reaction |
| US20060201861A1 (en) * | 2003-12-23 | 2006-09-14 | Young Wing Y | Water treatment mixture and system for use |
| CN100537440C (en) * | 2006-07-21 | 2009-09-09 | 中国石油化工股份有限公司 | Processing method of urban sewage sludge reduction |
| CN102127188A (en) * | 2010-01-19 | 2011-07-20 | 抚顺市龙凤化工厂 | Preparation method of polyacrylamide with ultrahigh molecular weight |
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