SI9110668B - Postopek za obdelavo vode, ki vsebuje žveplove spojine - Google Patents
Postopek za obdelavo vode, ki vsebuje žveplove spojine Download PDFInfo
- Publication number
- SI9110668B SI9110668B SI9110668A SI9110668A SI9110668B SI 9110668 B SI9110668 B SI 9110668B SI 9110668 A SI9110668 A SI 9110668A SI 9110668 A SI9110668 A SI 9110668A SI 9110668 B SI9110668 B SI 9110668B
- Authority
- SI
- Slovenia
- Prior art keywords
- sulphide
- water
- process according
- reactor
- sludge
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract 17
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical class [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract 12
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract 38
- 239000010802 sludge Substances 0.000 claims abstract 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract 8
- 239000005416 organic matter Substances 0.000 claims abstract 5
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract 4
- 150000004763 sulfides Chemical class 0.000 claims abstract 4
- 239000002351 wastewater Substances 0.000 claims abstract 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract 3
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract 3
- 229910021653 sulphate ion Inorganic materials 0.000 claims abstract 3
- 229910052751 metal Inorganic materials 0.000 claims abstract 2
- 239000002184 metal Substances 0.000 claims abstract 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims abstract 2
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 claims abstract 2
- 150000003464 sulfur compounds Chemical class 0.000 claims 4
- -1 sulfide ions Chemical class 0.000 claims 3
- 229910052717 sulfur Inorganic materials 0.000 claims 3
- 239000011593 sulfur Substances 0.000 claims 3
- 150000002500 ions Chemical class 0.000 claims 2
- 241001148470 aerobic bacillus Species 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 239000012876 carrier material Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 229910021645 metal ion Inorganic materials 0.000 claims 1
- 229910052976 metal sulfide Inorganic materials 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 238000001556 precipitation Methods 0.000 claims 1
- 238000000746 purification Methods 0.000 claims 1
- 239000008213 purified water Substances 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 241000894006 Bacteria Species 0.000 abstract 1
- 239000002028 Biomass Substances 0.000 abstract 1
- 239000005864 Sulphur Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 230000001376 precipitating effect Effects 0.000 abstract 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
- C02F3/06—Aerobic processes using submerged filters
-
- 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
- C02F3/30—Aerobic and anaerobic processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/06—Preparation of sulfur; Purification from non-gaseous sulfides or materials containing such sulfides, e.g. ores
-
- 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
- C02F3/28—Anaerobic digestion processes
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/345—Biological treatment of water, waste water, or sewage characterised by the microorganisms used for biological oxidation or reduction of sulfur compounds
-
- 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
-
- 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
- Y10S210/00—Liquid purification or separation
- Y10S210/902—Materials removed
- Y10S210/903—Nitrogenous
-
- 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
- Y10S210/00—Liquid purification or separation
- Y10S210/902—Materials removed
- Y10S210/911—Cumulative poison
- Y10S210/912—Heavy metal
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- Molecular Biology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Removal Of Specific Substances (AREA)
- Physical Water Treatments (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Water Treatment By Sorption (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
- External Artificial Organs (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Claims (16)
- -1- PATENTNI ZAHTEVKI 1. Postopek za prečiščevanje vode, ki vsebuje sulfid, pri katerem se sulfid v reaktorju v bistvu oksidira v elementarno žveplo ob uporabi mulja, ki vsebuje aerobne bakterije v obliki biofilmov, ki so vezani na nosilni material, označen s tem, da se v reaktorju uporablja polnitev mulja s sulfidi z najmanj 10 mg sulfida na mg v mulju prisotnega dušika na uro, pri čemer je polnitev mulja izračunana na osnovi deleža mulja, ki oksidira sulfid, v katerem se, če voda ne vsebuje nobene organske snovi, uporablja polnitev mulja s sulfidi z najmanj 20 mg sulfida na mg v mulju prisotnega dušika na uro, ali se, če voda vsebuje organsko snov, uporablja površinska polnitev s sulfidi z najmanj a 10 g sulfida na sr površine biofilma na dan.
- 2. Postopek v skladu z zahtevkom 1, pri katerem se, če voda ne vsebuje nobene organske snovi, uporablja polnitev mulja s sulfidi z najmanj 30 mg, zlasti najmanj 35 mg sulfida na mg v mulju prisotnega dušika na uro, ali se, če voda vsebuje organsko snov, uporablja površinska polnitev s sulfidi z najmanj 20 g sulfida na m2 površine biofilma na dan.
- 3. Postopek v skladu z zahtevkom 1 ali 2, pri katerem je koncentracija kisika v reaktorju naravnana na vrednost v območju od 0,1 - 9,0 mg/1, prednostno približno 4 mg/1.
- 4. Postopek v skladu s katerimkoli od zahtevkov 1 do 3, pri katerem se koncentracija sulfida v iztoku iz aerobnega reaktorja vzdržuje v območju od 0,5 - 30 mg/1.
- 5. Postopek za čiščenje vode, ki vsebuje sulfid, označen s tem, da (a) se najmanj en del sulfida oksidira v prvem aerobnem S). reaktorju v elementarno žveplo ob uporabi postopka v skladu s katerimkoli od zahtevkov 1 do 4, ki mu po izbiri sledi separacija dela elementarnega žvepla; b) se tekočina, dobljena v fazi a) , dovaja v drugi aerobni reaktor, v čemer se vsako preostalo žveplo in vsak sulfid oksidira v sulfat.
- 6. Postopek v skladu z zahtevkom 5, pri katerem se v reaktorju, v katerem se sulfid oksidira, uporablja polnitev s sulfidi z najmanj 25 mg S/l.h.
- 7. Postopek v skladu s katerimkoli od zahtevkov 1-6, pri katerem se v reaktorju, v katerem se sulfid oksidira, uporablja polnitev s sulfidi z najmanj 50 mg S/l.h, posebno polnitev s sulfidi s 100 do 1000 mg S/l.h.
- 8. Postopek za anaerobno obdelovanje odpadne vode z visoko vsebnostjo žveplovih spojin, pri katerem se žveplove spojine reducirajo v sulfid med anaerobnim obdelovanjem in se sulfid naknadno odstrani, označen s tem, da se sulfid odstrani z uporabo postopka v skladu s katerimkoli od zahtevkov 1 do 7.
- 9. Postopek v skladu z zahtevkom 8, pri ka teren se po odstranitvi sulfida en del očiščene vode spelje nazaj v odpadno vodo, ki jo je treba obdelati.
- 10. Postopek v skladu z zahtevkom 9, pri katerem je del očiščene vode, ki je speljan nazaj tako velik, da se vsebnost žvepla med anaerobnim obdelovanjem vzdržuje pod 800 mg S/l, prednostno pod 350 mg S/l.
- 11. Postopek v skladu s katerimkoli od zahtevkov 8 - 10 za obdelovanje vode, ki vsebuje sulfat, sulfit in/ali tiosulfat. -3-
- 12. Postopek za odstranjevanje ionov težkih kovin iz vode, ki lahko tudi vsebuje žveplove spojine, pri katerem se poskrbi, da voda vsebuje sulfidne ione, ki reagirajo s kovinskimi ioni, da se tvorijo kovinski sulfidi, označen s tem, da se preostaja joči sulfid oksidira v elementarno žveplo v aerobni fazi ob uporabi postopka v skladu s katerimkoli od zahtevkov 1 do 7.
- 13. Postopek v skladu z zahtevkom 12, pri katerem voda vsebuje sulfidne ione kot rezultat anaerobne redukcije v vodi že prisotnih in/ali vodi dodanih žveplovih spojin.
- 14. Postopek v skladu z zahtevkom 13, pri katerem se med anaerobno redukcijo uporablja neko razmerje žveplo/kovina, ki je zadostno, da zagotavlja v bistvu popolno obarjanje ionov težkih kovin.
- 15. Postopek v skladu s katerimkoli od zahtevkov 12 - 14, pri katerem se v aerobni fazi vzdržuje negativni redoks potencial pod -100 mV.
- 16. Postopek v skladu s katerimkoli od zahtevkov 12 - 15, pri katerem se v aerobni fazi vzdržuje koncentracija sulfidnih ionov 0,1 - 50 mg/1, prednostno 1-10 mg/1. Za Paques B.V.T. de Boerstraat 11 NL-8561 EL Balk Nizozemska :
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL9000880A NL9000880A (nl) | 1990-04-12 | 1990-04-12 | Werkwijze voor het verwijderen van zwavelverbindingen en ionen van zware metalen uit water. |
| NL9000878A NL9000878A (nl) | 1990-04-12 | 1990-04-12 | Werkwijze voor de zuivering van sulfidehoudend afvalwater. |
| NL9000879A NL9000879A (nl) | 1990-04-12 | 1990-04-12 | Werkwijze voor de zuivering van sulfidehoudend afvalwater. |
| NL9000877A NL9000877A (nl) | 1990-04-12 | 1990-04-12 | Werkwijze voor het anaeroob zuiveren van afvalwater met een hoog gehalte aan zwavelverbindingen en inrichting voor het uitvoeren van deze werkwijze. |
| YU66891A YU66891A (sh) | 1990-04-12 | 1991-04-12 | Postupak za prečišćavanje vode koja sadrži sumporna jedinjenja |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SI9110668A SI9110668A (en) | 1996-02-29 |
| SI9110668B true SI9110668B (sl) | 1999-08-31 |
Family
ID=27483929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SI9110668A SI9110668B (sl) | 1990-04-12 | 1991-04-12 | Postopek za obdelavo vode, ki vsebuje žveplove spojine |
Country Status (24)
| Country | Link |
|---|---|
| US (2) | US5366633A (sl) |
| EP (1) | EP0477338B1 (sl) |
| KR (1) | KR100196556B1 (sl) |
| AT (1) | ATE108422T1 (sl) |
| AU (1) | AU639561B2 (sl) |
| BG (1) | BG61072B1 (sl) |
| BR (1) | BR9105710A (sl) |
| BY (1) | BY2005C1 (sl) |
| CA (1) | CA2057861C (sl) |
| CZ (1) | CZ284751B6 (sl) |
| DE (1) | DE69102848T2 (sl) |
| DK (1) | DK0477338T3 (sl) |
| ES (1) | ES2056647T3 (sl) |
| FI (1) | FI101290B1 (sl) |
| HU (1) | HU213847B (sl) |
| LV (1) | LV11024B (sl) |
| NO (1) | NO302942B1 (sl) |
| PL (1) | PL168378B1 (sl) |
| RO (1) | RO108674B1 (sl) |
| RU (1) | RU2079450C1 (sl) |
| SI (1) | SI9110668B (sl) |
| SK (1) | SK280745B6 (sl) |
| WO (1) | WO1991016269A1 (sl) |
| YU (1) | YU66891A (sl) |
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2108982C1 (ru) * | 1992-05-26 | 1998-04-20 | Паквес Б.В. | Способ удаления соединений серы из воды (варианты) и способ обработки серусодержащего дымового газа |
| GB9216457D0 (en) * | 1992-08-03 | 1992-09-16 | Wrc Plc | Treatment of sewage sludge |
| NO176837B1 (no) * | 1992-12-30 | 1995-06-07 | Yara Int Asa | Fremgangsmate for a fjerne hydrogensulfid fra oljeholdig vann |
| NL9301000A (nl) * | 1993-06-10 | 1995-01-02 | Pacques Bv | Werkwijze voor de zuivering van sulfidehoudend afvalwater. |
| FR2717460B1 (fr) * | 1994-03-21 | 1996-05-15 | Omnium Traitement Valorisa | Procédé et installation de traitement d'effluents chargés en matière organique, notamment par oxydation en milieu humide, avec recyclage interne des résidus solides. |
| NL9401036A (nl) * | 1994-06-23 | 1996-02-01 | Tno | Anaerobe verwijdering van zwavelverbindingen uit afvalwater. |
| NL9500577A (nl) * | 1995-03-24 | 1996-11-01 | Pacques Bv | Werkwijze voor het reinigen van gassen. |
| US5587079A (en) * | 1995-04-21 | 1996-12-24 | Rowley; Michael V. | Process for treating solutions containing sulfate and metal ions. |
| WO1997029055A1 (en) * | 1996-02-06 | 1997-08-14 | Thiopaq Sulfur Systems B.V. | Process for the treatment of water containing heavy metal ions |
| CA2253936C (en) * | 1996-05-10 | 2006-01-31 | Paques Bio Systems B.V. | Process for the purification of gases containing hydrogen sulphide |
| US6045695A (en) * | 1996-07-29 | 2000-04-04 | Paques Bio Systems B.V. | Biological treatment of spent caustics |
| US6136193A (en) * | 1996-09-09 | 2000-10-24 | Haase; Richard Alan | Process of biotreating wastewater from pulping industries |
| EP0845288A1 (en) * | 1996-11-27 | 1998-06-03 | Thiopaq Sulfur Systems B.V. | Process for biological removal of sulphide |
| RU2107042C1 (ru) * | 1997-01-22 | 1998-03-20 | Галина Александровна Шугина | Способ очистки загрязненных подземных вод |
| US5705072A (en) * | 1997-02-03 | 1998-01-06 | Haase; Richard Alan | Biotreatment of wastewater from hydrocarbon processing units |
| DE19716939C2 (de) * | 1997-04-23 | 2002-06-27 | Bernd Diering | Verfahren und Abwasserbehandlungsanlage zur biologischen Aufbereitung von farbstoffhaltigen Abwässern aus der Textil- und Lederindustrie |
| US6852305B2 (en) * | 1998-11-16 | 2005-02-08 | Paques Bio Systems B.V. | Process for the production of hydrogen sulphide from elemental sulphur and use thereof in heavy metal recovery |
| DE10221362C5 (de) * | 2002-05-07 | 2009-05-07 | Friedrich, Michael, Dipl.-Ing. | Verfahren zur Oxidation von in Abwasser gelöstem Sulfid |
| US7285216B2 (en) * | 2002-05-17 | 2007-10-23 | Water Research Commission | Treatment of water |
| US20080190844A1 (en) * | 2007-02-13 | 2008-08-14 | Richard Alan Haase | Methods, processes and apparatus for biological purification of a gas, liquid or solid; and hydrocarbon fuel from said processes |
| CA2713265A1 (en) * | 2008-02-13 | 2009-08-20 | Shell Internationale Research Maatschappij B.V. | Method and apparatus for biological treatment of spent caustic |
| US8277648B2 (en) * | 2010-05-24 | 2012-10-02 | Safe Mines And Waterways, Llc | Remediation system for transition metal ions and method for same |
| US20130157334A1 (en) * | 2011-12-19 | 2013-06-20 | Shell Oil Company | Process for converting a lignocellulosic biomass |
| JP6164102B2 (ja) * | 2014-01-24 | 2017-07-19 | 新日鐵住金株式会社 | 排水処理方法 |
| US9902975B2 (en) * | 2014-02-03 | 2018-02-27 | Paqell B.V. | Process for the biological conversion of bisulphide into elemental sulphur |
| US10414680B2 (en) | 2014-07-18 | 2019-09-17 | Water Research Commission | Method for the biological treatment of sulphate containing waste water, via reduction of sulphate to sulphide then its oxidation to elemental sulphur |
| CN108602704B (zh) * | 2016-04-20 | 2022-01-18 | 环球油品公司 | 用于含硫化氢的废水和地下水的生物硫化物氧化的非汽提式生物反应器 |
| US10538444B2 (en) * | 2016-12-21 | 2020-01-21 | Uop Llc | Digestion of elemental sulfur in bioreactor during biological oxidation of sulfide in wastewater and groundwater |
| CA3134120A1 (en) | 2018-06-28 | 2020-01-02 | Aquacycl Llc | Scalable continuous flow microbial fuel cells |
| FI3824136T3 (fi) * | 2018-07-19 | 2023-05-25 | Stora Enso Oyj | Menetelmä natriumin ja rikin pitoisuuksien hallitsemiseksi selluloosatehtaassa |
| US11552322B2 (en) | 2018-07-24 | 2023-01-10 | Aquacycl, Inc. | Branched anodes for microbial fuel cells |
| EP3931311A4 (en) | 2019-02-27 | 2022-12-14 | Aquacycl LLC | SCALABLE FLOATING MICRO-AERATION UNIT, DEVICES AND METHODS |
| US11604482B2 (en) | 2020-03-16 | 2023-03-14 | Aquacycl, Inc. | Fluid flow control for water treatment systems |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7908138A (nl) * | 1979-11-07 | 1981-06-01 | Gist Brocades Nv | Werkwijze voor het bereiden en in stand houden van biomassa op drager. |
| NL8006094A (nl) * | 1980-11-07 | 1982-06-01 | Landbouw Hogeschool | Werkwijze voor het zuiveren van afvalwater en/of afvalwaterslib. |
| US4537682A (en) * | 1982-01-29 | 1985-08-27 | Environmental Research & Technology | Activated sludge wastewater treating process |
| US4584271A (en) * | 1983-09-28 | 1986-04-22 | Joy Manufacturing Company | Bacterial regeneration apparatus and process |
| US4522723A (en) * | 1984-06-01 | 1985-06-11 | Kerr-Mcgee Corporation | Process for the removal and recovery of heavy metals from aqueous solutions |
-
1991
- 1991-04-11 AT AT91907891T patent/ATE108422T1/de not_active IP Right Cessation
- 1991-04-11 RO RO148928A patent/RO108674B1/ro unknown
- 1991-04-11 AU AU76837/91A patent/AU639561B2/en not_active Ceased
- 1991-04-11 CA CA 2057861 patent/CA2057861C/en not_active Expired - Fee Related
- 1991-04-11 EP EP91907891A patent/EP0477338B1/en not_active Expired - Lifetime
- 1991-04-11 DE DE69102848T patent/DE69102848T2/de not_active Expired - Fee Related
- 1991-04-11 ES ES91907891T patent/ES2056647T3/es not_active Expired - Lifetime
- 1991-04-11 US US07/775,991 patent/US5366633A/en not_active Expired - Lifetime
- 1991-04-11 HU HU913895A patent/HU213847B/hu not_active IP Right Cessation
- 1991-04-11 DK DK91907891T patent/DK0477338T3/da active
- 1991-04-11 BR BR9105710A patent/BR9105710A/pt not_active IP Right Cessation
- 1991-04-11 PL PL91293028A patent/PL168378B1/pl not_active IP Right Cessation
- 1991-04-11 KR KR1019910701830A patent/KR100196556B1/ko not_active IP Right Cessation
- 1991-04-11 RU SU915010587A patent/RU2079450C1/ru not_active IP Right Cessation
- 1991-04-11 WO PCT/NL1991/000059 patent/WO1991016269A1/en active IP Right Grant
- 1991-04-12 YU YU66891A patent/YU66891A/sh unknown
- 1991-04-12 SK SK1039-91A patent/SK280745B6/sk unknown
- 1991-04-12 SI SI9110668A patent/SI9110668B/sl unknown
- 1991-04-12 CZ CS911039A patent/CZ284751B6/cs not_active IP Right Cessation
- 1991-12-02 FI FI915681A patent/FI101290B1/fi not_active IP Right Cessation
- 1991-12-06 NO NO914804A patent/NO302942B1/no unknown
- 1991-12-11 BG BG95615A patent/BG61072B1/bg unknown
-
1993
- 1993-06-28 LV LVP-93-710A patent/LV11024B/lv unknown
- 1993-11-18 BY BY1319A patent/BY2005C1/xx unknown
- 1993-12-15 US US08/166,840 patent/US5449460A/en not_active Expired - Lifetime
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