DK169402B1 - Regeneration of diatomaceous earth from the brewery industry - Google Patents
Regeneration of diatomaceous earth from the brewery industry Download PDFInfo
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- DK169402B1 DK169402B1 DK340587A DK340587A DK169402B1 DK 169402 B1 DK169402 B1 DK 169402B1 DK 340587 A DK340587 A DK 340587A DK 340587 A DK340587 A DK 340587A DK 169402 B1 DK169402 B1 DK 169402B1
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- diatomaceous earth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/14—Diatomaceous earth
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- Life Sciences & Earth Sciences (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Filtering Materials (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
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- Distillation Of Fermentation Liquor, Processing Of Alcohols, Vinegar And Beer (AREA)
Abstract
Description
i DK 169402 B1in DK 169402 B1
Opfindelsen vedrører en fremgangsmåde til genoparbejdning 5 af brugt, som filtreringsmiddel i bryggeribranchen anvendt kiselgur.The invention relates to a process for reprocessing spent spent filtering agent used in the brewing industry diatomaceous earth.
Kiselgur, der også betegnes som trippelse, bjergmel eller diatomejord, er en melagtig til fast, fortrinsvis hvid el-10 ler grøn, kridtlignende masse. Det drejer sig om de af kiselsyre bestående skaller fra encellede alger (diatoméer), der lever i vandet, og som, når de er døde, synker ned på bunden, hvor de danner aflejringer, der kan udnyttes. Skjoldene består af to halvskaller af de mest forskelligar-15 tede former og skikkelser. Indtil nu kendes flere tusinde forskellige diatomearter.Diatomaceous earth, also referred to as triple, mountain flour or diatomaceous earth, is a milky to solid, preferably white or 10-clay green, chalk-like mass. These are the silica shells of single-celled algae (diatoms) that live in the water and, when dead, sink to the bottom where they form deposits that can be utilized. The shields consist of two half shells of the most diverse shapes and forms. Until now, thousands of different diatom species are known.
Den store betydning, som kiselgur har i teknikken i dag, beror på den store opsugningsevne, benyttelsen som bærer 20 for katalysatorer, flydende, opløste og faste stoffer og frem for alt på anvendelsen som filterhjælpemiddel og som fyldstof.The great importance of diatomaceous earth in the art today is due to its high absorbency, its use as a carrier for catalysts, liquid, dissolved and solids and above all for its use as a filter aid and as a filler.
I bryggerierne opstår brugt kiselgur i betydelige mængder 25 ved filtreringen af urten og det lagrede øl.In the breweries, spent diatomaceous earth occurs in considerable quantities 25 by the filtration of the herb and the stored beer.
Ved filtrering af urten anvendes kiselgurfiltre til at fjerne kuldeuklarheden. Filtreringen af urten fortages dog hyppigt også ved sedimentation i kølekarret eller påsæt-30 ningskarret. Derved tilbageholdes ca. 60% af kuldeuklarheden.When filtering the herb, diatomaceous earth filters are used to remove the cold cloudiness. However, the filtration of the herb is also frequently carried out by sedimentation in the refrigerator or application vessel. Thereby, approx. 60% of the cold clarity.
Før påfyldningen må øllet filtreres omhyggeligt endnu engang for at gøre det klart og biologisk holdbart. Kun ved 35 visse overgærede ølsorter af står man fra det for fuldt ud at bevare den aromatiske smag.Before filling, the beer must be carefully filtered again to make it clear and biologically durable. Only 35 certain fermented beers are left to fully preserve the aromatic taste.
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Ved filtreringen med kiselgur tilblandes øllet en blanding af finere og grovere kiselgur som filterhjælpemiddel. Til forbedring af filtreringsegenskaberne tilsættes aktivt kul, 5 kiselgel og perlit. Kiselguren afsætter sig sammen med de stoffer, der forårsager uklarheden, på en filterdug og fjernes efter tilendebragt filtrering i pastaagtig eller tør tilstand.When filtering with diatomaceous earth, the beer mixes a mixture of finer and coarser diatomaceous earth as filter aid. To improve the filtration properties, activated charcoal, silica gel and perlite are added. The diatomaceous earth, together with the substances that cause the cloudiness, settles on a filter cloth and is removed after the filtration is pasted in paste or dry state.
10 Af rationelle grunde, såvel med henblik på bortskaffelsen som en senere udnyttelse, fjernes kiselguren fra filtrene i "tør" tilstand. På denne måde sparer man en del af transportomkostningerne og den nødvendige afvanding før deponeringen.10 For rational reasons, both for disposal and subsequent use, the diatomaceous earth is removed from the filters in a "dry" state. This way you save part of the transport costs and the necessary drainage before the landfill.
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En sådan pastaagtig "tørgur" har efter fjernelsen fra filteret omtrent følgende sammensætning:Such a paste-like "dry watch" after removal from the filter has approximately the following composition:
Fugtindhold 68 til 75% 20 Kiselgur 20 til 27%Moisture content 68 to 75% 20 Diatomaceous earth 20 to 27%
Organiske bestanddele ca. 5%Organic constituents approx. 5%
Fugtindholdet stammer fra det efter filtreringen tilbageværende øl.The moisture content is derived from the beer remaining after filtration.
2525
De af filtermassen optagene organiske bestanddele består af gær, æggehvidestoffer og humleharpikser. De har en brændværdi på ca. 5 000 kcal/kg (20 920 kJ/kg).The organic constituents absorbed by the filter mass consist of yeast, egg whites and hop resins. They have a calorific value of approx. 5,000 kcal / kg (20,920 kJ / kg).
30 Den på bryggerierne som biprodukt opstående kiselgur bortskaffes praktisk taget fuldstændig. Kun på nogle små bryggerier sættes den til masken eller spredes som gødning på landbrugsområder.30 The diatomaceous earth which stands at the breweries as a by-product is almost completely disposed of. Only on some small breweries is it added to the mask or spread as fertilizer in agricultural areas.
35 Fjernelsen af kiselguren er hidtil sket ved følgende foranstaltninger: 3 DK 169402 B1 a. Udledning i et rensningsanlæg.35 The removal of the diatomaceous earth has so far been carried out by the following measures: 3 DK 169402 B1 a. Discharge in a treatment plant.
Her skylles kiselguren ud af filtrene med vand og 5 ledes til et rensningsanlæg. Ved et af virksomheden ejet rensningsanlæg må kiselguren ved hjælp af et køretøj med sugebeholder pumpes op af aflejringsgruben og køres til bortskaffelse. Direkte udledning i kloaksystemet fører til tilstopning.Here, the diatomaceous earth is flushed out of the filters with water and 5 is led to a treatment plant. At a wastewater owned by the company, the diatomaceous earth must be pumped up by the vehicle with a suction container and removed for disposal. Direct discharge into the sewer system leads to clogging.
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Udledning i kloaksystemet er dog heller ikke af miljøgrunde holdbart i længden.However, discharge into the sewer system is not sustainable for environmental reasons, either.
b. Udledning i et afløb.b. Discharge into a drain.
1515
Udledning af kiselguren i afløbet uden forudgående rensning turde ikke længere være tilladeligt.Discharge of the diatomaceous earth into the drain without prior cleaning should no longer be permissible.
c. Deponering på en losseplads.c. Landfill disposal.
2020
Kiselguren kan fjernes fra filterrammerne i tør tilstand, dvs. ved forsigtig skrabning fra filterdugen. Ved nyere anlæg sker dette allerede automatisk. Den køres så til lossepladsen i form af en 25 tyk grød.The diatomaceous earth can be removed from the filter frames in a dry state, ie. by careful scraping from the filter cloth. For newer plants this is already done automatically. It is then driven to the landfill in the form of a 25 thick porridge.
Det er også almindeligt kun at tørre en del af kiselguren og bringe den til lossepladsen. Den resterende mængde opstemmes da og kommes i spildvandet.It is also common to dry only part of the diatomaceous earth and bring it to the landfill. The remaining amount is then stirred up and put into the waste water.
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Fjernelsen af kiselguren i tør tilstand er let at foretage indenfor virksomhedens område og bringer den fuldstændige løsning på spildevandsspørgsmålet. Ved bortskaffelsen er der dog nogle synspunkter at tage i betragtning.The removal of the diatomaceous earth in the dry state is easy to do within the company's area and brings the complete solution to the waste water issue. When disposing, however, there are some views to take into consideration.
3535
En deponering af kiselguren vil for fremtiden hovedsagelig 4 kun være mulig, når den leveres i stikfast tilstand. Ellers må der betales yderligere afgifter for afvandingen.A deposit of the diatomaceous earth will in future mainly be possible only 4 when it is delivered in plug-in condition. Otherwise, additional fees must be paid for the drainage.
DK 169402 B1DK 169402 B1
Transporten af kiselguren giver ligeledes problemer. På 5 grund af den grødagtige tilstand kan en lastbil med åbent lad ikke benyttes, da aflæsningen og rengøringen erfaringsmæssigt er forbundet med store omkostninger. Gærindholdet og de derigennem, navnlig i sommermånederne, opstående luftarter fører til en opbobling af kiselguren og til en 10 stærk lugtbelastning. En transport kan derfor kun ske i specialkøretøjer, hvorved der opstår betydelige omkostninger.Transporting the diatomaceous earth also causes problems. Due to the mushy condition, an open-loading truck cannot be used, since the loading and cleaning experience is inherently associated with high costs. The yeast content and the resulting gases, especially during the summer months, lead to a buildup of the diatomaceous earth and to a strong odor load. Consequently, transport can only take place in specialized vehicles, resulting in significant costs.
Til løsning af disse mangesidede problemer er der også al-15 lerede forelagt det foreslag at opføre et centralt anlæg med stor kapacitet til oparbejdning af den i bryggerier eller ved kemisk rensning anvendte kiselgur. Vedrørende dette henvises der til forskningsrapporten T 77-09 fra Forbundsministeriet for Forskning og Teknologi fra juli 1977. Ved 20 hjælp af en ovn med fluidiseret leje samt en cyklonudskiller, et elektrofilter og andre stortekniske apparater sker der en forbrænding af de uskadelige indholdsstoffer.To solve these many-sided problems, it has already been proposed to build a central plant with a large capacity for reprocessing the diatomaceous earth used in breweries or in chemical purification. In this regard, reference is made to the research report T 77-09 of the Federal Ministry of Research and Technology of July 1977. By means of a fluid-bed furnace as well as a cyclone separator, an electric filter and other large-tech appliances, the harmless ingredients are incinerated.
De nødvendige temperaturer kommer op på en størrelse af ca.The required temperatures come up to a size of approx.
25 700°C, og kapaciteten af et sådan anlæg andrager 40 tons filterremanens pr. dag, svarende til en ølproduktion på 16 millioner hl pr. år.25 700 ° C, and the capacity of such a plant is 40 tonnes of filter residue per hectare. per day, equivalent to a beer production of 16 million hl per day. year.
Foruden de høje transportudgifter for den brugte og den op-30 arbejdede kiselgur må der afholdes høje energiudgifter til forbrændingsprocessen.In addition to the high transport costs for the spent and upgraded diatomaceous earth, high energy costs must be incurred for the combustion process.
En yderligere ulempe består deri, at den brugte kiselgur tilføres storanlægget fra alle mulige forskellige bryggeri-35 er, hvorved alle mulige forskellige kornstørrelser i det tilførte materiale blandes sammen.A further disadvantage is that the spent diatomaceous earth is fed to the large plant from all possible different breweries, whereby all possible different grain sizes in the feed material are mixed together.
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Det har vist sig, at ved filtreringsprocessen for bestemte ølsorter er et bestemt blandingsforhold af kornstørrelserne i kiselguren fordelagtig. Den oparbejdede kiselgur har et 5 derfra afvigende og ikke mere uden videre konstaterbart blandingsforhold af kornstørrelser, så genanvendelse ikke mere fører til den maksimale virkning ved filtreringsprocessen.It has been found that in the filtration process for certain beers, a certain mixing ratio of the grain sizes in the diatomaceous earth is advantageous. The worked diatomaceous earth has a deviating from the grain size, which is no longer easily ascertained, so that recycling no longer leads to the maximum effect of the filtration process.
10 Til grund for opfindelsen ligger den opgave at angive en fremgangsmåde til oparbejdning af kiselgur, som fremkommer i bryggerier, og hvilken fremgangsmåde er økonomisk og miljøvenlig og kan gennemføres i selve bryggeriet, idet de hertil nødvendige anlæg kan tilpasses en hvilken som helst 15 kapacitet.The object of the invention is to provide a method for working up diatomaceous earth which is produced in breweries and which process is economical and environmentally friendly and can be carried out in the brewery itself, since the plants required for this can be adapted to any capacity.
Til grund for opfindelsen ligger den erkendelse, at en våd kemisk oparbejdning af filterguren direkte i den forarbejdende virksomhed lader sig gennemføre væsentlig mere økono-20 misk.The basis of the invention is the recognition that a wet chemical reprocessing of the filter yeast directly into the processing enterprise can be carried out significantly more economically.
Denne opgave løses ved en fremgangsmåde til genoparbejdning af brugt, som filtreringsmiddel i bryggeribranchen anvendt kiselgur, hvilken fremgangsmåde ifølge opfindelsen er sær-25 egen ved, at der til den brugte kiselgur sættes en 2 til 8%ig natronlud ved en reaktionstemperatur på fra 60 til 90°C og under en reaktionstid på fra 30 til 120 minutter udsættes for en skånende omrøring.This problem is solved by a process for reprocessing spent as filtering agent used in the brewing industry diatomaceous earth, which method according to the invention is special in that a 2 to 8% g of sodium hydroxide solution is added to the spent diaper at a reaction temperature of 60 to 90 ° C and for a reaction time of from 30 to 120 minutes is subjected to gentle stirring.
30 Koncentrationen af natronluden andrager fortrinsvis 4 til 5%, reaktionstemperaturen 80 til 90°C og reaktionstiden ca.The concentration of the baking soda is preferably 4 to 5%, the reaction temperature 80 to 90 ° C and the reaction time approx.
1 time.1 hour.
Ved en sådan behandling i 1 time af kiselguren fjernes 35 praktisk taget alle æggehvideholdige stoffer såvel som gæren næsten fuldstændigt. Kiselguren indeholder så kun ca. 1 6 DK 169402 B1 til 2% organisk stof, som overvejende består af polysaccha-rider. Disse kan efter behov fjernes ved en syrehydrolyse med svovlsyre eller saltsyre.By such treatment for 1 hour of the diatomaceous earth, virtually all egg white-containing substances as well as the yeast are removed almost completely. The diatomaceous earth then contains only approx. 1 6 DK 169402 B1 to 2% organic matter consisting mainly of polysaccharides. These can be removed as needed by an acid hydrolysis with sulfuric acid or hydrochloric acid.
5 Ved filtreringsforsøgene viste det sig dog, at disse poly-saccharider ikke forstyrrer filtreringen, så de ikke ubetinget skal fjernes.However, in the filtration experiments, these polysaccharides did not interfere with the filtration so that they do not need to be removed unconditionally.
Ved genoparbejdningen af kiselgur må der regnes med en til-10 sætning af ubrugt kiselgur i en mængde på 10 til 20%. Af denne grund kan indholdet af organisk stof i den oparbejdede kiselgur, selv ved uafbrudt oparbejdning, ikke overstige 8%. Herved påvirkes kiselgurens filtreringsvirkning på ingen måde i ugunstig retning.In the reprocessing of diatomaceous earth, an addition of 10 to unused diatomaceous earth in an amount of 10 to 20% must be counted. For this reason, the organic matter content of the worked diatomaceous earth, even in uninterrupted work-up, cannot exceed 8%. This does not in any way adversely affect the filtration effect of the diatomaceous earth.
1515
Fremgangsmåden ifølge opfindelsen gennemføres som følger.The process of the invention is carried out as follows.
Den brugte kiselgur fra filteret bringes over i en beholder, der kan opvarmes, og blandes med ca. 4 til 5%ig na-20 tronlud. Reaktionstemperaturen andrager herved 80 til 90°C og reaktionstiden ca. 1 time. Ved skånende omrøring eller indblæsning af luft gennemblandes substratet jævnt i reaktionstiden.The spent diatomaceous earth from the filter is transferred to a heatable container and mixed with approx. 4 to 5% ig na-20 throne liquor. The reaction temperature is 80 to 90 ° C and the reaction time is approx. 1 hour. By gently stirring or blowing in air, the substrate is evenly mixed during the reaction time.
25 Fjernelsen af natronluden og skylningen af kiselguren sker fortrinsvis ved hjælp af et vakuum henholdsvis trykbåndsfilter i modstrøm i ca. 4 til 5 ekstraktionstrin. Til fuldstændig fjernelse af luden kan skyllevandet i det sidste ekstraktionstrin tilsættes indtil 0,1% svovlsyre eller 30 saltsyre.The removal of the baking soda liquor and the flushing of the diatomaceous earth are preferably effected by means of a vacuum or pressure band filter in the countercurrent for approx. 4 to 5 extraction steps. For complete removal of the liquor, the rinse water in the last extraction step can be added up to 0.1% sulfuric acid or 30 hydrochloric acid.
Indtil genanvendelsen opbevares den rensede og regenererede kiselgur under vand.Until recycling, the purified and regenerated diatomaceous earth is stored under water.
35 Til supplering af tabene ved oparbejdningen må der regnes med en tilsætning af 10 til 20% ny kiselgur.35 To supplement the losses during reprocessing, an addition of 10 to 20% new diatomaceous earth must be expected.
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De gennemførte filtreringsforsøg med indtil fem gange rege-neret kiselgur uden tilsætning af ubrugt kiselgur viste ingen ændringer i forhold til den normale filtrering.The filtration experiments carried out with up to five times regenerated diatomaceous earth without the addition of unused diatomaceous earth showed no changes compared to the normal filtration.
55
Filtreringsresultaterne med regeneret kiselgur i sammenligning med original kiselgur, som er opnået ved hjælp af et laboratoriforsøgsfilter, er vist i de følgende tabeller.The filtration results with regenerated diatomaceous earth compared to original diatomaceous earth obtained by a laboratory test filter are shown in the following tables.
10 Forsøgsfiltrering; Da der i den undersøgte virksomhed ar bejdes med en for- og efterfiltrering, skete der en adskilt oparbejdning af kiselguren fra de to filtre.10 Experimental Filtration; As a pre- and post-filtration work was carried out in the investigated company, a separate reprocessing of the diatomaceous earth from the two filters took place.
1. Oparbejdning af kiselguren fra forfilteret (grovgur).1. Reprocessing the diatomaceous earth from the pre-filter (rough watch).
15 I flere sammenligningsforsøg blev virksomhedens brugte kiselgur oparbejdet ifølge den beskrevne fremgangsmåde og undersøgt i sammenligning med ubrugt kiselgur (forsøg nr. 1 til 3). Desuden blev den fem gange regenerede 20 kiselgur i et yderligere forsøg anvendt til filtrering uden tilsætning af ny kiselgur (forsøg nr. 4 til 8).15 In several comparative experiments, the company's used diatomaceous earth was worked up according to the procedure described and examined in comparison with unused diatomaceous earth (Experiments Nos. 1 to 3). In addition, in a further experiment the five times regenerated diatomaceous earth was used for filtration without the addition of new diatomaceous earth (Experiments Nos. 4 to 8).
Angivelsen op refererer til differentialtrykket ved samme filtreringstid.The indication up refers to the differential pressure at the same filtration time.
25 30 35 8 DK 169402 B125 30 35 8 DK 169402 B1
Tabel iTable i
Filtreringsforsøg med regeneret kiselgur (grovgur).Filtration experiments with regenerated diatomaceous earth (rough watch).
5 Forsøg nr._Sammenligning ύρ regeneret gur op 1 2,1 1,8 2 4,5 2,4 3 6,0 1,0 10 4 — 1,9 5 — 1,8 6 4,0 1,8 7 2,8 4,0 8 3,8 4,1 15 2. Oparbejdning af kiselguren fra efterfilteret (blanding 20 af grov og fin kiselgur og kiselgel).5 Experiment No._Comparison ύρ regenerated watch up 1 2.1 1.8 2 4.5 2.4 3 6.0 1.0 10 4 - 1.9 5 - 1.8 6 4.0 1.8 7 2 , 8 4.0 8 3.8 4.1 15 2. Working up of diatomaceous earth from the after filter (mixture 20 of coarse and fine diatomaceous earth and diatomaceous earth).
Tabel IITable II
Forsøg nr. Sammenligning ύρ regeneret gur op 25 1 0,7 0,2 2 0,7 0,2 3 0,6 0,1 4 0,8 0,2 30Experiment No. Comparison ύρ regenerated watch 25 25 0.7 0.2 2 0.7 0.2 3 0.6 0.1 4 0.8 0.2 30
Filtreringsresultaterne viser klart, at regenereringen ingen ufordelagtig virkning havde på filterydelsen.The filtration results clearly show that the regeneration had no disadvantageous effect on the filter performance.
Ved den fine kiselgur kunne endog en tydelig forhøjelse af 35 filterydelsen opnås, uden at øllets uklarhed og kuldeuklarhed forringedes.By the fine diatomaceous earth, even a clear increase in the filter performance could be achieved, without impairing the turbidity and cold clarity of the beer.
Claims (6)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3623484 | 1986-07-11 | ||
| DE19863623484 DE3623484A1 (en) | 1986-07-11 | 1986-07-11 | REGENERATION OF KIESELGUR |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK340587D0 DK340587D0 (en) | 1987-07-02 |
| DK340587A DK340587A (en) | 1988-01-12 |
| DK169402B1 true DK169402B1 (en) | 1994-10-24 |
Family
ID=6304997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK340587A DK169402B1 (en) | 1986-07-11 | 1987-07-02 | Regeneration of diatomaceous earth from the brewery industry |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0253233B1 (en) |
| JP (1) | JP2618640B2 (en) |
| AT (1) | ATE58489T1 (en) |
| DE (2) | DE3623484A1 (en) |
| DK (1) | DK169402B1 (en) |
| ES (1) | ES2019341B3 (en) |
| GR (1) | GR3001307T3 (en) |
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| DE3834034A1 (en) * | 1988-05-14 | 1989-11-23 | Huels Chemische Werke Ag | Process for the regeneration of arsenic-contaminated sorbents |
| WO1994008693A1 (en) * | 1992-10-08 | 1994-04-28 | Sofima Ag | Process and device for removing deposits from filter auxiliaries |
| ATE183943T1 (en) * | 1993-02-12 | 1999-09-15 | Filtrox Ag | METHOD FOR CLEANING A FILTER AID BY ADDING ENZYMES |
| US5801051A (en) * | 1994-02-10 | 1998-09-01 | Filtrox-Werk Ag | Method and apparatus for cleaning a filter aid |
| FR2733922B1 (en) * | 1995-05-12 | 1997-07-25 | Interbrew Sa | NOVEL FILTRATION ADJUVANTS, NOVEL FILTRATION MEDIA, FILTRATION METHOD USING THE SAME AND REGENERATION METHOD OF THE SAME |
| FR2733920B1 (en) * | 1995-05-12 | 2001-06-08 | Interbrew Sa | METHOD FOR REGENERATING FILTRATION ADJUVANTS |
| NL1000411C2 (en) * | 1995-05-22 | 1996-11-25 | Tno | Method of removing organic matter from an aqueous stream. |
| WO1999016531A1 (en) * | 1997-09-30 | 1999-04-08 | Anheuser Busch | Regeneration of filter media |
| FR2779665B1 (en) * | 1998-06-16 | 2000-08-18 | Kronenbourg Brasseries | METHOD FOR REGENERATING AN EXHAUSTED INFUSORY EARTH AND DEVICE FOR CARRYING OUT THIS METHOD |
| DE19833405A1 (en) * | 1998-07-24 | 2000-02-03 | Stadler Johann | Process for using diatomaceous earth for filtration |
| DE19944624A1 (en) * | 1999-09-17 | 2001-03-22 | I F B Inst Fuer Bioanalytik Um | Process for working up used filter material produced from the filtration of rolling oils used for rolling aluminum foils and strips uses a scrubbing solution to produce rolling oil, kieselguhr, bleaching material and aluminum for reuse |
| DE10134861A1 (en) * | 2001-07-18 | 2003-02-20 | Seitz Schenk Filtersystems Gmb | Liquid filtration process |
| DE10251792A1 (en) * | 2002-11-07 | 2004-05-19 | Industriebetriebe Heinrich Meyer-Werke Breloh Gmbh & Co. Kg | Process for the regeneration of filter media, especially diatomaceous earth |
| US7993533B2 (en) | 2006-09-29 | 2011-08-09 | Basf Se | Method for regenerating an auxiliary filtering agent |
| PL2136913T3 (en) | 2007-03-15 | 2018-09-28 | Basf Se | Method for regenerating a filter aid |
| US11325058B2 (en) * | 2018-09-06 | 2022-05-10 | The United States Of America, As Represented By The Secretary Of Agriculture | Apparatus and method for rejuvenation and recovery of filtration media |
| CN116964068A (en) | 2021-02-24 | 2023-10-27 | 豪夫迈·罗氏有限公司 | Regeneration and multiple use of depth filters |
| CN113318520B (en) * | 2021-05-11 | 2023-07-07 | 重庆艺锦陶瓷有限公司 | Deoiling treatment device capable of enabling diatomite to be reused |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE344499C (en) * | 1920-03-13 | 1921-11-25 | Mueller Karl | Process for the regeneration of used bleaching earth |
| US1545322A (en) * | 1922-10-28 | 1925-07-07 | Hebden Sugar Process Corp | Regeneration of sugar-purifying reagents |
| DE469606C (en) * | 1927-02-15 | 1928-12-18 | Richard Koech Dr | De-ironing of diatomite |
| DE605736C (en) * | 1931-07-02 | 1934-11-17 | Heinrich Gerstenberg | Process for the complete revitalization of exhausted bleaching earth |
-
1986
- 1986-07-11 DE DE19863623484 patent/DE3623484A1/en not_active Withdrawn
-
1987
- 1987-07-02 DK DK340587A patent/DK169402B1/en not_active IP Right Cessation
- 1987-07-03 ES ES87109590T patent/ES2019341B3/en not_active Expired - Lifetime
- 1987-07-03 DE DE8787109590T patent/DE3766304D1/en not_active Expired - Fee Related
- 1987-07-03 AT AT87109590T patent/ATE58489T1/en active
- 1987-07-03 EP EP87109590A patent/EP0253233B1/en not_active Expired - Lifetime
- 1987-07-09 JP JP62169930A patent/JP2618640B2/en not_active Expired - Lifetime
-
1991
- 1991-01-10 GR GR91400014T patent/GR3001307T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE3623484A1 (en) | 1988-01-21 |
| DK340587A (en) | 1988-01-12 |
| JP2618640B2 (en) | 1997-06-11 |
| EP0253233A2 (en) | 1988-01-20 |
| JPS6365950A (en) | 1988-03-24 |
| GR3001307T3 (en) | 1992-08-31 |
| EP0253233B1 (en) | 1990-11-22 |
| EP0253233A3 (en) | 1988-08-24 |
| ES2019341B3 (en) | 1991-06-16 |
| DK340587D0 (en) | 1987-07-02 |
| ATE58489T1 (en) | 1990-12-15 |
| DE3766304D1 (en) | 1991-01-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B1 | Patent granted (law 1993) | ||
| PBP | Patent lapsed |