KR920702670A - 황화합물을 함유하는 폐수의 처리 방법 - Google Patents
황화합물을 함유하는 폐수의 처리 방법Info
- Publication number
- KR920702670A KR920702670A KR1019910701830A KR910701830A KR920702670A KR 920702670 A KR920702670 A KR 920702670A KR 1019910701830 A KR1019910701830 A KR 1019910701830A KR 910701830 A KR910701830 A KR 910701830A KR 920702670 A KR920702670 A KR 920702670A
- Authority
- KR
- South Korea
- Prior art keywords
- sulfide
- wastewater
- sulfides
- sludge
- sulfur
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 30
- 239000002351 wastewater Substances 0.000 title claims 14
- 150000003464 sulfur compounds Chemical class 0.000 title claims 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 18
- 229910001385 heavy metal Inorganic materials 0.000 claims description 3
- 150000004763 sulfides Chemical class 0.000 claims 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 9
- 239000010802 sludge Substances 0.000 claims 9
- 229910052717 sulfur Inorganic materials 0.000 claims 5
- 239000011593 sulfur Substances 0.000 claims 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 4
- 230000001590 oxidative effect Effects 0.000 claims 3
- -1 sulfide ions Chemical class 0.000 claims 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 2
- 150000002500 ions Chemical class 0.000 claims 2
- 239000007788 liquid Substances 0.000 claims 2
- 229910052757 nitrogen Inorganic materials 0.000 claims 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims 1
- 241001148470 aerobic bacillus Species 0.000 claims 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 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
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal 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
- 238000000746 purification Methods 0.000 claims 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims 1
- 229910021653 sulphate ion Inorganic materials 0.000 claims 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 claims 1
- 238000004065 wastewater treatment Methods 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
- C02F3/06—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)
Abstract
내용 없음
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
황화물의 제거 방법을 제1도에 도식적으로 나타낸 바와 같이 폐수 처리 설비에서 실시할 수 있다, 본 발명의 중금속 제거 방법은 제2도에 도시된 장치로 실시할 수 있다.
Claims (25)
- 호기성 박테리아를 함유하는 슬러지를 이용하여 황화물을 반응기내에서 산화시키고, 시간당 슬러지내에 존재하는 질소 1㎎당 황화물을 산화하는 슬러지 비율을 근거로하여 존재하는 슬러지 로드를 측정하는 것을 특징으로 하는 황화물을 함유하는 폐수의 정제 방법.
- 제1항에 있어서, 시간당 슬러지내에 존재하는 질소 1㎎당 황화물 20㎎ 이상의 슬러지 로드를 사용하는 방법.
- 제1항에 있어서, 시간당 슬러지내에 존재하는 질소 질소 1㎎당 황화물 35㎎ 이상의 슬러지 로드를 사용하는 방법.
- 제1항 내지 제3항중 어느 한 항에 있어서, 반응기에서 사용되는 슬러지가 캐리어 물질에 결합되는 바이오 필름의 형태로 존재하는 방법.
- 제1항 내지 제4항중 어느 한 항에 있어서, 반응기내의 산소 농도를 0.1-9.0㎎/ℓ, 바람직하게는 약 4㎎/ℓ로 조절하는 방법.
- 제1항 내지 제5항중 어느 한 항에 있어서, 상기 황화물은 황 원소로 거의 산화되는 방법.
- 제1항 내지 제6항중 어느 한 항에 있어서, 호기성 반응기의 유출액의 황화물 농도를 0.5-30㎎/ℓ 내로 유지하는 방법.
- 제1항 내지 제7항중 어느 한 항에 있어서, 황화물 로드 10g/㎡,일 이상을 사용하는 방법.
- 제1항 내지 제8항중 어느 한 항에 있어서, 황화물 로드 50g/ℓ,h, 이상을 사용하는 방법.
- 제1항 내지 제8항중 어느 한 항에 있어서, 황화물 로드 50㎎ S/ℓ,h, 이상을 사용하는 방법.
- 제1항 내지 제10항중 어느 한 항에 있어서, a) 적어도 황화물 일부를 제1호기성 반응기내에서 황원소로 산화시키는 단계, b) 황원소 및 가능하게는 황화물과 다른 성분을 함유하는, 단계(a)에서 수득된 액체를 황 및 황화물 황산염으로 산화되는 제2호기성 반응기로 공급하는 단계를 포함하는 방법.
- (a) 적어도 황화물 일부를 황화물 로드 25㎎ S/ℓ.h 이상을 사용하는 제1호기성 반응기내에서 황원소로 산화시키는 단계, (b) 황 원소 및 가능하게는 황화물과 다른 성분을 함유하는 단계(a)에서 수득된 액체를 황 및 황화물이 황산염으로 산화되는 제2호기성 반응기로 공급하는 단계를 포함하는 황화물을 함유하는 폐수의 정제 방법.
- 제11항 또는 제12항에 있어서, 단계(a)에서 황화물 로드 25㎎ S/ℓ.h 이상을 사용하는 방법.
- 제11항 또는 제12항에 있어서, 단계(a)에서 황화물 로드 100-1000㎎ S/ℓ.h 이상을 사용하는 방법.
- 황 화물을 혐기성 처리시에 황화물로 환원시키고, 제1항 내지 제4항중 어느 한항의 방법을 이용하여 상기 황화물을 제거하는 것을 특징으로 하는 높은 함량의 황 화합물을 가지는 폐수의 혐기성 처리방법.
- 제15항에 있어서, 상기 황화물을 제거시킨후, 정제된 폐수의 일부를 폐수로 재순환하여 처리하는 방법.
- 제16항에 있어서, 상기 황화물을 혐기성 처리시에 800㎎ S/ℓ이하, 바람직하게는 350㎎ S/ℓ 이하로 유지하기 위하여 정제된 폐수의 일부를 재순환하는 방법.
- 제15항 내지 제17항중 어느 한 항에 있어서, 황산염을 함유하는 폐수를 처리하는 방법.
- 제15항 내지 제17항중 어느 한 항에 있어서, 아황산염을 함유하는 폐수를 처리하는 방법.
- 제15항 내지 제17항중 어느 한 항에 있어서, 티오황산염을 함유하는 폐수를 처리하는 방법.
- 폐수는 금속 이온과 반응하여 금속 황화물을 생성할 수 있도록 황화물 이온을 함유하게 하고, 제1항 내지 제14항중 어느 한항의 방법을 이용하여 호기성 단계에서 잔류 황화물을 황 원소로 산화시키는 것을 특징으로 하는 황화물을 또한 함유할 수 있는 폐수로부터 중금속 이온을 제거하는 방법.
- 제21항에 있어서, 상기 폐수는 이미 존재하거나, 및/또는 폐수에 첨가된 황화물의 혐기성 환원으로 인해 황화물 이온을 함유하는 방법.
- 제22항에 있어서, 상기 혐기성 환원시에 중금속 이온을 거의 완전하게 침전 시키기에 충분한 황/금속비를 사용하는 방법.
- 제21항 내지 제23항중 어느 한 항에 있어서, 상기 호기성 단계에서-100mV의 음의 산화환원 퍼텐셜을 유지하는 방법.
- 제21항 내지 제24항중 어느 한 항에 있어서, 상기 호기성 단계에서 황화물 이온의 농도를 0.1㎎/ℓ, 바람직하게는 1-10㎎/ℓ로 유지하는 방법.※ 참고사항: 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (8)
| 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. |
| NL9000880 | 1990-04-12 | ||
| NL9000879 | 1990-04-12 | ||
| NL9000877 | 1990-04-12 | ||
| 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. |
| NL9000878 | 1990-04-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR920702670A true KR920702670A (ko) | 1992-10-06 |
| KR100196556B1 KR100196556B1 (ko) | 1999-06-15 |
Family
ID=27483929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019910701830A KR100196556B1 (ko) | 1990-04-12 | 1991-04-11 | 황 화합물을 함유하는 폐수의 처리 방법 |
Country Status (24)
| Country | Link |
|---|---|
| US (2) | US5366633A (ko) |
| EP (1) | EP0477338B1 (ko) |
| KR (1) | KR100196556B1 (ko) |
| AT (1) | ATE108422T1 (ko) |
| AU (1) | AU639561B2 (ko) |
| BG (1) | BG61072B1 (ko) |
| BR (1) | BR9105710A (ko) |
| BY (1) | BY2005C1 (ko) |
| CA (1) | CA2057861C (ko) |
| CZ (1) | CZ284751B6 (ko) |
| DE (1) | DE69102848T2 (ko) |
| DK (1) | DK0477338T3 (ko) |
| ES (1) | ES2056647T3 (ko) |
| FI (1) | FI101290B1 (ko) |
| HU (1) | HU213847B (ko) |
| LV (1) | LV11024B (ko) |
| NO (1) | NO302942B1 (ko) |
| PL (1) | PL168378B1 (ko) |
| RO (1) | RO108674B1 (ko) |
| RU (1) | RU2079450C1 (ko) |
| SI (1) | SI9110668B (ko) |
| SK (1) | SK280745B6 (ko) |
| WO (1) | WO1991016269A1 (ko) |
| YU (1) | YU66891A (ko) |
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
Also Published As
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR920702670A (ko) | 황화합물을 함유하는 폐수의 처리 방법 | |
| ATE148082T1 (de) | Verfahren zur reinigung von sulfid enthaltendem abwasser | |
| ATE6490T1 (de) | Verfahren zum reinigen von abwasser und/oder abwasserschlamm. | |
| RU96100756A (ru) | Способ очистки сульфидсодержащих сточных вод | |
| RU99113449A (ru) | Способ биологического удаления сульфида | |
| DK0451922T3 (da) | Fremgangsmåde til fjernelse af svovldioxid fra afgas | |
| JP2799247B2 (ja) | 水から硫黄化合物を除去する方法 | |
| TH11957EX (th) | กรรมวิธีสำหรับดำเนินการกับน้ำที่มีสารประกอบกำมะถันอยู่ด้วย | |
| SU1664757A1 (ru) | Способ биологической денитрификации сточных вод | |
| Tsai et al. | Biotoxicity of Coal Liquefaction Waste in the Activated Sludge Process | |
| JPS57113898A (en) | Method and apparatus for biologically purifying waste water | |
| JPS55129191A (en) | Biologically treating method for waste water containing dithionic acid and polythionic acid | |
| ES2140783T3 (es) | Metodo para purificar corrientes de aguas residuales que contienen nitrogeno. | |
| KR970042300A (ko) | 폐수중에 함유된 고농도 시안화합물 제거 방법 | |
| NL9000878A (nl) | Werkwijze voor de zuivering van sulfidehoudend afvalwater. | |
| KR950013998A (ko) | 폐수의 생물학적 탈질, 탈인 처리방법 | |
| LT3624B (en) | Process for the treatment of water containing sulphur compounds |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20020221 Year of fee payment: 4 |
|
| LAPS | Lapse due to unpaid annual fee |