NO132275B - - Google Patents
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- NO132275B NO132275B NO71773A NO71773A NO132275B NO 132275 B NO132275 B NO 132275B NO 71773 A NO71773 A NO 71773A NO 71773 A NO71773 A NO 71773A NO 132275 B NO132275 B NO 132275B
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- Prior art keywords
- waste water
- water
- polyether
- resin
- molecular weight
- Prior art date
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- 239000002351 wastewater Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 24
- 229920001568 phenolic resin Polymers 0.000 claims description 24
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 22
- 229920000570 polyether Polymers 0.000 claims description 17
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 13
- 239000003344 environmental pollutant Substances 0.000 claims description 8
- 231100000719 pollutant Toxicity 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 229920003043 Cellulose fiber Polymers 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 239000005011 phenolic resin Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 238000005054 agglomeration Methods 0.000 description 7
- 230000002776 aggregation Effects 0.000 description 7
- 244000144992 flock Species 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 238000005188 flotation Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920000867 polyelectrolyte Polymers 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 239000000123 paper Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011094 fiberboard Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 poly-alkylene ethers Chemical class 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 241000239366 Euphausiacea Species 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 1
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- SLGWESQGEUXWJQ-UHFFFAOYSA-N formaldehyde;phenol Chemical compound O=C.OC1=CC=CC=C1 SLGWESQGEUXWJQ-UHFFFAOYSA-N 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 229920000233 poly(alkylene oxides) Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Paper (AREA)
Description
Nærværende oppfinnelse vedrorer en ny fremgangsmåte for separasjon av faste og ioste stoffer fra avlopsvann. Fortrinnsvis kan fremgangsmåten anvendes for rensing av prosessvann i fiber-bearbeidende industrier, f.eks. innen papir- og fiberplate^ industrien. Fra disse industrier erholdes store mengder avlopsvann som medforer finfibermaterialer, såkalt kryll eller nullfibrer, rester av fylningsmidler, f.eks. kaolin, og dessuten en mengde loselige bestanddeler, f.eks. hemicellulose og spaltningsprodukter av lignin. The present invention relates to a new method for the separation of solid and frozen substances from waste water. Preferably, the method can be used for cleaning process water in fiber-processing industries, e.g. within the paper and fiber board^ industry. Large quantities of waste water are obtained from these industries, which carry fine fiber materials, so-called krill or zero fibres, residues of fillers, e.g. kaolin, and also a quantity of soluble constituents, e.g. hemicellulose and breakdown products of lignin.
Flere metoder er kjente for utflokkulering av de forskjellige forurensningene av avlopsvann av nevnte type, f.eks. med aluminiumsulfat med eller uten tilsetning av syntetiske polyelektrolytter, eller med polymerer av naturlig opprinnelse, f.eks. benlim. I det amerikanske patentet 3 141 186 beskrives en rensningsf rémgangsmåte for avlopsvann fra papir fremstilling, hvorved man anvender polyetylenoksyd som flokkningsmiddel. Several methods are known for the flocculation of the various contaminants of waste water of the aforementioned type, e.g. with aluminum sulphate with or without the addition of synthetic polyelectrolytes, or with polymers of natural origin, e.g. leg glue. In US patent 3,141,186, a purification process for waste water from paper manufacturing is described, whereby polyethylene oxide is used as flocculant.
Det er også kjent fra det svenske patentskriftet 223 094 at It is also known from the Swedish patent document 223 094 that
man ved hjelp av en fenol-formaldehydharpiks kan utflokkulere fore-kommende forurensninger i avlopsvann. Denne metode har vist seg å være spesielt attraktiv for anvendelse innen fiberplate-tilvirkningsindustrien hvor man kan resirkulere det utflokkulerte slammet til tilvirkningsprosessen, og hvor fenolharpiksen også fungerer som et bindemiddel i fiberplaten. you can use a phenol-formaldehyde resin to flocculate existing pollutants in waste water. This method has proven to be particularly attractive for use in the fiberboard manufacturing industry, where the flocculated sludge can be recycled for the manufacturing process, and where the phenolic resin also acts as a binder in the fiberboard.
Prosessen ifolge dette patent utfores på en slik måte at en fenol-formaldehydharpiks tilsettes til prosessvannet i alkalisk miljo, hvorved fenolharpiksen befinner seg i vannloselig form. Deretter senkes pH med f.eks. eri aluminiumsulfatlosning inntil fenolharpiksen ikke lenger er vannloselig. Herved faller fenolharpiksen ut og trekker derved med seg annet suspendert materiale i utfellingen. De dannede flokkene kan, siden fraskilles på kjent måte, f.eks. ved hjelp av sedimentasjon eller flokkasjon. The process according to this patent is carried out in such a way that a phenol-formaldehyde resin is added to the process water in an alkaline environment, whereby the phenol resin is in a water-soluble form. The pH is then lowered with e.g. eri aluminum sulfate solution until the phenolic resin is no longer water soluble. In this way, the phenolic resin precipitates and thereby drags other suspended material with it in the precipitate. The formed flocks can then be separated in a known manner, e.g. by means of sedimentation or flocculation.
For å påskynde sedimentasjonen eller flottasjonen tilsettes vanligvis polyelektrolytter såsom polyakrylamider, polyakrylater, polyetyleniminer etc. eller kationisk stivelse, hvorved flokkene agglomerer. To speed up the sedimentation or flotation, polyelectrolytes such as polyacrylamides, polyacrylates, polyethyleneimines etc. or cationic starch are usually added, whereby the flocks agglomerate.
Effekten av denne metoden er dog meget varierende avhengig av de såvel kvantitative som kvalitative variasjonene av i prosessvannet loste eller suspenderte substanser. Også variasjoner i konsentrasjonen av metallioner i vannet, f.eks. aluminium eller natrium, påvirker resultatet. Det virker dessuten som om agglomeringen er avhengig av vannets temperatur. The effect of this method is, however, highly variable depending on the quantitative as well as qualitative variations of dissolved or suspended substances in the process water. Also variations in the concentration of metal ions in the water, e.g. aluminum or sodium, affects the result. It also seems as if the agglomeration is dependent on the temperature of the water.
Syntetiske polyelektrolytter er dyre og ofte mindre effektive. Kationisk stivelse er vanskelig håndterbar p.g.a. at losningen må tilberedes hver dag. Lagringsdyktigheten for en slik losning har vist seg å være ca. 24 timer. Hvis denne tid overskrides^Synthetic polyelectrolytes are expensive and often less efficient. Cationic starch is difficult to handle due to that the solution must be prepared every day. The storability of such a solution has been shown to be approx. 24 hours. If this time is exceeded^
i så minsker agglomereringseffekten. in this way the agglomeration effect decreases.
Ifolge nærværende fremgangsmåte elimineres de ovenfor nevnte vanskeligheter. Med nærværende fremgangsmåte forenkles systemet, driftssikkerheten okes og investeringsomkostningene samt omkostningene i forbindelse med kjemikaliene blir lavere. According to the present method, the above-mentioned difficulties are eliminated. With the present method, the system is simplified, operational reliability is increased and the investment costs as well as the costs in connection with the chemicals are lower.
Ifolge oppfinnelsen har det overraskende vist seg at agglomerering av fenolformaldehydflokkene betydelig forbedres når man anvender en vannlosning av en hoymolekylær polyeter i kombinasjon med f en olharp i ks en. According to the invention, it has surprisingly been shown that agglomeration of the phenol formaldehyde flocks is significantly improved when a water solution of a high molecular weight polyether is used in combination with f en olharp i ks en.
Fremgangsmåte ifolge oppfinnelsen kan anvendes for alle avlopsvann hvor fenolharpikser anvendes som flokningsmiddel. Fortrinnsvis gjennomfores fremgangsmåten ifolge oppfinnelsen på avlopsvann som inneholder lignocellulosefibrer. The method according to the invention can be used for all waste water where phenolic resins are used as flocculants. Preferably, the method according to the invention is carried out on waste water containing lignocellulose fibres.
Polyeteren bevirker en nesten momentan agglomerering av fore-kommende flokker til store godt sammenbundne aggregater, hvilke er meget godt egnet for spesielt flotasjon, men som også, hvis onsket, kan sedimenteres. The polyether causes an almost instantaneous agglomeration of occurring flocks into large well-connected aggregates, which are very well suited for special flotation, but which can also, if desired, be sedimented.
Med momentan agglomerering menes at forurensningene i avløps-vannet på meget kort tid utfelles i vannet, hvorved de nevnte forurensninger således kan fjernes, og hvorved man får en klar vannfase. P.g.a. at den totale tiden for utfellingen av forurensningene er meget kort, medforer dette den fordelen at utfellingsutrustningen kan gjores relativt liten og folgelig også billig. Instantaneous agglomeration means that the pollutants in the waste water are precipitated in the water in a very short time, whereby the mentioned pollutants can thus be removed, and whereby a clear water phase is obtained. Because of. that the total time for the precipitation of the pollutants is very short, this entails the advantage that the precipitation equipment can be made relatively small and consequently also cheap.
Dette overraskende positive resultat forklares med at polyeter sammen med fenolharpiks sannsynligvis danner et kompleks som resulterer i hurtig vekst av agglomeratets storrelse. De kom-plekse bindingene er relativt sett meget sterke, og folgelig kan det dannede agglomeratet utsettes for relativt store mekaniske påkjenninger uten at det sonderdeles. Dessuten oppnår man flokker som til tross for mekanisk påvirkning hurtig på nytt dannes, og dette representerer et fenomen som det ofte er meget vanskelig å oppnå i en konvensjonell flokning. med aluminiumsulfat og syntetiske polyelektrolytter. This surprisingly positive result is explained by the fact that polyether together with phenolic resin probably forms a complex which results in rapid growth of the agglomerate's size. The complex bonds are comparatively very strong, and consequently the formed agglomerate can be subjected to relatively large mechanical stresses without it splitting apart. In addition, flocks are obtained which, despite mechanical influence, quickly re-form, and this represents a phenomenon which is often very difficult to achieve in conventional flocking. with aluminum sulfate and synthetic polyelectrolytes.
;De polyetere som anvendes ifolge oppfinnelsen utgjore» av vannloselige, ikke-ioniske, dvs. ikke elektrolytiske, poly-alkylenetere (polyalkylenoksyder) med en molekylvekt som overstiger 50 000. Alkylenkjeden i polyeterene utgjores av lavalkylgrupper, "The polyethers used according to the invention are made up" of water-soluble, non-ionic, i.e. non-electrolytic, poly-alkylene ethers (polyalkylene oxides) with a molecular weight exceeding 50,000. The alkylene chain in the polyethers is made up of lower alkyl groups,
fortrinnsvis etylengrupper, eller en blanding av etylen- og propylengrupper. De foeste resultater erholdes med polyetrer som preferably ethylene groups, or a mixture of ethylene and propylene groups. The best results are obtained with polyethers such as
"har en molekylvekt som overstiger 100 000. Den ovre grensen er ikke kritisk. Gode resultater har man erholdt med polyetrer som har en molekylvekt på over 10 millioner. "has a molecular weight that exceeds 100,000. The upper limit is not critical. Good results have been obtained with polyethers that have a molecular weight of over 10 million.
Polyeteren tilsettes hensiktsmessig i form av meget utspedd vannlosning til det behandlede avlopsvannet etter at utflokkuler-ingen har begynt. Hensiktsmessige doseringsmengder er fra ca. 0.01 ppm til ca. 100 ppm, fortrinnsvis 0,1 - 20 ppm, beregnet The polyether is suitably added in the form of a very dilute aqueous solution to the treated waste water after flocculation has begun. Appropriate dosage amounts are from approx. 0.01 ppm to approx. 100 ppm, preferably 0.1 - 20 ppm, calculated
på avlopsvannet. Naturligvis kan også andre tilsetningsmengder være aktuelle avhengig av mengden forurensninger i avlopsvannet, men det nevnte området er ofte det mest hensiktsmessige ut fra praktisk og okonomisk synspunkt. Den ovre grensen er ikké kritisk, men velges av omkostningsmessige grunner. on the wastewater. Naturally, other addition amounts may also be relevant depending on the amount of pollutants in the waste water, but the mentioned range is often the most appropriate from a practical and economic point of view. The upper limit is not critical, but is chosen for cost reasons.
Ved fremgangsmåten ifolge oppfinnelsen tilsettes avlopsvannet med en fenolformaldehydharpiks, og i forbindelse med at det dannes flokker av fenolformaldehydharpiksen og forurensningene tilsettes en vannlosning av den hoymolekylære polyeteren. De herved dannede agglomeratene separeres deretter ved hjelp av innen vannrensningsteknikken kjente metoder, f.eks. sentrifugering sedimentering, fIotasjon eller filtrering. In the method according to the invention, a phenol formaldehyde resin is added to the waste water, and in connection with the formation of flocs of the phenol formaldehyde resin and the pollutants, a water solution of the high molecular weight polyether is added. The agglomerates thus formed are then separated using methods known in water purification technology, e.g. centrifugation sedimentation, flotation or filtration.
Tilsetningen av fenolformaldehydharpiks kan foretas på forskjellige kjente måter avhengig av vannets og harpiksens egenskaper, og er ikke hovedformålet med.nærværende oppfinnelse. Ved f.eks. fremstilling av bundet celluloseholdig materiale, såsom fiber-plater, papir etc, er avlopsvannet vanligvis surt og tilsetning av fenolformaldehydharpiks medforer da en utfelling av harpiksen hvorved forurensningene flokkuleres. Når det gjelder alkaliske The addition of phenol formaldehyde resin can be carried out in various known ways depending on the properties of the water and the resin, and is not the main purpose of the present invention. By e.g. production of bound cellulosic material, such as fibre-boards, paper etc., the waste water is usually acidic and the addition of phenol-formaldehyde resin leads to a precipitation of the resin whereby the pollutants are flocculated. In the case of alkaline
eller noytrale avlopsvann, såsom avlopsvann fra sagverk som or neutral waste water, such as waste water from sawmills which
inneholder barkavfall fra barkpressen, kan en surgjoring være nodvendig for utfelling av fenolformaldehydharpiksen. contains bark waste from the bark press, acidification may be necessary to precipitate the phenol formaldehyde resin.
i in
Fenolharpiksen som anvendes ved fremgangsmåten ifolge oppfinnelsen utgjores av en vannloselig harpiks, hvilken utfelles ved senkning av pH. Mengden tilsatt harpiks er ikke kritisk og kan variere innen et bredt intervall, og bestemmes på kjent måte under hensyntagen til mengden av forurensninger i avlopsvannet. Mengden fenolharpiks bor normalt overstige ca. 0,03 kg, fortrinnsvis ca. 0,1 kg, torr harpiks beregnet pa 1 m 3avlopsvann, og ligger fortrinnsvis innen intervallet 0,03 - 1 kg torr harpiks beregnet på 1 m 3 avlopsvann. Den ovre grensen er ikke kritiskjinen velges av omkostningsmessige grunner. The phenolic resin used in the method according to the invention is made up of a water-insoluble resin, which is precipitated by lowering the pH. The amount of added resin is not critical and can vary within a wide range, and is determined in a known manner taking into account the amount of contaminants in the waste water. The amount of phenolic resin should normally exceed approx. 0.03 kg, preferably approx. 0.1 kg, dry resin calculated on 1 m 3 waste water, and is preferably within the interval 0.03 - 1 kg dry resin calculated on 1 m 3 waste water. The upper limit is not critical, the engine is chosen for cost reasons.
Det er også tenkbart å anvende begrenset vannloselig fenol-formaldehydharpiks, hvilken ved kontakt med avlopsvannet faller ut. Tilsetnings-rekkefolgen av fenolformaldehydharpiksen og polyeteren er i mange tilfeller ikke kritisk. It is also conceivable to use limited water-soluble phenol-formaldehyde resin, which precipitates on contact with the waste water. The order of addition of the phenol formaldehyde resin and the polyether is not critical in many cases.
Man kan således også tenke seg å tilsette polyeteren for utfellingen av fenolformaldehydharpiksen finner sted. One can thus also imagine adding the polyether before the precipitation of the phenol formaldehyde resin takes place.
Folgende utforelseseksempler er på ingen måte begrensende for oppfinnelsen, men skal bare anskueliggjøre denne. The following exemplary embodiments are in no way limiting the invention, but are only intended to illustrate this.
EKSEMPEL 1 Flotasjonsforsok EXAMPLE 1 Flotation experiment
A. 11. bakvann fra en fiberplatefabrikk ble fylt i et gradert sylinderformet måleglass. Bakvannet hadde et torrstoffinnhold av fibrer på ca. 1% og var grumsete. A. 11. waste water from a fibreboard factory was filled into a graduated cylindrical measuring glass. The tailwater had a dry matter content of fibers of approx. 1% and was cloudy.
Under omroring tilsattes 2 ml vannlosning av et fenolformaldehydharpiks ("Casco 1594") Sverige) med et torrstoffinnhold på 31%. 100 ml luftmettet vann og 5 ml av en polyetylenoksydlosning (molekylvekt 300 000) med et torrstoffinnhold på While stirring, 2 ml of water solution of a phenol formaldehyde resin ("Casco 1594") Sweden) with a solids content of 31% was added. 100 ml of air-saturated water and 5 ml of a polyethylene oxide solution (molecular weight 300,000) with a solids content of
0,1% ble deretter tilsatt. Da omroringen opphorte begynte de nå agglomererte flokkene å flyte opp mot væskeoverflaten, hvorved man erholdt klart vann ved bunnen av måleglasset. 0.1% was then added. When the stirring ceased, the now agglomerated flocks began to float up towards the liquid surface, whereby clear water was obtained at the bottom of the measuring glass.
Hoyden av den klare væskesoylen ble oppmålt ved forekjellige tidspunkter etter avsluttet omroring. Hoyden angis i prosenter av den totale hoyden av vannsoylen i tabell I. The height of the clear liquid soil was measured at various times after the end of stirring. The height is given in percentages of the total height of the water column in table I.
B. Som sammenligning gjennomførte man samme fremgangsmåte som er beskrevet i eksempel IA, men med den forskjell at tilsetningen av polyetylenoksyd ble sloyfet. Resultatet angis i tabell 1. B. As a comparison, the same procedure as described in example IA was carried out, but with the difference that the addition of polyethylene oxide was slowed down. The result is shown in table 1.
C. For sammenligning gjennomførte man samme fremgangsmåte som er beskrevet i eksempel IA,men med den forskjell at tilsetningen av fenolformaldehydharpiks ble sloyfet. Resultatet fremgår av tabell I. C. For comparison, the same procedure as described in example IA was carried out, but with the difference that the addition of phenol formaldehyde resin was delayed. The result appears in table I.
EKSEMPEL 2 Sedimentas i onstest EXAMPLE 2 Sediments in ontest
A. 11. bakvann fra en fiberplatefabrikk ble fylt i et gradert sylinderformet måleglass. Bakvannet hadde et torr-stof f innhold av fibre på ca. 1% og var grumsete. A. 11. waste water from a fibreboard factory was filled into a graduated cylindrical measuring glass. The waste water had a dry matter f content of fibers of approx. 1% and was cloudy.
Under omroring tilsattes 2 ml vannlosning av samme fenol-formaldehydharpiks som ble anvendt i eksempel IA og 5ml av en polyetylenoksydlosning (molekylvekt 5 millioner) med et torrstoffinnhold på 0,1%. Da omroringen ble avsluttet begynte deagglomererte flokkene å sedimentere, hvorved man erholdt klart vann ved toppen av måleglasset. While stirring, 2 ml of a water solution of the same phenol-formaldehyde resin that was used in example IA and 5 ml of a polyethylene oxide solution (molecular weight 5 million) with a solids content of 0.1% were added. When the stirring was finished, the deagglomerated flocs began to settle, whereby clear water was obtained at the top of the measuring glass.
Hoyden av den klare vannsøylen ble oppmålt ved forskjellige tidspunkter etter avsluttet omroring. Hoyden angis i prosenter beregnet på den totale vannsøylens hoyde i tabell II. The height of the clear water column was measured at different times after the end of stirring. The height is given in percentages calculated on the total height of the water column in table II.
■ B. Som sammenligning gjennomforte man samme fremgangsmåte som er beskrevet i eksempel 1A? men med den forskjell at tilsetningen av polyetylenoksyd ble sloyfet. Resultatet angis i tabell H. ■ B. As a comparison, was the same procedure described in example 1A carried out? but with the difference that the addition of polyethylene oxide was omitted. The result is shown in table H.
C. For sammenligning gjennomforte man samme fremgangsmåte som er beskrevet i eksempel lA,men med den forskjell at tilsetningen av fenolformaldehydharpiks ble sloyfet. Resultatet fremgår av tabell 11. C. For comparison, the same procedure as described in example 1A was carried out, but with the difference that the addition of phenol formaldehyde resin was slowed down. The result appears in table 11.
Som det fremgår av tabellene I og II gir kombinasjonen av fenolharpiks og polyeter meget bedre resultater med hensyn til agglomereringen av forurensninger enn de begge komponentene hver for seg. Som det også fremgår av eksemplene 1C og 2C medforer anvendelsen av bare polyeter som flokhingsmiddel ingen agglomerering på 30 minutter. As can be seen from Tables I and II, the combination of phenolic resin and polyether gives much better results with regard to the agglomeration of contaminants than the two components separately. As can also be seen from examples 1C and 2C, the use of only polyether as flocculant does not result in agglomeration in 30 minutes.
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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SE216672A SE357950B (en) | 1972-02-22 | 1972-02-22 |
Publications (2)
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NO132275B true NO132275B (en) | 1975-07-07 |
NO132275C NO132275C (en) | 1975-10-15 |
Family
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NO71773A NO132275C (en) | 1972-02-22 | 1973-02-21 |
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JP (1) | JPS5225027B2 (en) |
AT (1) | AT320544B (en) |
CA (1) | CA1004782A (en) |
DD (1) | DD101650A5 (en) |
DE (1) | DE2308815C3 (en) |
FI (1) | FI57245C (en) |
FR (1) | FR2173166A1 (en) |
IT (1) | IT977422B (en) |
NO (1) | NO132275C (en) |
SE (1) | SE357950B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993022243A1 (en) * | 1992-05-05 | 1993-11-11 | Eka Nobel Ab | Method for purifying process water or wastewater containing wood resin |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
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SE459925B (en) * | 1987-12-23 | 1989-08-21 | Boliden Ab | SEPARATION OF HARTS WORLD MASS DISPENSER |
US5230808A (en) * | 1991-06-17 | 1993-07-27 | Nalco Canada Inc. | Liquid suspension of polyethylene oxide for use in treating paper and pulp wastewater |
US5173208A (en) * | 1991-06-17 | 1992-12-22 | Nalco Canada Inc. | Liquid suspension of polyethylene oxide for use in treating paper and pulp wastewater |
US5178770A (en) * | 1991-07-12 | 1993-01-12 | Nalco Canada Inc. | Method of treating bctmp/ctmp wastewater |
US5670021A (en) * | 1992-01-29 | 1997-09-23 | Kemira Kemi Aktiebolag | Process for production of paper |
SE9303762L (en) * | 1993-11-15 | 1995-05-16 | Eka Nobel Ab | Ways to purify process water from pulp production |
SE509777C2 (en) | 1997-07-07 | 1999-03-08 | Kemira Kemi Ab | Methods to improve retention in dewatering a cellulose fiber suspension using an agent comprising a phenol formaldehyde resin and a polyethylene oxide |
GB9800497D0 (en) * | 1998-01-09 | 1998-03-04 | Allied Colloids Ltd | Dewatering of sludges |
Family Cites Families (1)
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US3141816A (en) * | 1960-07-27 | 1964-07-21 | Nalco Chemical Co | Method of improving operational efficiency of white water recovery systems |
-
1972
- 1972-02-22 SE SE216672A patent/SE357950B/xx unknown
-
1973
- 1973-02-07 FI FI36073A patent/FI57245C/en active
- 1973-02-20 IT IT4835673A patent/IT977422B/en active
- 1973-02-21 DD DD16897673A patent/DD101650A5/xx unknown
- 1973-02-21 NO NO71773A patent/NO132275C/no unknown
- 1973-02-21 CA CA164,270A patent/CA1004782A/en not_active Expired
- 1973-02-22 AT AT157773A patent/AT320544B/en not_active IP Right Cessation
- 1973-02-22 FR FR7306256A patent/FR2173166A1/en active Granted
- 1973-02-22 JP JP2072573A patent/JPS5225027B2/ja not_active Expired
- 1973-02-22 DE DE19732308815 patent/DE2308815C3/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993022243A1 (en) * | 1992-05-05 | 1993-11-11 | Eka Nobel Ab | Method for purifying process water or wastewater containing wood resin |
US5354479A (en) * | 1992-05-05 | 1994-10-11 | Eka Nobel Ab | Method for purifying process water or wastewater containing wood resin |
Also Published As
Publication number | Publication date |
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DD101650A5 (en) | 1973-11-12 |
DE2308815B2 (en) | 1981-03-19 |
AT320544B (en) | 1975-02-10 |
CA1004782A (en) | 1977-02-01 |
DE2308815A1 (en) | 1973-09-06 |
NO132275C (en) | 1975-10-15 |
JPS5225027B2 (en) | 1977-07-05 |
FR2173166B1 (en) | 1976-11-05 |
FI57245C (en) | 1980-07-10 |
DE2308815C3 (en) | 1982-01-28 |
IT977422B (en) | 1974-09-10 |
SE357950B (en) | 1973-07-16 |
FI57245B (en) | 1980-03-31 |
FR2173166A1 (en) | 1973-10-05 |
JPS4898653A (en) | 1973-12-14 |
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