CN205687687U - A kind of control the system of iodo disinfection byproduct (DBP) in water - Google Patents
A kind of control the system of iodo disinfection byproduct (DBP) in water Download PDFInfo
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- CN205687687U CN205687687U CN201620513618.2U CN201620513618U CN205687687U CN 205687687 U CN205687687 U CN 205687687U CN 201620513618 U CN201620513618 U CN 201620513618U CN 205687687 U CN205687687 U CN 205687687U
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Abstract
This utility model provides a kind of and controls the system of iodo disinfection byproduct (DBP) in water, and described system, including the persulfate activation device, advanced oxidation device, coagulative precipitation device and the filtration treatment device that are sequentially connected.Iodide ion in water is oxidized to nontoxic iodate by described system, thus avoids the generation of iodo disinfection byproduct (DBP).Oxidant used is potentiometric titrations produced by iron salt activation persulfate, utilizes its strong oxidizing property to carry out iodine oxide ion.The system of iodo disinfection byproduct (DBP) in control water described in the utility model, is oxidized to the iodide ion in water nontoxic iodate, and synchronizes to remove precursor organic precursor thing, thus avoid the generation of iodo disinfection byproduct (DBP).
Description
Technical field
This utility model relates to a kind of controlling the method and system of iodo disinfection byproduct (DBP) in water, a kind of ferrum specifically
Salt-persulfate advanced oxidation system control iodo disinfection byproduct (DBP) in water method and system, belong to water technology neck
Territory.
Background technology
Mainly there are cholorination, disinfection by chlorine dioxide, disinfection by ultraviolet light and ozone in China for the method for drinking water disinfection
Sterilization.Conventional chlorhexidine-containing disinfectant has liquid chlorine, bleaching powder, bleaching extract plate, sodium hypochlorite etc..Disease caused by infectious water is killed former micro-at cholorination
While biology, chlorine reacts with the Organic substance in water, produces a series of Chlorination Disinfection By-products.Generally will water can be formed with chlorine
The Organic substance of by-product is referred to as organic precursor thing.In natural water, organic precursor thing is mainly with humus as main component, next to that
Algae and metabolite, protein etc..
Iodo disinfection byproduct (DBP) (I-DBPS) it is the class found in Disinfection Procedure of drinking Water the most controlled temporary emerging high cause
Toxic disinfection byproducts, accounts for about the 1% of total halogenated organic matters (TOX).As far back as 1975 just it has been reported that iodo haloform
Have been identified as the by-product of chlorine and chloramines disinfection, but research afterwards is concerned only with the bad of iodo haloform generation always
Abnormal smells from the patient and the impact on drinking water of the medicine mouthfeel, only define its olfact scope (0.02～5 μ g/L) in drinking water.By
In lacking the epidemic data that complete crowd exposes, and the difference of country variant drinking water processing technique, cause I-
The situations such as DBPS is of a great variety and quantity differs, iodo is not sterilized by-product by World Health Organization (WHO), U.S. EPA, European Union and China
Thing content in drinking-water proposes running water requirement, also results in iodo by-product and not yet causes the enough attention of people.
Iodo by-product has extremely strong cytotoxicity and genotoxicity, and research recently shows, the cell of iodo by-product
With genetoxic far above bromo by-product (Bromo-DBPs) and chloro by-product (Chloro-DBPs).Iodoform thin
Cellular toxicity is 146 times of chloroform, 60 times of bromoform；The mutagenicity of iodoacetic acid is more than 500 times of dichloroacetic acid, is
2.6 times of dibromoacetic acid, iodoacetic acid is the disinfection byproduct (DBP) most with genotoxicity, and reduced levels just can affect
The growth of mice embryonic.Additionally, iodo disinfection byproduct (DBP) can cause drinking water to have bad smell and medicine mouthfeel.In view of iodo
The toxicity that disinfection byproduct (DBP) is high, and it is not yet put into the daily monitoring range of water quality index, once iodine occurs in drinking water
For by-product, it will residents ' health is constituted bigger threat.
The end product form that iodide ion and disinfectant are reacted is to affect the critical process that iodo by-product is formed.Drinking
During water sterilization, iodide ion (I-) first can react generation Hypoiodous acid (HIO) (HOI), follow-up anti-of HOI with disinfectant or oxidant
Answer path will to determine the generation situation of iodo by-product.On the whole, there are two kinds of predominating paths.Approach one is HOI and in water
Natural organic matter (NOM) occurs series of complex reaction to generate iodo disinfection byproduct (DBP), including iodo-acid and iodomethane two
Class, is respectively provided with stronger toxicity；Approach two is that HOI is further oxided generation iodite (IO2-) and iodate (IO3-)。
I-、IO2-、IO3-all cannot generate iodo disinfection byproduct (DBP), and end product iodate with natural organic matter (NOM) direct reaction
Different from high carcinogenic material bromate, iodate can be degraded into rapidly by human body by the effect of glutathion in human body
Iodide ion that thyroid is absorbed and harmless therefore, if the reaction of approach two can be facilitated, the general realized the most as far as possible
Iodide ion is to effective conversion of iodate, it is possible to avoid the generation of iodo disinfection byproduct (DBP).
Utility model content
This utility model is i.e. for the problems referred to above, it is provided that a kind of control the system of iodo disinfection byproduct (DBP) in water.
Specifically, the system of iodo disinfection byproduct (DBP) in described control water, including 1 be sequentially connected) persulfate
Activation device, 2) advanced oxidation device, 3) coagulative precipitation device and 4) filtration treatment device.
Further, described persulfate activation device includes persulfate storage pool, iron salt storage pool and persulfate
Activating tank, persulfate storage pool is passed through in persulfate activating tank by effusion meter and chemicals feed pump, and iron salt storage pool is by stream
Gauge and chemicals feed pump are passed through in persulfate activating tank, and in persulfate activating tank, iron salt activation persulfate produces and continues
Stable potentiometric titrations.
Further, described advanced oxidation device includes water inlet pipe, intake pump, water inlet liquid level effusion meter, oxidation pond, stirring
Device and persulfate add throwing device, and water inlet pipe is passed through oxidation pond by intake pump and water inlet liquid level effusion meter, and agitator inserts oxygen
Changing in pond, persulfate adds throwing device and connects persulfate activating tank and oxidation pond, is introduced by potentiometric titrations in oxidation pond,
Nontoxic iodate is become with iodide ion rapid oxidation.Persulfate adds throwing device and includes that persulfate adds throwing effusion meter and mistake
Sulfate adds throwing pump, according to the change of influent quality, added amount of chemical can be carried out real-time monitoring, in the situation ensureing water quality
Under, save medicament.
Further, described coagulative precipitation device includes that mixing pit, sedimentation tank, agitator, aluminium polychlorid (PAM) add throwing
Pump and mud discharging device, mixing pit communicates with oxidation pond, and sedimentation tank communicates with mixing pit, and mud discharging device is positioned at bottom sedimentation tank, stirs
Mixing device and insert in mixing pit, aluminium polychlorid (PAM) adds throwing pump and communicates with mixing pit, going of this stage strengthening organic precursor thing
Remove.
Further, described filtration treatment device includes filter, backwash water inlet pipe, backwash effusion meter, outlet pipe
And overflow pipe, described filter connects with sedimentation tank, and the bottom of filter is provided with outlet pipe, and the top of filter is provided with overflow
Pipe, backwash water inlet pipe connects filter by backwash effusion meter.
Further, described filter includes active carbon filter.
Utilize said system to control iodo disinfection byproduct (DBP) in water, the iodide ion in water is oxidized to nontoxic iodine
Hydrochlorate, thus avoid the generation of iodo disinfection byproduct (DBP).Oxidant used is sulphuric acid produced by iron salt activation persulfate
Root free radical, utilizes its strong oxidizing property to carry out iodine oxide ion.
Utilizing said system to control iodo disinfection byproduct (DBP) in water, controllable iodo disinfection byproduct (DBP) includes: iodo
Methane, iodo-acid, iodo amide, the big class of iodoacetonitrile four.Iodomethane specifically includes: chlorine one iodine one bromomethane
(CHBrClI)), an iodine methylene bromide (CHBr2I)), an iodine dichloromethane (CHCl2I)), chlorodiiodomethane (CHClI2))、
Bromodiiodomethane (CHBrI2) and iodoform (CHI3)；Iodo-acid includes iodoacetic acid, bromine iodoacetic acid, (E) _ 3_ bromine _ 3_ iodine third
Olefin(e) acid, (Z) _ 3_ bromine _ 3_ iodopropylene acid and (E) _ 2_ iodine _ 3_ methylmaleic acid；Iodo amide specifically includes: iodoacetamide
(IAcAm), two iodoacetamides (DIAcAm), bromine iodoacetamide (BIAcAm) and chlorine iodoacetamide (CIAcAm)；Iodoacetonitrile class
By-product specifically includes iodoacetonitrile (ICN), two iodoacetonitriles (DICN), bromine iodoacetonitrile (BICN) and chlorine iodoacetonitrile (CICN).
In control water described in the utility model, the system of iodo disinfection byproduct (DBP), is oxidized to nontoxic by the iodide ion in water
Harmless iodate, thus avoid the generation of iodo disinfection byproduct (DBP).
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the system of iodo disinfection byproduct (DBP) in control water described in the utility model
Figure.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme described in the utility model is described without limitation, it is therefore an objective to be easy to
The public is best understood from described technical scheme.
As it is shown in figure 1, the system of iodo disinfection byproduct (DBP) in control water described in the utility model, including being sequentially connected
: persulfate activation device, advanced oxidation device, coagulative precipitation device and filtration treatment device.Described persulfate is lived
Gasifying device includes that persulfate storage pool 11, iron salt storage pool 12 and persulfate activating tank 10, persulfate storage pool 11 lead to
Inflow-rate of water turbine meter 110 and chemicals feed pump 111 are passed through in persulfate activating tank 10, and iron salt storage pool 12 is by effusion meter 120 and dispensing
Pump 121 is passed through in persulfate activating tank 10, and in persulfate activating tank 10, iron salt activation persulfate produces continual and steady
Potentiometric titrations.Described advanced oxidation device includes that oxidation pond 20, agitator 21, persulfate add throwing device 22, water inlet
Pipe 23, intake pump 24, water inlet liquid level effusion meter 25, water inlet pipe 23 is passed through oxidation by intake pump 24 and water inlet liquid level effusion meter 25
Pond 20, agitator 21 inserts in oxidation pond 20, and persulfate adds throwing device 22 and connects persulfate activating tank 10 and oxidation pond 20,
Being introduced by potentiometric titrations in oxidation pond 20, become nontoxic iodate with iodide ion rapid oxidation, persulfate adds throwing
Device 22 includes that persulfate adds throwing effusion meter and persulfate adds throwing pump, can be according to the change of influent quality, to adding of agent
Amount carries out real-time monitoring, in the case of ensureing water quality, saves medicament；Described coagulative precipitation device includes mixing pit 30, stirring
Device 31, aluminium polychlorid (PAM) add throwing pump 32, sedimentation tank 33 and mud discharging device 34, and mixing pit 30 communicates with oxidation pond 20, stirring
Device 31 inserts in mixing pit 30, and aluminium polychlorid (PAM) adds throwing pump 32 and communicates with mixing pit 30, sedimentation tank 33 and mixing pit 30 phase
Logical, mud discharging device 34 is positioned at bottom sedimentation tank 33, in the removal of this stage strengthening organic precursor thing；Described filtration treatment device bag
Include active carbon filter 40, the top of filter is provided with overflow pipe 41, and the bottom of filter is provided with outlet pipe 42, and backwash is intake
Pipe 43 connects filter by backwash effusion meter 44.
Utilize the system of iodo disinfection byproduct (DBP) in control water described in the utility model, be controlled iodo sterilization in water
By-product, carries out iron salt activation persulfate in the persulfate activation device stage, produces continual and steady potentiometric titrations
(SO4·-)；In the oxidation unit stage, potentiometric titrations (SO4·-) strong oxidation iodide ion rapid oxidation is become nontoxic nothing
The iodate of evil；Complete to strengthen the removal of organic precursor thing in the coagulative precipitation device stage；Remove in the filtration treatment device stage
The iron ion of excess in water.
Concrete, reaction mechanism and reaction equation explanation:
1) priming reaction section:
As a example by ferrous iron, ferrous activation persulfate reaction equation (1-1).The Fe produced in course of reaction3+, it is a kind of environment
Friendly coagulant, is widely used in the process of drinking water, can the effect of effective enhanced coagulation unit, remove organic contamination
Thing, can strengthen the removal effect of organic precursor thing iodo disinfection byproduct (DBP) controls from another approach.
The potentiometric titrations SO that activation produces4 ·-Neutral more stable with under acid condition；And under the conditions of meta-alkalescence,
The SO generated4 ·-Can react further and generate the OH equally with strong oxidizing property·(reaction equation (1-2), (1-3)).SO4 ·-
With OH·Coexist in aqueous solution, form diradical reaction system.In the control of I-DBPs, diradical system has it
The advantage that his oxidizing process is incomparable: first, the applicable pH range of diradical system is wider, at acid, neutral and alkaline bar
Preferable activity it is respectively provided with under part；Secondly, diradical makes reaction system oxidability become more to enrich, can make up list
Solely SO4 ·-With OH·The narrow-mindedness that organic precursor thing is removed, it is possible to more fully can send out with iodide ion and organic precursor thing
Raw a series of chain type free base reaction, it is achieved effective control of I-DBPs.
2) advanced oxidation conversion zone
Iodide ion (I-) first can be with SO4 ·-With OH·Reaction generates Hypoiodous acid (HIO) (HOI) (formula (1-4)-formula (1-6)), HOI quilt
Oxidation generates iodite (IO further2 -) and iodate (IO3 -).(formula (1-6))
I-+HO→I+OH- (1-5)
I-+I→+HOI/OI- (1-6)
Concrete, described controls the method for iodo disinfection byproduct (DBP) in water, comprises the steps:
A: iron salt activation persulfate produces continual and steady potentiometric titrations (SO4·-)；
Iodide ion rapid oxidation is become nontoxic iodate by the strong oxidation of B: potentiometric titrations；
C: the removal of strengthening organic precursor thing；
D: remove the iron ion of excess in water.
Described step A comprises the steps:
1): described iron salt includes: Fe2+、Fe0、Fe3O4、Fe-Fe2O3；
2): described persulfate includes: peroxy-monosulfate (peroxymonosulfate, PMS) and peroxydisulfate
(peroxydisulfate, PDS)；
3): the mol ratio of iron salt (in terms of Fe) and persulfate is as 0.8:1；
4): the response time that adds of iron salt is 15 minutes, the dosing method of iron salt include one section add, two sections add, three
Section adds and adds continuously.
Described step B comprises the steps:
1) mol ratio of initial iodide ion (I-) is that 10:1 adds throwing to persulfate with water；
2) oxidation time is 12 minutes；
3) pH value of solution scope is 5；
4) reaction temperature is 20 DEG C.
Described step C is by the removal of coagulating sedimentation unit strengthening organic precursor thing, by adding throwing aluminium polychlorid
(PAM), utilize Fe produced by step A simultaneously3+Enhanced coagulation effect, reaches strengthening and removes the purpose of organic precursor thing, described
In step C, 1) mix and blend reaction rotating speed is 200r/min；2) the mix and blend response time is 15min.
Described step D specially utilizes the adsorption that retains of activated carbon to remove the iron ion of excess, described biology in water
Activated carbon is carbon post, and the height of described carbon post is that 0.9m, EBCT control at 18min, and backwash uses the mode of water punching, flushing water
Intensity is 17L/m2.s, the time is 8min.
It should be understood that foregoing includes that accompanying drawing is not the restriction to described technical scheme, it is true that identical or
Under the principle of approximation, the improvement carrying out described technical scheme, including the shape of each several part device, size, material used in system
Matter, the identical or equivalent of approximation function element, thus obtained technical scheme is all in the technology required by this utility model
Within scheme.
Claims (6)
1. one kind controls the system of iodo disinfection byproduct (DBP) in water, it is characterised in that: include the persulfate activation being sequentially connected
Device, advanced oxidation device, coagulative precipitation device and filtration treatment device.
The system of iodo disinfection byproduct (DBP) in control water the most according to claim 1, it is characterised in that: described persulfate
Activation device includes persulfate storage pool, iron salt storage pool and persulfate activating tank, and persulfate storage pool passes through flow
Meter and chemicals feed pump are passed through in persulfate activating tank, and iron salt storage pool is passed through persulfate activating tank by effusion meter and chemicals feed pump
In, in persulfate activating tank, iron salt activation persulfate produces continual and steady potentiometric titrations.
The system of iodo disinfection byproduct (DBP) in control water the most according to claim 1 and 2, it is characterised in that: described senior
Oxidation unit includes that water inlet pipe, intake pump, water inlet liquid level effusion meter, oxidation pond, agitator and persulfate add throwing device, water inlet
Pipe is passed through oxidation pond by intake pump and water inlet liquid level effusion meter, and agitator inserts in oxidation pond, and persulfate adds throwing device even
Take over sulfate activating tank and oxidation pond, potentiometric titrations is introduced in oxidation pond, become nontoxic nothing with iodide ion rapid oxidation
The iodate of evil, persulfate adds throwing device and includes that persulfate adds throwing effusion meter and persulfate adds throwing pump, can be according to water inlet
The change of water quality, carries out real-time monitoring to added amount of chemical, in the case of ensureing water quality, saves medicament.
The system of iodo disinfection byproduct (DBP) in control water the most according to claim 1 and 2, it is characterised in that: described coagulation
Settler includes that mixing pit, sedimentation tank, agitator, aluminium polychlorid (PAM) add throwing pump and mud discharging device, mixing pit and oxidation
Pond communicates, and sedimentation tank communicates with mixing pit, and mud discharging device is positioned at bottom sedimentation tank, and agitator inserts in mixing pit, polyaluminium
Aluminum (PAM) adds throwing pump and communicates with mixing pit, in the removal of this stage strengthening organic precursor thing.
The system of iodo disinfection byproduct (DBP) in control water the most according to claim 1 and 2, it is characterised in that: described filtration
Processing means includes filter, backwash water inlet pipe, backwash effusion meter, outlet pipe and overflow pipe, described filter and precipitation
Pond connects, and the bottom of filter is provided with outlet pipe, and the top of filter is provided with overflow pipe, and backwash water inlet pipe passes through backwash
Effusion meter connection filter.
The system of iodo disinfection byproduct (DBP) in control water the most according to claim 5, it is characterised in that: described filter bag
Include active carbon filter.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906097A (en) * | 2016-05-31 | 2016-08-31 | 深圳职业技术学院 | Method and system for controlling iodo-disinfection byproduct in water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906097A (en) * | 2016-05-31 | 2016-08-31 | 深圳职业技术学院 | Method and system for controlling iodo-disinfection byproduct in water |
| CN105906097B (en) * | 2016-05-31 | 2019-01-22 | 深圳职业技术学院 | The method and system of iodo disinfection by-products in a kind of control water |
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