CN106365367A - Multi-stage combined disinfection method for domestic drinking water - Google Patents

Multi-stage combined disinfection method for domestic drinking water Download PDF

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Publication number
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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China
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water
disinfection
chlorine
ultraviolet
ultraviolet light
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Inventor
方自毅
张怡然
何凤华
李晨
张伟林
马文红
李建科
常华
刘宁
赵宇
郑玲
于益群
董捷
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TIANJIN TEDA JINLIAN WATER SUPPLY GENERAL Co
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TIANJIN TEDA JINLIAN WATER SUPPLY GENERAL Co
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Priority to CN201610912056.3A priority Critical patent/CN106365367A/en
Publication of CN106365367A publication Critical patent/CN106365367A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/30Treatment of water, waste water, or sewage by irradiation
    • C02F1/32Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/50Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/76Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/02Non-contaminated water, e.g. for industrial water supply
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/29Chlorine compounds

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  • 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

The multi-stage combination sterilization method of Drinking Water
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.
CN201610912056.3A 2016-10-19 2016-10-19 Multi-stage combined disinfection method for domestic drinking water Pending CN106365367A (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN107758924A (en) * 2017-11-08 2018-03-06 许伟琦 A kind of medical sewage processing method for preventing carcinogen and inorganic agent
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
CN114230066A (en) * 2021-12-29 2022-03-25 宁夏上泽龙水利水电工程有限公司 Rural drinking water disinfection method

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