CH185428A - Process for the production of a fertilizer consisting of sewage sludge and peat. - Google Patents
Process for the production of a fertilizer consisting of sewage sludge and peat.Info
- Publication number
- CH185428A CH185428A CH185428DA CH185428A CH 185428 A CH185428 A CH 185428A CH 185428D A CH185428D A CH 185428DA CH 185428 A CH185428 A CH 185428A
- Authority
- CH
- Switzerland
- Prior art keywords
- peat
- sewage sludge
- production
- fertilizer
- heap
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/145—Feedstock the feedstock being materials of biological origin
-
- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Biotechnology (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fertilizers (AREA)
Description
Verfahren zur Herstellung eines aus Klärschlamm und Torfmull bestehenden Düngers. Es ist ein Verfahren bekannt, nach dem einer Abwasser-Kläranlage entnommmener, ausgefaulter Klärschlamm mit Torfmull ge mischt wird.
Der Verwendung des unmittelbar nach diesem Verfahren hergestellten Düngers haben sich alber beträchtliche Hindernisse in den Weg .gelegt. Namentlich weist dieser Dünger einen so hohen Wassergehalt auf. dass Amtsstellen sich veranlasst sahen, vor dessen Ankauf zu warnen.
Versuche, diesen Wassergehalt !auf maschinellem Wege, zum Beispiel durch Auspressen, herabzusetzen, haben bisher kein befriedigendes Ergebnis gezeitigt. Zunächst ist es überhaupt schwie- rig, das in Frage stehende Material gleich mässig zu pressen, und sodann werden mit dem Wasser auch Nährstoffe ausgepresst und abgeführt.
Ein weiterer Nachteil des in beschrie bener Weise hergestellten Düngers ist ein verhältnismässig hoher Gehalt an Tomaten samen. Diese den städtischen Kläranlagen aus den Häusern zufliessenden Samen ver- fieren auch bei monatelangem Lagern in den Faulkammern ihre Keimfähigkeit nicht. Ge langen sie mit !dem Dünger in den Boden, so gehen sie daher auf.
Das ist namentlich in. Gärtnereien unerwünscht und nachteilig, indem beim Auszeissen,der hier als Unkraut angesehenen Tomatenpflänzchen leicht auch richtige Sämlinge mitgerissen werden. In grösseren Pflanzungen ist mit jenem Aus reissen zudem ein unliebsamer Zeitaufwand verbunden.
Durch,das den Gegenstand der vorliegen den Erfindung bildende Verfahren gelingt es nun in einfacher Weise, den genannten Nach teilen: zu hoher Wassergehalt und Gehalt an Tomatensamen, gleichzeitig wirksam abzu helfen.
Das Verfahren geht beispielsweise etwa folgendermassen vor sich: Der Faulkammer einer Kläranlage wird Schlamm entnommen, der die Gärung in oder Hauptsache schon durchgemacht hat, also vielleicht etwa zwei Monate alt oder älter ist. Diesen Schlamm lässt mau, wie von dem ein- gangs erwähnten Verfahren her bekannt isst, einige Tage liegen,
damit sich ein Teil des in ihm enthaltenen Wassers ausscheiden kann. Nachher wird dieser Schlamm in be- kannter Weise mit Torfmull gemischt,
wobei man zweckmässigerweise etwas Phosphorsäure und Kali beigibt. Das Gemisch häuft man an gedecktem Orte auf und lässt es etwa vier zehn Tage liegen. Während dieser Zeit ver dunstet aus zden äussern .Schichten des Hau fens ein grosser Prozentsatz Wasser. Im Innern des Haufens dagegen entwickelt sich schon nachkurzer Zeit eine Temperatur von über<B>50'C,
</B> bei der die Tomateneamen er fahrungsgemäss zugrunde gehen und zugleich die Verdunstung der äussern Schichten geför dert wird. Alsdann bildet man aus dem Mate- rial der äussern, kühl gebliebenen 'Schieht dieses Haufens das Innere eines neuen Hau fens und deckt es mit,dem vorher innen ge legenen Material. Diesen Haufen lässt man liegen,
bis der Wassergehalt auf den ge- wünschten Betrag herabgesetzt ist und mit Sicherheit auf Vernichtung wenigstens .des Grossteils der Tomatensamen ,gerechnet wer den kann. Gegebenenfalls kann man aber die Umschichtung auch wiederholen.
Auf diese Weise wird ein sehr wirksamer Humusdünger erhalten, der hinsichtlich Wassergehalt behördlichen Anforderungen vollständig entspricht und frei von Unkraut samen ist.
Die Einzelheiten des Verfahrens richten sich nach den örtlichen, zeitlichen Verhält nissen, indem zum Beispiel der Gehalt des Klärschlammes an Tomatensamen nicht in allen Ortschaften und in der nämlichen Ort schaft nicht das ganze Jahr durch gleich ist.
Process for the production of a fertilizer consisting of sewage sludge and peat. A method is known according to which a sewage treatment plant withdrawn, digested sewage sludge is mixed with peat waste.
However, there are considerable obstacles in the way of using the fertilizer produced directly by this process. This fertilizer, in particular, has such a high water content. that government agencies felt compelled to warn against buying it.
Attempts to reduce this water content by machine, for example by squeezing, have so far not given satisfactory results. At first it is difficult in general to press the material in question evenly, and then nutrients are pressed out and carried away with the water.
Another disadvantage of the fertilizer produced in the manner described is a relatively high content of tomato seeds. These seeds, which flow into the municipal sewage treatment plants from the houses, do not lose their ability to germinate even after months of storage in the digestion chambers. If they get into the ground with the fertilizer, they will open up.
This is particularly undesirable and disadvantageous in gardening centers, in that when the tomato plants, which are here regarded as weeds, are eaten, correct seedlings are easily carried away with it. In larger plantations, this uprooting is also associated with an unpleasant expenditure of time.
By, the subject of the present invention forming the method, it is now possible in a simple manner to share the mentioned after: too high water content and content of tomato seeds, at the same time effectively helping AB.
The process goes as follows, for example: sludge is removed from the digester of a sewage treatment plant that has already undergone fermentation, or is mainly about two months old or older. As is known from the above-mentioned method, this mud is left to lie for a few days,
so that some of the water it contains can be excreted. Afterwards this sludge is mixed with peat mud in the known way,
it is convenient to add a little phosphoric acid and potash. The mixture is piled up in a covered place and left for about fourteen days. During this time, a large percentage of water evaporates from the outer layers of the heap. Inside the heap, on the other hand, a temperature of over <B> 50'C develops after a short time,
</B> in which experience has shown that the tomato trees perish and at the same time the evaporation of the outer layers is promoted. Then one forms from the material of the outer, “remained cool”. This pile creates the inside of a new pile and covers it with the material previously laid inside. This pile is left lying
until the water content has been reduced to the desired amount and it is certain that at least the majority of the tomato seeds will be destroyed. If necessary, however, the reallocation can also be repeated.
In this way, a very effective humus fertilizer is obtained, which fully complies with official requirements in terms of water content and is free from weed seeds.
The details of the procedure depend on the local and temporal conditions, for example the tomato seed content of sewage sludge is not the same in all localities and in the same locality throughout the year.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH185428T | 1939-04-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH185428A true CH185428A (en) | 1936-07-31 |
Family
ID=4433693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH185428D CH185428A (en) | 1939-04-21 | 1935-12-30 | Process for the production of a fertilizer consisting of sewage sludge and peat. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH185428A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE910414C (en) * | 1942-09-08 | 1954-05-03 | Auguste Heise Geb Krause | Process for the treatment of agricultural cultivated soils with fertilizer mixtures |
-
1935
- 1935-12-30 CH CH185428D patent/CH185428A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE910414C (en) * | 1942-09-08 | 1954-05-03 | Auguste Heise Geb Krause | Process for the treatment of agricultural cultivated soils with fertilizer mixtures |
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