CN102701481A - Ozone-active carbon-nanofiltration membrane water purification treatment process - Google Patents
Ozone-active carbon-nanofiltration membrane water purification treatment process Download PDFInfo
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- CN102701481A CN102701481A CN2012101969812A CN201210196981A CN102701481A CN 102701481 A CN102701481 A CN 102701481A CN 2012101969812 A CN2012101969812 A CN 2012101969812A CN 201210196981 A CN201210196981 A CN 201210196981A CN 102701481 A CN102701481 A CN 102701481A
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Abstract
The invention discloses a fine drinking water treatment process, particularly relates to an 'ozone-active carbon-nanofiltration membrane' process. Raw water is treated with a pre-treatment system of ozone, active carbon and the like, a nanofiltration membrane deep treatment system, and a post-treatment system of ozone sterilization and the like, so as to obtain fine drinking water in line with national standards, and the fine drinking water is provided for users to drink. The ozone is used for oxidizing macromolecular organics in the water so as to improve the adsorption efficiency of the active carbon. The active carbon has a good effect of removing residual chlorine and CODMn (organic pollutants). The nanofiltration membrane is used for removing various substances harmful to a human body, such as turbid matters (suspension particles), the CODMn, TDS (inorganic ions), the residual chlorine and bacteria, softening the water and remaining microelements and minerals beneficial to the human body. At present, urban water bodies are severely polluted so as to endanger the drinking water safety of residents. The fine drinking water treatment process is used for deeply treating and purifying water, and the deeply treated and purified water is conveyed to residential areas, schools and public places through complete equipment and dual water supply pipelines, so that the safety problem of drinking water in the life of the residents is solved.
Description
Technical field
The present invention relates to drinking water treatment Technology field.
Background technology
Along with developing rapidly of industry; Artificial-synthetic compound's kind has reached several ten million kinds; Meanwhile contain various poisonous, harmful industrial waste water in a large number, sewage is unprocessed or only just enter natural water body through simple process, has directly or indirectly caused the pollution of drinking water source, also has non-point pollutions such as agricultural run-off, atmospheric precipitation in addition; Cause pollution of waterhead to increasingly sharpen; Wherein serious with organic contamination, the drinking-water quality problem has become the Universal Problems that the world today faces now, through epidemiological study with to the toxicologic checking of pollution substance; Find that a lot of materials and resident's sickness rate have very big dependency, thereby caused that people are to the wholesomeness of tap water and the very big attention of security.China has done number of applications and research work at present in the drinking water deep purification field, country has issued that " direct drinking water water quality standard ", " water supply industry technical progress development program in 2000 " etc. are as the foundation of estimating drinking-water quality.
The Guangzhou is from the eighties since latter stage; Water body receives more and more serious organic contamination; The source quality index situation that detected from 1999; Situation is quite severe, and the source quality of a lot of water factories has not reached II, III drinking water source standard among the national regulation GB3838-88 " ground water environment quality standard ".Special is the water factory at water source with section, Zhujiang River Guangzhou, because pollution of waterhead is serious, many water sources are far below V class source quality standard.For solving resident living drinking-water problem, guarantee common people's drinking water hygiene and safety, the direction that supplying water in different qualities serves a town with water one-tenth to develop; But will be at big urban area unified implementation supplying water in different qualities, because construction investment is big, running cost is very high; Construction period is long, also is that far water is difficult to resolve closely yearningly.Comparatively feasible method is to adopt advanced combination technique, serves as to handle unit with medium and small suite of equipment, and the pipeline house lead in is for the sub-district provides drink water.
Adopt reverse osmosis membrane technology if direct drinking water is handled, this technology almost can be removed all materials in the water, comprises suspended substance, colloid, dissolved organic matter, inorganic salt, bacterium, mikrobe etc., has also removed the mineral substance to the human body beneficial fully.As providing high-quality healthy tap water, this technology is not advocated.
Summary of the invention
The present invention is for a kind of direct drinking water treatment process of health science is provided: " ozone---gac---nf membrane " technology.
Concrete process flow sheet is referring to Fig. 1.
Technical scheme of the present invention is: with larger molecular organics in the ozone oxidation water; Improve the charcoal adsorption efficiency; Pass through preprocessing systems such as gac (char filter), security personnel's strainer again and carry out rough handling, pass through nf membrane (NF main frame) advanced treatment system again, and the accurate filter after-treatment system; Become the direct drinking water of National standard, supply with the user through the supplying water in different qualities pipe network of special use and drink.The water of not drinking in the pipe network according to the water quality situation once more through pump around circuit behind the ultra-violet sterilization to the finished product water tank, or directly be back to intermediate water tank and handle again.
Former water generally adopts the municipal tap water.The main effect of each level assembly is following:
Main experimental data is following:
1) each processing unit to the removal effect of turbidity referring to Fig. 2.
Turbidity is a kind of sign of suspended particle in the water, and it is the sense organ shape index of tap water, and is simultaneously also significant aspect the microbial safety of water.At present, the limit value of regulation turbidity is 1NTU in China's direct drinking water water quality standard (CJ94-1999).
Can be known that by Fig. 2 the turbidity of former water is 0.5NTU, through reducing to 0.1NTU after the charcoal filter, clearance is 80%, explains that the charcoal filter is fine to the removal effect of turbidity.Further reduce to 0.03NTU through turbidity after the nanofiltration.A whole set of technology is 94% to total clearance of turbidity.Hence one can see that, though the turbidity of former water is very low, advanced purification process still has very high clearance to the surplus materials that produces turbidity in the water, explains that water quality has reached good standard fully aspect sense organ through deep purifying.
2) each technique unit water outlet is to COD
MnRemoval effect referring to Fig. 3.
Relevant research is done look-matter on-line analysis to tap water and is found, contains nearly hundred kinds of organism such as benzene and homologue thereof, phenols, acid amides, aliphatic hydrocarbon in the water, and content is small, is difficult for accomplishing the individual event detection by quantitative, therefore adopts COD
MnThis overall target is represented organic amount in the water.
Can know by Fig. 3, the organic pollutant in the water after ozone oxidation is decomposed, by charcoal absorption, COD
MnClearance very high, reach 80%.COD in the nanofiltration water outlet
MnFurther reduce, total clearance is 99%.
3) each technique unit water outlet to the removal effect of TDS referring to Fig. 4.
The TDS of tap water (total dissolved solid) is equivalent to salinity to a certain extent, and it is made up of all mineral ions in the water.General main bioelement and the negatively charged ion such as K, Ca, Mg, Na of comprising also comprise some poisonous metal element and compound.Because in pH5～9 scopes, specific conductivity and TDS content roughly are directly proportional.Therefore, through measuring the content that specific conductivity reflects total dissolved solid in the water.
Can be known that by Fig. 4 the charcoal filter does not almost have removal effect to specific conductivity, and the nanofiltration desalting effect is obvious, clearance reaches 93.8%.
4) each processing unit to the removal effect of chlorine residue referring to Fig. 5.
Contents of residual chlorine in the tap water is very high, significantly reduces through contents of residual chlorine behind the activated carbon filtration, explains that gac is obvious to the chlorine residue removal effect, helps guaranteeing the requirement of subsequent film technology water inlet to chlorine residue.Nf membrane is further removed chlorine residue, and total clearance is more than 95%.
5) each processing unit is to the removal effect of total plate count
Contents of residual chlorine in the tap water is very high, and therefore the total plate count in the former water seldom.Through behind the activated carbon dechlorination, total plate count increases.This is the cause that relies on the organism breeding to increase owing to the bacterium that is grown in activated carbon surface.Nanofiltration (NE), its molecular weight cut-off are in the scope of 80-1000, and the aperture is several nanometers, and filtering accuracy reaches the 0.001um level, and the size of smallest bacteria is about about 0.3um, so nf membrane can be held back the removal bacterium in 100% ground.
Conclusion:
Gac is to chlorine residue in the former water and COD
Mn(organic pollutant) has good effect of removing.
Nf membrane can be removed turbidity (suspended particle), COD
MnVarious harmful materials such as (organic pollutant), TDS (mineral ion), chlorine residue, bacterium carry out water demineralization, can also keep trace element and the mineral substance to the human body beneficial simultaneously.
Description of drawings
Fig. 1 is a process flow diagram of the present invention
Fig. 2 is the removal effect figure of each processing unit to turbidity
Fig. 3 is that each processing unit is to COD
MnRemoval effect figure
Fig. 4 is the removal effect figure of each processing unit to TDS
Fig. 5 is the removal effect figure of each processing unit to chlorine residue
Embodiment
The present invention is applied on the drink water suite of equipment.Some residential quarters, shopping mall and school, factory etc. in Guangzhou, our company have built high-quality water purification Provisions (abbreviation water treatment station) and corresponding supplying water in different qualities pipe network.Set up the drink water suite of equipment in the water treatment station, advanced treatment has been carried out in the municipal tap water.The technology of water treatment adopts unique technology of the present invention just: " ozone---gac---nf membrane " technology; Removal is to the deleterious material of toxic elements in human body; Particularly organic pollutant keeps human body beneficial, indispensable trace element and mineral substance simultaneously.
Through effectively regular management, the effluent quality of each water treatment station of building successively during the last ten years meets nation-building portion " direct drinking water water quality standard " requirement (CJ94-1999) fully, and is the water that belongs to high-quality, health.
Claims (4)
1. water purification treatment technology, its core technology is " ozone---gac---nf membrane " technology.
2. the invention is characterized in: utilize " ozone---gac---nf membrane " combined system, bring into play the usefulness of each assembly, can remove the organic pollutant (COD in the water effectively
Mn), turbidity (suspended particle), heavy metal and various harmful materials such as total dissolved solid (TDS), chlorine residue and bacterium, each assembly is learnt from other's strong points to offset one's weaknesses, acting in conjunction, makes last effluent quality reach national direct drinking water standard-required.
3. the invention is characterized in: adopt nf membrane as the advanced treatment core component, can also keep trace element and mineral substance when carrying out water demineralization the human body beneficial.
4. the invention is characterized in: through the water purification after " ozone---gac---nf membrane " technology advanced treatment; Supply with the user through the supplying water in different qualities pipe network of special use and drink, the water of not drinking in the pipe network arrives the finished product water tank through pump around circuit after the sterilization once more according to the water quality situation.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104860434A (en) * | 2014-02-25 | 2015-08-26 | 刘德周 | Seven modularized water purification engineering modules capable of realizing flexibly assembling |
| CN105836943A (en) * | 2016-05-25 | 2016-08-10 | 南京慧城水处理设备有限公司 | Method and equipment for removing AOC content in long-term stored water to achieve stable water quality |
| CN106587462A (en) * | 2016-12-08 | 2017-04-26 | 苏州赛斯德工程设备有限公司 | Treatment method for nanofiltration membrane central water purification system |
| CN106986483A (en) * | 2017-05-22 | 2017-07-28 | 广东益昌环境科技有限公司 | A kind of nano filtering water purifying system |
| CN113830935A (en) * | 2021-11-02 | 2021-12-24 | 南京信息工程大学 | Purification device for purifying runoff water into drinking water and use method thereof |
| CN113943076A (en) * | 2021-08-09 | 2022-01-18 | 中国电建集团华东勘测设计研究院有限公司 | Advanced treatment process and treatment equipment suitable for micro-polluted complex multi-water source water supply plant |
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| CN101066813A (en) * | 2007-05-21 | 2007-11-07 | 东华大学 | Underground water pollutant eliminating combined nanofiltering membrane process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104860434A (en) * | 2014-02-25 | 2015-08-26 | 刘德周 | Seven modularized water purification engineering modules capable of realizing flexibly assembling |
| CN105836943A (en) * | 2016-05-25 | 2016-08-10 | 南京慧城水处理设备有限公司 | Method and equipment for removing AOC content in long-term stored water to achieve stable water quality |
| CN106587462A (en) * | 2016-12-08 | 2017-04-26 | 苏州赛斯德工程设备有限公司 | Treatment method for nanofiltration membrane central water purification system |
| CN106986483A (en) * | 2017-05-22 | 2017-07-28 | 广东益昌环境科技有限公司 | A kind of nano filtering water purifying system |
| CN113943076A (en) * | 2021-08-09 | 2022-01-18 | 中国电建集团华东勘测设计研究院有限公司 | Advanced treatment process and treatment equipment suitable for micro-polluted complex multi-water source water supply plant |
| CN113830935A (en) * | 2021-11-02 | 2021-12-24 | 南京信息工程大学 | Purification device for purifying runoff water into drinking water and use method thereof |
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