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)
- Health & Medical Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (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)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (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)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- External Artificial Organs (AREA)
- Medical Preparation Storing Or Oral Administration Devices (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 |
|---|---|---|---|
| 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. |
| 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. |
| NL9000880A NL9000880A (nl) | 1990-04-12 | 1990-04-12 | Werkwijze voor het verwijderen van zwavelverbindingen en ionen van zware metalen uit water. |
| 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) | FI101290B (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 (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092152C (zh) * | 1992-05-26 | 2002-10-09 | 帕克斯 | 除去水中含硫化合物的方法 |
| NL9200927A (nl) | 1992-05-26 | 1993-12-16 | Pacques Bv | Werkwijze voor het verwijderen van zwavelverbindingen uit water. |
| 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. |
| AU719886B2 (en) * | 1996-02-06 | 2000-05-18 | Thiopaq Sulfur Systems B.V. | Process for the treatment of water containing heavy metal ions |
| WO1997043033A1 (en) * | 1996-05-10 | 1997-11-20 | Paques Bio Systems B.V. | Process for the purification of gases containing hydrogen sulphide |
| CN1155526C (zh) * | 1996-07-29 | 2004-06-30 | 帕克斯生物系统公司 | 废碱液的生物处理方法 |
| 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 |
| DE102006038207A1 (de) * | 2006-08-16 | 2008-02-21 | Siemens Ag | Verfahren zur Entfernung von Sulfat und Schwermetallen aus Abwasser |
| 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 |
| RU2359923C1 (ru) * | 2008-01-09 | 2009-06-27 | Евгений Борисович Баглай | Способ биохимической очистки сточных вод и установка для его осуществления |
| WO2009101090A1 (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 |
| MX385998B (es) * | 2014-02-03 | 2025-03-18 | Paqell B V | Proceso para la conversión biológica de bisulfuro en azufre elemental. |
| EP3169633B1 (en) | 2014-07-18 | 2022-07-06 | Water Research Commission | Method for the treatment of sulphate containing waste water |
| EP3445725A4 (en) * | 2016-04-20 | 2019-11-20 | Uop Llc | NON-EXTRACTION BIOREACTOR FOR BIOLOGICAL OXIDATION OF SULFIDE IN WASTEWATER |
| 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 |
| US10570039B2 (en) | 2018-06-28 | 2020-02-25 | Aquacycl Llc | Scalable continuous flow microbial fuel cells |
| WO2020016241A1 (en) * | 2018-07-19 | 2020-01-23 | Stora Enso Oyj | A process for controlling the sodium and sulfur balance in a pulp mill |
| US11552322B2 (en) | 2018-07-24 | 2023-01-10 | Aquacycl, Inc. | Branched anodes for microbial fuel cells |
| IL285893B2 (en) | 2019-02-27 | 2025-10-01 | Aquacycl Llc | Scaled floating micro-aerospace 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 RO RO148928A patent/RO108674B1/ro unknown
- 1991-04-11 ES ES91907891T patent/ES2056647T3/es not_active Expired - Lifetime
- 1991-04-11 BR BR9105710A patent/BR9105710A/pt not_active IP Right Cessation
- 1991-04-11 DK DK91907891T patent/DK0477338T3/da active
- 1991-04-11 AU AU76837/91A patent/AU639561B2/en not_active Ceased
- 1991-04-11 RU SU915010587A patent/RU2079450C1/ru not_active IP Right Cessation
- 1991-04-11 KR KR1019910701830A patent/KR100196556B1/ko not_active Expired - Fee Related
- 1991-04-11 PL PL91293028A patent/PL168378B1/pl not_active IP Right Cessation
- 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 HU HU913895A patent/HU213847B/hu not_active IP Right Cessation
- 1991-04-11 US US07/775,991 patent/US5366633A/en not_active Expired - Lifetime
- 1991-04-11 AT AT91907891T patent/ATE108422T1/de not_active IP Right Cessation
- 1991-04-11 CA CA 2057861 patent/CA2057861C/en not_active Expired - Fee Related
- 1991-04-11 WO PCT/NL1991/000059 patent/WO1991016269A1/en not_active Ceased
- 1991-04-12 SI SI9110668A patent/SI9110668B/sl unknown
- 1991-04-12 SK SK1039-91A patent/SK280745B6/sk unknown
- 1991-04-12 CZ CS911039A patent/CZ284751B6/cs not_active IP Right Cessation
- 1991-04-12 YU YU66891A patent/YU66891A/sh unknown
- 1991-12-02 FI FI915681A patent/FI101290B/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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