CN105378178B - Corruption slurry suppressing method - Google Patents
Corruption slurry suppressing method Download PDFInfo
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- CN105378178B CN105378178B CN201480039317.4A CN201480039317A CN105378178B CN 105378178 B CN105378178 B CN 105378178B CN 201480039317 A CN201480039317 A CN 201480039317A CN 105378178 B CN105378178 B CN 105378178B
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- Prior art keywords
- aeration
- boiled water
- plain boiled
- slime
- water circulating
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control
- D21H21/04—Slime-control agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control
Abstract
It is an object of the invention to provide a kind of rotten slurry suppressing method effective in the plain boiled water circulating system (22) of copy paper process.It is the rotten slurry suppressing method in the plain boiled water circulating system (22) of copy paper process, with following process：Dialogue water cycle system (22) and be directed into any one of aqueous systems (19) of plain boiled water circulating system (22) or both carry out oxygen-containing gas aeration process；And in the central process by being aerated addition slime-control agent at least one system for the aeration that process carries out oxygen-containing gas of plain boiled water circulating system (22) and importing aqueous systems (19).Can further have the process that at least one project in the measure project team being made up of oxidation-reduction potential, sulfurous acid ion concentration and dissolved oxygen content of dialogue water cycle system (22) is measured, based on the measurement result obtained by the mensuration operation, the slime-control agent addition that the aeration quantity and/or slime-control agent for being aerated process add process is controlled.
Description
Technical field
The present invention relates to the rotten slurry suppressing method in the plain boiled water circulating system of copy paper process.
Background technology
Currently, paper processed be by being carried out to making the raw material slurry that paper pulp raw material is dispersed in water carry out copy paper,
Now, the plain boiled water containing microfibre, filler is discharged in large quantities by paper machine etc..In addition, effectively applying flexibly, again from water resource
From the viewpoint of utilization, plain boiled water is set to be recycled in copy paper process.But, because plain boiled water is in large quantities containing starch, applying glue
The organic matters such as agent, latex, casein, therefore it is suitable for the breeding of the microorganisms such as bacterium class, Mycophyta, from mentioned microorganism
Corruption slurry is easily produced in recirculated water system or on pipeline, equipment surface.Because above-mentioned rotten slurry is mixed into product, make product matter
Amount, production efficiency reduction.In order to concentrate above-mentioned microfibre, starch etc. in plain boiled water circulating system, and discard one part and lead
Enter new water, but only can not so solve the above problems.
Regarding to the issue above, develop in a kind of circulating system to plain boiled water and add the slime-control agents such as organic series antibacterial agent
Antibiotic method (with reference to Japanese Unexamined Patent Publication 2003-164882 publications).But, when above-mentioned organic matter addles, micro organism quantity increases
Adduction and the in large quantities reducing substances such as generation hydrogen sulfide, mercaptan.On the other hand, most slime-control agents are oxidant, therefore
Before it is reacted with microorganism, with the sulfurous acid ion reaction from reducing substances, cause playing desired
It is largely consumed before antibacterial effect.Therefore, in order to be adequately suppressed the generation of rotten slurry, it is necessary to add add it is upper because with sulfurous acid
Ionic reaction and the substantial amounts of slime-control agent of slime-control agent amount being consumed.In addition, slime-control agent price is higher, scheme
The more effectively rotten slurry suppressing method of offer, the reduction of its usage amount are provided.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2003-164882 publications
The content of the invention
Problems to be solved by the invention
The present invention be directed to it is above-mentioned such the problem of and make, it is therefore an objective to a kind of plain boiled water in copy paper process is provided and circulated
Effective rotten slurry suppressing method in system.
The solution used to solve the problem
Further investigation is repeated in order to solve the above problems in the present inventor, as a result finds, passes through dialogue water circulation body
The aqueous systems for being or being directed into plain boiled water circulating system (are referred to as " importing aqueous systems " or are only called " aqueous systems ".) carry out it is oxygen-containing
The aeration of gas, then, is added into the plain boiled water circulating system or importing aqueous systems of the above-mentioned aeration for carrying out oxygen-containing gas
Slime-control agent, it is possible thereby to effectively suppress the generation of rotten slurry, so as to complete the present invention.
In order to which the invention for solving the above problems and making is a kind of rotten slurry suppressing method, it is characterised in that it is in copy paper
Rotten slurry suppressing method in the plain boiled water circulating system of process, with following process：To above-mentioned plain boiled water circulating system and it is directed into
The process that any one of aqueous systems of above-mentioned plain boiled water circulating system or both carry out the aeration of oxygen-containing gas；And to above-mentioned
At least the one of the aeration of oxygen-containing gas is carried out among plain boiled water circulating system and above-mentioned importing aqueous systems by above-mentioned aeration process
The process that slime-control agent is added in individual system.
The corruption starches suppressing method by the dialogue water cycle system in aeration process and is directed into the plain boiled water circulating system
Any one of aqueous systems or both carry out the aeration of oxygen-containing gas, can significantly decrease oxygenous added to the carry out
The addition of slime-control agent in the system of the aeration of body.It is used as its principle, thus it is speculated that cause due to the oxygen in oxygen-containing gas
The oxidation of reducing substances, oxygen-containing gas be dissolved in the reproducibility thing such as hydrogen sulfide caused by plain boiled water circulating system in large quantities
The solubility of matter is reduced, so that sulfurous acid ion concentration reduction in plain boiled water circulating system etc. is main cause.
Corruption slurry suppressing method preferably further has being selected from by oxidation-reduction potential, Asia to above-mentioned plain boiled water circulating system
The process that at least one project in the measure project team of sulfate ion concentration and dissolved oxygen content composition is measured, based on logical
The measurement result that the mensuration operation is obtained is crossed, the rotten slurry that process is added to the aeration quantity and/or slime-control agent for being aerated process is controlled
Preparation addition is controlled., can be with more stable and effectively by adjusting above-mentioned aeration quantity and/or slime-control agent addition
Suppress the generation of rotten slurry.
The slime-control agent addition of aeration quantity and/or slime-control agent the addition process of the above-mentioned aeration process of preferred pair enters
OK, using become the oxidation-reduction potential of plain boiled water circulating system as more than -150mV, sulfurous acid ion concentration be 2.0mgSO3 -/L
Below and dissolved oxygen content for more than 1mg/L it is any at least one.By being so adjusted, it can more effectively suppress rotten
The generation of slurry.
Using the aeration tank in bottom with diffuser in the aeration of the above-mentioned aeration process of preferred pair, the diffuser is utilized
Aeration quantity is every 1m of aeration tank2Unit floor space is 0.5m3More than/hour and 10m3Below/hour.By so adjusting exposure
Tolerance, can further promote the reduction of above-mentioned slime-control agent.
The effect of invention
According to the present invention it is possible to provide the effective rotten slurry suppressing method in the plain boiled water circulating system of copy paper process.In addition,
The usage amount of slime-control agent can also be reduced.
Brief description of the drawings
Fig. 1 is the figure for a mode for representing the copy paper process of the present invention.
Embodiment
＜ corruption slurry suppressing methods ＞
Corruption slurry suppressing method is the rotten slurry suppressing method in the plain boiled water circulating system of copy paper process, and it has following work
Sequence：Any one of above-mentioned plain boiled water circulating system and the aqueous systems for being directed into above-mentioned plain boiled water circulating system or both are carried out
The process of the aeration of oxygen-containing gas；And pass through above-mentioned aeration among above-mentioned plain boiled water circulating system and above-mentioned importing aqueous systems
Process carries out the process that slime-control agent is added at least one system of the aeration of oxygen-containing gas.
It is further preferred, that corruption slurry suppressing method also has being selected from by redox to above-mentioned plain boiled water circulating system
The work that at least one project in the measure project team of current potential, sulfurous acid ion concentration and dissolved oxygen content composition is measured
Sequence.
Hereinafter, it is described in detail for corruption slurry suppressing method.
＜ plain boiled water circulating systems ＞
Corruption slurry suppressing method is the method in the plain boiled water circulating system applied to copy paper process.Here, " plain boiled water " refers to
The aqueous solution discharged in large quantities by paper machine etc. in copy paper process in paper processed.Plain boiled water makes when containing from usual copy paper
The microfibre of starting pulps, other paper medicaments processed etc.." plain boiled water circulating system " refers to be circulated in copy paper process
The plain boiled water utilized." being directed into the aqueous systems of plain boiled water circulating system " refers to be used for pulp, plain boiled water in plain boiled water circulating system
Concentration adjustment etc. aqueous systems.Be not particularly limited as above-mentioned aqueous systems, for example, the soft water of paper processed can be included, it is hard
Water etc., in the range of the effect of the present invention is not influenceed, can contain a small amount of paper medicament processed.In addition, plain boiled water circulating system
Can possess equipment for separating liquid from solid, the solid constituent after separation can be discharged outside system, raw material system can also be recycled to.
The starting pulps used during as copy paper, are not particularly limited, for example, can include：Bleached hardwood kraft pulp
(LBKP), coniferous tree bleached kraft pulp (NBKP), the non-bleached kraft pulp of broad leaf tree (LUKP), the non-BK bleached kraft of coniferous tree
Starch chemical pulps such as (NUKP)；Groundwood pulp (GP), thermomechanical pulp (TMP), CTMP (CTMP), refiner mechanical
Starch mechanical pulps such as (RMP)；By giving up that cardboard waste paper, liner plate waste paper, waste magazine paper, newspaper waste paper, title deed for land waste paper etc. regenerate
Paper paper pulp；Good quality paper old paper stock, de inked pulp etc..
As paper medicament processed, it is not particularly limited, for example, can includes：It is surfactant, wax, sizing agent, filler, anti-
Become rusty agent, conductive agent, defoamer, dispersant, viscosity modifier, aggregating agent, coagulating agent, paper power reinforcing agent, productivity ratio enhancer, paper
Consider anti-dropout agent, leavening agent etc. to be worth doing.
＜ aeration processes ＞
In the process, any one of dialogue water cycle system and aqueous systems or both carry out the exposure of oxygen-containing gas
Gas.Compared with the situation without being aerated process, by increase oxygen amount in plain boiled water circulating system or be maintained at it is a certain amount of with
On, it is possible to achieve the reduction of the addition of slime-control agent, effective suppression of rotten slurry generation in copy paper process.In addition, in the work
In sequence, when to aqueous systems carry out oxygen-containing gas aeration when, compared with the substantial amounts of plain boiled water in plain boiled water circulating system, by compared with
A small amount of above-mentioned aqueous systems are effectively aerated, and can easily suppress the generation of the overall rotten slurry of plain boiled water circulating system.
Realized for implementing above-mentioned aeration by any one of dialogue water cycle system and aqueous systems or both
The reasons why the effect above, is not yet clear and definite, but can for example be speculated by following.That is, because most slime-control agents are
Oxidant, therefore before it is reacted with microorganism, with the reproducibility from hydrogen sulfide, the mercaptan for coming from microorganism etc.
The sulfurous acid ion reaction of material, causes its before desired antibacterial effect is played largely to be consumed.But, pass through oxygen-containing gas
In oxygen sulfurous acid ion is aoxidized, sulfurous acid ion can be oxidized to harmless sulfate ion etc..In addition, by containing
Carrier of oxygen is dissolved in plain boiled water circulating system in large quantities, the partial pressure reduction of the reducing substances such as hydrogen sulfide, can make reducing substances
Solubility reduction.As a result, can be while the sulfurous acid ion concentration in plain boiled water circulating system be reduced, while reducing rotten slurry control
The addition of preparation.In addition, thus it is speculated that can effectively suppress the generation of rotten slurry without excessive slime-control agent amount.
In addition, the addition by reducing slime-control agent, can also suppress a large amount of using caused of slime-control agent
The tone variations of paper, the harmful effect to papery such as rotten of dyestuff.Further, middle during operating continuously it can also clean
Ground maintains all regions in plain boiled water circulating system, during extension operation.
Aeration is carried out using oxygen-containing gas.As oxygen-containing gas, it is not particularly limited, for example, can includes：Oxygen monomer,
Oxygen containing mixed gas such as air etc..Among these, from the viewpoint of easiness is obtained, preferably mixed gas is more excellent
Elect air as.As the gas beyond deoxygenation in mixed gas, it can include：Gas known to nitrogen, carbon dioxide etc..It is oxygen-containing
Gas may be used alone, can also be used in combination two or more.
As aeration method, as long as can contain to any one of plain boiled water circulating system and aqueous systems or both supply
Carrier of oxygen is just not particularly limited, and can include：Use diffuser, stirring etc..Among these, in order to stablize and continue
Ground is aerated, and preferably uses diffuser.Specifically, by bottom up side blow afloat minute bubbles, improve plain boiled water or water with it is oxygen-containing
The contacting efficiency of gas, it is possible thereby to be more effectively carried out aeration.It is not particularly limited, for example, can includes for diffuser：
The bore of every more than 5cm and below 50cm places with more than diameter 1mm and below 5mm.Diffuser can have one, it is possibility to have
It is multiple.
As the place being aerated in plain boiled water circulating system or in aqueous systems, it is not particularly limited, for example, can arranges
Enumerate：In pipeline, in water route, aeration tank etc..Among these, in order to be aerated more effectively and on a large scale, preferably
For aeration tank, more preferably bottom has the aeration tank of diffuser.The shape of aeration tank is not particularly limited, for example, can enumerate
Go out：Box-shaped, circle, ellipse, mortar shape etc..In addition, aeration tank can only set one, it can also set multiple.
It is not particularly limited using the aeration quantity of diffuser, every 1m of aeration tank2Unit floor space is preferably 0.5m3/ hour
Above and 10m3Below/hour, more preferably 0.5m3More than/hour and 8m3Below/hour.If aeration quantity is within the above range,
Then having can be fully to the tendency that oxygen is supplied by the plain boiled water circulating system of the aeration of carry out oxygen-containing gas or aqueous systems.If
Aeration quantity exceedes the above-mentioned upper limit, then has the worry for becoming desirable for more massive equipment.If the above-mentioned lower limit of aeration quantity deficiency,
Having aeration becomes insufficient worry.
The aeration time of oxygen-containing gas is also not particularly limited, usually more than 3 minutes and less than 30 days, preferably 4 points
More than clock and less than 20 days.If aeration time is within the above range, with can be fully to by the exposure of carry out oxygen-containing gas
The plain boiled water circulating system or aqueous systems of gas supply the tendency of oxygen.If aeration time exceedes the above-mentioned upper limit, manufacturing cost is had
The worry of rising.If the above-mentioned lower limit of aeration quantity deficiency, having aeration becomes insufficient worry.In addition, aeration can be continuous
Carry out, can also carry out several times.
An example of aeration method is enumerated, there is the aeration of diffuser in the aeration of above-mentioned aeration process using bottom
Groove, utilizes every 1m that the aeration quantity of the diffuser is aeration tank2Unit floor space is 0.5m3More than/hour and 10m3/ hour with
Under.
＜ slime-control agents addition process ＞
In the process, to above-mentioned plain boiled water circulating system and above-mentioned aqueous systems among contained by above-mentioned aeration process
Slime-control agent is added at least one system of the aeration of carrier of oxygen.Work as to above-mentioned plain boiled water circulating system and above-mentioned aqueous systems
In by above-mentioned aeration process carry out oxygen-containing gas aeration at least one system in add slime-control agent, thus with not having
The situation for implementing aeration is compared, and the bacterial population in plain boiled water circulating system can be further reduced, as a result, can further suppress
The generation of corruption slurry.In addition, slime-control agent suppresses the decomposition of the organic matters such as starch contained in plain boiled water, it thus can also suppress rotten
The generation of slurry.
As slime-control agent, it is not particularly limited, for example, can includes：Organic series antibacterial agent, inorganic series antibacterial agent etc..
As organic series antibacterial agent, it is not particularly limited, for example, can includes：Dithiocyano-methane, 5- chloro-2-methyls-
1- isothiazoline -3- ketone, 2- methyl -4- isothiazole -3- ketone, the chloro- 2- n-octyl-isothiazolins -3- ketone of 4,5- bis-, 1,2- benzos
Isothiazoline -3- ketone, 2- n-octyl-isothiazolin -3- ketone, SDD, the bromo- 3- nitrilo-s of 2,2- bis-
The bromo- 2- bromomethyls glutaronitrile of propionamide, 2-, the bromo- 2- nitropropanes -1,3- glycol of 2-, the bromo- 2- nitroethyl alcohols of 2,2- bis-, 1,1-
Two bromo- 1- nitros -2- propyl alcohol, the bromo- 1- nitros -2- acetoxyl groups ethane of 1,1- bis-, the bromo- 1- nitros -2- acetoxyl groups of 1,1- bis-
The bromo- 2- nitros -1,3- diacetoxies propane of propane, 2-, tribromo nitre methane, β-bromo- beta-nitrostyrene, the bromo- 5- nitros of 5- -
Double (acetyl bromide epoxide) ethane of the bromo- 2- methyl-5-nitros -1,3- dioxanes of 1,3- dioxanes, 5-, 1,2-, the double (acetyl bromides of 1,2-
Epoxide) propane, 1,4- double (acetyl bromide epoxide) -2- butylene, di-2-ethylhexylphosphine oxide bromacetate, Bromoacetic acid benzyl ester, N- bromoacetyls
Amine, 2- bromo acetamides, dichloroglyoxime, alpha-chloro benzaldoxime, alpha-chloro benzaldoxime acetic acid esters, 2- (p-hydroxybenzene)
Glyoxyl hydroximic acid chlorine (2- (p-hydroxyphenyl) glyoxylohydroximoyl chloride), triiodo allyl alcohol, 5-
Chloro- 2,4,6- trifluoros isophthalodinitrile, 2,4,5,6- termils, 3,3,4,4- tetrachloro thiophane -1,1- dioxies
Chloro- mercaptan -3- the ketone of 1,2- bis- of compound, 4,5- bis-, hexabromodimethylsulfone, glutaraldehyde, OPA, antiphen, by formula (1)
Quaternary ammonium salt of expression etc..
In above-mentioned chemical formula (1), R1It is straight-chain or carbon number more than 1 and less than 18 alkyl with side chain.3 R1
It is able to can also be differed with identical.R2Be straight-chain or carbon number more than 8 and less than 18 alkyl with side chain, benzyl or
Ethoxy.
It is preferably that can expect DBNPA, 2, the 2- bis- of higher antibacterial effect among these
Bromo- 2- nitroethyl alcohols.
As inorganic series antibacterial agent, it is not particularly limited, for example, can includes：Sodium hypochlorite, postassium hypochlorite, hypochlorous acid
The hypochlorites such as calcium, barium hypochlorite, chlorine dioxide, chlorinated isocyanuric acid, bonding chlorine type compound etc..
Among these, it is however preferred to have appropriate oxidizing force and reactive low sodium hypochlorite, the key of dissolved organic matter
Close chlorine type compound.
Bonding chlorine type compound is generally by making in the chlorine donor and ammonia, ammonium salt, organonitrogen compound of releasing free chlorine
It is any under suitable condition react and generate.As chlorine donor, it is not particularly limited, for example, can uses sodium hypochlorite.
As ammonium salt, for example, it can include：The ammonium halides such as ammonium chloride, ammonium bromide, ammonium sulfate, ammonium nitrate etc., as organic amine, for example may be used
To use sulfamic acid, urea etc..Alternatively, it is also possible to be the compound of generation hypochlorous acid and/or hypobromous acid in water, for example, it can arrange
Enumerate：Chlorine, chlorine dioxide, high test bleaching powder, hypochlorous acid, sodium hypochlorite, postassium hypochlorite, calcium hypochlorite, hypochlorous acid ammonium, hypochlorous acid
Magnesium, hypobromous acid, sodium hypobromite, potassium hypobromite, hypobromous acid calcium, hypobromous acid ammonium, hypobromous acid magnesium, chlorination and/or brominated hydantoins
Class, chlorination and/or bromination isocyanuric acid and its sodium salt, sylvite etc..
Bonding chlorine type compound can be manufactured according to known method, can also be used as ProductName " Fuzzicide "
(Kurita Water Industries Ltd's system) is commercially available." Fuzzicide " is the 1 of ammonium bromide and sodium hypochlorite:1 reactant (rubs
You compare).
Slime-control agent may be used singly or in combination of two or more.In addition, the addition of slime-control agent can
Disposably to carry out, it can also carry out several times.
As slime-control agent to plain boiled water circulating system or the adding method of aqueous systems, it is not particularly limited, Ke Yizhi
Addition slime-control agent is connect, slime-control agent can also be made to dissolve or disperse in a solvent, be used as solution.As above-mentioned
Solvent, is not particularly limited, for example, can include：Water, organic solvent, their mixed solvent etc..
As above-mentioned organic solvent, it is not particularly limited, for example, can includes：
The amide-types such as dimethylformamide, dimethylacetylamide,
The glycols such as ethylene glycol, propane diols, diethylene glycol, DPG, polyethylene glycol；
The glycol ethers such as methyl cellosolve, ethylene glycol monophenyl ether, diethylene glycol monomethyl ether, dipropylene glycol monomethyl ether；
Diethylene glycol monoethyl ether acetic acid esters, ethylene acetate, 2,2,4- trimethyl -1,3- pentanediol diisobutyrates
Deng diol-lipid；
Alcohols of the carbon number below 8；
Methyl acetate, ethyl acetate, butyl acetate, dimethyl maleate, diethylene adipate, ethyl lactate, glutaric acid
Dimethyl ester, dimethyl succinate, repefral, 1,2- dibutoxies ethane, acetic acid -3- methoxybutyls, acetic acid -
The esters such as 2- ethoxy ethyl esters, propene carbonate；
The ketones such as acetone, MEK, methyl iso-butyl ketone (MIBK), isophorone；
The fragrant family solvents such as toluene, dimethylbenzene, 1,2- dimethyl -4- ethylo benzenes；
Dimethyl sulfoxide (DMSO), dioxanes, 1-METHYLPYRROLIDONE etc..
Among these, more polymolecularity, deliquescent water, diethylene glycol monomethyl ether preferably may insure.
The concentration of slime-control agent in solution is not particularly limited, usually more than 1 mass % and below 40 mass %,
Preferably more than 2 mass % and below 30 mass %.When concentration within the above range when, with can fully divide in a solvent
Dissipate or dissolve the tendency of slime-control agent.If concentration exceedes the above-mentioned upper limit, corruption can not fully be disperseed or dissolve by having
Starch the worry of controlling agent.If the not enough above-mentioned lower limit of concentration, can a large amount of solvents in need worry.
Slime-control agent is to plain boiled water circulating system or the addition of aqueous systems (to plain boiled water circulating system and aqueous systems
Both sides addition slime-control agent in the case of, relative to the addition of the system of one of which) be not particularly limited, with solid
Composition conversion is counted, usually more than 0.1mg/L and below 1000mg/L, preferably more than 1mg/L and below 100mg/L.When adding
Dosage within the above range when, the tendency with the generation that can be adequately suppressed rotten slurry.If addition exceedes the above-mentioned upper limit,
Have the worry for causing manufacturing cost to rise.If the above-mentioned lower limit of addition deficiency, the load for the generation that can not suppress rotten slurry is had
The heart.
The time added from Air Exposure to slime-control agent is not particularly limited, preferably more than 0 minute and 30 points
Below clock.If from Air Exposure to slime-control agent add time more than 30 minutes when, having makes bacterium class active again
Change, bred, reducing substances it is increased worry.
Fig. 1 is the figure for a mode for representing the copy paper process of the present invention.Hereinafter, for dialogue water cycle system and water
Any one of system or both carries out the aeration of oxygen-containing gas, and plain boiled water circulating system and above-mentioned water body are stated further up
The step of slime-control agent being added at least one system for the aeration for carrying out oxygen-containing gas among system by above-mentioned aeration process,
Concrete example is enumerated to illustrate.It should be noted that in the following, illustrating respectively：Dialogue water cycle system carries out oxygen-containing gas
Aeration and to the plain boiled water circulating system add slime-control agent situation (the 1st method) and to aqueous systems carry out it is oxygenous
The aeration of body and the situation (the 2nd method) that slime-control agent is added to the aqueous systems.
(the 1st method)
First, when dialogue water cycle system 22 carries out the aeration of oxygen-containing gas and adds rotten slurry to the plain boiled water circulating system 22
During controlling agent, plain boiled water 10 is aerated with oxygen-containing gas in the grade of aeration tank 17.Then, by the starting pulps slurry of trough 2
Mixed with the plain boiled water 10 from aeration tank 17.Afterwards, slime-control agent 18 etc. is added to above-mentioned plain boiled water 10, is passed through using fan pump 3
Cross silk screen 4 and be sent to entrance 5.The starting pulps slurry for being sent to entrance 5 is supplied to wire section (wire part) 6, is taken off
Water.Moistening sheet material 7 after dehydration is sent to drying section 9 by press section 8.Plain boiled water 10 after being separated by above-mentioned wire section 6 is stored to
Plain boiled water silo 11 a, part is stored to aeration tank 17 etc. again, is aerated as described above.
In addition, when dialogue water cycle system 22 carries out the aeration of oxygen-containing gas and adds rotten slurry to the plain boiled water circulating system 22
During controlling agent, the aqueous systems 19 for being directed into above-mentioned plain boiled water circulating system 22 can also be implemented with aeration in aeration tank 20, also may be used
To add slime-control agent 21 (the 2nd aeration process and the 2nd slime-control agent addition process).
The aerations of aqueous systems 19, the method for addition are not particularly limited, for example can according to plain boiled water circulating system 22
The same method of aeration method, adding method is carried out.
(the 2nd method)
On the other hand, when to aqueous systems 19 carry out oxygen-containing gas aeration and to the aqueous systems 19 add slime-control agent
When, have in bottom in the aeration tank 20 of diffuser, the aqueous systems 19 for being directed into plain boiled water circulating system 22 are entered with oxygen-containing gas
Row aeration.After the aqueous systems 19 are mixed with the plain boiled water 10 from plain boiled water silo 11, the raw material with trough (machine tank) 2
Pulp is mixed.Then, slime-control agent 21 is added to aeration tank 20, entrance is sent to by silk screen 4 using fan pump 3
5.The starting pulps slurry for being sent to entrance 5 is supplied to wire section 6, is dehydrated.Moistening sheet material 7 after dehydration is by squeezing
Portion 8 is sent to drying section 9.Plain boiled water 10 after being separated by above-mentioned wire section 6 is stored to plain boiled water silo 11, circulates plain boiled water 10.
In addition, when to aqueous systems 19 carry out oxygen-containing gas aeration and to the aqueous systems 19 add slime-control agent when, it is excellent
Elect as and oxygen-containing gas is aerated in the grade of aeration tank 17, or addition slime-control agent 18 etc..
That is, process (the 2nd aeration preferably further with the aeration that oxygen-containing gas is carried out to above-mentioned plain boiled water circulating system 22
Process).By also carrying out the aeration of oxygen-containing gas to above-mentioned plain boiled water circulating system 22, it synergistically can further suppress rotten slurry
Generation.
Additionally, it is preferred that further having process (the 2nd rotten slurry control that slime-control agent is added to above-mentioned plain boiled water circulating system 22
Preparation adds process).By also adding slime-control agent to above-mentioned plain boiled water circulating system 22, it synergistically can further suppress rotten
The generation of slurry.
The aeration of plain boiled water circulating system 22, the method for addition are not particularly limited, for example can according to aqueous systems 19
The same method of aeration method, adding method is carried out.
＜ mensuration operations ＞
Corruption slurry suppressing method preferably further has being selected from by oxidation-reduction potential, Asia to above-mentioned plain boiled water circulating system
The process that at least one project in the measure project team of sulfate ion concentration and dissolved oxygen content composition is measured.Based on logical
The measurement result that the mensuration operation is obtained is crossed, the rotten slurry that process is added to the aeration quantity and/or slime-control agent for being aerated process is controlled
Preparation addition is controlled, so as to more stable and the effectively rotten slurry of suppression generation.
Specifically, the rotten slurry control of the aeration quantity of the above-mentioned aeration process of preferred pair and/or slime-control agent addition process
Agent addition is adjusted, dense as more than -150mV, sulfurous acid ion using the oxidation-reduction potential for becoming plain boiled water circulating system
Spend for 2.0mgSO3 -/ below L and dissolved oxygen content for more than 1mg/L it is any at least one., can be with by being so adjusted
More effectively suppress the generation of rotten slurry.
Above-mentioned oxidation-reduction potential is preferably regulated as more than -150mV, be more preferably adjusted to more than -100mV and 500mV with
Under.If microorganism pollution is aggravated, it is consumed the oxygen in system, then oxidation-reduction potential is easily reduced, but when redox electricity
Position within the above range when, become abundant with the oxygen amount in plain boiled water circulating system, can effectively suppress the generation of rotten slurry
Tendency.If oxidation-reduction potential exceedes the above-mentioned upper limit, have the oxygen amount in plain boiled water circulating system and exceed aequum and became
The worry of amount.If the above-mentioned lower limit of oxidation-reduction potential deficiency, the worry for the generation that can not suppress rotten slurry is had.
As the assay method of oxidation-reduction potential, it is not particularly limited, for example, can includes：Potentiometry, electricity
Potential difference titration etc..
Above-mentioned sulfurous acid ion concentration is preferably regulated as 2.0mgSO3 -/ below L, is more preferably adjusted to 1.5mgSO3 -/ L with
Under.When sulfurous acid ion concentration within the above range when, fully subtract with the sulfurous acid ion concentration in plain boiled water circulating system
Few tendency.If sulfurous acid ion concentration exceedes the above-mentioned upper limit, have reducing substances can not fully reduction worry.
Sulfurous acid ion concentration can be according to JIS K 0102:2008 are measured.
Above-mentioned dissolved oxygen content is preferably regulated as more than 1mg/L, is more preferably adjusted to more than 5mg/L and below 100mg/L.When
Dissolved oxygen content within the above range when, the oxygen amount in plain boiled water circulating system becomes abundant, with can effectively suppress rotten slurry
The tendency of generation.If dissolved oxygen content exceedes the above-mentioned upper limit, have the oxygen amount in plain boiled water circulating system and exceed aequum and become
Excessive worry.If the above-mentioned lower limit of dissolved oxygen content deficiency, the worry for the generation that can not suppress rotten slurry is had.Dissolved oxygen content can be with
It is measured using dissolved oxygen analyzer,.
In addition, viable count is not particularly limited, usually 1 × 107Below CFU/mL, preferably 1 × 106Below CFU/mL.
If viable count exceedes the above-mentioned upper limit, the worry for the generation that can not suppress rotten slurry is had.
Viable count be represent by the use of colony counting method calculate, using the water of the cooling water system as etch-proof object as
Microbial source, by the value of the number of a certain amount of the formed bacterium colony of the water.In addition can also be by utilizing absorbance/turbidity
The viable count that determination method, gravimetry etc. are obtained is represented.
As colony counting method, it is not particularly limited, for example, can includes：Plating method, capillary tube method, membrane filtration
Device method etc..
Sterilizing rate is not particularly limited, usually more than 99.5%, preferably more than 99.9%.If sterilizing rate deficiency is above-mentioned
Lower limit, then have the worry for the generation that can not suppress rotten slurry.
Mensuration operation can also be carried out by determining other parameters.As other parameters, it is not particularly limited, example
It can such as include：The indexs such as calcium ion amount, electrical conductivity, concentration of glucose, starch concentration, PH, turbidity.
The other ＞ of ＜
The others process conditions such as temperature, pressure, time, equipment in each operation are not particularly limited, can be according to making
Suitably set with raw material etc..The number of stages of each operation is also not particularly limited, and can be carried out with 1 stage, can also be with multiple
Stage is carried out.Raw material, the quantitative or qualitative of product method can be carried out according to known to NMR, IR, elementary analysis, mass spectrum etc..
In addition, the raw material used can be used alone, plurality of raw materials can also be combined and used.
According to the present invention it is possible to life that is abundant and simply suppressing the rotten slurry in the plain boiled water circulating system of copy paper process
Into.Therefore, in the copy paper process in paper processed, suppressing method compatibly can be starched using the corruption.In addition, in copy paper process,
Reduction or recycling, the reduction of new water usage amount, the reduction of drainage sunk well of the usage amount of slime-control agent etc. can be realized.
Embodiment
Hereinafter, the present invention is illustrated by embodiment in further detail, but the invention is not restricted to these embodiments.Need
Bright, in embodiment and comparative example, measure is carried out by following methods.
＜ oxidation-reduction potentials (ORP) ＞
Oxidation-reduction potential (mV) uses oxidation-reduction potentiometer (the Dongxing chemistry strain formula meeting that make use of potentiometry
Society manufactures) it is measured.
＜ sulfurous acid ion concentration ＞
Sulfurous acid ion concentration (mgSO3 -/ L) according to JIS K 0102:2008 are measured.Specifically, in measuring bottle
Appropriate sample is taken, pararosaniline solution, formalin and mercuric chloride solution is added, it is developed the color.Stand 20 minutes it
Afterwards, the blank solution another equally prepared carries out colorimetric as control under 572nm, is asked as sulfurous acid ion concentration
.
＜ dissolved oxygen contents ＞
Dissolved oxygen content (mg/L) uses septum electrode formula dissolved oxygen analyzer, (Orbisphere Company Ltd. manufactures)
It is measured.
＜ viable counts ＞
For viable count (CFU/mL), dilution is a certain amount of abundant with the agar medium containing nutritional ingredient by its by inspection water
Ground is mixed, after flat board culture one day, calculates generated clump count.
＜ sterilizing rates ＞
Sterilizing rate (%) is calculated using following formula.
Sterilizing rate (%)=((viable count of before processing)-(viable count after processing))/(viable count of before processing) × 100
＜ bactericidal effects ＞
Bactericidal effect is judged according to following metewand.
◎：Sterilizing rate is more than 99.9%
○：Sterilizing rate is more than 99.5% and less than 99.9%
△：Sterilizing rate is more than 90% and less than 99.5%
×：Sterilizing rate is less than 90%
＜ corruption slurry inhibitions ＞
Corruption slurry inhibition is judged according to following metewand.
◎：Attachment without corruption slurry
○：The thickness of corruption slurry is less than 0.1mm
△：The thickness of corruption slurry is for more than 0.1mm and less than 0.5mm
×：The thickness of corruption slurry is more than 0.5mm
(preparation A)
12% sodium hypochlorite is prepared as preparation A.
(preparation B)
Make ammonium bromide and sodium hypochlorite in molar ratio 1:1 reaction, modulation preparation B.
(formulation C)
It is compounded 20 mass parts 2, the bromo- 3- cyano propionamides (DBNPA) of 2- bis- and 80 mass parts diethylene glycol monomethyl ethers, modulation
Formulation C.
(preparation D)
It is compounded 20 mass parts 2, the bromo- 2- nitroethyl alcohols (DBNE) of 2- bis- and 80 mass parts diethylene glycol monomethyl ethers, modulation system
Agent D.
(embodiment 1, comparative example 13)
Using the plain boiled water collected by paper machine, determine oxidation-reduction potential, sulfurous acid ion concentration, dissolved oxygen content and
Viable count.The oxidation-reduction potential of the plain boiled water of before processing is -388mV, and sulfurous acid ion concentration is 8.8mgSO3 -/ L, dissolved oxygen content
Less than 0.1mg/L, viable count is 3.8 × 108CFU/mL.The plain boiled waters that are collected by paper machine of collection 2L, using diffuser with
300mL/ minutes (equivalent to every 1m2Unit floor space is 1m3/ hour) flow carry out 5 minutes air aeration.Afterwards, according to
Slime-control agent is added in the way of active ingredient densimeter reaches normal concentration, oxidation-reduction potential, Asia are determined after 10 minutes
Sulfate ion concentration, dissolved oxygen content and viable count (embodiment 1).In addition, except it is no addition slime-control agent (preparation) with
Outside, operate similarly to Example 1, determine oxidation-reduction potential, sulfurous acid ion concentration, dissolved oxygen content and viable count (ratio
Compared with example 13).The sterilizing rate of embodiment 1 is calculated by the viable count of before processing and the viable count of embodiment 1.In addition, evaluating sterilized effect
Really.
(embodiment 2~12)
In addition to the species and addition concentration of slime-control agent (preparation) are set to shown in table 1, similarly to Example 1
Operation, determines oxidation-reduction potential, sulfurous acid ion concentration, dissolved oxygen content, viable count and sterilizing rate.
(comparative example 1)
Except without implement Air Exposure, the species of slime-control agent (preparation) and addition concentration be set to shown in table 1 with
Outside, operate similarly to Example 1, determine oxidation-reduction potential, sulfurous acid ion concentration, dissolved oxygen content, viable count and kill
Bacterium rate (comparative example 1).The sterilizing rate of comparative example 1 is calculated by the viable count of before processing and the viable count of comparative example 1.In addition, evaluating
Bactericidal effect.
(comparative example 2~12)
In addition to the species and addition concentration of slime-control agent (preparation) are set to shown in table 1, in the same manner as comparative example 1
Operation, determines oxidation-reduction potential, sulfurous acid ion concentration, dissolved oxygen content, viable count and sterilizing rate.In addition, evaluating sterilized
Effect.
[table 1]
(embodiment 13, comparative example 18)
Using the plain boiled water collected by paper machine, determine oxidation-reduction potential, sulfurous acid ion concentration, dissolved oxygen content and
Viable count (mensuration operation).The oxidation-reduction potential of the plain boiled water of before processing is -361mV, and sulfurous acid ion concentration is 8.8mgSO3 -/
L, dissolved oxygen content is less than 0.1mg/L, and viable count is 4.0 × 108CFU/mL.Using the plain boiled water collected by paper machine, in bottom
In aeration tank with diffuser, with every 1m2Unit area is 5m3The aeration quantity of/hour, uses the mouth at every 10cm with 2mm
The diffuser in footpath, is aerated (aeration process) using air to plain boiled water.Bleached hardwood kraft pulp and deinking will be used
Paper pulp is mixed as the starting pulps slurry of the trough of starting pulps with the plain boiled water from aeration tank.Into above-mentioned plain boiled water with
100mg/L ratio addition preparation A (slime-control agent addition process), entrance is sent to using fan pump by silk screen.It is sent to
The starting pulps slurry of entrance is supplied to wire section, is dehydrated.Moistening sheet material after dehydration is sent to drying section by press section.
The plain boiled water separated by wire section is stored to plain boiled water silo, and a part is stored to aeration tank, exposed as described above again
Gas (plain boiled water circulating system).After 14 days, oxidation-reduction potential, sulfurous acid ion concentration, dissolved oxygen content and the work of plain boiled water are determined
Bacterium number (embodiment 13).In addition, confirming the rotten slurry adhesion amount in the pipeline of plain boiled water circulating system by visual observation.On the other hand, remove
Beyond addition slime-control agent (preparation), operate similarly to Example 13, determine oxidation-reduction potential, sulfurous acid from
Sub- concentration, dissolved oxygen content and viable count (comparative example 18).Reality is calculated by the viable count of before processing and the viable count of embodiment 13
Apply the sterilizing rate of example 13.
(embodiment 14~16)
In addition to the species and addition concentration of slime-control agent (preparation) are set to shown in table 2, similarly to Example 13
Ground is operated, and determines oxidation-reduction potential, sulfurous acid ion concentration, dissolved oxygen content, viable count and sterilizing rate.In addition, passing through mesh
Rotten slurry adhesion amount in pipeline depending on confirming plain boiled water circulating system.
(comparative example 14~17)
Except without implement Air Exposure, the species of slime-control agent (preparation) and addition concentration be set to shown in table 2 with
Outside, operate similarly to Example 13, determine oxidation-reduction potential, sulfurous acid ion concentration, dissolved oxygen content and viable count (ratio
Compared with example 14~17).The rotten slurry adhesion amount in the pipeline of plain boiled water circulating system is confirmed by visual observation.By before processing viable count with than
Viable count compared with example 14~17 calculates the sterilizing rate of comparative example 14~17.
[table 2]
(embodiment 17, comparative example 23)
Using the plain boiled water collected by paper machine, determine oxidation-reduction potential, sulfurous acid ion concentration, dissolved oxygen content and
Viable count (mensuration operation).The oxidation-reduction potential of the plain boiled water of before processing is -387mV, and sulfurous acid ion concentration is 9.0mgSO3 -/
L, dissolved oxygen content is less than 0.1mg/L, and viable count is 4.1 × 108CFU/mL.Have in bottom in the aeration tank of diffuser, with every
1m2Unit area is 2m3The aeration quantity of/hour, using the diffuser of the bore with 2mm at every 10cm, is utilized in aeration tank
Air is aerated (aeration process) to the aqueous systems for being directed into plain boiled water circulating system.By aqueous systems with from the white of plain boiled water silo
After water mixing, starched with using bleached hardwood kraft pulp and de inked pulp as the starting pulps of the trough of starting pulps
Material is mixed.Into above-mentioned aeration tank with 100mg/L ratio addition preparation A (slime-control agent addition process), punching is utilized
Stock pump is sent to entrance by silk screen.The starting pulps slurry for being sent to entrance is supplied to wire section, is dehydrated.After dehydration
Moistening sheet material is sent to drying section by press section.The plain boiled water separated by wire section is stored to plain boiled water silo, plain boiled water is circulated (plain boiled water
Circulating system).After 14 days, oxidation-reduction potential, sulfurous acid ion concentration, dissolved oxygen content and the viable count of plain boiled water are determined.Separately
Outside, the rotten slurry adhesion amount (embodiment 17) in the pipeline of plain boiled water circulating system is confirmed by visual observation.On the other hand, except not adding
Plus beyond slime-control agent (preparation), operate similarly to Example 17, determine oxidation-reduction potential, sulfurous acid ion concentration,
Dissolved oxygen content and viable count (comparative example 23).Embodiment 17 is calculated by the viable count of before processing and the viable count of embodiment 17
Sterilizing rate.
(embodiment 18~24, comparative example 24)
In addition to aeration quantity, the species of slime-control agent (preparation) and addition concentration are set to shown in table 3, with embodiment
17 similarly operate, and determine oxidation-reduction potential, sulfurous acid ion concentration, dissolved oxygen content, viable count and sterilizing rate.In addition,
The rotten slurry adhesion amount in the pipeline of plain boiled water circulating system is confirmed by visual observation.
(comparative example 19~22)
Except without implement Air Exposure, the species of slime-control agent (preparation) and addition concentration be set to shown in table 3 with
Outside, operate similarly to Example 17, determine oxidation-reduction potential, sulfurous acid ion concentration, dissolved oxygen content and viable count.Separately
Outside, the rotten slurry adhesion amount in the pipeline of plain boiled water circulating system is confirmed by visual observation.By before processing viable count and comparative example 19~
22 viable count calculates the sterilizing rate of comparative example 19~22.
[table 3]
It can be seen from 1~table of table 3, embodiment data are compared with the data of comparative example, bactericidal effect and rotten slurry inhibition
Improve.It should be noted that in 1~table of table 3, the aE+b that viable count is related to represents a × 10bThe meaning.
Industrial applicability
According to the present invention it is possible to life that is abundant and simply suppressing the rotten slurry in the plain boiled water circulating system of copy paper process
Into.Therefore, in the copy paper process in paper processed, suppressing method compatibly can be starched using the corruption.
Description of reference numerals
1 raw material manufacturing process
2 troughs
3 fan pumps
4 silk screens
5 entrances
6 wire sections
7 moistening sheet materials
8 press sections
9 drying sections
10 plain boiled waters
11 plain boiled water silos
12 slime-control agents
13 aeration tanks
14 slime-control agents
15 equipment for separating liquid from solid
Raw material system is discharged or be recovered to solid constituent by 16
17 aeration tanks
18 slime-control agents
19 are directed into the aqueous systems of plain boiled water circulating system
20 aeration tanks
21 slime-control agents
22 plain boiled water circulating systems
23 fan pumps
24 fan pumps
25 fan pumps
26 fan pumps
Claims (10)
1. a kind of rotten slurry suppressing method, it is characterised in that it is the rotten slurry suppression side in the plain boiled water circulating system of copy paper process
Method, with following process：
The aeration process of the aeration of oxygen-containing gas is carried out to the plain boiled water circulating system；And
The process that slime-control agent is added into the plain boiled water circulating system,
Using the aeration tank in bottom with diffuser in the aeration of the aeration process, it is using the aeration quantity of the diffuser
Every 1m of aeration tank2Unit floor space is 0.5m3More than/hour and 10m3Below/hour,
The slime-control agent addition that the slime-control agent adds process is adjusted, so that the oxidation of plain boiled water circulating system
Reduction potential is more than -150mV and below 500mV.
2. rotten slurry suppressing method according to claim 1, wherein, the aeration quantity of the aeration process is adjusted, with
The sulfurous acid ion concentration for making the plain boiled water circulating system is 2.0mgSO3 -/ below L.
3. rotten slurry suppressing method according to claim 1, its further have to the plain boiled water circulating system be selected from by
At least one project in the measure project team of oxidation-reduction potential, sulfurous acid ion concentration and dissolved oxygen content composition is surveyed
Fixed mensuration operation,
Based on the measurement result obtained by the mensuration operation, the slime-control agent that process is added to the slime-control agent is added
Amount is adjusted.
4. rotten slurry suppressing method according to claim 3, based on the measurement result obtained by said determination process, to institute
The aeration quantity for stating aeration process is adjusted.
5. a kind of rotten slurry suppressing method, it is characterised in that it is the rotten slurry suppression side in the plain boiled water circulating system of copy paper process
Method, with following process：
The process that the aqueous systems for being directed into the plain boiled water circulating system are carried out with the aeration of oxygen-containing gas；And
The process that slime-control agent is added into the aqueous systems.
6. rotten slurry suppressing method according to claim 5, its further have to the plain boiled water circulating system be selected from by
At least one project in the measure project team of oxidation-reduction potential, sulfurous acid ion concentration and dissolved oxygen content composition is surveyed
Fixed mensuration operation,
Based on the measurement result obtained by the mensuration operation, work is added to the aeration quantity and/or slime-control agent for being aerated process
The slime-control agent addition of sequence is controlled.
7. rotten slurry suppressing method according to claim 6, wherein, the aeration quantity and/or rotten slurry of the aeration process are controlled
The slime-control agent addition of preparation addition process is adjusted, so that the oxidation-reduction potential of plain boiled water circulating system is -150mV
Above, sulfurous acid ion concentration is 2.0mgSO3 -/ below L and dissolved oxygen content for more than 1mg/L it is any at least one.
8. the rotten slurry suppressing method according to any one of claim 5~7, wherein, in the aeration of the aeration process
Using the aeration tank in bottom with diffuser, every 1m that the aeration quantity of the diffuser is aeration tank is utilized2Unit floor space is
0.5m3More than/hour and 10m3Below/hour.
9. the rotten slurry suppressing method according to any one of claim 5~7, it also has to enter the plain boiled water circulating system
The process of the aeration of row oxygen-containing gas.
10. the rotten slurry suppressing method according to any one of claim 5~7, it also has to the plain boiled water circulating system
The process for adding slime-control agent.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013144051A JP6002095B2 (en) | 2013-07-09 | 2013-07-09 | Slime control method |
| JP2013144052A JP5952230B2 (en) | 2013-07-09 | 2013-07-09 | Slime control method |
| JP2013-144052 | 2013-07-09 | ||
| JP2013-144051 | 2013-07-09 | ||
| PCT/JP2014/068365 WO2015005404A1 (en) | 2013-07-09 | 2014-07-09 | Slime control method |
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| CN105378178B true CN105378178B (en) | 2017-07-11 |
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| EP (1) | EP3020862B1 (en) |
| KR (1) | KR101793979B1 (en) |
| CN (1) | CN105378178B (en) |
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| JP6809786B2 (en) * | 2015-12-14 | 2021-01-06 | アクアス株式会社 | Slime control method in the papermaking process |
| JP6569758B1 (en) * | 2018-03-14 | 2019-09-04 | 栗田工業株式会社 | Pitch failure prevention method |
| JP6933237B2 (en) * | 2019-11-12 | 2021-09-08 | 栗田工業株式会社 | Suspended solids deposition suppression method, pitch failure suppression method and suspended solids deposition detection method |
| JP6954387B2 (en) * | 2020-02-14 | 2021-10-27 | 栗田工業株式会社 | Continuous measurement method and equipment for starch concentration in water |
| JP6939949B1 (en) * | 2020-05-22 | 2021-09-22 | 栗田工業株式会社 | Method of suppressing hydrogen sulfide generation in the aquarium |
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| JP2003164882A (en) * | 2001-11-29 | 2003-06-10 | Kurita Water Ind Ltd | Antibacterial method for industrial water system containing reducing substance |
| CN1702236A (en) * | 2004-05-25 | 2005-11-30 | Hsp销售株式会社 | Sterilizing and deodorizing method for paper making water and slime pulp controlling agent used thereby |
| JP2009085960A (en) * | 2008-10-20 | 2009-04-23 | Somar Corp | Method and system for controlling addition of medical agent |
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| JP4299397B2 (en) * | 1999-03-08 | 2009-07-22 | 伯東株式会社 | Slime control method |
| JP2003326150A (en) * | 2002-05-10 | 2003-11-18 | Kurita Water Ind Ltd | Hydrothermal reaction method and apparatus thereof |
| JP4666275B2 (en) * | 2003-03-12 | 2011-04-06 | 栗田工業株式会社 | Treatment method for wastewater containing sulfite ions |
| WO2006137183A1 (en) * | 2005-06-22 | 2006-12-28 | Hsp Hanbai Kabushiki Kaisha | Method of papermaking |
| JP2008194609A (en) * | 2007-02-13 | 2008-08-28 | Jfe Steel Kk | Treatment method for wastewater containing sulfur-based cod component |
| JP2009095742A (en) * | 2007-10-16 | 2009-05-07 | Nisshin Kagaku Kenkyusho:Kk | Method for preventing slime and system for adding halogen-based disinfectant |
| JP4876094B2 (en) * | 2008-03-31 | 2012-02-15 | ソマール株式会社 | Slime control method and apparatus |
| JP5233498B2 (en) | 2008-08-19 | 2013-07-10 | 栗田工業株式会社 | Biological treatment method and apparatus for water containing organic matter |
| JP5357524B2 (en) | 2008-12-03 | 2013-12-04 | ソマール株式会社 | Slime control method in papermaking process |
| JP2011226043A (en) * | 2010-03-31 | 2011-11-10 | Kurita Water Ind Ltd | Method for suppressing generation of slime |
| WO2012070644A1 (en) * | 2010-11-25 | 2012-05-31 | 栗田工業株式会社 | Method for producing paper |
| JP5958076B2 (en) * | 2012-05-22 | 2016-07-27 | 栗田工業株式会社 | Microbial control method in water system containing reducing substances |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003164882A (en) * | 2001-11-29 | 2003-06-10 | Kurita Water Ind Ltd | Antibacterial method for industrial water system containing reducing substance |
| CN1702236A (en) * | 2004-05-25 | 2005-11-30 | Hsp销售株式会社 | Sterilizing and deodorizing method for paper making water and slime pulp controlling agent used thereby |
| JP2009085960A (en) * | 2008-10-20 | 2009-04-23 | Somar Corp | Method and system for controlling addition of medical agent |
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| ES2716891T3 (en) | 2019-06-17 |
| EP3020862A1 (en) | 2016-05-18 |
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| WO2015005404A1 (en) | 2015-01-15 |
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