WO2001009047A1 - Municipal waste-water treatment method - Google Patents
Municipal waste-water treatment method Download PDFInfo
- Publication number
- WO2001009047A1 WO2001009047A1 PCT/SK2000/000011 SK0000011W WO0109047A1 WO 2001009047 A1 WO2001009047 A1 WO 2001009047A1 SK 0000011 W SK0000011 W SK 0000011W WO 0109047 A1 WO0109047 A1 WO 0109047A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- anaerobic
- municipal waste
- biomass
- treatment
- Prior art date
Links
- 239000010841 municipal wastewater Substances 0.000 title claims abstract description 29
- 238000004065 wastewater treatment Methods 0.000 title description 11
- 238000000034 method Methods 0.000 claims abstract description 48
- 239000002028 Biomass Substances 0.000 claims abstract description 24
- 239000000126 substance Substances 0.000 claims abstract description 11
- 230000014759 maintenance of location Effects 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 238000000354 decomposition reaction Methods 0.000 claims description 7
- 229920002994 synthetic fiber Polymers 0.000 claims description 3
- 239000000969 carrier Substances 0.000 claims 1
- 239000002351 wastewater Substances 0.000 abstract description 23
- 238000000746 purification Methods 0.000 description 8
- 239000010802 sludge Substances 0.000 description 8
- 230000004913 activation Effects 0.000 description 6
- 239000010865 sewage Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 230000029087 digestion Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- -1 Polypropylene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000009280 upflow anaerobic sludge blanket technology 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
- C02F3/30—Aerobic and anaerobic 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
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- 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
Definitions
- Present invention relates to a municipal waste-water treatment method.
- a combination of anaerobic-aerobic processes is used in the case of increased biological removing of phosphorus (luxury uptake process).
- the anaerobic part of the reactor serves just for the biochemical processes of releasing phosphates into the activation mixture, the organic contamination removing process as such does not take part in this part of the reactor.
- This method is characterized by maximum retention time of two to three hours for the waste-water in the anaerobic part, as described in the CS patent Nr. 275 878.
- PV 1313-96 describes a method of biological treatment of waste-water using a two-stage anaerobic-aerobic treatment process.
- supplied crude waste-water is treated by acidification, while simultaneously being mixed with recirculated, thickened anaerobic sludge.
- the method is suitable for waste-waters with medium to high degree of contamination, but not for municipal waste-waters.
- US patent Nr. 5 667 688 also utilizes a combination of anaerobic-aerobic processes with strict separation of anaerobic and aerobic zones. This strict separation is realized by a separated recirculation of the anaerobic and aerobic sludge, while a part of the purified waste-water is returned to the process with the aim of denitrification.
- the published application WO 97/00833 utilizes segmentation of the sewage treatment plant into an anaerobic and an aerobic part using a circular arrangement, wherein the length of the anaerobic zone is at least seven times greater than that of the aerobic zone.
- the biomass is not fixed by a carrier, but it is suspended in space.
- EP 0 302 545 A2 defines the process of psychrophylic purification of waste- water with medium to low concentration of contaminants.
- the anaerobic process is separated in two stages: the first anaerobic stage consists of a so-called UASB reactor with a sludge bed, the second stage consists of a reactor with a fluidized bed and a fine biomass carrier, and finally, the aerobic stage is defined for the nitrification process again as a reactor with a fluidized bed which consists of a fine carrier.
- the aerobic reactor is aerated.
- SK patent Nr. 279 389 defines a method of water purification in which the waste- water is dosed into a reactor containing carrier bodies consisting of plastic.
- the aim of the present invention is to provide such method of municipal waste-water treatment which would make the municipal waste-water treatment considerably more effective while reaching required parameters of water purity at the outlet of the aerobic stage.
- the above mentioned aim is reached by a method of treatment of municipal waste-waters from which coarse impurities have been removed using aerobic decomposition and a carrier.
- Nature of the invention consists in that, after removal of insoluble substances in the first settling stage, the municipal waste-water is treated stepwise in at least three next stages by anaerobic treatment process through the present attached biomass with a hydraulic retention time of 6 to 48 hours, and subsequently it is subjected to oxic removal process through the present attached biomass which is intensively aerated with pressure air, with a hydraulic retention time of 0.2 to 12 hours.
- the anaerobic and oxic treatment processes are performed in the presence of a biomass carrier having a specific surface of 60 to 500 m 2 /m 3 .
- the municipal waste-water proceeds through individual stages of the anaerobic proces either from below upwards or from above downwards.
- a carrier of the attached biomass having a greater specific surface may be used.
- the biomass carrier may consist of a natural material, for example fine gravel or sand, or of suitably treated synthetic materials, for example polyurethane foams or possibly insulating tubes.
- the municipal waste-water may be, together with the presented biomass, advantageously recycled into at least one of the anaerobic stages.
- Organic substances present in the waste-water are cleaved to simpler substances (lower fatty acids), the final product of the cleaving being methane which is released from water.
- the waste- water passes a layer of the built-up biomass, attached to the carrier surface, and the organic substances included in it are anaerobically decomposed. As a result, at the outlet of the reactor the waste-water reaches the required parameters.
- An advantage of this method consists in that the municipal waste-water treatmentl may be performed also without the presence of oxygen.
- a further advantage which cannot be disregarded consists in considerably lower energetical and investment demands for treatment of municipal waste-waters, while water having required purity parameters is obtained.
- the enclosed figure shows a basic scheme of individual stages of the method of municipal waste-water treatment.
- stage 1?? which consists of a sedimentation tank having a volume of 0.45 m 3 , where the major part of insoluble substances is removed from the waste-water.
- stage 2?? which consists of a sedimentation tank having a volume of 0.45 m 3 , where the major part of insoluble substances is removed from the waste-water.
- stage 2?? which consists of a sedimentation tank having a volume of 0.45 m 3 , where the major part of insoluble substances is removed from the waste-water.
- stage 2 and 3 are filled with isolating tubes, the stages 2 and 3 with isolating tubes having a specific surface of 90 m 2 /m 3 , the stages 4 and 5 with tubes having a specific surface of 110 m 2 /m 3 .
- the waste-water passes a layer of the built-up biomass, attached to the carrier surface, where decomposition of organic substances takes place.
- Polypropylene cords having an overall length of 230 m and a specific surface of about 250 - 300 m 2 /m 3 have been used as the biomass carrier.
- a hydraulic retention time of 3 hours with intensive aeration with pressure air a substantial purification of the waste-water takes place through the present biomass.
- the stage 7 serves for sedimentation of insoluble substances which have flow from the previous stages and to the outlet for the purified water into the recipient.
- the method according to this invention may be used for purification of sewage or municipal waste-water, especially in small contamination sources like family houses, cottages, recreational facilities, hotels, but also for larger sources like, for example, small villages, small towns.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
A method of treatment of municipal waste-waters from which coarse impurities have been removed using anaerobic treatment process and a carrier, consists in that after removal of insoluble substances in the first stage, the municipal waste-water is treated stepwise in at least three next stages (2, 3, 4) by anaerobic treatment comprising attached biomass with a hydraulic retention time of 6 to 48 hours, and subsequently it is subjected to oxic treatment process (6) with a hydraulic retention time of 0.2 to 12 hours, while the anaerobic and oxic removal take place in the presence of a biomass carrier having a specific surface of 60 to 500 m2/m3. The municipal waste-water proceeds through the individual stages of the anaerobic process either from below upwards or from above downwards. At the oxic treatment biomass is intensively aerated with pressure air, and after the oxic treatment the waste-water may be, together with the built-up biomass, recycled into at least one of the anaerobic stages.
Description
Municipal waste-water treatment method
Field of the invention
Present invention relates to a municipal waste-water treatment method.
Background of the invention
Present methods of municipal (sewage) waste-water treatment are exclusively based on aerobic processes. Under aerobic conditions, the activation mixture is aerated together with the waste-water with the aim to decompose organic substances present in the waste-water. The organic substances present in the domestic waste- water can usually be well decomposed. In the aerobic stages of wastewater treatment plants (WWTP), they are decomposed up to CO , while new biomass - activated sludge growths in the system. The activation mixture then settles in settling tanks. A part of the activation mixture is withdrawn in the form of excessive sludge and it is stabilized in digestion tanks. In the case of small WWTPs (up to 10 000 to 20 000 PE) the sludge stabilization is performed simultaneously or separately together with the activation mixture.
The energetically more favourable anaerobic processes (with no access of oxygen) are used in practice especially for more concentrated waste-waters (for example from food industry).
A combination of anaerobic-aerobic processes is used in the case of increased biological removing of phosphorus (luxury uptake process). The anaerobic part of the reactor serves just for the biochemical processes of releasing phosphates into the activation mixture, the organic contamination removing process as such does not take part in this part of the reactor. This method is characterized by maximum retention time of two to three hours for the waste-water in the anaerobic part, as described in the CS patent Nr. 275 878.
PV 1313-96 describes a method of biological treatment of waste-water using a two-stage anaerobic-aerobic treatment process. However, supplied crude waste-water is treated by acidification, while simultaneously being mixed with recirculated, thickened anaerobic sludge. The method is suitable for waste-waters with medium to high degree of contamination, but not for municipal waste-waters.
US patent Nr. 5 667 688 also utilizes a combination of anaerobic-aerobic processes with strict separation of anaerobic and aerobic zones. This strict separation is realized by a separated recirculation of the anaerobic and aerobic sludge, while a part of the purified waste-water is returned to the process with the aim of denitrification.
Also the published application WO 97/00833 utilizes segmentation of the sewage treatment plant into an anaerobic and an aerobic part using a circular arrangement, wherein the length of the anaerobic zone is at least seven times greater than that of the aerobic zone. The biomass is not fixed by a carrier, but it is suspended in space.
EP 0 302 545 A2 defines the process of psychrophylic purification of waste- water with medium to low concentration of contaminants. In this case the anaerobic process is separated in two stages: the first anaerobic stage consists of a so-called UASB reactor with a sludge bed, the second stage consists of a reactor with a fluidized bed and a fine biomass carrier, and finally, the aerobic stage is defined for the nitrification process again as a reactor with a fluidized bed which consists of a fine carrier. The aerobic reactor is aerated.
SK patent Nr. 279 389 defines a method of water purification in which the waste- water is dosed into a reactor containing carrier bodies consisting of plastic.
For sewage treatment plants, about 70 % of operational costs consist of the costs necessary to ensure the oxygen supply from air for effective creation of aerobic conditions. It is an energetically relatively demanding process, resulting in the purified waste-water and sewage sludge. For small sewage treatment plants, the so far used method of municipal (sewage) waste-water treatment as a whole may be characterized by relatively large volumes of activation tanks (150 - 250 1/inhabitant) and high specific costs per inhabitant.
The energetically more favourable anaerobic methods of municipal waste- water treatment meet with many technical and technological problems.
The aim of the present invention is to provide such method of municipal waste-water treatment which would make the municipal waste-water treatment considerably more effective while reaching required parameters of water purity at the outlet of the aerobic stage.
Description of the invention
The above mentioned aim is reached by a method of treatment of municipal waste-waters from which coarse impurities have been removed using aerobic decomposition and a carrier. Nature of the invention consists in that, after removal of insoluble substances in the first settling stage, the municipal waste-water is treated stepwise in at least three next stages by anaerobic treatment process through the present attached biomass with a hydraulic retention time of 6 to 48 hours, and subsequently it is subjected to oxic removal process through the present attached biomass which is intensively aerated with pressure air, with a hydraulic retention time of 0.2 to 12 hours. The anaerobic and oxic treatment processes are performed in the presence of a biomass carrier having a specific surface of 60 to 500 m2/m3.
It is preferred to perform the anaerobic decomposition of municipal waste- water for 10 to 24 hours.
The municipal waste-water proceeds through individual stages of the anaerobic proces either from below upwards or from above downwards.
In the anaerobic treatment process synthetic materials having a specific surface of 80 to 150 m2/m3 may be used.
In each subsequent decomposition stage of the anaerobic process, in the flow direction of the municipal waste-water, a carrier of the attached biomass having a greater specific surface may be used.
It has been found that it is advantageous to perform the oxic removal process of municipal waste-water for 1 to 3 hours.
The biomass carrier may consist of a natural material, for example fine gravel or sand, or of suitably treated synthetic materials, for example polyurethane foams or possibly insulating tubes.
It has also been found that after the oxic removal the municipal waste-water may be, together with the presented biomass, advantageously recycled into at least one of the anaerobic stages.
Organic substances present in the waste-water are cleaved to simpler substances (lower fatty acids), the final product of the cleaving being methane which is released from water.
The waste- water passes a layer of the built-up biomass, attached to the carrier surface, and the organic substances included in it are anaerobically decomposed. As a result, at the outlet of the reactor the waste-water reaches the required parameters.
In a case of increased requirements on the quality of waste-water treatment it is possible to complete the treatment of the waste-water, after it has passed an anaerobic stage, by an aerobic method using the air oxygen. The oxic removal process is performed using the present attached biomass which is intensively aerated by pressure air.
An advantage of this method consists in that the municipal waste-water treatmentl may be performed also without the presence of oxygen.-
Using this purification method problems with sludge are minimized, i. e. the necessity of building digestion tanks for storing the arised sludge is avoided.
A further advantage which cannot be disregarded consists in considerably lower energetical and investment demands for treatment of municipal waste-waters, while water having required purity parameters is obtained.
Short description of the figure in the drawing
The enclosed figure shows a basic scheme of individual stages of the method of municipal waste-water treatment.
Example of Embodiment
After the removal of coarse impurities the waste-water flows in the stage 1?? which consists of a sedimentation tank having a volume of 0.45 m3, where the major part of insoluble substances is removed from the waste-water. Through the upper overflow the waste-water falls into the stages 2, 3, 4 and 5. These stages are filled with isolating tubes, the stages 2 and 3 with isolating tubes having a specific surface of 90 m2/m3, the stages 4 and 5 with tubes having a specific surface of 110 m2/m3. The waste-water passes a layer of the built-up biomass, attached to the carrier surface, where decomposition of organic substances takes place.
The input parameters of the municipal waste-water were as follows: COD - 475 mg/1 BOD5 = 229 mg/1 Suspended solids (SS) - 448 mg/1
For the retention time of the waste-water in anaerobic sections of 24 hours the following parameters have been measured at the outlet of the stage 5:
COD = 160 mg/1, purification efficiency of 66 % BOD5 = 73 mg/1, purification efficiency of 68 % Suspended solids (SS) = 22 mg/1, purification efficiency of 95 %.
The waste-water, pre-treated in this way, flowed in the stage 6 which consisted of a tank having a volume of 0.2 m3. Polypropylene cords having an overall length of 230 m and a specific surface of about 250 - 300 m2/m3 have been used as the biomass carrier. During a hydraulic retention time of 3 hours with intensive aeration with pressure air a substantial purification of the waste-water takes place through the present biomass.
The stage 7 serves for sedimentation of insoluble substances which have flow from the previous stages and to the outlet for the purified water into the recipient.
At the outlet from the stage 7 the following parameters have been measured:
COD = 43 mg/1
BOD5 = 12 mg/l
Suspended solids (SS) = 8 mg/1.
Industrial Applicability
The method according to this invention may be used for purification of sewage or municipal waste-water, especially in small contamination sources like family houses, cottages, recreational facilities, hotels, but also for larger sources like, for example, small villages, small towns.
Claims
1. A method of treatment of municipal waste-waters from which coarse impurities have been removed using aerobic decomposition and a carrier, characterized in that after removal of insoluble substances in the first stage, the municipal waste-water is subjected to stepwise treatment in at least three next stages by anaerobic treatment proces through the present attached biomass with a hydraulic retention time of 6 to 48 hours, and subsequently it is subjected to oxic treatment process through the present biomass which is intensively aerated with pressure air, with a hydraulic retention time of 0.2 to 12 hours, while the anaerobic and oxic treatment processes are performed in the presence of a biomass carrier having a specific surface of 60 to 500 m /m .
2. A method according to claim 1, characterized in that the anaerobic treatment process of the municipal waste-water preferably takes place during 10 to 24 hours.
3. A method according to claims 1 and 2, characterized in that the municipal waste-water proceeds through the individual stages of the anaerobic process either from below upwards or from above downwards.
4. A method according to claims 1 to 3, characterized in that the carriers of the attached biomass are preferably synthetic materials having a specific surface of 80 to 150 m /m .
5. A method according to claims 1 to 4, characterized in that in each subsequent decomposition stage of the anaerobic decomposition, in the flow direction of the municipal waste-water, a carrier of the attached biomass having a greater specific surface is preferably used.
6. A method according to claims 1 to 5, characterized in that the oxic decay of the municipal waste-water is taking place preferably during 1 to 3 hours.
7. A method according to claims 1 to 5, characterized in that after the oxic decay the municipal waste-water is, together with the arose biomass, preferably recycled into at least one of the anaerobic stages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU63327/00A AU6332700A (en) | 1999-08-02 | 2000-07-31 | Municipal waste-water treatment method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SK1049-99A SK282499B6 (en) | 1999-08-02 | 1999-08-02 | Municipal waste-water treatment method |
| SKPV1049-99 | 1999-08-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001009047A1 true WO2001009047A1 (en) | 2001-02-08 |
Family
ID=20434219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SK2000/000011 WO2001009047A1 (en) | 1999-08-02 | 2000-07-31 | Municipal waste-water treatment method |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU6332700A (en) |
| CZ (1) | CZ293441B6 (en) |
| SK (1) | SK282499B6 (en) |
| WO (1) | WO2001009047A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857345A (en) * | 2010-06-22 | 2010-10-13 | 哈尔滨工业大学深圳研究生院 | Aeration biological filter pool device and process for efficiently denitrifying and dephosphorizing |
| CN101857337A (en) * | 2010-04-12 | 2010-10-13 | 中国市政工程华北设计研究总院 | Treatment method for biological nitrogen removal of reinforced sewage |
| CN105084672A (en) * | 2015-08-22 | 2015-11-25 | 哈尔滨金大环境工程有限公司 | Sectional-water-inlet A/O (anoxic/oxic) composite sewage treatment plant and sewage treatment method |
| CN105130138A (en) * | 2015-10-13 | 2015-12-09 | 蔡权 | Filler biofilm culturing sewage treatment technology and system for traditional Chinese medicine production sewage |
| CN105254011A (en) * | 2015-11-12 | 2016-01-20 | 山东大学 | Reactor capable of quickly starting anaerobic ammonia oxidation coupling nitrosation reaction and quick-start method |
| CN106277319A (en) * | 2016-08-30 | 2017-01-04 | 青岛思普润水处理股份有限公司 | A kind of Bardenpho denitrification dephosphorization technique based on MBBR |
| CN107055971A (en) * | 2017-06-02 | 2017-08-18 | 张宝爽 | A kind of recycling processing method of city domestic sewage |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0048675A1 (en) * | 1980-09-24 | 1982-03-31 | Société Entreprise Métallurgique d'Armor (S.E.M.A.) S.A. | Apparatus for the treatment of biochemical waste |
| EP0077002A1 (en) * | 1981-10-14 | 1983-04-20 | N.V. Studiebureau O. de Konincks | Process and installation for the anaerobic treatment of waste water and for the production of methane-containing biogas |
| JPS63104699A (en) * | 1986-10-20 | 1988-05-10 | Nippon Gesuidou Jigyodan | Method for controlling operation of anaerobic tank by underwater stirrer |
| US5525228A (en) * | 1993-09-22 | 1996-06-11 | Iowa State University Research Foundation, Inc. | Temperature-phased anaerobic waste treatment process |
| US5618430A (en) * | 1992-02-24 | 1997-04-08 | Linde Aktiengesellschaft | Process for performing reactions |
| US5630942A (en) * | 1996-05-29 | 1997-05-20 | Purification Industries International | Two phase anaerobic digestion process utilizing thermophilic, fixed growth bacteria |
-
1999
- 1999-08-02 SK SK1049-99A patent/SK282499B6/en unknown
-
2000
- 2000-07-31 AU AU63327/00A patent/AU6332700A/en not_active Abandoned
- 2000-07-31 WO PCT/SK2000/000011 patent/WO2001009047A1/en active Search and Examination
- 2000-08-02 CZ CZ20002825A patent/CZ293441B6/en not_active IP Right Cessation
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0048675A1 (en) * | 1980-09-24 | 1982-03-31 | Société Entreprise Métallurgique d'Armor (S.E.M.A.) S.A. | Apparatus for the treatment of biochemical waste |
| EP0077002A1 (en) * | 1981-10-14 | 1983-04-20 | N.V. Studiebureau O. de Konincks | Process and installation for the anaerobic treatment of waste water and for the production of methane-containing biogas |
| JPS63104699A (en) * | 1986-10-20 | 1988-05-10 | Nippon Gesuidou Jigyodan | Method for controlling operation of anaerobic tank by underwater stirrer |
| US5618430A (en) * | 1992-02-24 | 1997-04-08 | Linde Aktiengesellschaft | Process for performing reactions |
| US5525228A (en) * | 1993-09-22 | 1996-06-11 | Iowa State University Research Foundation, Inc. | Temperature-phased anaerobic waste treatment process |
| US5525228B1 (en) * | 1993-09-22 | 2000-05-30 | Univ Iowa State Res Found Inc | Temperature-phased anaerobic waste treatment process |
| US5630942A (en) * | 1996-05-29 | 1997-05-20 | Purification Industries International | Two phase anaerobic digestion process utilizing thermophilic, fixed growth bacteria |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 012, no. 349 (C - 529) 20 September 1988 (1988-09-20) * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857337A (en) * | 2010-04-12 | 2010-10-13 | 中国市政工程华北设计研究总院 | Treatment method for biological nitrogen removal of reinforced sewage |
| CN101857345A (en) * | 2010-06-22 | 2010-10-13 | 哈尔滨工业大学深圳研究生院 | Aeration biological filter pool device and process for efficiently denitrifying and dephosphorizing |
| CN105084672A (en) * | 2015-08-22 | 2015-11-25 | 哈尔滨金大环境工程有限公司 | Sectional-water-inlet A/O (anoxic/oxic) composite sewage treatment plant and sewage treatment method |
| CN105084672B (en) * | 2015-08-22 | 2017-09-22 | 哈尔滨金大环境工程有限公司 | Subsection water inflow A/O composite sewage treatment equipments and sewage water treatment method |
| CN105130138A (en) * | 2015-10-13 | 2015-12-09 | 蔡权 | Filler biofilm culturing sewage treatment technology and system for traditional Chinese medicine production sewage |
| CN105254011A (en) * | 2015-11-12 | 2016-01-20 | 山东大学 | Reactor capable of quickly starting anaerobic ammonia oxidation coupling nitrosation reaction and quick-start method |
| CN105254011B (en) * | 2015-11-12 | 2017-11-24 | 山东大学 | A kind of quick reactor and quick start method for starting Anammox coupling nitrosation reaction |
| CN106277319A (en) * | 2016-08-30 | 2017-01-04 | 青岛思普润水处理股份有限公司 | A kind of Bardenpho denitrification dephosphorization technique based on MBBR |
| CN106277319B (en) * | 2016-08-30 | 2019-06-28 | 青岛思普润水处理股份有限公司 | A kind of Bardenpho denitrification dephosphorization technique based on MBBR |
| CN107055971A (en) * | 2017-06-02 | 2017-08-18 | 张宝爽 | A kind of recycling processing method of city domestic sewage |
| CN107055971B (en) * | 2017-06-02 | 2018-01-19 | 张宝爽 | A kind of recycling processing method of city domestic sewage |
Also Published As
| Publication number | Publication date |
|---|---|
| SK282499B6 (en) | 2002-08-06 |
| AU6332700A (en) | 2001-02-19 |
| SK104999A3 (en) | 2001-04-09 |
| CZ293441B6 (en) | 2004-04-14 |
| CZ20002825A3 (en) | 2001-06-13 |
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