CN106365367A - Multi-stage combined disinfection method for domestic drinking water - Google Patents
Multi-stage combined disinfection method for domestic drinking water Download PDFInfo
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- CN106365367A CN106365367A CN201610912056.3A CN201610912056A CN106365367A CN 106365367 A CN106365367 A CN 106365367A CN 201610912056 A CN201610912056 A CN 201610912056A CN 106365367 A CN106365367 A CN 106365367A
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- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 129
- 238000000034 method Methods 0.000 title claims abstract description 52
- 239000003651 drinking water Substances 0.000 title claims abstract description 21
- 235000020188 drinking water Nutrition 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 155
- 238000005660 chlorination reaction Methods 0.000 claims abstract description 65
- 239000006227 byproduct Substances 0.000 claims abstract description 28
- 239000005708 Sodium hypochlorite Substances 0.000 claims abstract description 21
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims abstract description 21
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000009826 distribution Methods 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 229910052801 chlorine Inorganic materials 0.000 claims description 45
- 239000000460 chlorine Substances 0.000 claims description 45
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 44
- 230000001954 sterilising effect Effects 0.000 claims description 34
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 25
- JXTHNDFMNIQAHM-UHFFFAOYSA-N dichloroacetic acid Chemical compound OC(=O)C(Cl)Cl JXTHNDFMNIQAHM-UHFFFAOYSA-N 0.000 claims description 18
- 238000002834 transmittance Methods 0.000 claims description 11
- 229960005215 dichloroacetic acid Drugs 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 9
- YNJBWRMUSHSURL-UHFFFAOYSA-N trichloroacetic acid Chemical compound OC(=O)C(Cl)(Cl)Cl YNJBWRMUSHSURL-UHFFFAOYSA-N 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 241000223935 Cryptosporidium Species 0.000 claims description 4
- 241000224467 Giardia intestinalis Species 0.000 claims description 4
- 239000000645 desinfectant Substances 0.000 claims description 4
- 229940085435 giardia lamblia Drugs 0.000 claims description 4
- 229910052736 halogen Inorganic materials 0.000 claims description 4
- 150000002367 halogens Chemical class 0.000 claims description 4
- 231100000614 poison Toxicity 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000002574 poison Substances 0.000 claims description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical class ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 2
- 241000607142 Salmonella Species 0.000 claims 1
- 210000002429 large intestine Anatomy 0.000 claims 1
- 231100000331 toxic Toxicity 0.000 claims 1
- 230000002588 toxic effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 9
- 238000000746 purification Methods 0.000 abstract 3
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 239000008399 tap water Substances 0.000 abstract 1
- 235000020679 tap water Nutrition 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 12
- 230000000844 anti-bacterial effect Effects 0.000 description 10
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000004155 Chlorine dioxide Substances 0.000 description 4
- 230000000711 cancerogenic effect Effects 0.000 description 4
- 231100000315 carcinogenic Toxicity 0.000 description 4
- 235000019398 chlorine dioxide Nutrition 0.000 description 4
- 238000011020 pilot scale process Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 241000700605 Viruses Species 0.000 description 3
- 239000013068 control sample Substances 0.000 description 3
- 230000000415 inactivating effect Effects 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- QDHHCQZDFGDHMP-UHFFFAOYSA-N Chloramine Chemical class ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 description 2
- 241000588722 Escherichia Species 0.000 description 2
- 208000031320 Teratogenesis Diseases 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 2
- 230000000249 desinfective effect Effects 0.000 description 2
- 230000000968 intestinal effect Effects 0.000 description 2
- 231100000219 mutagenic Toxicity 0.000 description 2
- 230000003505 mutagenic effect Effects 0.000 description 2
- 244000052769 pathogen Species 0.000 description 2
- 230000001717 pathogenic effect Effects 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- GHXZTYHSJHQHIJ-UHFFFAOYSA-N Chlorhexidine Chemical compound C=1C=C(Cl)C=CC=1NC(N)=NC(N)=NCCCCCCN=C(N)N=C(N)NC1=CC=C(Cl)C=C1 GHXZTYHSJHQHIJ-UHFFFAOYSA-N 0.000 description 1
- BIYAEADBDITZGK-UHFFFAOYSA-N ClN.O=Cl=O Chemical class ClN.O=Cl=O BIYAEADBDITZGK-UHFFFAOYSA-N 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000000721 bacterilogical effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229960003260 chlorhexidine Drugs 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 125000003963 dichloro group Chemical group Cl* 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- KQPBSBAEBKRAAU-UHFFFAOYSA-N hypochlorous acid;sodium Chemical compound [Na].ClO KQPBSBAEBKRAAU-UHFFFAOYSA-N 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- FDRCDNZGSXJAFP-UHFFFAOYSA-M sodium chloroacetate Chemical compound [Na+].[O-]C(=O)CCl FDRCDNZGSXJAFP-UHFFFAOYSA-M 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000003612 virological effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/29—Chlorine compounds
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to a multi-stage combined disinfection method for domestic drinking water. The multi-stage disinfection method is characterized in that a tap water purification plant comprising a V-shaped filter basin, a clear water basin, a suction well and a water distribution pump house is included, and the multi-stage disinfection method of combining ultraviolet light disinfection with two-point chlorination disinfection is adopted after water flows out of the production filter basin of the water purification plant. The method comprises the following specific steps that an ultraviolet light disinfection room is arranged at the water outlet end of the V-shaped filter basin of the water purification plant and conducts ultraviolet light disinfection on filtered water entering the ultraviolet light disinfection room; liquid chlorine or sodium hypochlorite is added into ultraviolet light disinfection effluent at a main process pipe in front of the clear water basin for first-point chlorination disinfection; liquid chlorine or sodium hypochlorite is added in the water distribution pump house and the suction well for second-point chlorination disinfection. The method has the advantages that by organically combining ultraviolet light disinfection with two-point chlorination disinfection, not only can the effects and advantages of ultraviolet light disinfection be fully exerted, but also the continuous disinfection effect of liquid chlorine or sodium hypochlorite can be exerted, production of chlorine-disinfected byproducts is reduced, and ultraviolet light disinfection and two-point chlorination disinfection are combined to achieve a synergistic disinfection effect.
Description
Technical field
The invention belongs to the field that Drinking Water is processed, the multi-stage combination sterilization side of more particularly, to a kind of Drinking Water
Method.
Background technology
Drinking Water sterilization refer to kill water in pathogen, viral and other invasive organism.Sterilization method is big
Physical method and chemical method two class can be divided on body.The predominantly organic tool of physical method filters, heats, freezing, radiating, micro- electricity
Solution, ultraviolet and microwave sterilization etc.；Chemical method mainly have chlorine, chlorine dioxide, ozone, chloramines, halogen, metal ion, cloudy from
Sub- surfactant and other antibacterial etc..
Since earlier 1900s, chlorination is just widely used in water sterilizing technology, and at present, chlorination is still most widely used
Chemical disinfection method.Its major advantage has: when the process water yield is larger, the processing cost of unit of water body is relatively low；Water body chlorination
After can keep a number of chlorine residue for a long time, thus having continuous disinfection ability；Chlorination history is longer, greater experience,
It is a kind of sterilization method of comparative maturity.
It has been found that traditional chlorination can produce teratogenesis, carcinogenic, mutagenic sterilization by-product after 20 century 70s
Thing, such as haloform, halogen acetic acid etc..And disinfection by ultraviolet light rule has the stink not adding chemical agent, not increasing water, does not produce
Raw poisonous and hazardous by-product, the advantages of being easy to operational management and realize automatization, has been obtained for getting more and more over nearly 20 years
Accreditation.Its major advantage has: can reliability and efficiently control ultraviolet light dosage automatically；Sterilization speed is fast, and the time of staying is short,
It is not required to build larger contact chamber, reduce land used；Dangerous little, as carcinogenic in haloform etc., cause genetic distortion will not be produced
By-product；It is not required to add chemical agent, do not have the danger transporting and storing chemicalses；Equipment operation is simply it is easy to manage simultaneously
The needs meeting water factory's dilatation are constantly upgraded.Its major defect has: ultraviolet sterilization is not provided that remaining disinfecting power, when
Process after water leaves reactor, the dna that the microorganism that some are killed by ultraviolet can repair damage under photoreactivation mechanism divides
Son, makes bacteriological aftergrowth；Cost of equipment is high, and running cost is high；For the water that suspended solid is a lot, water quality is poor.Because suspended solid
Microorganism can be protected makes it exempt from injury, and therefore Disinfection Effect cannot be guaranteed.
With social development, traditional disinfection way faces new severe challenge: 1. chlorination can produce to have and cause to dash forward
Become and carcinogenic disinfection byproduct (DBP)；2. there is chlorine resistance pathogenic microorganism in drinking water, such as Cryptosporidium, giardia lamblia stiles and bird
The pathogen such as type mycobacteria；3. there is very big transport, storage and application risk during chlorination.This promotes people
Abandon single free chlorination mode and take other safer water sterilization technology.Ultraviolet Disinfection sterilizes because of it
Efficiency high, safe and reliable to operation, the features such as do not produce disinfection byproduct (DBP), be gradually applied to the numerous areas such as water process.?
Drinking Water Industry, still based on chlorination, the application of disinfection by ultraviolet light is fewer for sterilization.Limit Ultraviolet Disinfection application
Factor mainly to have two: one be that it does not have lasting Disinfection Effect in pipe network, still need to use cooperatively with chlorine；Two is ultraviolet
Disinfection cost is higher.
Patent documentation publication number 102502928a discloses a kind of water sterilization method killing chlorine-resistant antibacterial, is related to a kind of life
The sterilization of drinking water alive, the method that particularly low cost kills chlorine-resistant antibacterial.It is characterized in that its process be chlorination mode with steady
Qualitative disinfection by chlorine dioxide mode is in parallel；It is used alternatingly.Achieve in little conventional water treatment process and the method for operation of changing
Under the conditions of, by changing the purpose that disinfection way is realized killing chlorine-resistant antibacterial and taken into account low cost.This sterilization method is only used for drinking
With chlorine-resistant antibacterial in water, when common liquid chlorine disinfection cannot be up to standard, the scope of application is narrower.
Patent documentation publication number 101597100 discloses a kind of drinking water chlorine dioxide-chloramines order and adds combined disinfection
Method.The method is: in the water after filtering in water treatment technique, add 0.10-0.20mg/l ClO 2 solution,
Stirring and evenly mixing, after reaction 8-12min, then adds 0.3-1.0mg/l chloramine solution, reacts 20-30min.Disclosed sterilization side
The chlorine dioxide used in method is explosive chemicals, runs safety and need to pay special attention to.ClO 2 solution required by this patent
Purity need to reach more than 95%, the more common chlorine dioxide of cost is many higher, will reduce its production application.
Content of the invention
It is an object of the invention to overcoming the shortcomings of above-mentioned technology, and a kind of multi-stage combination of Drinking Water is provided to sterilize
Method, solves chlorination and can generate teratogenesis, carcinogenic, mutagenic by-product and to inactivating efficacies such as virus especially two worms
Poor, ultraviolet does not have the problem of continuous disinfection effect it is achieved that the combination of ultraviolet and chlorination advantage.
The present invention for achieving the above object, employs the following technical solutions: a kind of multi-stage combination sterilization side of Drinking Water
Method, is characterized in that: includes V-shaped filter tank, the water purifying plant from the beginning of clear water reserviors, absorbing well, absorption well and water distribution pump house, in the production of water treatment plant
The multistage sterilization method that filter tank water outlet rear is combined with 2 points of chlorinations using disinfection by ultraviolet light, specifically comprises the following steps that
(1) between water treatment plant's V-shaped filter tank water side setting disinfection by ultraviolet light, and enter entering the water after filter between disinfection by ultraviolet light
Row disinfection by ultraviolet light；Detect the actual light transmittance of water after filter using UV transmittance detector, and be set to the saturating of ultraviolet generator
Light rate, ultraviolet generator monitors the operation water yield of water after filter according to actual online flow signal；Carry out the purple after disinfection by ultraviolet light
Outer water outlet must not detect giardia lamblia, Cryptosporidium, total plate count≤100cfu/ml, total coli group, heat-resisting coliform, big
Intestinal Escherichia all must not detect；
(2) liquid feeding chlorine at the ultraviolet water outlet of step (1) main technique main before clear water reserviors or sodium hypochlorite are carried out first
Point chlorination；Determine the dosage of liquid chlorine or sodium hypochlorite according to source quality and chlorine demand experimental result, and pass through chlorine residue
In-line analyzer carries out real-time adjustment to the on-line monitoring feedback data of chlorine residue；The water outlet chlorine residue controlling clear water reserviors is 0.1-
0.3mg/l, first point of chlorination time of contact is in more than 30min；Meanwhile, haloform, dichloroacetic acid and three chloroethenes are periodically paid close attention to
The chlorine disinfection by-product impact of acid, when chlorine disinfection by-product has exceeded phenomenon, adjusts chlorine dosage in time；
(3) by the clear water reserviors water outlet of step (2) in water distribution pump house water-absorbing well liquid feeding chlorine or sodium hypochlorite, carry out second point
Chlorination；By chlorine residue in-line analyzer to the on-line monitoring feedback data real-time adjustment liquid chlorine of chlorine residue or the throwing of sodium hypochlorite
Dosage, controls the output water chlorine residue after water distribution pump house water-absorbing well to be 0.7-1.0mg/l, meanwhile, periodically concern haloform, dichloro
The chlorine disinfection by-product impact of acetic acid and trichloroacetic acid, when chlorine disinfection by-product has exceeded phenomenon, adjusts chlorine dosage in time.
Described ultraviolet generator is middle pressure ultraviolet generator, and its range of flow is 2000-3200m3/ h, ultraviolet operation wavelength
For 254nm, uv dosage is >=40mj/cm2, the time of staying >=1s, intake during work optimum temperature≤40 DEG C.
The time of the chlorine disinfection by-product impact of described concern haloform, dichloroacetic acid and trichloroacetic acid is at least January
Once.
The disinfectant that described 2 points of chlorinations adopt is liquid chlorine or sodium hypochlorite.
Beneficial effect: compared with prior art, disinfection by ultraviolet light and 2 points of chlorinations are organically combined by the present invention, not only
Uv disinfection and advantage can be given full play to, but also played the continuous disinfection effect of liquid chlorine or sodium hypochlorite, also
The growing amount of chlorine disinfection by-product can be reduced to a certain extent, chlorine consumption can on the premise of ensureing Disinfection Effect simultaneously
Reduce, the two combines performance concurrent disinfection effect, comprehensive advantage substantially, can provide multistage sterilization protective screen for Drinking Water
Barrier.
Brief description
Fig. 1 is the process chart of the present invention.
Specific embodiment
Describe the specific embodiment of the present invention with reference to preferred embodiment in detail.
Refer to accompanying drawing, present embodiments provide a kind of multi-stage combination sterilization method of Drinking Water, including V-shaped filter tank,
The water purifying plant from the beginning of clear water reserviors, absorbing well, absorption well and water distribution pump house, is disappeared using ultraviolet at the production filter tank water outlet rear of water treatment plant
The multistage sterilization method that poison is combined with 2 points of chlorinations, specifically comprises the following steps that
(1) between water treatment plant's V-shaped filter tank water side setting disinfection by ultraviolet light, and enter entering the water after filter between disinfection by ultraviolet light
Row disinfection by ultraviolet light；Detect the actual light transmittance of water after filter using UV transmittance detector, and be set to the saturating of ultraviolet generator
Light rate, ultraviolet generator monitors the operation water yield of water after filter according to actual online flow signal；Carry out the purple after disinfection by ultraviolet light
Outer water outlet must not detect giardia lamblia, Cryptosporidium, total plate count≤100cfu/ml, total coli group, heat-resisting coliform, big
Intestinal Escherichia all must not detect；
(2) liquid feeding chlorine at the ultraviolet water outlet of step (1) main technique main before clear water reserviors or sodium hypochlorite are carried out first
Point chlorination；Determine the dosage of liquid chlorine or sodium hypochlorite according to source quality and chlorine demand experimental result, and by with color
The blue allusion quotation chlorine residue in-line analyzer of row carries out real-time adjustment to the on-line monitoring feedback data of chlorine residue；Control the water outlet chlorine residue of clear water reserviors
For 0.1-0.3mg/l, first point of chlorination time of contact is in more than 30min；Simultaneously it is proposed that at least paying close attention to three halogen first once a month
The chlorine disinfection by-products such as alkane, dichloroacetic acid and trichloroacetic acid affect, and adjust chlorine dosage in time when by-product has exceeded phenomenon；
(3) by the clear water reserviors water outlet of step (2) in water distribution pump house water-absorbing well liquid feeding chlorine or sodium hypochlorite, carry out second point
Chlorination；The on-line monitoring to chlorine residue for the chlorine residue in-line analyzer being produced by the excellent credible Science and Technology Ltd. in Tianjin, feedback
Data real-time adjustment liquid chlorine or the dosage of sodium hypochlorite, control the output water chlorine residue after water distribution pump house water-absorbing well to be 0.7-
1.0mg/l, meanwhile, at least chlorine disinfection by-product impact such as concern haloform, dichloroacetic acid and trichloroacetic acid once a month, when
By-product has during exceeded phenomenon and should adjust chlorine dosage in time.The disinfectant that described 2 points of chlorinations adopt is liquid chlorine or hypochlorous acid
Sodium.
Ultraviolet generator presses ultraviolet generator in adopting, and its range of flow is 2000-3200m3/ h, ultraviolet operation wavelength is
254nm, uv dosage is >=40mj/cm2, the time of staying >=1s, intake during work optimum temperature≤40 DEG C.
Embodiment 1
The Drinking Water disinfection technology of the present invention, takes the first water treatment plant's actual production filter tank water outlet to carry out ultraviolet and adds
2 points of chlorinations.Using actually detected UV transmittance, ultraviolet generator is configured, is believed in linear flow rate using reality
Number monitoring the process water yield run.Liquid chlorine dosage at main technique main before adjustment clear water reserviors and in water distribution pump house water-absorbing well,
So that the chlorine residue of chlorination controls in 0.1-0.3mg/l after filter, output water chlorine residue controls in 0.7-0.9mg/l.Do not add after measuring filter
The haloform index of chlorinated water and output water after chlorine water, filter, and before ultraviolet disinfection, after ultraviolet disinfection and after chlorination water thin
Bacterium sum and the total coliform group index, result is as shown in Table 1 and Table 2.
Comparative example 1
Example 1 identical water treatment plant actual production filter tank water outlet carries out ultraviolet and adds single-point chlorination, as right
Ratio test, is denoted as control sample 1.Using actually detected UV transmittance, ultraviolet generator is configured, using actual online
The process water yield of flow signal monitoring is run.Liquid chlorine dosage at main technique main before adjustment clear water reserviors is so that more than output water
Chlorine controls in 0.7-0.9mg/l.Measure filter after non-chlorinated water, filter after chlorinated water and output water haloform index, result is such as
Shown in table 1.
The first filter tank disinfection of effluent technology disinfection byproduct (DBP) growing amount synopsis of table 1
| Thms ratio | Non- chlorinated water after filter | Chlorinated water after filter | Output water |
| Embodiment 1 | 0.0078 | 0.0620 | 0.2250 |
| Control sample 1 | 0.0077 | 0.0815 | 0.3525 |
As shown in Table 1, when the first water treatment plant's actual production filter tank water outlet carries out ultraviolet and adds 2 points of chlorinations, due to
Control first point of chlorine dosage, the thms level being formed after making first point of chlorination controls in preferable scope, with ultraviolet
Line add single-point sterilization the identical clear water reserviors time of staying, output water chlorine residue level close under conditions of, the thms ratio of output water
Reduce 46.5%.
The first filter tank disinfection of effluent technology Disinfection Effect tables of data of table 2
As shown in Table 2, in actual production, ultraviolet disinfection has preferable removal effect to antibacterial, through ultraviolet disinfection one
Individual link completes the inactivation to antibacterial.Ultraviolet is combined with chlorination, the total colibacillary removal of common guarantee.
Embodiment 2
The Drinking Water disinfection technology of the present invention, takes the filter tank water outlet of second pilot scale water factory to carry out ultraviolet and add adding at 2 points
Chlorination.Using actually detected UV transmittance, ultraviolet generator is configured, is monitored using actual online flow signal
The process water yield run.Sodium hypochlorite dosage at main technique main before adjustment filtered water tank, using filtered water tank water outlet chlorine residue control
System is in 0.1-0.2mg/l.Measure after filter before chlorination, after chlorination after filter and the haloform of filtered water tank water outlet, dichloroacetic acid and three
The disinfection byproduct (DBP) index such as monoxone, and before ultraviolet disinfection, after ultraviolet disinfection, after chlorination and filtered water tank water outlet total number of bacteria
And total coliform group indicator, result is as shown in Table 3 and Table 4.
Comparative example 2
The filter tank water outlet of Example 2 identical pilot scale water factories carries out ultraviolet and adds single-point chlorination, tests as a comparison,
It is denoted as control sample 2.Using actually detected UV transmittance, ultraviolet generator is configured, using actual online flow signal
The process water yield of monitoring is run.Sodium hypochlorite dosage at main technique main before adjustment filtered water tank is so that more than filtered water tank water outlet
Chlorine controls in 0.7-0.9mg/l.Measure after filter before chlorination, after chlorination after filter and the haloform of filtered water tank water outlet, dichloroacetic acid
With the disinfection byproduct (DBP) indexs such as trichloroacetic acid, and before ultraviolet disinfection, after ultraviolet disinfection, after chlorination and filtered water tank water outlet antibacterial
Sum and total coliform group indicator, result is as shown in Table 3 and Table 4.
Comparative example 22
The filter tank water outlet of Example 2 identical pilot scale water factories carries out independent chlorination, tests as a comparison, is denoted as compareing
Sample 22.Sodium hypochlorite dosage at main technique main before adjustment filtered water tank is so that filtered water tank water outlet chlorine residue controls in 0.7-
0.9mg/l.Measure after filter before chlorination, after chlorination after filter and the haloform of filtered water tank water outlet, dichloroacetic acid and trichloroacetic acid etc.
Refer to the total number of bacteria of filtered water tank water outlet and total coli group after disinfection byproduct (DBP) index, and filter before chlorination, after chlorination after filter
Mark, result is as shown in Table 3 and Table 4.
Table 3 second filter tank disinfection of effluent technology disinfection byproduct (DBP) growing amount synopsis
As shown in Table 3, ultraviolet add 2 points of chlorinations to control disinfection byproduct (DBP) haloform nucleus formation obvious
Higher than ultraviolet plus single-point chlorination and independent chlorination.In embodiment 2 and comparative example 2, comparative example 22, front
Person is than the thms ratio respectively low 64.8% and 61.3% of both filtered water tank water outlets rear.
Table 4 second filter tank disinfection of effluent technology Disinfection Effect synopsis
As shown in Table 4, pilot scale water factory adds 2 points of chlorinations using ultraviolet, ultraviolet adds single-point chlorination and independent
The different disinfection way of three kinds of chlorination all has preferable sterilization effect, and filtered water tank water outlet does not all detect escherichia coli.With independent
Chlorination is compared, and the total number of bacteria through ultraviolet disinfection link for the water after filter has and declines by a relatively large margin, is added using ultraviolet plus 2 points
During chlorination mode, filtered water tank water outlet total number of bacteria does not detect, and illustrates that the antibacterial to chlorine in water with certain resistance can pass through ultraviolet
Line sterilization is inactivated.
Operation principle
Studies have found that, ultraviolet and two kinds of disinfection way of chlorine are different to the disinfecting power of same microorganism.Chlorine disappears
Poison has preferable inactivating efficacy to antibacterial under routine dose, but poor to virus especially inactivating efficacy such as " two worms ", only
Higher or just can play certain deactivation under the conditions of high dose very much, and disinfection by ultraviolet light just can be to thin under routine dose
Bacterium, virus, " two worms " etc. play good deactivation.
The thms growing amount of multi-point chlorination is significantly lower than single-point chlorination.Traditional sterilization process disposably adding chlorine is become
Add for gradation, on the premise of formerly carrying out disinfection by ultraviolet light, can obviously reduce first point of chlorine dosage, ensureing Disinfection Effect
Under the premise of it can be avoided that the Long contact time of the chlorhexidine-containing disinfectant of higher concentration and water, the growing amount of thms is significantly reduced.
Multistage sterilization strategy both improve water supply security, also provided emergency guarantee means.Therefore, adopt in actual production
With ultraviolet plus 2 points of chlorination combined disinfection technology, first water after filter is passed through ultraviolet disinfection, then carries out at 2 points to add
Chlorination, realize have complementary advantages it is established that sterilization multilevel security barrier.
The above-mentioned detailed description a kind of multi-stage combination sterilization method of this Drinking Water being carried out with reference to embodiment, is to say
Bright property rather than determinate, several embodiments can be included according to limited scope, therefore total without departing from the present invention
Changing and modifications under body design, should belong within protection scope of the present invention.
Claims (4)
1. the multi-stage combination sterilization method of a kind of Drinking Water, is characterized in that: includes V-shaped filter tank, clear water reserviors, absorbing well, absorption well and joins
The water purifying plant from the beginning of pump house, adopts disinfection by ultraviolet light and 2 points of chlorination phases at the production filter tank water outlet rear of water treatment plant
In conjunction with multistage sterilization method, specifically comprise the following steps that
(1) between water treatment plant's V-shaped filter tank water side setting disinfection by ultraviolet light, and carry out purple to entering the water after filter between disinfection by ultraviolet light
Outside line is sterilized；Detect the actual light transmittance of water after filter using UV transmittance detector, and be set to the light transmittance of ultraviolet generator,
Ultraviolet generator monitors the operation water yield of water after filter according to actual online flow signal；Carry out the ultraviolet water outlet after disinfection by ultraviolet light
Giardia lamblia, Cryptosporidium, total plate count≤100cfu/ml must not be detected, total coli group, heat-resisting coliform, large intestine angstrom are wished
Salmonella all must not detect；
(2) liquid feeding chlorine at the ultraviolet water outlet of step (1) main technique main before clear water reserviors or sodium hypochlorite are carried out at first point and adds
Chlorination；Determine the dosage of liquid chlorine or sodium hypochlorite according to source quality and chlorine demand experimental result, and online by chlorine residue
Analyser carries out real-time adjustment to the on-line monitoring feedback data of chlorine residue；The water outlet chlorine residue controlling clear water reserviors is 0.1-0.3mg/l,
First point of chlorination time of contact is in more than 30min；Meanwhile, periodically the chlorine of concern haloform, dichloroacetic acid and trichloroacetic acid disappears
Toxic byproduct affects, and when chlorine disinfection by-product has exceeded phenomenon, adjusts chlorine dosage in time；
(3) by the clear water reserviors water outlet of step (2) in water distribution pump house water-absorbing well liquid feeding chlorine or sodium hypochlorite, carry out second point chlorination
Sterilization；By chlorine residue in-line analyzer to the on-line monitoring feedback data real-time adjustment liquid chlorine of chlorine residue or adding of sodium hypochlorite
Amount, controls the output water chlorine residue after water distribution pump house water-absorbing well to be 0.7-1.0mg/l, meanwhile, periodically concern haloform, two chloroethenes
The chlorine disinfection by-product impact of acid and trichloroacetic acid, when chlorine disinfection by-product has exceeded phenomenon, adjusts chlorine dosage in time.
2. the multi-stage combination sterilization method of Drinking Water according to claim 1, is characterized in that: described ultraviolet generator
Using in press ultraviolet generator, its range of flow be 2000-3200m3/ h, ultraviolet operation wavelength be 254nm, uv dosage be >=
40mj/cm2, the time of staying >=1s, intake during work optimum temperature≤40 DEG C.
3. the multi-stage combination sterilization method of Drinking Water according to claim 1, is characterized in that: described concern three halogen first
The time of the chlorine disinfection by-product impact of alkane, dichloroacetic acid and trichloroacetic acid is at least once a month.
4. the multi-stage combination sterilization method of Drinking Water according to claim 1, is characterized in that: described 2 points of chlorinations disappear
The disinfectant that poison adopts is liquid chlorine or sodium hypochlorite.
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| CN109944301A (en) * | 2019-04-25 | 2019-06-28 | 北京市市政工程设计研究总院有限公司 | A kind of clear water reserviors absorbing well, absorption well system and application method |
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