DE3301120A1 - METHOD FOR DETOXIFYING WASTE WATER SLUDGE OF THE LEATHER INDUSTRY - Google Patents
METHOD FOR DETOXIFYING WASTE WATER SLUDGE OF THE LEATHER INDUSTRYInfo
- Publication number
- DE3301120A1 DE3301120A1 DE19833301120 DE3301120A DE3301120A1 DE 3301120 A1 DE3301120 A1 DE 3301120A1 DE 19833301120 DE19833301120 DE 19833301120 DE 3301120 A DE3301120 A DE 3301120A DE 3301120 A1 DE3301120 A1 DE 3301120A1
- Authority
- DE
- Germany
- Prior art keywords
- sludge
- suspension
- heavy metal
- ing
- dipl
- 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.)
- Withdrawn
Links
- 239000010802 sludge Substances 0.000 title claims description 20
- 238000000034 method Methods 0.000 title claims description 14
- 239000002351 wastewater Substances 0.000 title claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 18
- 239000002253 acid Substances 0.000 claims description 14
- 229910001385 heavy metal Inorganic materials 0.000 claims description 14
- 239000000725 suspension Substances 0.000 claims description 14
- 239000010801 sewage sludge Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000010985 leather Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 231100000331 toxic Toxicity 0.000 claims description 7
- 230000002588 toxic effect Effects 0.000 claims description 7
- 150000002500 ions Chemical class 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 4
- 150000007513 acids Chemical class 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 235000010755 mineral Nutrition 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims description 2
- 239000003929 acidic solution Substances 0.000 claims 1
- 230000002378 acidificating effect Effects 0.000 claims 1
- 229910021645 metal ion Inorganic materials 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 6
- 150000002736 metal compounds Chemical class 0.000 description 4
- 229910001430 chromium ion Inorganic materials 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical class [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- WLZRMCYVCSSEQC-UHFFFAOYSA-N cadmium(2+) Chemical compound [Cd+2] WLZRMCYVCSSEQC-UHFFFAOYSA-N 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910021432 inorganic complex Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/529—Processes or devices for preparing lime water
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F11/004—Sludge detoxification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/303—Complexing agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/22—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
- C02F2103/24—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof from tanneries
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- 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)
- Treatment Of Sludge (AREA)
- Removal Of Specific Substances (AREA)
- Processing Of Solid Wastes (AREA)
Description
MTA MÜSZAKI KEMIAI ΚϋΤΑΤΟ INTEZET, VESZPREM/UNGARNMTA MÜSZAKI KEMIAI ΚϋΤΑΤΟ INTEZET, VESZPREM / HUNGARY
Verfahren zur entgiftenden Behandlung von Abwasserschläjnmen der LederindustrieProcess for the detoxifying treatment of sewage sludge from the leather industry
Die Erfindung betrifft ein Verfahren zur entgiftenden Behandlung und gegebenenfalls Verwertung von toxische Schwermetallkomplexe und organische Verunreinigungen enthaltenden Ab-. wasserschrammen der Industrie, besonders der Lederindustrie· Bei der Gerbung und Zurichtung von Rohhäuten entstehen 80 bis 95% Wasser enthaltende Abwasserschlämme welch« auf Grund ihres hohen Gehalts an organischen Stoffen als vorzügliche pflanzliche Hährmittel verwertet werden könnten, wenn sie keine toxischen Bestandteile enthalten würden; aus den in der Technologie 0 der Lederfabrikation verwendeten Chemikalien kommen aber in diese Abwasserschläinme erhebliche Mengen von Schwermetallionen, besonders von Chromionen, deren toxische Wirkung eine derartige Verwertung dieser Abwasserschlämme unmöglich macht.The invention relates to a method for detoxifying treatment and, if necessary, utilization of toxic heavy metal complexes and waste containing organic impurities. water scrapes in industry, especially in the leather industry During the tanning and dressing of raw hides, waste water sludge containing 80 to 95% water is produced Their high organic content could be used as excellent vegetable nutrients if they did not contain any toxic components; from those in technology 0 chemicals used in leather production, however, considerable amounts of heavy metal ions enter these sewage gullies, especially of chromium ions, the toxic effect of which makes such a recycling of these sewage sludge impossible.
Eine Verbrennung dieser Abwasserschlämme kann wegen des hohen Y/assergehalts der Schlämme nicht wirtschaftlich durchgeführt werden. Es wurden zwar verschiedene Verfahren zur Verdichtung der in kolloidaler Verteilung anwesenden organischen Stoffe durch Verwendung von verschiedenen Flokkuliermifcteln vorgeschlagen, vm die Schlämme filtrierbar zu machen, eine auf wirtschaftliche Weise ausführbare Entwässerung dieser Abwasserschlämme ist aber noch immer eine ungelöste Aufgabe geblieben»Incineration of this sewage sludge cannot be carried out economically because of the high water content of the sludge. There have been various methods of compaction of the organic substances present in colloidal distribution by using various flocculating tools, vm to make the sludge filterable, an economical one Wise feasible dewatering of this sewage sludge is still an unsolved task »
Die viel Wasser enthaltenden Abwasserschlämme werden heutzutage meistens in Speicheiteichen unterbracht, wegen der toxischen Wirkung der Schwermetallverbindungen bereiten aberThe sewage sludge containing a lot of water is nowadays mostly housed in storage ponds, because of the toxic effects of the heavy metal compounds, however
auch die immer strenger v/erdenden Umweltschutz-Vorschriften bei dieser Lagerung der Abwasserschlämme immer grössere Schwierigkeiten«, also the increasingly strict environmental protection regulations with this storage of the sewage sludge increasing difficulties «,
Es wurde aus der Literatur bisher überhaupt kein brauch-So far there has been no need whatsoever from the literature
• · · M W • · · M W
bares Verfahren zum Entfernen der toxischen Bestandteile und zur Verwertung der wertvollen Komponenten der Abwasserschlamme bekannt.method for removing the toxic components and known for the recovery of the valuable components of sewage sludge.
Das Ziel der Erfindung war die Ausarbeitung eines Verfahrens, welches das Entfernen der Chrom- und sonstigen Schwermetallverbindungen aus den Abwasserschlammen auf solche Weise ermöglicht, dass dabei die organische Stoffe enthaltenden Rückstände in eine den Umweltschutz-Vorschriften entsprechende und sogar landwirtschaftlich verwertbare Form gebracht werden können.The aim of the invention was to devise a method which would remove the chrome and other Heavy metal compounds from the sewage sludge in such a way allows that thereby the organic substances containing Residues are brought into a form that complies with environmental protection regulations and can even be used for agriculture can.
Die Erfindung stammt aus der Erkenntnis, dass die in der Form von verschiedenen organischen und anorganischen Komplexen bzw. in Wasser unlöslichen Niederschlägen anwesenden Schwermetallverbindungen durch Mineralsäuren zersetzt und in wasserlösliche Form gebracht und aus dem Schlamm entfernt werden können.The invention stems from the knowledge that those in the form of various organic and inorganic Complex or water-insoluble precipitates present heavy metal compounds decomposed by mineral acids and converted into brought into water-soluble form and removed from the sludge.
Das Wesen der Erfindung besteht darin, dass der homo-The essence of the invention is that the homo-
3 · 33 · 3
genisierte, höchstens 100 kg/nr - vorteilhaft 20 bis 40 kg/m Trockenmaterial enthaltende Schlamm bei 20 bis 100 C unter intensivem Rühren mit Schwefelsäure oder mit einem neben mindestens 30% Schwefelsäure auch andere Mineralsäuren, wie Salzsäure, Salpetersäure und/oder Phosphorsäure enthaltenden Säuregemisch behandelt wird, und zwar auf solche Weise, dass die Säurekonzentration in der Suspension während der Säure zugabe 10 Gew.jS nicht überschreiten und der pH-Wert der Lösung nach Beendigung der chemischen Reaktionen niedriger als 1 sein soll. Ein Überschreiten des oben angegebenen maximalen Trockensubstanzgehalts der Suspension ist nachteilig, da in diesem1 Pail bei der Säurezugabe eine stabile Schaumbildung auftreten kann, wodurch die Geschwindigkeit der chemischen Reaktionen erheblich herabgesetzt wird.Genized, at most 100 kg / nr - advantageously 20 to 40 kg / m dry material containing sludge at 20 to 100 C with intensive stirring with sulfuric acid or with an acid mixture containing at least 30% sulfuric acid and other mineral acids such as hydrochloric acid, nitric acid and / or phosphoric acid is treated in such a way that the acid concentration in the suspension during the addition of acid does not exceed 10% by weight and the pH value of the solution should be lower than 1 after the end of the chemical reactions. Exceeding the above-specified maximum dry matter content of the suspension is disadvantageous, since stable foam formation can occur in this 1 pail when the acid is added, which considerably reduces the speed of the chemical reactions.
Es wäre ebenfalls nachteilig zu der Säurebehandlung ein Säuregemisch ohne Schwefelsäure zu verwendeiJrtvin solchen Fällen die Trennung, Sedimentierung oder Filtrierung der mit der Säure behandelten Suspension wesentlich schwieriger und langsamer wird, als bei den mit Schwefelsäure bzw» mit schwefelsäurehaltigen Säuregemischen behandelten Schlämmsuspensionen« It would also be detrimental to the acid treatment an acid mixture without sulfuric acid should be used in such The separation, sedimentation or filtration of the suspension treated with the acid is much more difficult and slower than with the slurry suspensions treated with sulfuric acid or »with acid mixtures containing sulfuric acid«
Die Reaktionsgeschwindigkeit der Zersetzung der Komplexe ist schon bei Raumtemperatur genügend gross, so dass die Reaktion schon bei der normalen Temperatur der Suspension durchge-3-0 führt werden kann, gewünschtenfalls kann man aber die Reaktionsgeschwindigkeit durch Erwärmen der Suspension noch steigern.The reaction rate of the decomposition of the complexes is sufficiently large, even at room temperature, that the reaction already carried out at the normal temperature of the suspension 3-0 can be performed, but if desired you can adjust the reaction rate increase by heating the suspension.
Nach der Beendigung der Reaktion kann die Feststoff-After the reaction has ended, the solids
-Konzentration der Suspension z»B. durch Sedimentieren noch er--Concentration of the suspension eg. due to sedimentation
•jsircL. j,
höht werden, dannVaer Schlamm mxt Wasser oder mit verdünnter
Schwefelsäure bis zum vollständigen Entfernen der Schwermetallionen gewaschen, mit Kalkmilch neutralisiert und von der supernatanten
Flüssigkeit abgetrennt» Aus der abgetrennten Lösung können die Schwermetallsalze auf an sich bekannte Weise gefällt
und auf geeignete V/eise verworfen oder gereinigt und verwertet werden.• jsircL. j,
then washed with water or dilute sulfuric acid until the heavy metal ions are completely removed, neutralized with milk of lime and separated from the supernatant liquid cleaned and recycled.
Das prinzipielle Arbeitsschema des erfindungsgemässen Verfahrens ist in der Abbildung 1 veranschaulicht. Die näheren
Einzelheiten des Verfahrens können aus deu nachfolgenden Beispiel entnommen werden.
Beispiel The basic working diagram of the method according to the invention is illustrated in FIG. The details of the process can be found in the example below.
example
Es wird ein Lederf&brikation-Abwasserschlamm der folgenden Zusammensetzung verarbeitet:A leather f & brication sewage sludge of the following composition is processed:
Trockensubstanzgehalt 200 kg/mDry matter content 200 kg / m
Organische Stoffe . 100 kg/mOrganic substance . 100 kg / m
Chromionengehalt 12 kg/m # Chromium ion content 12 kg / m #
Ferner enthält der Schlamm Spuren von Zink- und Cadmiumionen, sowie erhebliche Mengen von Eisen- und Calciumionen.The sludge also contains traces of zinc and cadmium ions, as well as significant amounts of iron and calcium ions.
Der Schlamm wird im Homogenisator 1 im Volumverhältnis 1:6 mit Wasser, oder mit einem aus der Fabrikation stammenden, Säure und Chromionen enthaltenden Abwasser vermischt. Die quasihomogene Suspension wird in den Reaktor 2 geleitet, wo zu je 1 m aufzuarbeitendem Schlamm 150 kg 96%-ige Schwefelsäure zugesetzt werden und die Aufschlämmung bei der gegebenen Temperatur '60 Minuten lang lebhaft gerüirt wird. Anschliessend wird der Feststoffgehalt der Suspension im Separator 3 konzentriert, der auf diese Weise konzentrierte Schlamm wird im Wasch-Separator 4 durch Waschen von den Schwermetallionen befreit und dann im Neutralisier-Separator 5 mit Kalkmilch neutralisiert» Von hier werden einerseits der von den toxischen Schwermetallionen befreite, mit Kalkmilch neutralisierte Schlamm und andererseits ein in den Homogenisator 1 zurückführbares Waschwasser entnommen·The sludge is mixed in the homogenizer 1 in a volume ratio of 1: 6 with water, or with a Waste water containing acid and chromium ions mixed. The quasi-homogeneous suspension is fed into the reactor 2, where to 150 kg of 96% sulfuric acid per 1 m of sludge to be processed be added and the slurry at the given temperature 'Is agitated vigorously for 60 minutes. Then will the solids content of the suspension is concentrated in separator 3, the sludge concentrated in this way is freed from the heavy metal ions in the washing separator 4 by washing and then neutralized with milk of lime in the neutralizing separator 5 »Von here on the one hand the sludge freed from the toxic heavy metal ions and neutralized with milk of lime and on the other hand a wash water that can be returned to the homogenizer 1 is withdrawn
Die aus dem Separator 3 entnommene chromhaltige Lösung wird in den Abscheider 6 weitergeleitet, wo die Metallsalze durch Zugabe von Kalkmilch bei pH 8-10 gefällt werden. Der auf diese Weise erhaltene, Schwermetallionen enthaltende Niederschlag wird dann im Separator 7 von dem kalkhaltigen Wasser abgetrennt.The chromium-containing solution removed from the separator 3 is passed on to the separator 6, where the metal salts are precipitated by adding milk of lime at pH 8-10. The one on this The precipitate obtained in this manner and containing heavy metal ions is then separated off from the calcareous water in the separator 7.
Das erfindungsgemässe Verfahren zeigt die folgenden. Vorteile:"The method of the present invention shows the following. Advantages:"
- durch das neue Verfahren können die mit der Unterbringung der Abwasserschlamme der Lederfabrikation verbundenen Probleme gelöst v/erden; es sind keine Speicherteiche erforderlich und auch die mit der Weiterleitung des Schlammes entstehenden Transportkosten können eingespart werden;- The new process can solve the problems associated with the disposal of the sewage sludge from the leather factory v / earth; no storage ponds are required and so are the transport costs associated with forwarding the sludge can be saved;
- der grosse Mengen von organischen Stoffen enthaltende Schlamm kann in der Landwirtschaft z.B. zur Bodenmelioration verwertet v/erden;- The sludge, which contains large amounts of organic substances, can be used in agriculture, e.g. for soil improvement v / earth;
durch die Weiterverarbeitung der zurückgewonnenen schwermetallsalzhaltigen Miederschläge können die darin enthaltenen wertvollen Metallverbindungen wieder verwertet werden·through the further processing of the recovered heavy metal salt-containing The valuable metal compounds contained in it can be recycled.
LeerseiteBlank page
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU82100A HU185194B (en) | 1982-01-14 | 1982-01-14 | Method for detoxication mixing tannery sewage sludges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3301120A1 true DE3301120A1 (en) | 1983-07-28 |
Family
ID=10947909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19833301120 Withdrawn DE3301120A1 (en) | 1982-01-14 | 1983-01-14 | METHOD FOR DETOXIFYING WASTE WATER SLUDGE OF THE LEATHER INDUSTRY |
Country Status (10)
| Country | Link |
|---|---|
| CS (1) | CS246057B2 (en) |
| DD (1) | DD209430A5 (en) |
| DE (1) | DE3301120A1 (en) |
| ES (1) | ES518907A0 (en) |
| GB (1) | GB2113199B (en) |
| HU (1) | HU185194B (en) |
| IT (1) | IT1160174B (en) |
| PL (1) | PL139584B1 (en) |
| RO (1) | RO86780B (en) |
| YU (1) | YU6383A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3428535A1 (en) * | 1984-08-02 | 1986-02-13 | Siekmann, Helmut E., Prof.Dr.-Ing., 1000 Berlin | METHOD AND DEVICE, IN PARTICULAR FOR THE CONDITIONING OF SEWAGE SLUDGE |
| DE3503199A1 (en) * | 1985-01-31 | 1986-08-07 | Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck | Process for converting sewage sludges into soil improvers and/or fertilisers |
| DE3627253A1 (en) * | 1986-08-12 | 1988-02-25 | Linde Ag | Process for the biological treatment of substrates containing organic substances |
| DE3919788C1 (en) * | 1989-06-16 | 1990-07-05 | Siebtechnik Gmbh, 4330 Muelheim, De | |
| US5720882A (en) * | 1993-08-26 | 1998-02-24 | Kemira Kemi Ab | Treatment method for waste water sludge comprising phoshorous, heavy metals and at least one metal |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITRM20010671A1 (en) * | 2001-11-12 | 2003-05-12 | Sicit Chemitech S P A | CHROME-BASED PRODUCT IN COMPOSITION WITH HYDROLYZED PROTEINS AND PROCESS FOR ITS OBTAINING. |
| AU2003900241A0 (en) * | 2003-01-21 | 2003-02-06 | Australian Organic Resources Pty Ltd | The extraction and treatment of heavy metals in sewage sludge |
| ITRM20050425A1 (en) * | 2005-08-05 | 2007-02-06 | Sicit Chemitech S P A | PROCESS FOR THE PRODUCTION OF PRODUCTS BASED ON HYDRAULIC PROTEINS IN COMPOSITION WITH MANGANESE. |
| JP5985925B2 (en) * | 2012-08-20 | 2016-09-06 | 水ｉｎｇ株式会社 | Method and apparatus for treating waste liquid containing heavy metal |
-
1982
- 1982-01-14 HU HU82100A patent/HU185194B/en not_active IP Right Cessation
-
1983
- 1983-01-10 RO RO109659A patent/RO86780B/en unknown
- 1983-01-11 ES ES518907A patent/ES518907A0/en active Granted
- 1983-01-11 CS CS83182A patent/CS246057B2/en unknown
- 1983-01-12 PL PL1983240123A patent/PL139584B1/en unknown
- 1983-01-12 YU YU00063/83A patent/YU6383A/en unknown
- 1983-01-12 DD DD83247194A patent/DD209430A5/en unknown
- 1983-01-13 IT IT19091/83A patent/IT1160174B/en active
- 1983-01-14 GB GB08300987A patent/GB2113199B/en not_active Expired
- 1983-01-14 DE DE19833301120 patent/DE3301120A1/en not_active Withdrawn
Non-Patent Citations (4)
| Title |
|---|
| DE-Z.: "Kommunalwirtschaft", 1971, S.332-337 * |
| IMHOFF, "Taschenbuch der Stadtentwässerung", 24.Auflage, 1976, S.237-239 * |
| Schriftenreihe "Gewäserschutz/Wasser/Abwasser", Bd.6, 1971, S.159-175 * |
| US-Journal "WPCF" 1/1981, S.25-32 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3428535A1 (en) * | 1984-08-02 | 1986-02-13 | Siekmann, Helmut E., Prof.Dr.-Ing., 1000 Berlin | METHOD AND DEVICE, IN PARTICULAR FOR THE CONDITIONING OF SEWAGE SLUDGE |
| DE3503199A1 (en) * | 1985-01-31 | 1986-08-07 | Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck | Process for converting sewage sludges into soil improvers and/or fertilisers |
| DE3627253A1 (en) * | 1986-08-12 | 1988-02-25 | Linde Ag | Process for the biological treatment of substrates containing organic substances |
| DE3919788C1 (en) * | 1989-06-16 | 1990-07-05 | Siebtechnik Gmbh, 4330 Muelheim, De | |
| US5720882A (en) * | 1993-08-26 | 1998-02-24 | Kemira Kemi Ab | Treatment method for waste water sludge comprising phoshorous, heavy metals and at least one metal |
Also Published As
| Publication number | Publication date |
|---|---|
| RO86780A (en) | 1985-05-20 |
| PL139584B1 (en) | 1987-02-28 |
| GB2113199A (en) | 1983-08-03 |
| CS246057B2 (en) | 1986-10-16 |
| DD209430A5 (en) | 1984-05-09 |
| HU185194B (en) | 1984-12-28 |
| YU6383A (en) | 1985-10-31 |
| ES8402549A1 (en) | 1984-03-01 |
| IT8319091A0 (en) | 1983-01-13 |
| GB8300987D0 (en) | 1983-02-16 |
| RO86780B (en) | 1985-05-31 |
| ES518907A0 (en) | 1984-03-01 |
| PL240123A1 (en) | 1984-06-18 |
| GB2113199B (en) | 1985-07-10 |
| IT1160174B (en) | 1987-03-04 |
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| 8136 | Disposal/non-payment of the fee for publication/grant |