EP0086818A1 - Procede de digestion biochimique de substances organiques - Google Patents

Procede de digestion biochimique de substances organiques

Info

Publication number
EP0086818A1
EP0086818A1 EP19820902723 EP82902723A EP0086818A1 EP 0086818 A1 EP0086818 A1 EP 0086818A1 EP 19820902723 EP19820902723 EP 19820902723 EP 82902723 A EP82902723 A EP 82902723A EP 0086818 A1 EP0086818 A1 EP 0086818A1
Authority
EP
European Patent Office
Prior art keywords
treatment stage
substrate
stage
return
aerobic
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Withdrawn
Application number
EP19820902723
Other languages
German (de)
English (en)
Inventor
Jürgen Zink
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.)
Menzel and Co GmbH
Original Assignee
Menzel and Co 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 Menzel and Co GmbH filed Critical Menzel and Co GmbH
Publication of EP0086818A1 publication Critical patent/EP0086818A1/fr
Withdrawn legal-status Critical Current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
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes

Definitions

  • the invention relates to a method for biochemical conversion, in particular for waste water treatment, waste water or sewage sludge being fed to an aerobic treatment stage for aerobic treatment and an anaerobic treatment stage for a digestion process.
  • wastewater treatment it is known to carry out a sludge treatment both in an aerobic stage and in an anaerobic stage in order to degrade differently accessible substances in the substrate through the various processes.
  • the aerobically degradable substances are first digested in the aerobic treatment stage, while the anaerobically digestible substances of the substrate are not yet accessible in this treatment phase.
  • the anaerobically digestible substances are only accessible after the substrate has been passed on from the aerobic treatment stage to the anaerobic treatment stage in the latter.
  • This anaerobic digestion process also forms other aerobically more easily degradable substances that were previously difficult to access due to the higher oxidation level of the molecule.
  • the now more aerobically degradable substances can no longer be broken down in the anaerobic treatment stage, since there is no aerobic process, but only an anaerobic process, so that a not insignificant decomposition process is not used in the known process, so that the Processing is impaired or delayed.
  • the object of the invention is to improve a method for wastewater treatment of the type described at the outset in such a way that more intensive treatment is achieved and a disintegration of the proportions of material not previously digested in the opposite treatment process for a corresponding one Degradation is possible.
  • This object is achieved according to the invention in that at least a partial return of the substrate to be treated, such as waste water or sewage sludge, takes place from the anaerobic treatment stage to the aerobic treatment stage and / or at least a partial return of the substrate from the aerobic treatment stage to the anaerobic treatment stage.
  • a partial return of the substrate to be treated such as waste water or sewage sludge
  • Fig. 1 shows a process diagram with a pre-thickening and a post-thickening and a direct partial return from the anaerobic treatment stage to the aerobic treatment stage
  • FIG. 3 shows a process diagram with a possibility of bypassing the substrate feed around the aerobic treatment stage directly to the anaerobic treatment stage
  • FIG. 4 shows a process diagram with an intermediate clarification provided between the aerobic treatment stage and the anaerobic treatment stage
  • FIG. 5 shows a process diagram according to FIG. 4 with a further partial recycling of the substrate from the intermediate clarification to the aerobic treatment stage
  • FIG. 6 shows a process diagram similar to FIG. 5 but with a subsequent thickening and partial return of the substrate to the aerobic treatment stage
  • FIG. 7 shows a process diagram similar to FIG. 6, but with a partial return of the substrate from the anaerobic treatment stage to the intermediate clarification and from this to the aerobic treatment stage
  • -Fig. 8 shows a process diagram similar to FIG. 5, but with an upstream contact basin into which the partial return of the substrate takes place both from the anaerobic treatment stage and from the intermediate clarification and the aerobic treatment stage,
  • FIG. 9 shows a process diagram with an outer circular pool containing the aerobic treatment stage and an anerobic treatment pool containing the anaerobic treatment stage
  • FIG. 10 shows a process diagram similar to FIG. 9, with an outer circular pool in which a propeller generating a horizontal flow is mounted, and an inner circular pool of the anaerobic treatment stage formed from two different half-shells,
  • FIG. 11 shows a process diagram similar to FIG. 10, but with subsequent thickening and partial return of the substrate derived therefrom and
  • FIG. 12 shows a process diagram similar to FIG. 10, but with a covered inner circular pool and thus a closed anaerobic treatment stage.
  • the substrate supplied is first pre-thickened in the pre-thickening stage VD, from which the substrate reaches the aerobic treatment stage AE, in which the aerobic thermophilic sludge treatment stage zeß takes place, with aeration or oxygen fumigation is carried out and an automatic temperature increase occurs due to the biological process.
  • the aerobically accessible substances of the substrate are broken down and completely or partially broken down.
  • the substrate passes from the aerobic treatment stage AE to the anaerobic treatment stage AN, in which an anaerobic digestion process takes place with heating and with the formation of methane gas.
  • the anaerobically accessible substances of the substrate are broken down and broken down.
  • the anaerobic treatment stage AN plugs of the substrate that were not aerobically degradable are formed.
  • the substances subsequently formed in the anaerobic treatment stage AN are returned to the aerobic treatment stage AE, in which they can now be broken down, which results in a largely optimal utilization.
  • the substrate prepared in this way reaches a post-thickening stage ND, from which it is passed on in a known manner.
  • the substrate supplied is first passed into a contact basin. From here it goes to the aerobic treatment level AE and then to the anaerobic treatment level AN.
  • the return AF of the substrate from the anaerobic treatment stage AN takes place back into the contact basin KB.
  • the returned substrate is thoroughly mixed with the freshly added substrate. Any interfering influences of the methane bacteria of the aerobic treatment stage AN on the biology in the aerobic treatment stage AE can be prevented or eliminated.
  • a bypass UG is provided, which branches off before the aerobic treatment stage AE.
  • composition of the substrate supplied is such that if the substrate is fed directly into the aerobic treatment stage AE, the substrate degradation would be too great, and thus too little methane gas would be obtainable in the anaerobic treatment stage AN, there is the possibility in this embodiment of at least one Part of the substrate fed via the bypass UG directly to the anaerobic treatment stage AN, from which a return RF to the aerobic treatment stage AE is provided.
  • a zone clarification stage ZK is provided, which is located between the aerobic treatment stage AE and the anaerobic treatment stage AN.
  • the substrate supplied thus first reaches the * aerobic treatment stage AE and from there to the intermediate clarification stage ZK, from which a part can be derived to a clarification plant KA.
  • the substrate is passed from the intermediate clarification stage ZK to the anaerobic treatment stage AN.
  • the return of the substrate RF from the anaerobic treatment stage AN takes place again with the switching off of the intermediate clarification stage ZK directly into the aerobic treatment stage AE.
  • FIG. 6 shows that the substrate i supplied from the aerobic treatment stage AE via the intermediate clarification stage ZK and the anaerobic treatment stage AN reaches a post-thickening stage ND, from which, like the intermediate clarification stage ZK, waste water can be discharged to the sewage treatment plant KA .
  • the post-thickening stage ND the sewage sludge is led via an outlet to a sludge thickener SE.
  • the return RF of the substrate is branched off from the outlet of the post-thickening stage ND leading to the sludge thickening SE and leads to the aerobic treatment stage AE, into which a further return RF of the substrate from the intermediate clarification stage ZK also reaches.
  • the feedback RF takes place from the anaerobic treatment stage AN to the intermediate clarification stage ZK.
  • the return RF to the aerobic treatment stage AE continues from this intermediate clarification stage ZK.
  • the sewage sludge can be removed from the anaerobic treatment stage AN to the sludge thickening SE. It is also possible to discharge sewage sludge from the intermediate clarification stage ZK to the sludge thickening SE.
  • the post-thickening stage ND shown behind the anaerobic treatment stage AN can be omitted or can be made correspondingly small.
  • the return RF of the substrate from the anaerobic treatment stage AN takes place directly into the contact basin KB upstream of the aerobic treatment stage AE. Furthermore, the substrate RF is returned from the intermediate clarification stage ZK arranged between the aerobic treatment stage AE and the anaerobic treatment stage AN directly to the contact basin KB and a return RF is provided from the aerobic treatment stage AE to the contact basin KB.
  • the returns RF are optimally mixed with the supplied substrate, as a result of which a rapid reaction can be achieved due to the substrate being directly connected to the bacterial flakes.
  • an outer circular basin in which an inner circular basin is arranged coaxially.
  • the outer circular pool contains the aerobic treatment stage AE, while the anaerobic treatment stage AN is provided in the inner circular pool.
  • the substrate to be treated is entered in the aerobic treatment stage AE of the outer circular pool, in which a circular flow prevails. After the duration of the treatment in the aerobic treatment stage AE, the substrate is led into the inner circular pool to the anaerobic treatment stage AN, which also has a circular flow.
  • a return RF of the substrate for biological performance enhancement can be carried out from the inner anaerobic treatment stage AN to the outer aerobic treatment stage AE. Due to the circular system, thorough mixing with low flow losses and optimal reaction processes is achieved.
  • a propeller is provided in the outer circular pool of the aerobic treatment stage AE, which generates a circular flow.
  • the inner circular basin of the anaerobic treatment stage AN is limited compared to the aerobic treatment stage AE by two half-shell-shaped wall parts which have different radii, so that part of the flow from the aerobic treatment stage AE reaches the anaerobic treatment stage AN, whereby in the latter also a circular flow without additional drive is given.
  • the substrate passes from the aerobic treatment stage AE equally into the anaerobic treatment stage AN without additional pumps or the like.
  • the return of the substrate from the anaerobic treatment stage AN takes place on the opposite side without additional pumping power through a gap between the half-shell walls of the inner circular pool.
  • the treatment plant of FIG. 11 has for the aerobic treatment stage AE as in the previously described embodiment.
  • an external circular pool and for the anaerobic treatment level AN an internal circular pool limited by two different half-shells. No additional pump is required for the concentration, the concentration resulting in a reduction in the necessary total volume.
  • the sludge from the anaerobic treatment stage AN to the post-thickening stage ND is led from an outlet to the sludge dewatering SE. From this outlet there is a return RF of the substrate to the aerobic treatment stage AE or, according to the dashed line, to the anaerobic treatment stage AN of the inner circular pool. Excess water can be drained from the post-thickening stage ND into the sewage treatment plant KA.
  • the process diagram of FIG. 12 has an aerobic treatment stage AE in an external circular pool and also has an anaerobic treatment stage AN provided in an internal circular pool.
  • the anaerobic treatment stage AN is completely encapsulated and thus has a cover, not shown here, which can also extend over the entire pool unit to achieve a large gas space.
  • the substrate RF can be returned from the anaerobic treatment stage AN to the aerobic treatment stage AE by means of a corresponding shut-off.
  • the anaerobic treatment stage AN is blocked off correspondingly to the aerobic treatment stage AE both in the area of the degassing zone EZ and in the area of the exit of the return RF.
  • the wastewater treatment of the method according to the invention is particularly effective at elevated wastewater temperature, it can be expedient to carry out heat recirculation from the running substrate to the incoming substrate, as a result of which the waste heat is used economically. This results in a higher temperature level in the aerobic treatment and thus a higher output is also achieved, which of course also has a positive effect on the subsequent anaerobic treatment process, since here too the temperature level is inevitably higher and likewise results in a higher output.
  • AE aerobic treatment stage
  • AN anaerobic treatment stage
  • ZK intermediate clarification stage

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

Dans ce procédé de digestion biochimique de substances organiques, notamment pour le traitement des eaux usées, les eaux résiduaires respectivement les boues de décantation sont amenées d'une part à une étape de digestion en milieu aérobie et d'autre part à une étape de putréfaction en milieu anaérobie. En vue d'obtenir une exploitation biologique rentable respectivement une épuration poussée des substances résiduaires du substrat considéré, substances pouvant être soumises à une digestion en milieu aérobie et anaérobie, l'on procède à un recyclage au moins partiel du substrat à traiter du milieu anaérobie au milieu aérobie et/ou du milieu aérobie au milieu anaérobie.
EP19820902723 1981-09-03 1982-09-03 Procede de digestion biochimique de substances organiques Withdrawn EP0086818A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813134879 DE3134879A1 (de) 1981-09-03 1981-09-03 Verfahren zur biochemischen stoffumsetzung
DE3134879 1981-09-03

Publications (1)

Publication Number Publication Date
EP0086818A1 true EP0086818A1 (fr) 1983-08-31

Family

ID=6140770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820902723 Withdrawn EP0086818A1 (fr) 1981-09-03 1982-09-03 Procede de digestion biochimique de substances organiques

Country Status (5)

Country Link
EP (1) EP0086818A1 (fr)
JP (1) JPS58501366A (fr)
DE (1) DE3134879A1 (fr)
FI (1) FI831467A0 (fr)
WO (1) WO1983000856A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3602736A1 (de) * 1986-01-30 1987-08-06 Schreiber Berthold Verfahren und einrichtung zum biologischen abbau von phosphor aus abwasser
AT396684B (de) * 1991-08-06 1993-11-25 Norbert Dipl Ing Dr Te Matsche Belebtschlammverfahren zur reinigung von abwasser
AT397382B (de) * 1992-01-14 1994-03-25 Ingerle Kurt Dipl Ing Dr Techn Verfahren zur denitrifikation von abwasser
DE19645331A1 (de) * 1996-11-04 1998-05-07 Ct Umwelttechnik Gmbh Verfahren zur weitgehenden Stickstoffelimination in einer Abwasserreinigungsanlage

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875151A (en) * 1952-04-22 1959-02-24 Schenley Ind Inc Process for treatment of sewage
US3235487A (en) * 1963-02-04 1966-02-15 Fmc Corp Sewage treatment process
US3220945A (en) * 1963-03-01 1965-11-30 Wilbur N Torpey Method and apparatus for sewage treatment and disposal
CA968474A (en) * 1972-07-31 1975-05-27 David C. Climenhage Treatment of nitrogenous effluents
BR7800726A (pt) * 1977-02-08 1978-11-28 Union Carbide Corp Processo para a digestao de lama;e processo para remocao de bod de agua de rejeito em uma zona de aeracao coberta,e digestao da lama ativada com oxigenio gasoso
CA1098224A (fr) * 1977-05-19 1981-03-24 Paul F. Cooper Traduction non-disponible
DE2736565A1 (de) * 1977-08-13 1979-02-22 Schreiber August Verfahren zur mehrstufigen biologischen abwasserreinigung hochkonzentrierter abwaesser
DE2852544C2 (de) * 1978-12-05 1982-11-04 Menzel Gmbh & Co, 7000 Stuttgart Verfahren zum Stabilisieren und weitgehenden Hygienisieren von Abwasserschlamm aus Abwasserreinigungsanlagen
DE2913132A1 (de) * 1979-04-02 1980-10-09 Menzel Gmbh & Co Verfahren zur durchfuehrung und regelung von chemischen bzw. bio-chemischen prozessablaeufen in zwei oder mehreren hintereinandergeschalteten reaktionsstufen oder becken
DE2918950A1 (de) * 1979-05-10 1980-11-20 Linde Ag Verfahren und vorrichtung zur nitrifikation und denitrifikation von abwaessern
DE2945035A1 (de) * 1979-11-08 1981-05-27 Tecon Technische Beratungs-Gesellschaft mbH, 7140 Ludwigsburg Verfahren zur fremdenergieeinsparung und energiegewinnung in biologischen klaeranlagen und vorrichtung zur durchfuehrung des verfahrens

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8300856A1 *

Also Published As

Publication number Publication date
WO1983000856A1 (fr) 1983-03-17
DE3134879A1 (de) 1983-04-07
FI831467L (fi) 1983-04-29
JPS58501366A (ja) 1983-08-18
FI831467A0 (fi) 1983-04-29

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Inventor name: ZINK, JUERGEN