DE3021926C2 - Process for better utilization of a closed digester - Google Patents

Process for better utilization of a closed digester

Info

Publication number
DE3021926C2
DE3021926C2 DE3021926A DE3021926A DE3021926C2 DE 3021926 C2 DE3021926 C2 DE 3021926C2 DE 3021926 A DE3021926 A DE 3021926A DE 3021926 A DE3021926 A DE 3021926A DE 3021926 C2 DE3021926 C2 DE 3021926C2
Authority
DE
Germany
Prior art keywords
substrate
better utilization
liquid
digester
closed digester
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
Application number
DE3021926A
Other languages
German (de)
Other versions
DE3021926A1 (en
Inventor
Des Erfinders Auf Nennung Verzicht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wilhelm Roediger and Co 6450 Hanau De GmbH
Original Assignee
Wilhelm Roediger and Co 6450 Hanau De GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wilhelm Roediger and Co 6450 Hanau De GmbH filed Critical Wilhelm Roediger and Co 6450 Hanau De GmbH
Priority to DE3021926A priority Critical patent/DE3021926C2/en
Publication of DE3021926A1 publication Critical patent/DE3021926A1/en
Application granted granted Critical
Publication of DE3021926C2 publication Critical patent/DE3021926C2/en
Expired legal-status Critical Current

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
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
    • 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
    • C02F11/02—Biological treatment
    • C02F11/04—Anaerobic treatment; Production of methane by such processes

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Treatment Of Sludge (AREA)

Description

2020th

Die Erfindung bezieht sich auf ein Verfahren zur besseren Ausnutzung eines geschlossenen Faulraums nach dem Oberbegriff des Anspruchs 1.The invention relates to a method for better utilization of a closed digester the preamble of claim 1.

Bei der Abwasser-Reinigung zurückbleibende, aus Feststoffen und Wasser bestehende Substrate werden normalerweise einem anaeroben Abbauprozeß unterworfen, der eine Aufenthaltungszeit der Substrate von mehreren Tagen bis zu mehreren Wochen in einem oder mehreren Reaktoren erfordert. In der kommunalen Abwässertechnik werden solche Reaktoren Faulbehälter genannt, die zur Zeit bis zu einer Größe von mehr als 10 000 m3 gebaut werden. Daraus geht hervor, daß für den Bau solcher Faulbehälter sehr hohe Kosten entstein. Substrates consisting of solids and water that remain in the sewage treatment are normally subjected to an anaerobic degradation process which requires the substrates to remain in one or more reactors for from several days to several weeks. In municipal sewage technology, such reactors are called digesters and are currently being built up to a size of more than 10,000 m 3 . This shows that the construction of such digesters is very expensive.

Ein Verfahren der eingangs genannten Art ist durch das Lehr- und Handbuch der Abwassertechnik, Band 3, 1978, Seite 182 bis 184, bekannt. Dem auszufaulenden Substrat wird aus einem Schwimmschlammabzug ein Teil seines Fiüssigkeitsgehaltes entzogen. Während des Umwälzens kann dabei gemäß der genannten Buchstel-Ie kein Flüssigkeitsentzug stattfinden, da die Flüssigkeit sich während des Mischens nicht absetzen kann.A method of the type mentioned at the beginning is described in the teaching and manual of wastewater technology, Volume 3, 1978, pages 182 to 184, known. The substrate to be digested is turned into a floating sludge vent Part of its liquid content withdrawn. During the circulation, according to the said letters-Ie no dehydration will take place as the fluid cannot settle while mixing.

Der Erfindung liegt die Aufgabe zugrunde, bei einem Verfahren der eingangs genannten Art beim Faulprozeß freiwerdende Flüssigkeit während des Umwälzens zu entfernen.The invention is based on the object of a method of the type mentioned in the digestion process to remove released liquid during circulation.

Die Lösung dieser Aufgabe besteht darin, daß dem Substrat während des Umwälzens außerhalb des Faulraums Flüssigkeit entzogen wird.The solution to this problem is that the substrate during circulation outside of the digester Liquid is withdrawn.

Eine vorteilhafte Ausgestaltung dieses Verfahrens ist Gegenstand des Anspruchs 2.An advantageous embodiment of this method is the subject of claim 2.

Der Flüssigkeitsentzug richtet sich nach der Art des vorliegenden Schlammes. )e nachdem, ob zum Beispiel inhomogener Rohschlamm oder flockiger biologischer Schlamm vorliegt, wird die jeweils am besten geeignete Entwässerungsmethode gewählt. Vorteilhafterweise wird inhomogener Rohschlamm besser mit einem Filter, biologischer Schlamm mit einer Zentrifuge entwässert.The dehydration depends on the type of sludge present. ) e after whether for example Inhomogeneous raw sludge or fluffy biological sludge is the most suitable one Drainage method chosen. Advantageously, inhomogeneous raw sludge is better with a filter, biological sludge dewatered with a centrifuge.

Dem Fachmann wird aus den vorangehenden Ausführungen ersichtlich, daß mit der vorliegenden Erfindung t>o nicht nur vorhandenes Bchältervolunicn besser «uisgeniil/i wird, sondern selbstverständlich auch bei Ncuplanung von vornherein die Behälter wesentlich kleiner dimensioniert und damit erhebliche Kosten gespart werden können. b5It will be apparent to those skilled in the art from the foregoing that, with the present invention, t> o not only existing container volume better "uisgeniil / i becomes, but of course also with Ncupplanning the containers are much smaller from the start dimensioned and thus considerable costs can be saved. b5

Claims (2)

Patentansprüche:Patent claims: 1. Verfahren zur besseren Ausnutzung eines geschlossenen Faulraums, bei dem ein auszufaulendes Substrat, vorzugsweise Klärschlamm, umgewälzt und mittels einer mechanischen Einrichtung von einem Teil seines Fiüssigkeitsgehaltes getrennt wird, dadurch gekennzeichnet, daß dem Substrat während des Umwälzens außerhalb des Faulraums Flüssigkeit entzogen wird.1. Method for better utilization of a closed digestion room, in which a digested Substrate, preferably sewage sludge, circulated and by means of a mechanical device from one Part of its liquid content is separated, characterized in that the substrate while circulating outside the digester Liquid is withdrawn. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Entziehen von Flüssigkeit in dem Umwälzkreislauf erst nach einem Vermischen des Umwälzsubstrats mit dem zuzuführenden Substrat erfolgt2. The method according to claim 1, characterized in that the removal of liquid in the Circulation circuit only after the circulation substrate has been mixed with the substrate to be supplied he follows
DE3021926A 1980-06-11 1980-06-11 Process for better utilization of a closed digester Expired DE3021926C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE3021926A DE3021926C2 (en) 1980-06-11 1980-06-11 Process for better utilization of a closed digester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3021926A DE3021926C2 (en) 1980-06-11 1980-06-11 Process for better utilization of a closed digester

Publications (2)

Publication Number Publication Date
DE3021926A1 DE3021926A1 (en) 1982-03-04
DE3021926C2 true DE3021926C2 (en) 1984-06-07

Family

ID=6104368

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3021926A Expired DE3021926C2 (en) 1980-06-11 1980-06-11 Process for better utilization of a closed digester

Country Status (1)

Country Link
DE (1) DE3021926C2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT407872B (en) * 1997-05-20 2001-07-25 Andritz Patentverwaltung METHOD AND DEVICE FOR DRAINING SLUDGE, ESPECIALLY SLUDGE

Also Published As

Publication number Publication date
DE3021926A1 (en) 1982-03-04

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8363 Opposition against the patent
8330 Complete renunciation