DE4119869C1 - Removal of ammonia and ammonium from drinking or waste water etc. - using zeolite rings of specified dimensions as filler etc. in reactor or column - Google Patents
Removal of ammonia and ammonium from drinking or waste water etc. - using zeolite rings of specified dimensions as filler etc. in reactor or columnInfo
- Publication number
- DE4119869C1 DE4119869C1 DE19914119869 DE4119869A DE4119869C1 DE 4119869 C1 DE4119869 C1 DE 4119869C1 DE 19914119869 DE19914119869 DE 19914119869 DE 4119869 A DE4119869 A DE 4119869A DE 4119869 C1 DE4119869 C1 DE 4119869C1
- Authority
- DE
- Germany
- Prior art keywords
- rings
- zeolite
- ammonia
- ammonium
- waste water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 22
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical group O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 title claims abstract description 7
- 239000002351 wastewater Substances 0.000 title claims abstract description 5
- 239000003651 drinking water Substances 0.000 title claims abstract description 4
- 230000035622 drinking Effects 0.000 title claims description 3
- 239000000945 filler Substances 0.000 title abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 7
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims abstract description 5
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims abstract description 3
- 150000001735 carboxylic acids Chemical class 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 6
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 4
- 235000011054 acetic acid Nutrition 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 235000019253 formic acid Nutrition 0.000 claims description 2
- 239000008235 industrial water Substances 0.000 claims description 2
- 235000014655 lactic acid Nutrition 0.000 claims description 2
- 241000237074 Centris Species 0.000 claims 1
- 150000007513 acids Chemical class 0.000 claims 1
- 239000004310 lactic acid Substances 0.000 claims 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 abstract description 2
- 235000020188 drinking water Nutrition 0.000 abstract 1
- 239000010457 zeolite Substances 0.000 description 5
- -1 Ammonium ions Chemical class 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000108664 Nitrobacteria Species 0.000 description 1
- 241000605122 Nitrosomonas Species 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 241000589516 Pseudomonas Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 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
- C02F3/04—Aerobic processes using trickle filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/30—Loose or shaped packing elements, e.g. Raschig rings or Berl saddles, for pouring into the apparatus for mass or heat transfer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J39/00—Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
- B01J39/08—Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
- B01J39/14—Base exchange silicates, e.g. zeolites
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/586—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing ammoniacal nitrogen
-
- 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
- C02F3/10—Packings; Fillings; Grids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/30—Details relating to random packing elements
- B01J2219/302—Basic shape of the elements
- B01J2219/30223—Cylinder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/30—Details relating to random packing elements
- B01J2219/304—Composition or microstructure of the elements
- B01J2219/30416—Ceramic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Water Treatment By Sorption (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
Description
Die Erfindung betrifft die Verwendung von Zeolith-Ringen mit einer zentrischen Bohrung, einer Höhe und Breite zwischen 200 mm und 20 mm bei einer Wandstärke von min destens 5 mm als Tropfkörper oder Füllmaterial in Reak toren oder Kolonnen.The invention relates to the use of zeolite rings with a central bore, height and width between 200 mm and 20 mm with a wall thickness of min at least 5 mm as trickling filter or filling material in reak gates or columns.
Ammonium-Ionen (NH4+) oder Ammoniak (NH3-) werden von Roh- und/oder Abwässern gegenwärtig durch Ionenaustausch oder durch Stripping oder mit Hilfe von biologischen Verfahren entfernt. Je nachdem, wie hoch die Ammonium/ Ammoniak-Konzentration ist, kann man von diesen drei Möglichkeiten Gebrauch machen. Die Ammonium-Ionen werden mit den Kationenaustauschern ökonomisch nur in dem Falle entfernt, wenn die Konzentration im Wasser relativ klein ist. Größere Mengen von Ammonium werden durch mikrobiel le Vorgänge, d. h. durch aerobe und anaerobe Schritte - erst zu NO3 oxidiert und dann zu N2 reduziert - elimi niert. Es sind nach diesen Prinzipien ausgereifte Tech nologien, die überall in der Welt in den verschiedensten Wasservorbehandlungen und Kläranlagen immer mehr verwen det werden. Jedes der genannten Verfahren hat, vergli chen mit den anderen, bestimmte Vor- und Nachteile. Wenn mit Kationenaustauschern gearbeitet wird, muß man sich zwangsläufig mit der Regenerierung des Ionenaustauschers beschäftigen, abgesehen davon, daß die Ionenaustauscher sehr teuer sind. Wenn NH4+ auf biologischem Wege ent fernt wird, sind mehrere Schritte erforderlich, um zum Endziel zu gelangen.Ammonium ions (NH4 +) or ammonia (NH3-) are from Raw and / or waste water currently through ion exchange or by stripping or with the help of biological Procedure removed. Depending on how high the ammonium / Ammonia concentration is one of these three Make use of opportunities. The ammonium ions are economically with the cation exchangers only in this case removed when the concentration in the water is relatively small is. Larger amounts of ammonium are microbial operations, d. H. through aerobic and anaerobic steps - first oxidized to NO3 and then reduced to N2 - elimi kidney. They are mature tech based on these principles technologies that are all over the world in the most diverse Use water pretreatment and sewage treatment plants more and more be det. Each of the methods mentioned has, see with the others, certain advantages and disadvantages. If you have to work with cation exchangers inevitably with the regeneration of the ion exchanger deal, besides that the ion exchanger are very expensive. If NH4 + occurs biologically is removed, several steps are required to get to the Final destination.
Der vorliegenden Erfindung liegt daher die Aufgabe zu grunde, NH4+-Ionen quasi direkt, in einem Schritt aus dem Wasser oder aus wäßrigen Lösungen zu entfernen.The present invention is therefore based on the object reasons, NH4 + ions quasi directly, in one step to remove the water or from aqueous solutions.
Zur Lösung der gestellten Aufgabe wird die Verwendung von Zeolith-Ringen mit einer zentrischen Bohrung, einer Höhe und Breite zwischen 200 mm und 20 mm bei einer Wandstärke von mindestens 5 mm als Tropfkörper oder Füllmaterial in Reaktoren oder Kolonnen zum biologischen Entfernen von Ammonium/Ammoniak aus Wasser, insbesondere Trink-, Brauch- oder Abwasser, vorgeschlagen.Use is used to solve the task of zeolite rings with a central bore, one Height and width between 200 mm and 20 mm at one Wall thickness of at least 5 mm as trickling filter or Filling material in reactors or columns for biological Removing ammonium / ammonia from water, in particular Drinking, industrial or waste water, proposed.
Es wurden zwar bisher schon Tropfkörper aus Basalttuff (Lavagestein), PVC, Polystyrol, Papier mit Kunstharz im prägniert, usw. verwendet, hierbei konnte jedoch der Ef fekt der direkten Entfernung von Ammonium/Ammoniak aus dem Wasser nicht beobachtet werden.So far there have been trickling filters made of basalt tuff (Lava stone), PVC, polystyrene, paper with synthetic resin in the impregnated, etc. used, however, the Ef effect of the direct removal of ammonium / ammonia not be observed in the water.
Die Zeolith-Ringe werden vor ihrer Verwendung mit C1 bis C6-Carbonsäuren und/oder Hydroxycarbonsäuren wie z. B. Ameisensäure, Essigsäure, Milch säure, Capronsäure usw., behandelt.The zeolite rings are pre-used with C1 to C6 carboxylic acids and / or hydroxy carboxylic acids such as B. formic acid, acetic acid, milk acid, caproic acid, etc. treated.
Anhand der Zeichnung soll am Beispiel eines ZeoIith- Ringes die erfindungsgemäße Verwendung derartiger Ringe dargestellt werden. Using the drawing, using the example of a ZeoIith Ring the use of such rings according to the invention being represented.
Die Zeichnung zeigt eine perspektivische Darstellung eines aus Zeolith hergestellten Ringes.The drawing shows a perspective view of a ring made of zeolite.
Wie sich aus der Zeichnung ergibt, besteht der Zeolith- Ring aus einem zylindrischen Formkörper 1 aus künstli chem und/oder natürlichem Zeolithmaterial, welcher eine zentrische Bohrung 2 aufweist. Die Wanddicke d des Form körpers beträgt mindestens 5 mm.As can be seen from the drawing, the zeolite ring consists of a cylindrical molded body 1 made of artificial and / or natural zeolite material which has a central bore 2 . The wall thickness d of the molded body is at least 5 mm.
Die Höhe h des Formkörpers kann zwischen 200 mm und 20 mm betragen. Die Breite b kann ebenfalls zwischen 200 mm und 20 mm betragen.The height h of the molded body can be between 200 mm and 20 mm. The width b can also be between 200 mm and 20 mm.
Die so hergestellten Zeolith-Ringe werden als Füll material in beliebiger Anordnung geschichtet in einen Reaktor oder in eine Kolonne gegeben. Diese Anordnung wird von dem zu behandelnden Wasser durchflossen. Nach dem Kontaktieren des Ammoniak enthaltenden Wassers mit den Zeolith-Ringen gemäß der Erfindung entstehen nach kürzester Zeit Mischbiozönosen durch Ablagerung der Mikroorganismen. Dabei entstehen am Ring zwei Schichten, nämlich an der Außenseite eine aerobe Schicht mit aus reichender Sauerstoffzufuhr mit Nitrobakterien und Nitrosomonas. Im Ringmaterial selbst entsteht eine an aerobe Schicht mit unzureichender oder keiner Sauer stoffzufuhr mit Pseudomonas und Benitrobacillus. Die NH4-Ionen werden in dem Zeolith mit Hilfe von Kationen austausch festgehalten, die dann durch aerobe und/oder anaerobe Abbauvorgänge umgesetzt und als Stickstoff ent fernt werden.The zeolite rings produced in this way are used as fillers material in any arrangement layered in one Reactor or placed in a column. This arrangement is flowed through by the water to be treated. To contacting the water containing ammonia the zeolite rings according to the invention arise after mixed biocenoses by deposition of the Microorganisms. This creates two layers on the ring, namely on the outside with an aerobic layer sufficient oxygen supply with nitrobacteria and Nitrosomonas. One forms in the ring material itself aerobic layer with insufficient or no acid feed with Pseudomonas and Benitrobacillus. The NH4 ions are in the zeolite with the help of cations exchange held by aerobic and / or Anaerobic degradation processes implemented and ent as nitrogen be removed.
Die Zeolith-Ringe können aus verschiedenen Zeolithen, insbesondere aus natürlichen Zeolithen, durch Kleben und Pressen hergestellt werden. Die Korngröße des Ausgangs materials liegt unter 5 mm, und die Wanddicke d jedes Ringes muß mindestens 5 mm betragen. Die Höhe h liegt zwischen 200 mm und 20 mm, ebenso liegt die Breite b zwischen 200 mm und 20 mm.The zeolite rings can be made from different zeolites, especially from natural zeolites, by gluing and Presses are made. The grain size of the output materials is less than 5 mm, and the wall thickness d each Ring must be at least 5 mm. The height h is between 200 mm and 20 mm, likewise the width b between 200 mm and 20 mm.
Die Zeolith-Ringe weisen eine viel größere Oberfläche als die bisher verwendeten, oben erwähnten Tropfkörper auf. Ein wesentlicher Unterschied zu den bekannten Tropfkörpern besteht noch darin, daß die Zeolith-Ringe kontinuierlich pH-stabilisierend wirken und somit die Voraussetzungen für den biologischen Abbau von NH4+ schaffen.The zeolite rings have a much larger surface than the previously used trickling filters used above on. A major difference to the known Trickling filters is still that the zeolite rings continuously stabilize the pH and thus the Prerequisites for the biodegradation of NH4 + create.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914119869 DE4119869C1 (en) | 1991-06-17 | 1991-06-17 | Removal of ammonia and ammonium from drinking or waste water etc. - using zeolite rings of specified dimensions as filler etc. in reactor or column |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914119869 DE4119869C1 (en) | 1991-06-17 | 1991-06-17 | Removal of ammonia and ammonium from drinking or waste water etc. - using zeolite rings of specified dimensions as filler etc. in reactor or column |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4119869C1 true DE4119869C1 (en) | 1993-02-04 |
Family
ID=6434084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19914119869 Expired - Fee Related DE4119869C1 (en) | 1991-06-17 | 1991-06-17 | Removal of ammonia and ammonium from drinking or waste water etc. - using zeolite rings of specified dimensions as filler etc. in reactor or column |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4119869C1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19950617A1 (en) * | 1999-10-20 | 2001-04-26 | Thilo Herrmann | Waste water treatment and plant involves alternately charging sorbent substrate, degradation and/or metabolization of sorbed dissolved matter during aeration phase and washing with part of outflow |
FR2821346A1 (en) * | 2001-02-28 | 2002-08-30 | Eparco Assainissement | Waste water denitrification procedure uses hydrolysis, pozzolana/ bacterial reactor and aerobic zeolite filter |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3738916A1 (en) * | 1987-11-17 | 1989-05-24 | Ibs Engineering & Consulting I | Large-sized or small-sized molecular sieve shaped body and process for the production thereof |
-
1991
- 1991-06-17 DE DE19914119869 patent/DE4119869C1/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3738916A1 (en) * | 1987-11-17 | 1989-05-24 | Ibs Engineering & Consulting I | Large-sized or small-sized molecular sieve shaped body and process for the production thereof |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19950617A1 (en) * | 1999-10-20 | 2001-04-26 | Thilo Herrmann | Waste water treatment and plant involves alternately charging sorbent substrate, degradation and/or metabolization of sorbed dissolved matter during aeration phase and washing with part of outflow |
FR2821346A1 (en) * | 2001-02-28 | 2002-08-30 | Eparco Assainissement | Waste water denitrification procedure uses hydrolysis, pozzolana/ bacterial reactor and aerobic zeolite filter |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0503649B1 (en) | Process and apparatus for biological purification of waste waters polluted with non biodegradable or hardly biodegradable substances | |
CH621752A5 (en) | ||
DE1517526A1 (en) | Process for the treatment of waste water | |
EP0286870A1 (en) | System for conditioning water by ozone | |
DE3601669A1 (en) | METHOD FOR BIOLOGICAL WASTE WATER TREATMENT | |
DE69407924T2 (en) | Process for the purification and biodesodorization of an exhaust gas and device for carrying out this process | |
DE2454426A1 (en) | PROCESS FOR TREATMENT OF RAW WASTEWATER AND INSTALLATION FOR CARRYING OUT THE PROCESS | |
DE3006070A1 (en) | METHOD AND DEVICE FOR TREATING WASTEWATER | |
DE602004002271T2 (en) | BIOLOGICAL REMOVAL OF OXYANIONES-LIKE PERCHLORATE ON ION EXCHANGE RESINS | |
DE3908779C1 (en) | Lagoon installation | |
CH656113A5 (en) | METHOD FOR CLEANING WASTEWATER IN A FLOATING LAYER REACTOR. | |
EP0182380B1 (en) | Process and apparatus for the biological treatment of water, especially for the denitrification of drinking water | |
DE2550818A1 (en) | Biological waste water purificn. by activated sludge process - using plant provided with flexible collectors for biomass and colloids | |
DE4119869C1 (en) | Removal of ammonia and ammonium from drinking or waste water etc. - using zeolite rings of specified dimensions as filler etc. in reactor or column | |
DE7013664U (en) | CLEANING DEVICE. | |
DE4343767C1 (en) | Process for decreasing the pollutant content and for reducing the ammonium content and the COD and BOD5 values in composting waste water | |
DE3410412A1 (en) | Process for biological denitrification and reactor for denitrification | |
DE2420744C3 (en) | Device for purifying waste water | |
EP1426337A1 (en) | Process and plant for biological treatment of waste water | |
DE69100225T2 (en) | Device for the purification of waste water. | |
DE60109452T2 (en) | BIOLOGICAL FIXED BREAKER REACTOR AND METHOD OF WASTEWATER TREATMENT | |
DE19620158C2 (en) | Method and device for the biological treatment of waste water with a separate sludge treatment stage | |
DE19853906C2 (en) | Process and arrangement for cleaning leachate | |
DE69200086T2 (en) | Process for removing organic carbon, nitrogen and phosphorus. | |
DE4204590C2 (en) | Process for biological wastewater treatment in an aeration tank |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |