CH650755A5 - Verfahren fuer die chemische ausscheidung von phosphorverbindungen aus abwasser und verfahren fuer die reinigung von abwasser. - Google Patents
Verfahren fuer die chemische ausscheidung von phosphorverbindungen aus abwasser und verfahren fuer die reinigung von abwasser. Download PDFInfo
- Publication number
- CH650755A5 CH650755A5 CH4927/80A CH492780A CH650755A5 CH 650755 A5 CH650755 A5 CH 650755A5 CH 4927/80 A CH4927/80 A CH 4927/80A CH 492780 A CH492780 A CH 492780A CH 650755 A5 CH650755 A5 CH 650755A5
- Authority
- CH
- Switzerland
- Prior art keywords
- phosphate
- waste water
- calcium
- compound
- metal
- Prior art date
Links
- 239000002351 wastewater Substances 0.000 title claims description 45
- 238000000034 method Methods 0.000 title claims description 41
- 150000001875 compounds Chemical class 0.000 title claims description 8
- 239000000126 substance Substances 0.000 title claims description 7
- 238000000746 purification Methods 0.000 title claims description 5
- 230000008030 elimination Effects 0.000 title 1
- 238000003379 elimination reaction Methods 0.000 title 1
- 229910019142 PO4 Inorganic materials 0.000 claims description 56
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 54
- 239000010452 phosphate Substances 0.000 claims description 54
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- 239000002245 particle Substances 0.000 claims description 25
- 229940043430 calcium compound Drugs 0.000 claims description 20
- 150000001674 calcium compounds Chemical class 0.000 claims description 20
- 229910001463 metal phosphate Inorganic materials 0.000 claims description 19
- 150000002736 metal compounds Chemical class 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 15
- 239000011575 calcium Substances 0.000 claims description 12
- 230000029142 excretion Effects 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 150000003018 phosphorus compounds Chemical class 0.000 claims description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- 239000011574 phosphorus Substances 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 6
- 239000000920 calcium hydroxide Substances 0.000 claims description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 6
- 239000003337 fertilizer Substances 0.000 claims description 6
- -1 aluminum compound Chemical class 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 4
- 241001465754 Metazoa Species 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 150000003017 phosphorus Chemical class 0.000 claims description 2
- 241000283690 Bos taurus Species 0.000 claims 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims 1
- 229910052791 calcium Inorganic materials 0.000 claims 1
- 235000021317 phosphate Nutrition 0.000 description 46
- 238000004140 cleaning Methods 0.000 description 8
- 239000010802 sludge Substances 0.000 description 8
- 239000010440 gypsum Substances 0.000 description 6
- 229910052602 gypsum Inorganic materials 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 4
- 239000001506 calcium phosphate Substances 0.000 description 4
- 229910000389 calcium phosphate Inorganic materials 0.000 description 4
- 235000011010 calcium phosphates Nutrition 0.000 description 4
- 239000010840 domestic wastewater Substances 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 238000000247 postprecipitation Methods 0.000 description 4
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 4
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000005273 aeration Methods 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
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 230000010261 cell growth Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 241000549173 Celastrus scandens Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 229910052586 apatite Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- GFIKIVSYJDVOOZ-UHFFFAOYSA-L calcium;fluoro-dioxido-oxo-$l^{5}-phosphane Chemical compound [Ca+2].[O-]P([O-])(F)=O GFIKIVSYJDVOOZ-UHFFFAOYSA-L 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910000398 iron phosphate Inorganic materials 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/20—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium
-
- 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
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S426/00—Food or edible material: processes, compositions, and products
- Y10S426/807—Poultry or ruminant feed
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Removal Of Specific Substances (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Detergent Compositions (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7905111A NL7905111A (nl) | 1979-06-30 | 1979-06-30 | Werkwijze voor het chemisch verwijderen van fosfor- verbindingen uit afvalwater en werkwijze voor het zuiveren van afvalwater. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH650755A5 true CH650755A5 (de) | 1985-08-15 |
Family
ID=19833453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH4927/80A CH650755A5 (de) | 1979-06-30 | 1980-06-26 | Verfahren fuer die chemische ausscheidung von phosphorverbindungen aus abwasser und verfahren fuer die reinigung von abwasser. |
Country Status (18)
| Country | Link |
|---|---|
| US (1) | US4507207A (https=) |
| JP (1) | JPS567684A (https=) |
| BE (1) | BE884020A (https=) |
| BR (1) | BR8004073A (https=) |
| CA (1) | CA1151323A (https=) |
| CH (1) | CH650755A5 (https=) |
| DE (1) | DE3023968A1 (https=) |
| ES (1) | ES492870A0 (https=) |
| FI (1) | FI802034A7 (https=) |
| FR (1) | FR2460278A1 (https=) |
| GB (1) | GB2053884B (https=) |
| IN (1) | IN153069B (https=) |
| IT (1) | IT1146160B (https=) |
| NL (2) | NL7905111A (https=) |
| NO (1) | NO801954L (https=) |
| SE (1) | SE8004705L (https=) |
| YU (1) | YU166380A (https=) |
| ZA (1) | ZA803756B (https=) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3127570A1 (de) * | 1981-07-13 | 1983-04-28 | Mecapec S.A., 8716 Schmerikon | Verfahrung und einrichtung zur flockungsfiltration von abwasser |
| DE3442535A1 (de) * | 1984-10-12 | 1986-04-17 | Heinz Dorr Deponienbetrieb GmbH, 8960 Kempten | Verfahren zur reinigung des ueberstandwassers von faekalienschlaemmen insbesondere aus hausklaeranlagen |
| JPS6190418U (https=) * | 1984-11-21 | 1986-06-12 | ||
| JPS61164696A (ja) * | 1985-01-16 | 1986-07-25 | Ebara Infilco Co Ltd | 流動層式脱リン方法 |
| EP0291556A1 (de) * | 1987-05-22 | 1988-11-23 | Kernforschungszentrum Karlsruhe Gmbh | Verfahren zur Entfernung von Phosphat aus Wässern |
| DK634588D0 (da) * | 1988-11-14 | 1988-11-14 | Nordiske Kabel Traad | Fremgangsmaade til fjernelse af phosphat fra vand og anlaeg til brug ved fremgangsmaaden |
| DE4009082A1 (de) * | 1990-03-21 | 1991-09-26 | Aquamot Ag | Verfahren zur reinigung von industriellen, landwirtschaftlichen oder privaten abwaessern von ihren verunreinigungen an ammoniumverbindungen |
| FI89616C (fi) * | 1991-02-08 | 1993-10-25 | Partek Ab | Foerfarande foer minskning av fosfor- och tungmetallbelastningen i vattendrag, vilken belastning foerorsakas av odlingsmarker |
| DE69308311T2 (de) | 1992-09-18 | 1997-09-11 | Krueger As I | Methode zur reinigung von metallhaltigen wässrigen flüssigkeiten und methode zur herstellung eines adsorbens |
| US5665241A (en) * | 1994-03-18 | 1997-09-09 | Hazama Corporation | Dephosphorizing material and dephosphorizing method |
| DE19541479C1 (de) * | 1995-11-07 | 1997-03-13 | Poligrat Holding Gmbh | Verfahren zur Aufbereitung von Phosphorsäure |
| RU2164895C2 (ru) * | 1999-06-21 | 2001-04-10 | Открытое акционерное общество "Нижнекамскнефтехим" | Способ очистки сточных вод от соединений алюминия |
| US6942809B2 (en) * | 2003-06-13 | 2005-09-13 | Ip Holdings, L.L.C. | Method for treating soybean refinery wastewater |
| US7252765B2 (en) * | 2004-03-01 | 2007-08-07 | Black & Veatch Holding Co. | Process for improving phosphorous removal in waste water treatment without chemical addition |
| CN116884530A (zh) * | 2023-06-09 | 2023-10-13 | 惟创环境科技有限公司 | 一种基于自学习系统的精准加药除磷的方法 |
| CN118344172B (zh) * | 2024-04-02 | 2026-04-21 | 河北工业大学 | 一种高效净化含磷废水的功能陶粒、制备方法及应用 |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3562015A (en) * | 1968-07-05 | 1971-02-09 | Lancy Lab | Treatment of phosphate type carry-over on metal workpieces |
| US3523889A (en) * | 1968-11-26 | 1970-08-11 | American Sugar | Method and apparatus for separating liquids from solids |
| US3650686A (en) * | 1969-08-18 | 1972-03-21 | Monsanto Co | Process for recovery of phosphorous values from dilute plant effluents |
| US3617569A (en) * | 1970-07-31 | 1971-11-02 | Dow Chemical Co | Removal of phosphate from waste water |
| CA962386A (en) * | 1971-04-13 | 1975-02-04 | Canadair Limited | Liquid treatment plant and process particularly for waste water |
| US3728253A (en) * | 1971-05-05 | 1973-04-17 | Univ California | Accelerated biological-chemical wastewater treatment |
| US3733265A (en) * | 1971-11-22 | 1973-05-15 | Atomic Energy Commission | Cross-flow filtration process for removal of total organic carbon and phosphates from aqueous sewage effluents |
| US3827984A (en) * | 1972-06-01 | 1974-08-06 | Gullhoegens Bruk Ab | Precipitating agent for water purification processes,and a method of preparing same |
| SU539844A1 (ru) * | 1973-05-23 | 1976-12-25 | Предприятие П/Я Р-6913 | Способ очистки сточных вод,содержащих растворенные фосфаты |
| JPS5425749B2 (https=) * | 1973-12-07 | 1979-08-30 | ||
| GB1478345A (en) * | 1974-04-10 | 1977-06-29 | Ebara Infilco | Process for purifying water containing suspended matter |
| JPS50152544A (https=) * | 1974-05-29 | 1975-12-08 | ||
| US3965002A (en) * | 1975-04-02 | 1976-06-22 | Betz Laboratories, Inc. | Process for reducing dissolved inorganic orthophosphates to PPB levels in aqueous systems |
| FR2339575A1 (fr) * | 1976-01-30 | 1977-08-26 | Degremont | Procede et installation de traitement des eaux par precipitation cristalline et decantation |
| US4167479A (en) * | 1976-10-08 | 1979-09-11 | Ferdinand Besik | Process for purifying waste waters |
| US4145282A (en) * | 1977-01-24 | 1979-03-20 | Andco Industries, Inc. | Process for purifying waste water containing fluoride ion |
-
1979
- 1979-06-30 NL NL7905111A patent/NL7905111A/nl not_active Application Discontinuation
-
1980
- 1980-06-21 NL NL8003600A patent/NL8003600A/nl not_active Application Discontinuation
- 1980-06-24 ZA ZA00803756A patent/ZA803756B/xx unknown
- 1980-06-25 FI FI802034A patent/FI802034A7/fi not_active Application Discontinuation
- 1980-06-25 GB GB8020822A patent/GB2053884B/en not_active Expired
- 1980-06-25 SE SE8004705A patent/SE8004705L/xx not_active Application Discontinuation
- 1980-06-26 CH CH4927/80A patent/CH650755A5/de not_active IP Right Cessation
- 1980-06-26 DE DE19803023968 patent/DE3023968A1/de not_active Withdrawn
- 1980-06-26 BE BE0/201185A patent/BE884020A/nl not_active IP Right Cessation
- 1980-06-27 IT IT4910680A patent/IT1146160B/it active
- 1980-06-27 NO NO801954A patent/NO801954L/no unknown
- 1980-06-27 FR FR8014358A patent/FR2460278A1/fr active Granted
- 1980-06-27 ES ES492870A patent/ES492870A0/es active Granted
- 1980-06-27 BR BR8004073A patent/BR8004073A/pt unknown
- 1980-06-28 IN IN745/CAL/80A patent/IN153069B/en unknown
- 1980-06-30 JP JP8906080A patent/JPS567684A/ja active Pending
- 1980-06-30 YU YU166380A patent/YU166380A/xx unknown
- 1980-06-30 CA CA000355129A patent/CA1151323A/en not_active Expired
-
1984
- 1984-06-21 US US06/623,226 patent/US4507207A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE3023968A1 (de) | 1981-01-29 |
| ZA803756B (en) | 1981-06-24 |
| NL7905111A (nl) | 1981-01-05 |
| CA1151323A (en) | 1983-08-02 |
| ES8104973A1 (es) | 1981-05-16 |
| IT8049106A0 (it) | 1980-06-27 |
| GB2053884A (en) | 1981-02-11 |
| NL8003600A (nl) | 1981-01-05 |
| IN153069B (https=) | 1984-05-26 |
| BE884020A (nl) | 1980-12-29 |
| FI802034A7 (fi) | 1981-01-01 |
| GB2053884B (en) | 1983-03-02 |
| FR2460278A1 (fr) | 1981-01-23 |
| NO801954L (no) | 1981-01-02 |
| IT1146160B (it) | 1986-11-12 |
| SE8004705L (sv) | 1980-12-31 |
| FR2460278B1 (https=) | 1984-12-28 |
| US4507207A (en) | 1985-03-26 |
| YU166380A (en) | 1983-02-28 |
| JPS567684A (en) | 1981-01-26 |
| BR8004073A (pt) | 1981-01-21 |
| ES492870A0 (es) | 1981-05-16 |
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