CN1843963A - Hollow fiber ultrafiltration membrane enhanced ultrafiltration and foam air flotation method for treating cadmium-containing wastewater - Google Patents
Hollow fiber ultrafiltration membrane enhanced ultrafiltration and foam air flotation method for treating cadmium-containing wastewater Download PDFInfo
- Publication number
- CN1843963A CN1843963A CN 200610031599 CN200610031599A CN1843963A CN 1843963 A CN1843963 A CN 1843963A CN 200610031599 CN200610031599 CN 200610031599 CN 200610031599 A CN200610031599 A CN 200610031599A CN 1843963 A CN1843963 A CN 1843963A
- Authority
- CN
- China
- Prior art keywords
- cadmium
- air flotation
- air
- flotation column
- foam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
一种中空纤维超滤膜强化超滤和泡沫气浮处理含镉废水的方法，工艺步骤为：1)将阴离子表面活性剂十二烷基硫酸钠加入到含镉废水中，搅拌均匀静置反应，由蠕动泵送至超滤膜组件过滤流入气浮柱；2)通过空气压缩机从气浮柱底端曝气头鼓入空气，将步骤1所产生的超滤后的出水从气浮柱中部流入，利用阴离子表面活性剂十二烷基硫酸钠自身具有的表面活性剂起泡的性质，使残留的十二烷基硫酸钠形成有吸附功能的气泡，吸附水中残留的低浓度镉离子；3)由步骤2所产生的携带镉离子的气泡上浮，从气浮柱的顶端泡沫出口流出，水从气浮柱底部出口达标排出。本发明具有去除效果好、能耗低、操作简单、表面活性剂用量少、成本低等优点。A method for treating cadmium-containing wastewater with hollow fiber ultrafiltration membrane enhanced ultrafiltration and foam air flotation, the process steps are: 1) adding anionic surfactant sodium lauryl sulfate to cadmium-containing wastewater, stirring evenly and standing for reaction , sent to the ultrafiltration membrane module by peristaltic pump to filter and flow into the air flotation column; 2) air is blown into the aeration head from the bottom of the air flotation column through the air compressor, and the ultrafiltered effluent produced in step 1 is discharged from the air flotation column Inflow in the middle, using the foaming properties of the anionic surfactant sodium lauryl sulfate itself to make the residual sodium lauryl sulfate form bubbles with adsorption function, and absorb the residual low-concentration cadmium ions in the water; 3) The bubbles carrying cadmium ions generated in step 2 float up and flow out from the foam outlet at the top of the air flotation column, and the water is discharged from the outlet at the bottom of the air flotation column up to the standard. The invention has the advantages of good removal effect, low energy consumption, simple operation, less surfactant consumption, low cost and the like.
Description
Technical field
The invention belongs to the membrane processing method of heavy metal wastewater thereby, be specifically related to a kind of method of utilizing hollow fiber ultrafiltration membrane enhancing ultrafiltration and foam air supporting to handle cadmium wastewater.
Background technology
Along with China's sustained economic growth, heavy industry scales of investment such as iron and steel, electric power, cement, electrolysis increase, and product production increases rapidly, and the heavy metal class is polluted and is on the rise.The improvement method of heavy metal wastewater thereby mainly contains chemical precipitation method, absorption method, ion exchange method, biological process, membrane separation process etc. at present.Precipitator method technology is simple, easy to operate, economical and practical, is widely used in wastewater treatment, but can't realizes the recycling of heavy metal, and the stacking of sediment also may cause secondary pollution.Multiple controlling factors such as the composition of the kind of absorption method processing heavy metal wastewater thereby sorbent suspension, the addition of sorbent material, waste water, the concentration of waste water, pH value, adsorption time, the actually operating difficulty is bigger, and selectivity is not high.Ion exchange method is handled heavy metal wastewater thereby, and the degree of purification height can reclaim, non-secondary pollution, but the actual treatment cost is very high.Biological process is to be solved because have many problems to have in the technology, and its application is not extensive, and the resistance to overload shock performance is not high.The mode that membrane separation process is handled heavy metal wastewater thereby mainly contains electroosmose process, reverse osmosis method, nano filtering process etc., has the pollutants removal rate height, can reclaim the heavy metallic salt in the waste water, the simply outstanding advantage of technology, but because the cost of electrodialytic membranes, reverse osmosis membrane, nanofiltration membrane itself is higher, action required pressure is bigger, causes investment, the running cost of embrane method processing heavy metal wastewater thereby higher, has influenced its application in the large-scale industry wastewater treatment.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, provides that a kind of removal effect is good, energy consumption is low, simple to operate, dosage of surfactant is few, cost is low cadmium wastewater treatment process.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the method for cadmium wastewater is handled in hollow fiber ultrafiltration membrane enhancing ultrafiltration of the present invention and foam air supporting, its processing step is: 1) anionic (SDS) is joined in the cadmium wastewater, standing and reacting stirs, delivering to hyperfiltration membrane assembly by peristaltic pump filters, hold back and adsorbed the tensio-active agent of cadmium ion in the water, water and low quantity of surfactant and the cadmium ion that is not adsorbed see through film and flow into air-flotation column; 2) blast air by air compressor from air-flotation column bottom aeration head, water outlet after the ultrafiltration that step 1 produced is flowed into from the air-flotation column middle part, the blistered character of the tensio-active agent that utilizes anionic self to have, make residual sodium lauryl sulphate be formed with the bubble of adsorption function, by lower concentration cadmium ion residual in the adsorption planar water; 3) by the bubble floating that carries cadmium ion that step 2 produced, flow out from the top foam outlet of air-flotation column, water is discharged from the air-flotation column outlet at bottom, and wherein concentration of cadmium ions reaches " integrated wastewater discharge standard " and (GB8978-96) requires (less than 0.1mg/L).
(1) concentration of cadmium ions is 5～50mg/L in the step 1,2,3; (2) the SDS addition is 3.00～9.37 * 10
-3Mol/L; (3) membrane operations force value 0.03Mpa～0.09Mpa; (4) standing and reacting time 0.5～10h; (5) foam air supporting air flow quantity is 60～140L/h; (6) wastewater flow is 1～8L/h; (7) the foam residence time is 2～20min; (8) aeration head aperture 10 μ m～100 μ m.
Described ultra-filtration membrane is polysulfones or polyethersulfone.
Advantage of the present invention or positively effect:
1, removal effect is good, and water outlet can direct discharging up to standard.The concentration of cadmium ion is less than 0.1mg/L in hollow fiber ultrafiltration membrane enhancing ultrafiltration and the foam air supporting water outlet, and the clearance of cadmium ion is greater than 99.80%.
2, low, the no phase transformation of energy consumption.SDS micelle and cadmium ion adhere to and ultra-filtration and separation, foam dissolved air flotation process all do not have phase transformation, energy consumption is low.
3,, improved the clearance of enhancing ultrafiltration processing cadmium ion by increasing foam air supporting treating processes to the ultrafiltration water outlet.
4, reduced the usage quantity of anion surfactant SDS.Because the cadmium ion clearance improves, make anion surfactant SDS usage quantity reduce, reduced cost, also reduced the content of anion surfactant SDS in the water outlet.
Embodiment
Embodiment 1: when measuring to such an extent that concentration of cadmium ions is 50mg/L in the waste water, add 6.25 * 10
-3The SDS of mol/L, stir, standing and reacting time 2h, deliver to polysulfone hollow fiber ultrafiltration membrane system by peristaltic pump and filter, the ultra-filtration membrane water outlet flows into air-flotation column, blasts air by air compressor from air-flotation column bottom aeration head, carry the bubble floating of cadmium ion, flow out from the top foam outlet of air-flotation column, water is discharged from the air-flotation column outlet at bottom, and wherein concentration of cadmium ions reaches " integrated wastewater discharge standard " (GB8978-96) requirement.The ultra-filtration membrane material is a polyethersulfone, and this retaining molecular weight is 6000～10000Dalton, and membrane operations pressure 0.07Mpa, wastewater flow are 5L/s, air-flotation column aeration head aperture 20 μ m, and air flow quantity is 100L/h, foam stops 15min.By the concentration of cadmium ion in the water outlet of atomic absorption spectrophotometer mensuration air-flotation column, measurement result sees Table 1.
Table 1 utilizes hollow fiber ultrafiltration membrane enhancing ultrafiltration and foam air supporting to handle cadmium wastewater (SDS addition 6.25 * 10
-3Mol/L)
| Water inlet cadmium ion starting point concentration | 50mg/L |
| Concentration of cadmium ions in the water outlet | 0.082mg/L |
| The clearance of cadmium ion | 99.84％ |
| SDS concentration in the water outlet | 2.26×10 -3mol/L |
Embodiment 2: when measuring to such an extent that concentration of cadmium ions is 50mg/L in the waste water, add 3 * 10
-3The SDS of mol/L, stir, standing and reacting time 2h, deliver to polysulfone hollow fiber ultrafiltration membrane system by peristaltic pump and filter, the ultra-filtration membrane water outlet flows into air-flotation column, blasts air by air compressor from air-flotation column bottom aeration head, carry the bubble floating of cadmium ion, flow out from the top foam outlet of air-flotation column, water is discharged from the air-flotation column outlet at bottom, and wherein concentration of cadmium ions reaches " integrated wastewater discharge standard " (GB8978-96) requirement.The ultra-filtration membrane material is a polyethersulfone, and this retaining molecular weight is 6000～10000Dalton, and membrane operations pressure 0.07Mpa, wastewater flow are 5L/s, air-flotation column aeration head aperture 20 μ m, and air flow quantity is 60L/h, foam stops 15min.By the concentration of cadmium ion in the water outlet of atomic absorption spectrophotometer mensuration air-flotation column, measurement result sees Table 2.
Table 2 utilizes hollow fiber ultrafiltration membrane enhancing ultrafiltration and foam air supporting to handle cadmium wastewater (SDS addition 3 * 10
-3Mol/L)
| Water inlet cadmium ion starting point concentration | 50mg/L |
| Concentration of cadmium ions in the water outlet | 0.099mg/L |
| The clearance of cadmium ion | 99.80％ |
| SDS concentration in the water outlet | 1.27×10 -3mol/L |
The tensio-active agent foaming property that utilizes SDS remaining in the ultrafiltration water outlet self to have in the technology of cadmium ion method in the removal heavy metal wastewater thereby that the present invention relates to, realize foam air supporting by air-blowing, make residual SDS form bubble, adsorption by bubble carries away lower concentration cadmium ion residual in the waste water, thereby make SDS and cadmium ion advanced treatment in the waste water, strengthened clearance cadmium ion in the cadmium wastewater.The contrast experiment is as follows:
The contrast experiment 1: when measuring to such an extent that concentration of cadmium ions is 50mg/L in the waste water, add 3 * 10
-3The SDS of mol/L, stir, standing and reacting time 2h, delivering to polysulfone hollow fiber ultrafiltration membrane system by peristaltic pump filters, membrane operations pressure 0.07Mpa, the ultra-filtration membrane material is a polyethersulfone, this retaining molecular weight is 6000～10000Dalton, determine the concentration of residual cadmium ion in the water after the filtration by atomic absorption spectrophotometer, measurement result sees Table 3.
Table 3 utilizes hollow fiber ultrafiltration membrane uf processing cadmium wastewater (SDS addition 3 * 10
-3Mol/L)
| Water inlet cadmium ion starting point concentration | 50mg/L |
| Concentration of cadmium ions in the water outlet | 18mg/L |
| The clearance of cadmium ion | 64％ |
| SDS concentration in the water outlet | 2.08×10 -3mol/L |
When SDS consumption and embodiment 2 are identical (3 * 10
-3Mol/L), if only adopt the hollow fiber ultrafiltration membrane ultrafiltration, concentration of cadmium ions 18mg/L in the ultra-filtration membrane water outlet then, the concentration of SDS is 2.08 * 10 in the ultra-filtration membrane water outlet
-3Mol/L; After increasing foam air supporting process, concentration of cadmium ions is 0.099mg/L in the ultra-filtration membrane water outlet, and the concentration of SDS is 1.27 * 10 in the ultra-filtration membrane water outlet
-3Mol/L, cadmium ion clearance is up to 99.80%; As seen when anion surfactant SDS consumption is identical, increased foam air supporting process after, not only cadmium ion place to go rate significantly improves, and makes that SDS concentration also significantly reduces in the water outlet.
The contrast experiment 2: when measuring to such an extent that concentration of cadmium ions is 50mg/L in the waste water, add 6.25 * 10
-3The SDS of mol/L, stir, standing and reacting time 2h, delivering to polysulfone hollow fiber ultrafiltration membrane system by peristaltic pump filters, membrane operations pressure 0.07Mpa, the ultra-filtration membrane material is a polyethersulfone, this retaining molecular weight is 6000～10000Dalton, determine the concentration of residual cadmium ion in the water after the filtration by atomic absorption spectrophotometer, measurement result sees Table 4.
Table 4 utilizes hollow fiber ultrafiltration membrane uf processing cadmium wastewater (SDS addition 6.25 * 10
-3Mol/L)
| Water inlet cadmium ion starting point concentration | 50mg/L |
| Concentration of cadmium ions in the water outlet | 2.026mg/L |
| The clearance of cadmium ion | 95.95％ |
| SDS concentration in the water outlet | 4.23×10 -3mol/L |
After having increased foam air supporting process, need be 3 * 10 only with concentration
-3The anion surfactant SDS solution of mol/L just can make the cadmium ion clearance reach 99.80%, and the concentration of anion surfactant SDS is 1.27 * 10 in the water outlet
-3Mol/L; And if do not have foam air supporting process, only utilize hollow fiber ultrafiltration membrane uf processing cadmium wastewater, even then the concentration of anion surfactant is 6.25 * 10
-3Mol/L, the cadmium ion clearance also can only reach 95.95%, and the concentration of anion surfactant SDS is 4.23 * 10 in the water outlet
-3Mol/L; As seen after having increased foam air supporting process, the usage quantity of anion surfactant has obviously reduced, and the content of anion surfactant has also reduced in the water outlet.
The method of utilizing hollow fiber ultrafiltration membrane enhancing ultrafiltration and foam air supporting to handle cadmium wastewater obviously reduces the consumption of anion surfactant SDS in the enhancing ultrafiltration process, improves the cadmium ion clearance, reduces SDS concentration in the water outlet.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100315990A CN100378007C (en) | 2006-04-30 | 2006-04-30 | Hollow fiber ultrafiltration membrane enhanced ultrafiltration and foam air flotation method for treating cadmium-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100315990A CN100378007C (en) | 2006-04-30 | 2006-04-30 | Hollow fiber ultrafiltration membrane enhanced ultrafiltration and foam air flotation method for treating cadmium-containing wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1843963A true CN1843963A (en) | 2006-10-11 |
| CN100378007C CN100378007C (en) | 2008-04-02 |
Family
ID=37062933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100315990A Expired - Fee Related CN100378007C (en) | 2006-04-30 | 2006-04-30 | Hollow fiber ultrafiltration membrane enhanced ultrafiltration and foam air flotation method for treating cadmium-containing wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100378007C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583686A (en) * | 2012-02-16 | 2012-07-18 | 福建师范大学 | Device for treating wastewater containing low-concentration metals |
| CN103539295A (en) * | 2013-10-30 | 2014-01-29 | 北京清大国华环保科技有限公司 | Method and device for deeply treating heavy metal wastewater |
| CN109081393A (en) * | 2018-08-27 | 2018-12-25 | 北京中晟清源环保科技有限公司 | A kind of new-type air-floatation auxiliary agent and preparation method |
| WO2019010835A1 (en) * | 2017-07-14 | 2019-01-17 | 山东大学 | Method for completely removing heavy metal ions in battery plant wastewater by using water-based foam system |
| CN109809518A (en) * | 2019-03-06 | 2019-05-28 | 广州大学 | A kind of device of froth flotation method processing waste water containing thallium |
| CN115504588A (en) * | 2022-09-28 | 2022-12-23 | 中钢集团武汉安全环保研究院有限公司 | Hot galvanizing finisher wastewater recycling treatment process |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH082439B2 (en) * | 1990-06-13 | 1996-01-17 | 日立造船株式会社 | Wastewater treatment equipment |
| RU2039709C1 (en) * | 1993-10-06 | 1995-07-20 | Тамбовское акционерное общество "Комсомолец" | Plant for liquid purification |
| JP4072323B2 (en) * | 2001-04-27 | 2008-04-09 | シャープ株式会社 | Method for treating gallium arsenide-containing wastewater and apparatus for treating gallium arsenide-containing wastewater |
| CN1157343C (en) * | 2001-10-15 | 2004-07-14 | 恩施土家族苗族自治州医疗卫生用品开发公司 | Process for preparing concentrated Se-contained natural mineral water |
| CN1736896A (en) * | 2005-08-10 | 2006-02-22 | 上海印钞厂 | A new type of waste water treatment agent for banknote printing gravure printing |
-
2006
- 2006-04-30 CN CNB2006100315990A patent/CN100378007C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583686A (en) * | 2012-02-16 | 2012-07-18 | 福建师范大学 | Device for treating wastewater containing low-concentration metals |
| CN103539295A (en) * | 2013-10-30 | 2014-01-29 | 北京清大国华环保科技有限公司 | Method and device for deeply treating heavy metal wastewater |
| CN103539295B (en) * | 2013-10-30 | 2018-10-30 | 北京清大国华环境股份有限公司 | A kind of method and apparatus of heavy metal wastewater thereby advanced treating |
| WO2019010835A1 (en) * | 2017-07-14 | 2019-01-17 | 山东大学 | Method for completely removing heavy metal ions in battery plant wastewater by using water-based foam system |
| CN109081393A (en) * | 2018-08-27 | 2018-12-25 | 北京中晟清源环保科技有限公司 | A kind of new-type air-floatation auxiliary agent and preparation method |
| CN109809518A (en) * | 2019-03-06 | 2019-05-28 | 广州大学 | A kind of device of froth flotation method processing waste water containing thallium |
| CN115504588A (en) * | 2022-09-28 | 2022-12-23 | 中钢集团武汉安全环保研究院有限公司 | Hot galvanizing finisher wastewater recycling treatment process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100378007C (en) | 2008-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204939131U (en) | Tube type filter membrance wastewater treatment and waste water reuse system | |
| CN103183403B (en) | Antibiotic pharmaceutical wastewater processing method and device | |
| CN202358976U (en) | Glass wastewater treatment equipment | |
| CN104609605B (en) | Device and method for realizing printing and dyeing dyed wastewater reuse and dye recovery | |
| CN111285531A (en) | Method and system for concentrating high-salinity mine water | |
| CN105174665A (en) | Treatment method for dyeing and printing effluent | |
| CN104986894B (en) | A kind of method and device of gas-liquid combination softening high rigidity waste water | |
| CN100378007C (en) | Hollow fiber ultrafiltration membrane enhanced ultrafiltration and foam air flotation method for treating cadmium-containing wastewater | |
| CN202610045U (en) | Processing system of heavy-metal-contained acid wastewater | |
| CN201971688U (en) | A system for removing silicon and oil from oily sewage | |
| CN100532299C (en) | Garbage leachate processing process and system based on membrane bioreactor-nano filtering membrane technology | |
| CN203498181U (en) | System for recycling waste acid and waste alkali | |
| CN201433151Y (en) | A device for treating slightly polluted surface water | |
| CN203955038U (en) | A kind of preparation system of automobile-used urea | |
| CN103435015B (en) | Technology and device for extracting sulfuric acid (H2SO4) from acidic mine water | |
| CN102674630B (en) | Steel rolling wastewater treatment method | |
| CN101696049A (en) | Enhancing ultrafiltration treatment method of compound wastewater containing cadmium and methylene blue by surfactant | |
| CN111233208A (en) | A desulfurization wastewater recycling system | |
| CN100497194C (en) | Method for treating cadmium-containing waste water by utilizing surface active agent | |
| CN108545871A (en) | A kind of circuit-board industry chemical nickel waste water treatment system and its processing method | |
| CN215886607U (en) | Low-cost resourceful coprocessing system of negative hardness waste water | |
| CN210796097U (en) | Container formula landfill leachate processing system | |
| CN200988816Y (en) | Garbage percolating liquid treating system based on film biological reactor-filter film technology | |
| CN210736443U (en) | Industrial wastewater recycling zero discharge system | |
| CN204897577U (en) | Mix to congeal and handle and membrane separation combination effluent disposal system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080402 Termination date: 20110430 |