WO1996038383A1 - Process for purifying aqueous liquids contaminated with inorganic and/or organic pollutants - Google Patents
Process for purifying aqueous liquids contaminated with inorganic and/or organic pollutants Download PDFInfo
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- WO1996038383A1 WO1996038383A1 PCT/DE1996/000970 DE9600970W WO9638383A1 WO 1996038383 A1 WO1996038383 A1 WO 1996038383A1 DE 9600970 W DE9600970 W DE 9600970W WO 9638383 A1 WO9638383 A1 WO 9638383A1
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- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
Definitions
- the invention relates to a method for cleaning aqueous liquids contaminated with inorganic and / or organic pollutants according to the preamble of claim 1.
- Contamination of soils and water with organic pollutants, for example oil, tar or phenols, and / or with inorganic pollutants represents a major environmental problem.
- the invention has for its object to provide a method with which aqueous liquids contaminated with inorganic and / or organic pollutants can be cleaned in a simple, effective and cost-effective manner and a depositable or usable pollutant-bound sediment or filtrate as Immobilisat with seal building material character is provided.
- the contaminated aqueous liquid is stirred with an active fly ash having a hollow spherical structure with a fly ash amount of 5-120%, based on the contaminated aqueous liquid, for a predetermined time, the fly ash having the following properties:
- the fly ash contains 80-100%, in particular 90%, grain fraction with a diameter of less than 0.09 mm,
- the specific surface is greater than 2500 g / cm.
- the fly ash used according to the invention which has a swellable behavior, has an extremely high adsorption capacity of fine particles in aqueous solution and a very good absorptive binding capacity for such fine particles and solution products.
- a quantity of fly ash of 30-120% is preferably used in the case of more severe contaminations.
- the fly ash is mixed with the contaminated aqueous liquid, the pollutants being brought into intensive contact with the fly ash.
- the pollutants are bound to the fly ash and immobilized in the alkaline environment.
- a sedimentation process or a filtration process can be carried out in which the excess water is separated from the fly ash / pollutant mixture.
- the process according to the invention can be used to remove contaminated aqueous liquids from inorganic and / or organic pollutants in a very simple, inexpensive and effective manner by utilizing the high adsorption and absorption capacity of the fly ash composition according to the invention with regard to organic and inorganic pollutants.
- fly ash is a very inexpensive cleaning agent, which is a waste product in particular in lignite firing and would have to be disposed of as waste.
- the fly ash "enriched" with the pollutants and immobilizing these pollutants can moreover be solidified without problems after removal of the purified excess water and can be shaped and used, for example, for structural purposes.
- the high adsorption and absorption capacity of the fly ash for the pollutants ensures that the pollutants are not in again the environment are released, but remain bound to the fly ash.
- a particularly good cleaning effect can be achieved if the stirring is carried out at a suspension density of less than 1.5 g / cm 3 .
- a sedimentation process can be carried out to sediment the pollutant fly ash connection.
- the fly ash provided with the pollutants settles on the floor, while the cleaned liquid, which is present as an alkaline immobilizing and pollutant-fixing liquid in the basic range above pH 7, is easily and "environmentally neutral” removed or can be used in a useful manner.
- the sediment i.e. the pollutant-fly ash connection can be used and, if necessary, processed as an environmentally compatible construction material that hardens without shrinkage and guarantees long-term safe immobilization, integration and fixation.
- the sediment it is possible to reactivate the sediment by adding cement, with which the strength and tightness of the sediment can be controlled.
- the ratio of fly ash to cement is advantageously substantially greater than 1, ie. This means that, in comparison to the amount of fly ash, only very small amounts of cement have to be added.
- this can be achieved by stirring the contaminated liquid suspension resulting from the fly ash can also be filtered by applying the suspension to a filter.
- This filter can consist, for example, of the soil, ie the suspension is applied directly to the soil after stirring without waiting for the solid components to settle.
- the fly ash remains together with the immobilized pollutants on the soil surface, while the cleaned excess water seeps through the soil or, depending on the nature of the soil, runs off on the soil surface. Since, as already stated, the pollutants remain firmly bound to the fly ash, this is possible without any risk to the environment.
- cement can be added to the homogeneous, thin suspension, in particular at the end of the stirring process, in order to control the strength and tightness properties of the hardening constituents after the excess water has drained away.
- the ratio of fly ash to cement is advantageously much larger than 1.
- the hardening solid stabilizer can be used, for example, as a sealing material for shrink-free and joint-free applications, e.g. B. in landfill construction or as a filter press cake property such as building rubble without landfill safety problems or deposited.
- the process according to the invention can preferably be used in sewage and seepage waters which have a high pollutant elution rate with regard to inorganic and organic pollutants in the form of very fine particles and solution products with an insufficient alkaline bond, as is the case, for example, with landfill leachate.
- the process described can preferably be carried out in situ in the case of liquid waste loads in such a way that the aqueous liquid load is mixed with fly ash in such a way that a homogeneous, thin, but constantly thicker suspension with a final density of less than 1.5 kg / l is formed,
- a stirring process or pump circulation process takes place (for larger liquid waste loads, for technical reasons also longer than 4 hours) and cement can be added as an activator in this process before sedimentation.
- the largely purified water from the former liquid waste can be drawn off and, if necessary, cleaned, whereby the sediment is then either taken up as a building material (possibly re-mixing and activation with cement) or remains on the sole as a sealing material ( can be used simultaneously in combination with a sole renovation).
- the process can be carried out using large agitators, e.g. Calculator agitators are used, whereby the cleaned water and sediment can be sucked off separately for the derivation and processing of the use, or as a thin liquid phase in a mixture for filtration via special equipment (eg filter press for sewage sludge) , resulting in purified water and a processable filter cake which binds the pollutants as a building material, which may still have to be reactivated with cement) or is released via the soil.
- special equipment eg filter press for sewage sludge
- the coupling of the preparation and transport of the stabilizer to be used should preferably be carried out using concrete mixers with drum contents of, for example, 6, 7, 9 or 12 m 3 , in which fly ash and the aqueous liquid to be cleaned are metered in and after the stirring process with or without cement activation as a low-viscosity mixing product.
- product for filtration through apparatus or soil or as separate phases liquid after suction, sediment can be removed or used further.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Verfahren zur Reinigung von mit anorganischen und/oder or¬ ganischen Schadstoffen kontaminierten wässriαen Flüssigkei¬ ten. Process for cleaning aqueous liquids contaminated with inorganic and / or organic pollutants.
Die Erfindung betrifft ein Verfahren zur Reinigung von mit anorganischen und/oder organischen Schadstoffen kontami¬ nierten wässrigen Flüssigkeiten gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a method for cleaning aqueous liquids contaminated with inorganic and / or organic pollutants according to the preamble of claim 1.
Die Kontamination von Böden und Gewässern mit organischen Schadstoffen, beispielsweise Öl, Teer oder Phenole, und/oder mit anorganischen Schadstoffen stellt ein großes umwelttechnisches Problem dar. Besondere Probleme bereiten hierbei durch Havarien in Gewässer eingeleitete Schadstoffe und durch Lagerung in Deponien eingebrachte Schadstoffe mit flüssigen und/oder schlammigen Ablagerungen, sowie die un¬ zureichende Ablagerungssicherheit der schlammigen Ablage¬ rungen mit zu geringen Trockensubstanzgehalten, wie dies z.B. bei Klärschlämmen der Fall ist.Contamination of soils and water with organic pollutants, for example oil, tar or phenols, and / or with inorganic pollutants represents a major environmental problem. Particular problems are caused here by pollutants introduced into water bodies and by pollutants introduced into landfills with liquid and / or muddy deposits, as well as the inadequate deposit security of the muddy deposits with insufficient dry matter contents, such as, for example is the case with sewage sludge.
Um eine Verbreitung oder Einsickern der Schadstoffe in das Grundwasser zu vermeiden, sind entweder aufwendige Ma߬ nahmen zur Reinigung der kontaminierten wässrigen Flüssig¬ keiten oder umfangreiche bautechnische Maßnahmen erforder¬ lich, um die kontaminierten Flüssigkeiten abzuschotten bzw. es sind erhebliche Mehraufwendungen für die Ablagerung schwer entwässerbarer Schlämme, wie z.B. Klärschlämme, zur Erreichung einer Deponierung in kompaktierter Form mit er¬ höhtem Trockensubstanzgehalt erforderlich.In order to avoid the spreading or infiltration of the pollutants into the groundwater, either complex measures for cleaning the contaminated aqueous liquids or extensive constructional measures are necessary to isolate the contaminated liquids or there are considerable additional expenses for the deposition Sludge that is difficult to drain, such as sewage sludge, is required to achieve landfill in compact form with an increased dry matter content.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zu schaffen, mit dem auf möglichst einfache, wirksame und ko¬ stengünstige Weise mit anorganischen und/oder organischen Schadstoffen kontaminierte wässrige Flüssigkeiten gereinigt werden können und ein ablagerungs- bzw. anwendungsfähiges schadstoffeingebundenes Sediment bzw. Filtrat als Immobili- sat mit DichtbaustoffCharakter zur Verfügung gestellt wird.The invention has for its object to provide a method with which aqueous liquids contaminated with inorganic and / or organic pollutants can be cleaned in a simple, effective and cost-effective manner and a depositable or usable pollutant-bound sediment or filtrate as Immobilisat with seal building material character is provided.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausführungsformen der Er- findung sind in den weiteren Ansprüchen beschrieben.This object is achieved by the features of claim 1. Advantageous embodiments of the invention are described in the further claims.
Beim erfindungsgemäßen Verfahren wird die kontaminierte wässrige Flüssigkeit mit einer eine Hohlkugelstruktur auf¬ weisenden aktiven Flugasche mit einer Flugaschenmenge von 5 - 120 %, bezogen auf die kontaminierte wässrige Flüssig¬ keit, eine vorbestimmte Zeit lang verrührt, wobei die Flugasche die folgenden Eigenschaften aufweist:In the method according to the invention, the contaminated aqueous liquid is stirred with an active fly ash having a hollow spherical structure with a fly ash amount of 5-120%, based on the contaminated aqueous liquid, for a predetermined time, the fly ash having the following properties:
a) die Flugasche enthält 80 - 100 %, insbesondere 90 % Kornanteil mit einem Durchmesser von unter 0,09 mm,a) the fly ash contains 80-100%, in particular 90%, grain fraction with a diameter of less than 0.09 mm,
b) der pH-Wert ist in wässriger Lösung größer als 12,b) the pH value in aqueous solution is greater than 12,
c) der CaO-Gehalt ist größer als 10 Masse-%,c) the CaO content is greater than 10% by mass,
d) die spezifische Oberfläche ist größer als 2500 g/cm .d) the specific surface is greater than 2500 g / cm.
Die erfindungsgemäß verwendete Flugasche, die ein quellfä¬ higes Verhalten aufweist, hat ein außerordentlich hohes Ad- sorptionsvermögen von Feinstpartikeln in wässriger Lösung sowie ein sehr gutes absorptives Einbindungsvermögen für derartige Feinstpartikel und Lösungsprodukte. Bei geringen Ausgangskontaminationen reicht erfindungsgemäß bereits eine Flugaschenmenge von 5 - 30 %, bezogen auf die kontaminierte wässrige Flüssigkeit, zur Erzielung eines ablagerungs- bzw. einbaufähigen Sedimentes bzw. Filtrates, während bei stär- keren Kontaminationen bevorzugt eine Flugaschenmenge von 30 - 120 % verwendet wird.The fly ash used according to the invention, which has a swellable behavior, has an extremely high adsorption capacity of fine particles in aqueous solution and a very good absorptive binding capacity for such fine particles and solution products. At low Starting contaminations according to the invention already suffice for an amount of fly ash of 5 to 30%, based on the contaminated aqueous liquid, to achieve a sediment or filtrate capable of being deposited or incorporated, whereas a quantity of fly ash of 30-120% is preferably used in the case of more severe contaminations.
Durch den Rührvorgang wird die Flugasche mit der kontami¬ nierten wässrigen Flüssigkeit vermischt, wobei die Schadstoffe auf intensive Weise mit der Flugasche in Kon¬ takt gebracht werden. Die Schadstoffe werden hierbei im al¬ kalischen Milieu an die Flugasche gebunden und immobili¬ siert.As a result of the stirring process, the fly ash is mixed with the contaminated aqueous liquid, the pollutants being brought into intensive contact with the fly ash. The pollutants are bound to the fly ash and immobilized in the alkaline environment.
Nach dem Rührvorgang, der vorzugsweise 0,5 - 4 Stunden lang durchgeführt wird, kann ein Sedimentationsvorgang oder ein Filtrationsvorgang vorgenommen werden, in denen das Über¬ schußwasser vom Flugasche-Schadstoff-Gemisch getrennt wird.After the stirring process, which is preferably carried out for 0.5-4 hours, a sedimentation process or a filtration process can be carried out in which the excess water is separated from the fly ash / pollutant mixture.
Durch das erfindungsgemäße Verfahren können kontaminierte wässrige Flüssigkeiten auf sehr einfache, kostengünstige und effektive Weise von anorganischen und/oder organischen Schadstoffen gereinigt werden, indem die hohe Adsorptions¬ und Absorptionsfähigkeit der erfindungsgemäßen Flugaschen- Zusammensetzung hinsichtlich organischer und anorganischer Schadstoffe ausgenutzt wird. Weiterhin ist Flugasche ein sehr kostengünstiges Reinigungsmittel, das insbesondere bei der Braunkohlenfeuerung als Abfallprodukt anfällt und als Abfall beseitigt werden müßte.The process according to the invention can be used to remove contaminated aqueous liquids from inorganic and / or organic pollutants in a very simple, inexpensive and effective manner by utilizing the high adsorption and absorption capacity of the fly ash composition according to the invention with regard to organic and inorganic pollutants. Furthermore, fly ash is a very inexpensive cleaning agent, which is a waste product in particular in lignite firing and would have to be disposed of as waste.
Die mit den Schadstoffen "angereicherte" und diese Schadstoffe immobilisierende Flugasche kann darüber hinaus nach dem Entfernen des gereinigten Überschußwassers pro¬ blemlos verfestigt und beispielsweise für bauliche Zwecke geformt und eingesetzt werden. Das hohe Adsorptions- und Absorptionsvermögen der Flugasche für die Schadstoffe stellt dabei sicher, daß die Schadstoffe nicht wieder in die Umgebung abgegeben werden, sondern an der Flugasche ge¬ bunden bleiben.The fly ash "enriched" with the pollutants and immobilizing these pollutants can moreover be solidified without problems after removal of the purified excess water and can be shaped and used, for example, for structural purposes. The high adsorption and absorption capacity of the fly ash for the pollutants ensures that the pollutants are not in again the environment are released, but remain bound to the fly ash.
Eine besonders gute Reinigungswirkung kann erzielt werden, wenn das Verrühren bei einer Suspensionsdichte von kleiner als 1,5 g/cm3 durchgeführt wird.A particularly good cleaning effect can be achieved if the stirring is carried out at a suspension density of less than 1.5 g / cm 3 .
Nach dem Verrühren kann ein Sedimentationsvorgang zum Sedi- entieren der Schadstoff-Flugaschenverbindung durchgeführt werden. Die mit den Schadstoffen versehene Flugasche setzt sich hierbei am Boden ab, während die gereinigte Flüssig¬ keit, die als alkalisch-immobilisierende und schadstoff-fi- xierende Flüssigkeit im basischen Bereich oberhalb des pH- Wertes 7 vorliegt, problemlos und "umweltneutral" beseitigt oder in nutzbringender Weise weiterverwendet werden kann.After stirring, a sedimentation process can be carried out to sediment the pollutant fly ash connection. The fly ash provided with the pollutants settles on the floor, while the cleaned liquid, which is present as an alkaline immobilizing and pollutant-fixing liquid in the basic range above pH 7, is easily and "environmentally neutral" removed or can be used in a useful manner.
Falls dies im Einzelfall erforderlich sein sollte, ist es ohne weiteres und ohne großen Aufwand möglich, die nach dem Sedimentationvorgang verbleibende Flüssigkeit einem Nach- reinigungsprozeß zu unterwerfen.If this should be necessary in individual cases, it is possible without further ado and without great effort to subject the liquid remaining after the sedimentation process to a post-cleaning process.
Das Sediment, d.h. die Schadstoff-Flugaschen-Verbindung, kann als schwindfrei erhärtender, umweltverträglicher Bau¬ stoff, der eine langzeitsichere SchadstoffImmobilisierung, -einbindung und -fixierung gewährleistet, zur Anwendung ge¬ langen und ggf. weiterverarbeitet werden.The sediment, i.e. the pollutant-fly ash connection can be used and, if necessary, processed as an environmentally compatible construction material that hardens without shrinkage and guarantees long-term safe immobilization, integration and fixation.
Hierbei ist es gemäß einer vorteilhaften Ausführungsform möglich, das Sediment durch Zugabe von Zement zu reaktivie- ren, womit die Festigkeit und Dichtigkeit des Sediments ge¬ steuert werden können. Das Verhältnis von Flugasche zu Ze¬ ment ist hierbei vorteilhafterweise wesentlich größer als 1, d. h., daß im Vergleich zur Flugaschenmenge nur sehr ge¬ ringe Zementmengen zugegeben werden müssen.Here, according to an advantageous embodiment, it is possible to reactivate the sediment by adding cement, with which the strength and tightness of the sediment can be controlled. The ratio of fly ash to cement is advantageously substantially greater than 1, ie. This means that, in comparison to the amount of fly ash, only very small amounts of cement have to be added.
Alternativ zum Durchführen eines Sedimentationsvorgangs kann die sich durch das Verrühren der kontaminierten Flüs- sigkeit mit der Flugasche ergebende dünnflüssige Suspension auch gefiltert werden, indem die Suspension auf einen Fil¬ ter aufgebracht wird. Dieser Filter kann beispielsweise aus dem Erdboden bestehen, d. h. die Suspension wird nach dem Verrühren, ohne daß ein Absetzprozeß der Festbestandteile abgewartet wird, direkt auf den Boden aufgebracht. Die Flugasche bleibt hierbei zusammen mit den immobilisierten Schadstoffen an der Bodenoberfläche, während das gereinigte Überschußwasser durch den Boden hindurch absickert oder aber, je nach Bodenbeschaffenheit, an der Bodenoberfläche abläuft. Da, wie bereits ausgeführt, die Schadstoffe fest an der Flugasche gebunden bleiben, ist dies ohne Gefahr für die Umwelt möglich.As an alternative to carrying out a sedimentation process, this can be achieved by stirring the contaminated liquid suspension resulting from the fly ash can also be filtered by applying the suspension to a filter. This filter can consist, for example, of the soil, ie the suspension is applied directly to the soil after stirring without waiting for the solid components to settle. The fly ash remains together with the immobilized pollutants on the soil surface, while the cleaned excess water seeps through the soil or, depending on the nature of the soil, runs off on the soil surface. Since, as already stated, the pollutants remain firmly bound to the fly ash, this is possible without any risk to the environment.
Auch dann, wenn auf einen Sedimentationsvorgang verzichtet wird, kann der homogenen dünnflüssigen Suspension insbeson¬ dere am Ende des Rührvorgangs Zement zugegeben werden, um die Festigkeits- und Dichtigkeitseigenschaften der er¬ härtenden Bestandteile nach dem Abfließen des Überschußwas- sers zu steuern. Vorteilhafterweise ist auch hier wiederum das Verhältnis von Flugasche zu Zement sehr viel größer als 1.Even if a sedimentation process is dispensed with, cement can be added to the homogeneous, thin suspension, in particular at the end of the stirring process, in order to control the strength and tightness properties of the hardening constituents after the excess water has drained away. Again, the ratio of fly ash to cement is advantageously much larger than 1.
Nach Entwässerung und eventueller Nachverdichtung kann das erhärtende Feststoffstabilisat beispielsweise als Dichtbau¬ stoff für schwindfreie und fugenfreie Anwendungen, z. B. im Deponiebau oder als Filterpreßkuchenimmobilisat wie ein Bauschutt ohne Deponiestandsicherheitsprobleme genutzt bzw. abgelagert werden.After dewatering and possible post-compaction, the hardening solid stabilizer can be used, for example, as a sealing material for shrink-free and joint-free applications, e.g. B. in landfill construction or as a filter press cake property such as building rubble without landfill safety problems or deposited.
Das erfindungsgemäße Verfahren ist bevorzugt bei Klär- und Sickerwässern anwendbar, die eine hohe Schadstoffelutions- rate hinsichtlich anorganischer und organischer Schadstoffe in Form von Feinstpartikeln und Lösungsprodukten mit einer unzureichenden alkalischen Bindung haben, wie dies bei¬ spielsweise bei Deponiesickerwässern der Fall ist. Das beschriebene Verfahren kann bei Flüssigaltlasten bevor¬ zugt in situ dergestalt erfolgen, daß der wäßrigen Flüs¬ sigaltlast Flugasche dergestalt eingemischt wird, daß eine homogene dünnflüssige, jedoch ständig dicker werdende Sus- pension mit Enddichte kleiner 1,5 kg/1 entsteht, wobei zur Verhinderung eines vorzeitigen sedimentativen Absetzens ein Rührprozeß bzw. Pumpenumwälzungsprozeß erfolgt (bei größe¬ ren Flüssigaltlasten technisch bedingt auch größer 4 h) und vor Sedimentation in diesen Prozeß Zement als Aktivator zu- gegeben werden kann. Unmittelbar nach Sedimentation kann das weitgehend gereinigte Wasser der ehemaligen Flüssigalt¬ last abgezogen und gegebenenfalls nachgereinigt werden, wo¬ bei anschließend das Sediment entweder als Baustoff aufge¬ nommen wird (u.U. Neuaufmischung und Aktivierung mit Ze- ment) oder als Dichtbaustoff auf der Sohle verbleibt (gleichzeitig in Kombination mit einer Sohlensanierung an¬ wendbar) .The process according to the invention can preferably be used in sewage and seepage waters which have a high pollutant elution rate with regard to inorganic and organic pollutants in the form of very fine particles and solution products with an insufficient alkaline bond, as is the case, for example, with landfill leachate. The process described can preferably be carried out in situ in the case of liquid waste loads in such a way that the aqueous liquid load is mixed with fly ash in such a way that a homogeneous, thin, but constantly thicker suspension with a final density of less than 1.5 kg / l is formed, In order to prevent premature sedimentation, a stirring process or pump circulation process takes place (for larger liquid waste loads, for technical reasons also longer than 4 hours) and cement can be added as an activator in this process before sedimentation. Immediately after sedimentation, the largely purified water from the former liquid waste can be drawn off and, if necessary, cleaned, whereby the sediment is then either taken up as a building material (possibly re-mixing and activation with cement) or remains on the sole as a sealing material ( can be used simultaneously in combination with a sole renovation).
Bei Verwendung zentraler ortsfester Abscheideanlagen kann das Verfahren unter Anwendung von Großrührwerken, z.B. Re¬ chenrührwerken, zur Anwendung gelangen, wobei das gerei¬ nigte Wasser und das Sediment für die Ableitung und Aufbe¬ reitung der Nutzung separat abgesaugt werden können, bzw. als dünnflüssige Phase im Gemisch zur Filtration über ge- sonderte Apparaturen (z.B. Filterpresse bei Klärschlämmen, wobei sich gereinigtes Wasser und ein verarbeitbarer, die Schadstoffe in sich bindender Filterkuchen als Baustoff, der noch gegebenenfalls mit Zement nachaktiviert werden muß, ergeben) oder über Boden abgegeben wird.When using central fixed separation systems, the process can be carried out using large agitators, e.g. Calculator agitators are used, whereby the cleaned water and sediment can be sucked off separately for the derivation and processing of the use, or as a thin liquid phase in a mixture for filtration via special equipment (eg filter press for sewage sludge) , resulting in purified water and a processable filter cake which binds the pollutants as a building material, which may still have to be reactivated with cement) or is released via the soil.
Bei mobiler Anlagentechnik sollte zur Kopplung von Aufbe¬ reitung und Transport des zu nutzenden Stabilisates (nach Wasserabtrennung) bevorzugt die Anwendung der Betonmisch¬ fahrzeuge mit Trommelinhalten von z.B. 6-, 7-, 9- oder 12 m3 erfolgen, in denen Flugasche und die zu reinigende wä߬ rige Flüssigkeit zudosiert werden und nach dem Rührprozeß mit oder ohne Zementaktivierung als dünnflüssiges Mischpro- dukt zur Filtration über Apparaturen oder Boden bzw. als separate Phasen (Flüssigkeit-nach Absaugung, Sediment) ab¬ geführt bzw. weitergenutzt werden. In mobile plant technology, the coupling of the preparation and transport of the stabilizer to be used (after water separation) should preferably be carried out using concrete mixers with drum contents of, for example, 6, 7, 9 or 12 m 3 , in which fly ash and the aqueous liquid to be cleaned are metered in and after the stirring process with or without cement activation as a low-viscosity mixing product. product for filtration through apparatus or soil or as separate phases (liquid after suction, sediment) can be removed or used further.
Claims
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19520422.0 | 1995-06-02 | ||
| DE19520422 | 1995-06-02 | ||
| DE19527006A DE19527006C2 (en) | 1995-06-02 | 1995-07-24 | Process for cleaning aqueous liquids contaminated with inorganic and / or organic pollutants |
| DE19527006.1 | 1995-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1996038383A1 true WO1996038383A1 (en) | 1996-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1996/000970 Ceased WO1996038383A1 (en) | 1995-06-02 | 1996-06-03 | Process for purifying aqueous liquids contaminated with inorganic and/or organic pollutants |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2799664A1 (en) * | 1999-10-14 | 2001-04-20 | Raymond Gleizes | Treatment of liquid, semi-liquid or solid media containing pollutants comprises using a particulate material comprising household waste incineration residue containing at least 20 wt.% calcium |
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| GB1485625A (en) * | 1973-06-01 | 1977-09-14 | Chappell C | Conversion of liquid hazardous wastes to solid form |
| US4226630A (en) * | 1979-04-03 | 1980-10-07 | Amax Resource Recovery Systems, Inc. | Leach-resistant solid bodies from fly ash and heavy metal sludge |
| WO1988002739A1 (en) * | 1986-10-10 | 1988-04-21 | Hölter Gmbh | Process for purifying polluted materials and use of the product thus obtained |
| US4741834A (en) * | 1986-05-08 | 1988-05-03 | The Dow Chemical Company | Method for underground support and removal of hazardous ions in ground waters |
| DE3732329A1 (en) * | 1987-09-25 | 1989-04-13 | Hoelter Heinz | Process for treating heavy-metal-containing waste waters |
| US4971702A (en) * | 1989-08-22 | 1990-11-20 | Western Research Institute | Selenium adsorption process |
-
1996
- 1996-06-03 WO PCT/DE1996/000970 patent/WO1996038383A1/en not_active Ceased
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|---|---|---|---|---|
| DE2339143A1 (en) * | 1972-12-18 | 1974-06-20 | Inst Energetik | Purifying industrial waste waters contg oils and fats - as emulsions or dispersions, by treatment with electrostatic filter ash to break emulsion and bind oils and fats |
| GB1485625A (en) * | 1973-06-01 | 1977-09-14 | Chappell C | Conversion of liquid hazardous wastes to solid form |
| US4226630A (en) * | 1979-04-03 | 1980-10-07 | Amax Resource Recovery Systems, Inc. | Leach-resistant solid bodies from fly ash and heavy metal sludge |
| US4226630B1 (en) * | 1979-04-03 | 1986-06-24 | ||
| US4741834A (en) * | 1986-05-08 | 1988-05-03 | The Dow Chemical Company | Method for underground support and removal of hazardous ions in ground waters |
| WO1988002739A1 (en) * | 1986-10-10 | 1988-04-21 | Hölter Gmbh | Process for purifying polluted materials and use of the product thus obtained |
| DE3732329A1 (en) * | 1987-09-25 | 1989-04-13 | Hoelter Heinz | Process for treating heavy-metal-containing waste waters |
| US4971702A (en) * | 1989-08-22 | 1990-11-20 | Western Research Institute | Selenium adsorption process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2799664A1 (en) * | 1999-10-14 | 2001-04-20 | Raymond Gleizes | Treatment of liquid, semi-liquid or solid media containing pollutants comprises using a particulate material comprising household waste incineration residue containing at least 20 wt.% calcium |
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