DE1947492A1 - Process for the digestion and further processing of Klaerschlaemmen - Google Patents
Process for the digestion and further processing of KlaerschlaemmenInfo
- Publication number
- DE1947492A1 DE1947492A1 DE19691947492 DE1947492A DE1947492A1 DE 1947492 A1 DE1947492 A1 DE 1947492A1 DE 19691947492 DE19691947492 DE 19691947492 DE 1947492 A DE1947492 A DE 1947492A DE 1947492 A1 DE1947492 A1 DE 1947492A1
- Authority
- DE
- Germany
- Prior art keywords
- sludge
- sewage sludge
- digestion
- substances
- hydrochloric acid
- 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.)
- Pending
Links
Classifications
-
- 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
-
- 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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
Description
Verfahren zur Aufschließung und Weiterverarbeitung von Klärschlämmen T)ie vorliegende Erfindung bezieht sich auf ein Verfahren zur Aufschließung und Weiterverarbeitung von Klärschlämmen, bei welchem den pumpfähingen Klärschlämmen MIneralsäueren zugesetzt werden, bis der pH-Wert von 5 unterschritten ist, wonach die sich an der Oberfläche des Beckens angesammelten hydrophoben Substanzen entfernt und die gefällten hochmolekularen Substanzen biologischen Ursprunges mit den mit ihnen abgesunkenen Schlammsubstanzen vorn Überstand abgetrennt werden, und dieser durch Nachfällung zur Beseitigung eventuell noch vorhandener Schlammbestandteile sicker- und gemacht wird gemäß Hauptpatent. ... ... (Patentanmeldung P19 35 229.5). Method for the digestion and further processing of sewage sludge T) The present invention relates to a method for the digestion and further processing of sewage sludge, in which the pumpable sewage sludge mineral acids are added until the pH value falls below 5, after which the on the surface of the Hydrophobic substances accumulated in the basin are removed and the precipitated high molecular weight substances of biological origin are separated from the supernatant with the sludge substances that have sunk with them, and this soaks and sinks through subsequent precipitation to remove any sludge components that may still be present is made according to the main patent. ... ... (patent application P19 35 229.5).
Bei der Durchführung dieses Verfahrens hat sich gezeigt, daß insbesondere bei der AuSschließung großer Faulschlammmengen Schwierigkeiten auftreten. Nach dem Mineralsäurezusatz werden zwar die hydrophoben Substanzen an die Oberfläche geschwemmt, während die hochmolekularen Substanzen biologischen Ursprunges gefällt werden, doch geraten letztere nach einiger Zeit wieder in Bewegung, da durch den Eigenstoffwechsel der Mikroorganismen die Entmischung unterbunden und letztlich ausgeglichen wird.When carrying out this process it has been shown that in particular difficulties arise when removing large amounts of digested sludge. After this Mineral acid addition, the hydrophobic substances are washed to the surface, while the high molecular weight substances of biological origin are precipitated, yes the latter start moving again after a while, because of their own metabolism of the microorganisms, the segregation is prevented and ultimately balanced.
In Weiterbildung des Verfahrens gemäß Hauptpatent . *.. .0.In further development of the process according to the main patent. * ... .0.
(Patentanmeldung P 19 35 229.5) ist nun gefunden worden, daß sich diese Schwierigkeit dadurch beheben läßt, daß die Klärschlämme (Faulschlämme unterschiedlicher Verweildauer im Faulturm) mit Mineralsäuren lediglich angesäuert und die Feineinstellung des pH-Wertes anschließend mit rauchender Salzsäure vorgenommen wird. Vorzugsweise wird das Ansäuern mit 20 bis 98 i60'-iger Schwefelsäure vorgenommen. In einer weiteren AusfuhrungsSorm des erfindungsgemäßen Verfahrens wird sowohl zum Ansäuern als auch zur Feineinstellung des pH-Wertes rauchende Salzsäure verwendet.(Patent application P 19 35 229.5) has now been found that This problem can be solved by the fact that the sewage sludge (digested sludge of different Dwell time in the digestion tower) with mineral acids only acidified and the fine adjustment the pH value is then made with fuming hydrochloric acid. Preferably the acidification is carried out with 20 to 98% sulfuric acid. In another AusungsSorm of the method according to the invention is both for acidification and fuming hydrochloric acid is used to fine-tune the pH.
Es hat sich nämlich überraschenderweise gezeigt, daß durch den Zusatz der rauchenden Salzsäure der isoelektrische Punkt der überwiegenden Eiweißkörper erreicht und zugleich durch das in dieser Säure gelöste Chlorgas der mikrobielle Stoffwechsel durch Abtöten der Mikroorganismen ausgeschaltet wird.It has been shown, surprisingly, that the addition of fuming hydrochloric acid, the isoelectric point of the predominant protein bodies achieved and at the same time by the chlorine gas dissolved in this acid the microbial metabolism is switched off by killing the microorganisms.
Das Ansäuern der Klärschlämme zur Entmischung kann mit irgendeiner Mineralsäure vorgenommen werden, für den Erfolg der Fällung, für das Abtöten der Mikroorganismen und damit letztlich für die Schlammaufschließung entscheidend ist der Nachsatz von rauchender Salzsäure0 Am wirtschaftlichsten hat sich die Kombination von roher Schwefelsäure mit rauchender Salzsäure erwiesen; man setzt den Klärschlämmen rohe konzentrierte Schwefelsäure zu, bis zum annähernden Erreichen des isoelektrischen Bereiches der zu fällenden hochmolekularen Substanzen, also bis zur annähernden Erschöpfungder Pufferkapazität der Hochpolymeren, vorwiegend der Proteine, und gibt dann zur Feineinstellung des pH-Wertes rauchende Salzsäure, die zugleich eine praktisch vollständige Unterbindung der Säulnisprozesse im Saulschlsmm bewirkt.The acidification of the sewage sludge for segregation can be done with any Mineral acids are made for the success of the precipitation, for the killing of the Microorganisms and thus ultimately for the sludge digestion is crucial The addition of fuming hydrochloric acid0 The combination has proven to be the most economical proved by crude sulfuric acid with fuming hydrochloric acid; one sets the sewage sludge crude concentrated sulfuric acid until the isoelectric is almost reached Range of the high molecular weight substances to be precipitated, i.e. up to approximate Exhaustion of the buffering capacity of the high polymers, predominantly proteins, and gives then fuming hydrochloric acid to fine-tune the pH value, which is also a practical causes complete suppression of the columnar processes in the Saulschlsmm.
Da in den bei dem vorgeschlagenen Verfahren anfallenden sedimentierten und gefällten Schlämmen das mikrobielle Wachstum weitgehend gehemmt ist, kann man das gefällte Gut auch direkt einer Vakuumtrocknung zuführen.Since sedimented in the resulting in the proposed method and precipitated sludge, microbial growth is largely inhibited the precipitated material can also be fed directly to vacuum drying.
Ein weiterer Vorteil des vorgeschlagenen Verfahrens besteht darin, daß die Mikroorganismen durch den Gehalt an freiem Chlorgas in der rauchenden Salzsäure und nicht durch die Azidität getötet werden, so vermeidet man unnötige Neutralisationskosten durch Übersäuerung der Abwässer und des gefällten Gutes unter Schonung der gefällten Substanzen für eine weitere Verwendung.There is another advantage of the proposed method in this, that the microorganisms through the content of free chlorine gas in the smoking hydrochloric acid and are not killed by the acidity, this avoids unnecessary neutralization costs by acidification of the wastewater and the precipitated goods while protecting the precipitated Substances for further use.
Claims (3)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691947492 DE1947492A1 (en) | 1969-07-11 | 1969-09-19 | Process for the digestion and further processing of Klaerschlaemmen |
DE19691956107 DE1956107A1 (en) | 1969-07-11 | 1969-11-07 | Slime digestion and lime treatment of - concentrate |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691935229 DE1935229A1 (en) | 1969-07-11 | 1969-07-11 | Disintegrating sewage sludge |
DE19691947492 DE1947492A1 (en) | 1969-07-11 | 1969-09-19 | Process for the digestion and further processing of Klaerschlaemmen |
DE19691956107 DE1956107A1 (en) | 1969-07-11 | 1969-11-07 | Slime digestion and lime treatment of - concentrate |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1947492A1 true DE1947492A1 (en) | 1971-04-01 |
Family
ID=32718360
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19691947492 Pending DE1947492A1 (en) | 1969-07-11 | 1969-09-19 | Process for the digestion and further processing of Klaerschlaemmen |
DE19691956107 Pending DE1956107A1 (en) | 1969-07-11 | 1969-11-07 | Slime digestion and lime treatment of - concentrate |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19691956107 Pending DE1956107A1 (en) | 1969-07-11 | 1969-11-07 | Slime digestion and lime treatment of - concentrate |
Country Status (1)
Country | Link |
---|---|
DE (2) | DE1947492A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2347314A1 (en) * | 1975-11-18 | 1977-11-04 | Champion Int Corp | PROCESS FOR TREATING ACTIVE SLUDGE TO FACILITATE ITS THICKNESS |
FR2348891A1 (en) * | 1976-04-21 | 1977-11-18 | Hartley Simon Ltd | METHOD AND APPARATUS FOR TREATMENT OF SEWAGE WATER |
EP0005011A1 (en) * | 1978-04-15 | 1979-10-31 | Simon-Carves Limited | A method of removing metallic impurities from sewage sludge |
FR2496084A1 (en) * | 1980-12-12 | 1982-06-18 | Upr Vodoprov Kanaliztr Khoz Vo | PROCESS FOR TREATING WASTEWATER SLUDGE |
DE3124597A1 (en) * | 1981-06-23 | 1983-01-05 | Fa. Helmuth Dallmer, 5760 Arnsberg | Fat separator |
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 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2656362A1 (en) * | 1976-12-13 | 1978-06-15 | Rolf Flach | METHOD AND DEVICE FOR DETERMINING WASTE WATER |
FR2543401B1 (en) * | 1983-03-30 | 1986-01-17 | Spmp Sa | GUARDIAN FOR CULTIVATED PLANTS IN POTS OR BINS |
-
1969
- 1969-09-19 DE DE19691947492 patent/DE1947492A1/en active Pending
- 1969-11-07 DE DE19691956107 patent/DE1956107A1/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2347314A1 (en) * | 1975-11-18 | 1977-11-04 | Champion Int Corp | PROCESS FOR TREATING ACTIVE SLUDGE TO FACILITATE ITS THICKNESS |
FR2348891A1 (en) * | 1976-04-21 | 1977-11-18 | Hartley Simon Ltd | METHOD AND APPARATUS FOR TREATMENT OF SEWAGE WATER |
EP0005011A1 (en) * | 1978-04-15 | 1979-10-31 | Simon-Carves Limited | A method of removing metallic impurities from sewage sludge |
FR2496084A1 (en) * | 1980-12-12 | 1982-06-18 | Upr Vodoprov Kanaliztr Khoz Vo | PROCESS FOR TREATING WASTEWATER SLUDGE |
DE3127623A1 (en) * | 1980-12-12 | 1982-09-16 | Upravlenie vodoprovodno-kanalizacionnogo chozjajstva, Leningrad | Process for the treatment of effluent sludges |
DE3124597A1 (en) * | 1981-06-23 | 1983-01-05 | Fa. Helmuth Dallmer, 5760 Arnsberg | Fat separator |
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 |
Also Published As
Publication number | Publication date |
---|---|
DE1956107A1 (en) | 1971-06-24 |
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