CA1040759A - Methods and apparatus for treating wastewater - Google Patents
Methods and apparatus for treating wastewaterInfo
- Publication number
- CA1040759A CA1040759A CA210,723A CA210723A CA1040759A CA 1040759 A CA1040759 A CA 1040759A CA 210723 A CA210723 A CA 210723A CA 1040759 A CA1040759 A CA 1040759A
- Authority
- CA
- Canada
- Prior art keywords
- wastewater
- chamber
- gas
- oxygenating
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 209
- 238000000034 method Methods 0.000 title claims description 37
- 230000001706 oxygenating effect Effects 0.000 claims abstract description 92
- 238000011282 treatment Methods 0.000 claims abstract description 53
- 239000007789 gas Substances 0.000 claims description 120
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 91
- 239000001301 oxygen Substances 0.000 claims description 91
- 229910052760 oxygen Inorganic materials 0.000 claims description 91
- 238000009825 accumulation Methods 0.000 claims description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 239000007788 liquid Substances 0.000 claims description 40
- 239000007787 solid Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000009877 rendering Methods 0.000 claims description 3
- 230000035508 accumulation Effects 0.000 description 46
- 238000002156 mixing Methods 0.000 description 32
- 230000003068 static effect Effects 0.000 description 30
- 230000008569 process Effects 0.000 description 23
- 239000010802 sludge Substances 0.000 description 19
- 238000005192 partition Methods 0.000 description 14
- 238000004090 dissolution Methods 0.000 description 13
- 238000005273 aeration Methods 0.000 description 10
- 238000013022 venting Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000002699 waste material Substances 0.000 description 8
- 239000012298 atmosphere Substances 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 238000006722 reduction reaction Methods 0.000 description 7
- 239000003570 air Substances 0.000 description 6
- 230000006735 deficit Effects 0.000 description 6
- 210000003141 lower extremity Anatomy 0.000 description 6
- 238000006213 oxygenation reaction Methods 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000005276 aerator Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000000994 depressogenic effect Effects 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 210000003414 extremity Anatomy 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 210000001364 upper extremity Anatomy 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 208000036366 Sensation of pressure Diseases 0.000 description 1
- QRSFFHRCBYCWBS-UHFFFAOYSA-N [O].[O] Chemical compound [O].[O] QRSFFHRCBYCWBS-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 229960003903 oxygen Drugs 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000002459 sustained effect Effects 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
- C02F3/1284—Mixing devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
- B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
- B01F23/23231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
- B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
- B01F23/23231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit
- B01F23/232312—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit the guiding constructions being baffles for guiding the flow up-and-down or from left-to-right
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
- B01F23/2334—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer
- B01F23/23341—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer with tubes surrounding the stirrer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/234—Surface aerating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/234—Surface aerating
- B01F23/2341—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere
- B01F23/23411—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere by cascading the liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/2366—Parts; Accessories
- B01F23/2368—Mixing receptacles, e.g. tanks, vessels or reactors, being completely closed, e.g. hermetically closed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
- B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
- B01F23/23761—Aerating, i.e. introducing oxygen containing gas in liquids
- B01F23/237612—Oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/75—Discharge mechanisms
- B01F35/751—Discharging by opening a gate, e.g. using discharge paddles
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
- C02F3/1289—Aeration by saturation under super-atmospheric pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/24—Activated sludge processes using free-fall aeration or spraying
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/26—Activated sludge processes using pure oxygen or oxygen-rich gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
-
- 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
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Microbiology (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
- Treatment Of Biological Wastes In General (AREA)
- Activated Sludge Processes (AREA)
- Rotary Pumps (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US41340973A | 1973-11-06 | 1973-11-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1040759A true CA1040759A (en) | 1978-10-17 |
Family
ID=23637112
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA210,723A Expired CA1040759A (en) | 1973-11-06 | 1974-10-03 | Methods and apparatus for treating wastewater |
| CA236,556A Expired CA1053766A (en) | 1973-11-06 | 1975-09-29 | Waterproof electrical connector |
| CA 244990 Expired CA1044603A (en) | 1973-11-06 | 1976-02-02 | Vane type orbital engine |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA236,556A Expired CA1053766A (en) | 1973-11-06 | 1975-09-29 | Waterproof electrical connector |
| CA 244990 Expired CA1044603A (en) | 1973-11-06 | 1976-02-02 | Vane type orbital engine |
Country Status (20)
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3983031A (en) * | 1975-04-02 | 1976-09-28 | Airco, Inc. | Methods and apparatus for controlling the supply of a feed gas to dissolution devices |
| DE3068364D1 (en) * | 1979-10-02 | 1984-08-02 | Union Carbide Corp | Apparatus for contacting liquid with a gas |
| CA1139463A (en) * | 1979-10-02 | 1983-01-11 | Jon G. Albertsson | Apparatus for contacting a liquid with a gas |
| FR2627864A1 (fr) * | 1988-02-29 | 1989-09-01 | Asulab Sa | Dispositif d'affichage pour instrument de mesure |
| US8899823B2 (en) | 2011-12-09 | 2014-12-02 | Advanced Stimulation Technology, Inc. | Gel hydration unit |
| CN103880154B (zh) * | 2014-02-17 | 2016-04-20 | 江苏亚洲环保有限公司 | 一种一体化富氧生物反应器 |
| CN108499413A (zh) * | 2018-06-15 | 2018-09-07 | 浙江乐匠新材料科技有限公司 | 一种水性涂料生产用调漆罐 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3371033A (en) * | 1965-08-11 | 1968-02-27 | Fmc Corp | Method of treating sewage and apparatus therefor |
| US3732160A (en) * | 1968-08-21 | 1973-05-08 | Research Corp | Submerged filter-horizontal flow mode |
-
1974
- 1974-09-18 SE SE7411730A patent/SE7411730L/xx unknown
- 1974-09-30 IT IT2791674A patent/IT1022500B/it active
- 1974-10-03 CA CA210,723A patent/CA1040759A/en not_active Expired
- 1974-10-10 NL NL7413332A patent/NL7413332A/xx unknown
- 1974-10-11 IL IL45829A patent/IL45829A/en unknown
- 1974-10-14 ES ES430997A patent/ES430997A1/es not_active Expired
- 1974-10-15 ZA ZA00746555A patent/ZA746555B/xx unknown
- 1974-10-18 AR AR25614674A patent/AR209918A1/es active
- 1974-10-23 FR FR7435591A patent/FR2249844B1/fr not_active Expired
- 1974-10-25 BE BE149904A patent/BE821507A/xx unknown
- 1974-10-29 GB GB4680674A patent/GB1450612A/en not_active Expired
- 1974-11-01 AU AU74956/74A patent/AU472869B2/en not_active Expired
- 1974-11-02 IN IN2401/CAL/74A patent/IN142402B/en unknown
- 1974-11-04 DE DE2452295A patent/DE2452295C3/de not_active Expired
- 1974-11-04 DD DD18213574A patent/DD116213A5/xx unknown
- 1974-11-05 CH CH1477774A patent/CH608470A5/xx not_active IP Right Cessation
- 1974-11-05 BR BR923174A patent/BR7409231A/pt unknown
- 1974-11-06 AT AT890674A patent/AT338708B/de not_active IP Right Cessation
- 1974-11-06 JP JP12790874A patent/JPS555398B2/ja not_active Expired
- 1974-11-06 PL PL1974175371A patent/PL92389B1/pl unknown
-
1975
- 1975-09-29 CA CA236,556A patent/CA1053766A/en not_active Expired
-
1976
- 1976-02-02 CA CA 244990 patent/CA1044603A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SE7411730L (enrdf_load_stackoverflow) | 1975-05-07 |
| IN142402B (enrdf_load_stackoverflow) | 1977-07-02 |
| ZA746555B (en) | 1975-11-26 |
| DE2452295C3 (de) | 1979-10-04 |
| GB1450612A (en) | 1976-09-22 |
| IL45829A (en) | 1977-03-31 |
| DE2452295B2 (de) | 1978-02-02 |
| DD116213A5 (enrdf_load_stackoverflow) | 1975-11-12 |
| JPS5079167A (enrdf_load_stackoverflow) | 1975-06-27 |
| AR209918A1 (es) | 1977-06-15 |
| PL92389B1 (enrdf_load_stackoverflow) | 1977-04-30 |
| FR2249844A1 (enrdf_load_stackoverflow) | 1975-05-30 |
| BR7409231A (pt) | 1976-05-11 |
| BE821507A (fr) | 1975-04-25 |
| IT1022500B (it) | 1978-03-20 |
| IL45829A0 (en) | 1974-12-31 |
| CH608470A5 (enrdf_load_stackoverflow) | 1979-01-15 |
| DE2452295A1 (de) | 1975-05-15 |
| AT338708B (de) | 1977-09-12 |
| NL7413332A (nl) | 1975-05-09 |
| FR2249844B1 (enrdf_load_stackoverflow) | 1979-08-03 |
| ES430997A1 (es) | 1977-01-16 |
| JPS555398B2 (enrdf_load_stackoverflow) | 1980-02-06 |
| AU472869B2 (en) | 1976-05-06 |
| ATA890674A (de) | 1976-12-15 |
| CA1053766A (en) | 1979-05-01 |
| CA1044603A (en) | 1978-12-19 |
| AU7495674A (en) | 1976-05-06 |
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