CN102381742B - Processing method for deeply purifying urban sewage - Google Patents
Processing method for deeply purifying urban sewage Download PDFInfo
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- CN102381742B CN102381742B CN201110291938.XA CN201110291938A CN102381742B CN 102381742 B CN102381742 B CN 102381742B CN 201110291938 A CN201110291938 A CN 201110291938A CN 102381742 B CN102381742 B CN 102381742B
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- 239000010865 sewage Substances 0.000 title claims abstract description 27
- 238000003672 processing method Methods 0.000 title abstract description 6
- 239000011347 resin Substances 0.000 claims abstract description 107
- 229920005989 resin Polymers 0.000 claims abstract description 107
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000002253 acid Substances 0.000 claims abstract description 14
- 239000003513 alkali Substances 0.000 claims abstract description 7
- 230000008929 regeneration Effects 0.000 claims abstract description 7
- 238000011069 regeneration method Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 15
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical class OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 12
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 10
- 238000005349 anion exchange Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 238000005341 cation exchange Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 4
- 238000005345 coagulation Methods 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000010907 mechanical stirring Methods 0.000 claims description 2
- 230000009719 regenerative response Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 239000013589 supplement Substances 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 18
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 9
- 239000004005 microsphere Substances 0.000 abstract description 7
- 239000011259 mixed solution Substances 0.000 abstract description 5
- 230000001172 regenerating effect Effects 0.000 abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 3
- 239000011574 phosphorus Substances 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000004062 sedimentation Methods 0.000 abstract description 2
- 239000002957 persistent organic pollutant Substances 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- CLBRCZAHAHECKY-UHFFFAOYSA-N [Co].[Pt] Chemical compound [Co].[Pt] CLBRCZAHAHECKY-UHFFFAOYSA-N 0.000 description 4
- 238000004737 colorimetric analysis Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 230000002779 inactivation Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000001728 nano-filtration Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N 1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid Chemical compound C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 210000000697 sensory organ Anatomy 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000012609 strong anion exchange resin Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Treatment Of Water By Ion Exchange (AREA)
- Water Treatment By Sorption (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a processing method for deeply purifying urban sewage. The processing method comprises the following steps: taking urban two-stage biochemical effluent as raw water; putting the raw water into a stirring reactor containing strong alkali and weak acid mixed magnetic microsphere resins and then performing continuous dynamic adsorption; after reacting, putting a mixed solution of the mixed resins and water into a sedimentation basin; after separating the mixed resins from a water body, sending a part of the mixed resins back to the reactor and sending the remained mixed resins into a regenerating pool; sending the mixed resins after being regenerated to a resin storage tank; and meanwhile, continuously pumping the mixed solution of the mixed resins and clean water in a flowing state in proportion into the reactor from the resin storage tank, thereby realizing the dynamic absorption and regeneration of the mixed resins. The processing method can be used for efficiently removing dissolvable organic pollutants from the sewage, especially removing the dissolvable organic matters capable of generating chrominance and removing the indexes such as ammonia nitrogen, hardness, total nitrogen, total phosphorus, and the like. The sewage after being processed can be better applied to industry, landscape, entertainment, and the like. The processing method is simple in process, is low in investment and running cost and is suitable for large-scale sewage treatment.
Description
Technical field
The invention discloses a kind of city sewage deep purifying treatment method, belong to the technical field of city sewage deep treatment regeneration.
Background technology
Municipal effluent has the characteristics such as the water yield is large, complicated, advanced treatment is on the basis of biochemical treatment, to adopt physics, chemistry and biological means to further process sewage, method commonly used has coagulation clarification, filtration, sterilization and film processing etc. at present, but wherein certain is single-method all be difficult to reach the treatment effect of expection, be difficult to reduce efficiently some important water-quality guideline as COD, total phosphorus and total nitrogen etc. simultaneously.And, because the colourity of municipal effluent is mainly derived from soil ulmin, organism and the inanimate matter in water body, if in water, this type of material can not be removed well, water body also can residual certain colourity, and view and recreational water are brought to the discomfort on sense organ.And on some reuse purposes, the indexs such as the ammonia nitrogen of reuse water and hardness are also had to further requirement.Although the membrane processing method treatment effect is also better, easily produces membrane pollution problem, and clean more difficult.
Absorption is also a kind of important city sewage deep treatment technology, and the particle of sorbent material is less, and specific surface area is larger, and pollutent is also faster in the rate of diffusion in duct, and better thermodynamics and kinetics performance is arranged.But particle diameter is less, more be not easy to separate from water, hindered the large-scale application of superfine powder in water treatment.Magnetic microsphere resin is a kind of micron-sized solid macromolecule material, owing to having magnetic, so can rely on the magnetic of self to assemble, from water body, separates, or relies on externally-applied magnetic field to promote that magnetic resin separates from water body.It not only is magnetic, and also contains abundant pore structure and functional group.Because particle diameter is less, this resin has larger specific surface area, higher rate of mass transfer and better fluid transportation performance.
At first magnetic resin is applied to the drinking water deep process field, it has removal effect preferably to natural organic matter, nitric nitrogen etc. in drinking water resource, the resin that also is magnetic at present is applied to the report of waste water treatment, but the application of magnetic resin at present is a certain type magnetic resin and applies separately, has no the example that dissimilar mixed with resin is used.The mixing of strong basicity and weakly acidic resin is used has than single basic resin the effect of removing better COD and colourity, and reduce when can realize the index such as ammonia nitrogen, hardness, TN and TP, reduce facility investment and running cost, be applicable to large-scale city waste water control demand.
Summary of the invention
1. the technical problem that invention will solve
For current conventional depth treatment process, be difficult to make some important water-quality guideline to meet the problems such as emission standard and reuse requirement, the invention provides a kind of city sewage deep purifying treatment method.Utilize the combined utilization of highly basic and weak acid magnetic microsphere resin, reach the efficient effect of removing COD, colourity and ammonia nitrogen, can effectively reduce hardness, total nitrogen and total phosphorus, present method technique is simple, can be applicable in large-scale city advanced treatment of wastewater process for regenerating, recovering and reutilizing simultaneously.
2. the objective of the invention is to be achieved through the following technical solutions:
(1) municipal effluent after sewage work's secondary biochemical treatment and highly basic, weak acid magnetic microsphere hybrid resin contact reacts in can realizing liquid-solid well-mixed reactor, water flowing multiple 500-3000 is doubly;
(2) reacted hybrid resin in step (1) is entered to settling tank with water mixed liquid and separate, the hybrid resin after separation is partly refluxed to reactor, and all the other send into regenerated reactor, supplements hybrid resin simultaneously continuously from the resin storage tank to reactor; Supplementary amount of resin is consistent with the amount of resin that enters regenerated reactor;
(3) in regenerated reactor, resin is regenerated, the clear liquid of the regenerated liquid after inefficacy after coagulation or film are processed can be used for preparing in addition recycle of regenerator, and the hybrid resin of having regenerated deposits the resin storage tank in.
The described magnetic resin of above-mentioned steps (1) includes but not limited to the product of Nanjing University, the development of Australian ORICA company.The preferred magnetic styrene of highly basic magnetic microsphere resin or acrylic acid series strongly basic anion exchange microballoon resin, the preferred weak acid cation exchange microballoon resin of magnetic acrylic acid series of weak acid resin.Wherein magnetic styrene alkali anion exchange microsphere resin is determined resin in the national inventing patent application 200910264445.X of Nanjing University, magnetic acrylic acid series strongly basic anion exchange microballoon resin is Nanjing University's national inventing patent application 201010017687.1 determined resins, and weak acid cation exchange microballoon resin of magnetic acrylic acid series is Nanjing University's national inventing patent application 201010500161.9 determined resins.
The volume ratio that strong alkali resin in step (1) and weak acid resin add is 1:1-8:1.Sewage is 10～60min at the hydraulic detention time of hybrid resin reactor, and liquid-solid abundant mixing comprises mechanical stirring, strength stirring or hydraulic mixing and allly realizes liquid-solid mixed uniformly mode.The described regenerator of step (3) is that inorganic salt are main compound desorbing agent, and Inorganic salt is 5% to saturation concentration, and the regenerative response time is no less than 30min, and the resin after regeneration is sent into the resin storage tank.
3. beneficial effect
The present invention compares with the conventional depth treatment process, and technique is simple, and investment running cost is low, easy to operate, and treatment effect is good.Compare with other magnetic resin techniques, can in a set of equipment, efficiently remove dissimilar organism and inorganics impurity in sewage simultaneously, the sewage after processing can meet purposes such as being back to view, amusement, circulating cooling water of power plant, nourishment source water.
embodiment
Embodiment 1
Certain 100,000 tons of sewage work's secondary biochemical effluent water-quality guideline: COD ≈ 60 ~ 80 mg/L, colourity ≈ 55 ~ 65 degree (platinum cobalt colorimetry), NH
3-N ≈ 15 ~ 20 mg/L.With 15m
3the flow of/h evenly flows into 10m
3in upflowing strength stirred reactor, add in advance the hybrid resin that volume ratio is 1:1 in reactor, be 20L magnetic acrylic acid series strongly basic anion exchange microballoon resin (visible patent application 201010017687.1 contents of the performance of this resin and preparation method, Nanjing University's development, lower same) and 20L weak acid cation exchange microballoon resin of magnetic acrylic acid series (visible patent application 201010500161.9 contents of the performance of this resin and preparation method, Nanjing University's development, lower same), after hybrid resin completes in reactor with water and reacts, flow into inclined-plate clarifying basin from reactor top water outlet crest of weir, relying on resin self magnetic to assemble realizes separating of hybrid resin and water, but settling tank top water outlet direct reuse, the hybrid resin of bottom settlings and water mixed liquid enter surge tank with the flow of 40L/h, 80% blowback reactor wherein, all the other 20% send into regenerating tank.Hybrid resin after inactivation, after 10% sodium-chlor+0.1% hydrochloric acid soln regeneration 30min, is sent into resin storage tank, simultaneously from resin storage tank with the flow of 8L/h to the mixed solution that pumps into hybrid resin and clear water in reactor.Regenerated liquid after inefficacy clear liquid after nanofiltration is processed is used for preparing regenerator.Effluent quality: the COD clearance is about 70%, and chroma removal rate is about 90%, and ammonia nitrogen removal frank is about more than 75%, nitrogen removal rate approximately 25%, total tp removal rate approximately 30%, hardness clearance approximately 67%.
Embodiment 2
Certain 50,000 tons of sewage work's secondary biochemical effluent water-quality guideline: COD ≈ 60 ~ 70 mg/L, colourity ≈ 50 ~ 55 degree (platinum cobalt colorimetry), NH
3-N ≈ 10 ~ 12 mg/L.With 1m
3the flow of/h evenly flows into 0.5m
3in the steel mechanically stirred reactor, add in advance the hybrid resin that volume ratio is 2:1 in reactor, it is 1L magnetic styrene alkali anion exchange microsphere resin (the visible patent application 200910264445.X of the performance of this resin and preparation method content, Nanjing University's development, lower same) and the 0.5L weak acid cation exchange microballoon resin of magnetic acrylic acid series, after hybrid resin has reacted in reactor with water, in flowing to inclined-plate clarifying basin, relying on resin self magnetic to assemble realizes separating of resin and water, but settling tank top water outlet direct reuse, the hybrid resin of bottom settlings and water mixed liquid enter surge tank with the flow of 5L/h, 60% blowback reactor wherein, all the other 40% send into regenerating tank.Hybrid resin after inactivation, after saturated sodium-chloride+0.1% hydrochloric acid soln regeneration 40min, is sent into resin storage tank, simultaneously from resin storage tank with the flow of 2L/h to the mixed solution that pumps into hybrid resin and clear water in reactor.Regenerated liquid after inefficacy clear liquid after nanofiltration is processed is used for preparing regenerator.Effluent quality: the COD clearance is about 62%, and chroma removal rate is about 80%, and ammonia nitrogen removal frank is about 60%, nitrogen removal rate approximately 22%, total tp removal rate approximately 25%, hardness clearance approximately 54%.
Embodiment 3
Certain 300,000 tons of sewage work's secondary biochemical effluent: COD ≈ 40 ~ 50 mg/L, colourity ≈ 55 ~ 60 degree (platinum cobalt colorimetry), NH
3-N ≈ 1 ~ 1.5mg/L, TN ≈ 15 ~ 20mg/L, TP ≈ 2 ~ 3mg/L, hardness ≈ 2.5 ~ 3mmol/L.With 0.5m
3the flow of/h evenly flows into 0.5m
3in the steel mechanically stirred reactor, add in advance the hybrid resin that volume ratio is 5:1 in reactor, be 1.5L magnetic acrylic acid series strongly basic anion exchange microballoon resin and 0.3L weak acid cation exchange microballoon resin of magnetic acrylic acid series, after hybrid resin has reacted in reactor with water, in flowing to inclined-plate clarifying basin, relying on resin self magnetic to assemble realizes separating of resin and water, but settling tank top water outlet direct reuse, the hybrid resin of bottom settlings and water mixed liquid enter surge tank with the flow of 2L/h, 85% blowback reactor wherein, all the other 15% send into regenerating tank.Hybrid resin after inactivation, after 5% sodium-chlor+0.1% hydrochloric acid soln regeneration 50min, is sent into resin storage tank, simultaneously from resin storage tank with the flow of 0.3L/h to the mixed solution that pumps into hybrid resin and clear water in reactor.Regenerated liquid after inefficacy clear liquid after poly-aluminium coagulating treatment is used for preparing regenerator.Effluent quality: the COD clearance is about 72%, and chroma removal rate is about 93%, and ammonia nitrogen removal frank is about 67%, nitrogen removal rate approximately 31%, total tp removal rate approximately 39%, hardness clearance approximately 63%.
Embodiment 4
Certain 200,000 tons of sewage work's secondary biochemical effluent, after the coagulating sedimentation filter-sterilized, water-quality guideline: colourity ≈ 35 ~ 45 degree (platinum cobalt colorimetry), COD=30 ~ 35 mg/L, other indexs meet sewage discharge one-level A standard.Get 1L sewage and put into beaker, add the mictomagnetism resin that the 4mL volume ratio is 8:1 (magnetic styrene is strong anion-exchange resin and magnetic acrylic acid series weakly acidic cationic exchanger resin), after stirring reaction 10-60min, take out the sewage after processing, again pouring 1L sewage into is reacted again, after repeating ten times, measure the mean value of water, the COD clearance is about 41%, chroma removal rate is about 72%, and ammonia nitrogen removal frank is about 27%, nitrogen removal rate approximately 29%, total tp removal rate approximately 37%, hardness clearance approximately 47%.
Embodiment 5
Change the strong alkali resin in embodiment 4 into the Australian ORICA product MIEX of company (Cl) magnetic powder resin, all the other conditions are identical, water outlet COD clearance approximately 30%, chroma removal rate is about 67%, clearance approximately 50%, nitrogen removal rate approximately 24%, total tp removal rate approximately 30%, ammonia nitrogen and hardness clearance are substantially with embodiment 4.
Claims (3)
1. a city sewage deep purifying treatment method is characterized in that it comprises the following steps:
(1) municipal effluent after sewage work's secondary biochemical treatment and highly basic, weak acid mictomagnetism microballoon resin contact reacts in can realizing liquid-solid well-mixed reactor, water flowing multiple 500-3000 doubly, wherein strong alkali resin is magnetic styrene system or acrylic acid series strongly basic anion exchange microballoon resin, weak acid resin is weak acid cation exchange microballoon resin of magnetic acrylic acid series, and the volume ratio that strong alkali resin and weak acid resin add is 1:1-8:1;
(2) reacted hybrid resin in step (1) is entered to settling tank with water mixed liquid and separate, the hybrid resin after separation is partly refluxed to reactor, and all the other send into regenerated reactor, supplements hybrid resin simultaneously continuously from the resin storage tank to reactor; Supplementary amount of resin is consistent with the amount of resin that enters regenerated reactor;
(3) in regenerated reactor, resin is regenerated, the clear liquid of the regenerated liquid after inefficacy after coagulation or film are processed can be used for preparing in addition recycle of regenerator, and the hybrid resin of having regenerated deposits the resin storage tank in.
2. according to a kind of city sewage deep purifying treatment method described in claim 1, it is characterized in that the waste water described in step (1) is 10～60min at the hydraulic detention time of hybrid resin reactor, liquid-solid abundant mixing comprises mechanical stirring, strength stirring or hydraulic mixing and allly realizes liquid-solid mixed uniformly mode.
3. according to a kind of city sewage deep purifying treatment method described in claim 1, it is characterized in that the described regenerator of step (3) is that inorganic salt are main compound desorbing agent, Inorganic salt is 5% to saturation concentration, the regenerative response time is no less than 30min, and the resin after regeneration is sent into the resin storage tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110291938.XA CN102381742B (en) | 2011-09-30 | 2011-09-30 | Processing method for deeply purifying urban sewage |
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| CN201110291938.XA CN102381742B (en) | 2011-09-30 | 2011-09-30 | Processing method for deeply purifying urban sewage |
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| CN102381742B true CN102381742B (en) | 2013-05-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU2013204708B2 (en) * | 2012-05-25 | 2016-11-03 | Ixom Operations Pty Ltd | Water Treatment Process |
| CN103497281B (en) * | 2013-07-31 | 2016-04-06 | 南京大学 | A kind of weak acid modifies the method for high-specific surface area magnetic resin, its preparation method and high-efficient purification micropollutant water thereof |
| CN104261596A (en) * | 2014-10-23 | 2015-01-07 | 湖北君集水处理有限公司 | Method for removing nitrate nitrogen from effluents of sewage plant with resin and method for treating resin regenerating liquid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101746930A (en) * | 2009-12-25 | 2010-06-23 | 南京中电联环保股份有限公司 | Advanced treatment method for pesticide industrial wastewater |
| CN101905931A (en) * | 2010-02-11 | 2010-12-08 | 南京大学 | Advanced treating method of biochemical tail water based on magnetic resin |
| CN101948554A (en) * | 2010-10-09 | 2011-01-19 | 南京大学 | Weak acid cation exchange microballoon resin of magnetic acrylic acid series and synthesis method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101746930A (en) * | 2009-12-25 | 2010-06-23 | 南京中电联环保股份有限公司 | Advanced treatment method for pesticide industrial wastewater |
| CN101905931A (en) * | 2010-02-11 | 2010-12-08 | 南京大学 | Advanced treating method of biochemical tail water based on magnetic resin |
| CN101948554A (en) * | 2010-10-09 | 2011-01-19 | 南京大学 | Weak acid cation exchange microballoon resin of magnetic acrylic acid series and synthesis method thereof |
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