WO2006024372A1 - Utilisation d'emulsions huile dans l'eau dans des processus anaerobies - Google Patents

Utilisation d'emulsions huile dans l'eau dans des processus anaerobies Download PDF

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Publication number
WO2006024372A1
WO2006024372A1 PCT/EP2005/008639 EP2005008639W WO2006024372A1 WO 2006024372 A1 WO2006024372 A1 WO 2006024372A1 EP 2005008639 W EP2005008639 W EP 2005008639W WO 2006024372 A1 WO2006024372 A1 WO 2006024372A1
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WO
WIPO (PCT)
Prior art keywords
oil
water emulsions
component
fatty acid
saturated
Prior art date
Application number
PCT/EP2005/008639
Other languages
German (de)
English (en)
Inventor
Klaus Mielke
Norbert Konopka
Uwe Webers
Jörg Karp
Frank Friedrichs
Original Assignee
Stockhausen 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 Stockhausen Gmbh filed Critical Stockhausen Gmbh
Publication of WO2006024372A1 publication Critical patent/WO2006024372A1/fr

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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
    • C02F3/28—Anaerobic digestion processes

Definitions

  • the present invention relates to the use of oil-in-water emulsions to optimize anaerobic processes (digestion).
  • the sewage sludge resulting from the operation of the plants is in many respects a problem, not only because of the increased environmental awareness of the population and the stricter legal framework conditions.
  • the goal, which the operators want to achieve through the various sewage sludge stabilization processes, is therefore not only aimed at a reduction of odor-causing ingredients and organic sludge solids as far as possible, but also an improvement in dewaterability, the reduction of the amount of solids, the reduction of pathogens, increasing the security of disposal and the production of biogas in the anaerobic stabilization ,
  • economic terms in particular the reduction of Klär ⁇ mud volumes due to the high disposal costs, but also the extraction of biogas or biogas, which can be used for energy or eg for heating purposes, for the plant operators are of importance.
  • anaerobic digestion This is understood to mean the conversion of organic substances by microorganisms, which are also referred to as anaerobes, into low molecular weight compounds such as, for example, hydrogen, carbon dioxide, lower molecular acids, in particular acetic acid, alcohols, etc.
  • anaerobic degradation takes place, for example, in nature in the sludges or sediments of entropic waters as a natural consequence of the environmental conditions favoring this degradation.
  • anaerobic degradation is used specifically for the stabilization of sewage sludge or sludge and, in particular, for the purification of organically highly polluted effluents in order to substantially eliminate the organic impurities.
  • oil-in-water emulsions as an additive to accelerate anaerobic processes and / or to increase the degree of degradation in the same, as part of the oil phase at least one of the following a.) to f.) mentioned above alone or as a mixture of several components with each other, wherein Component a.) Is a saturated or mono- or polyunsaturated, an unbranched or branched, an open-chain or a cyclic hydrocarbon having 8 to 30 hydrocarbon atoms,
  • Component b.) Is a saturated or mono- or polyunsaturated fatty alcohol, a saturated or mono- or polyunsaturated fatty acid, a fatty acid monoalkyl ester, a fatty acid amide or a fatty acid monoalkylamide of a saturated or mono- or polyunsaturated fatty acid, where the fatty alcohols fatty acids, fatty acid esters and fatty acid amides of the abovementioned compounds have 8 to 30 hydrocarbon atoms,
  • Component c.) A mono- or polyesters of a saturated or unsaturated dicarboxylic acid having 4 to 30 hydrocarbon atoms and a monoalcohol and / or a polyol, excluding polyethylene glycols or a mono- or polyesters of a saturated or unsaturated fatty acid having 8 to 30 hydrocarbon atoms and polyols excluding polyethylene glycols,
  • Component d. Is a polyamide of saturated or mono- or polyunsaturated fatty acids having 8 to 30 hydrocarbon atoms and aliphatic polyamines having 2 to 6 nitrogen atoms,
  • Component e.) Is an acyclic, monocyclic, bicyclic terpene and / or a terpene alcohol
  • oil-in-water emulsions for example, in wastewater and sludge treatment, ore and coal preparation and papermaking has been described many times.
  • oil-in-water emulsions are used in the paper industry for reducing or detaching biological slime and for controlling sticky organic contaminants, the use of which in principle also results in improved system purification.
  • DE 43 40 665 which describes such oil-in-water emulsions for preventing slime formation and reducing microbial growth in water-bearing systems such as the paper production, in sugar extraction, in water-based drilling fluids, in cooling and heating circuits or generally in service or sewage systems describes.
  • it is known from DE 198 59 054 that such oil-in-water emulsions can be used to reduce the air and / or oxygen requirement of aerobic, biological sewage treatment plants.
  • the preparation of the oil-in-water emulsions according to the invention is known from DE 198 59 054 and DE 43 40 665 and takes place in such a way that the oil component is emulsified in water by means of suitable known oil-in-water emulsifiers , wherein the hydrophobic phase of the emulsion predominantly represents the active ingredient.
  • suitable known oil-in-water emulsifiers wherein the hydrophobic phase of the emulsion predominantly represents the active ingredient.
  • the oil-in-water emulsions to be used according to the invention may be used as component a.
  • Saturated hydrocarbons such as e.g. Octane, tetradecane, octadecane, Eisodecan, mono- or polyunsaturated Kohlenwas ⁇ serstoffe, especially decene, hexadecene and technical ⁇ -olefins.
  • commercially available hydrocarbons and hydrocarbon mixtures are suitable as component a.
  • saturated or mono- or polyunsaturated hydrocarbons it is also possible to use fats and oils on a native basis, wherein vegetable oils, preferably rapeseed oil, are particularly preferred.
  • the oil-in-water emulsions contain as component b.) Fatty alcohols, such as, for example, octanol, dodecanol, tridecanol, octadecanol and / or behenyl alcohol. hol.
  • Fatty alcohols such as, for example, octanol, dodecanol, tridecanol, octadecanol and / or behenyl alcohol. hol.
  • saturated or unsaturated fatty alcohols which can be used according to the invention as E mulsionskomponente are available by known methods, such as oxo synthesis as oxo alcohols or after the Guerbet reaction as Guerbet alcohols.
  • capric, stearic, melissic, oleic and linolenic acids may be cited as the fatty acid esters, stearylic acid palmitate, octadecyl octanoate, octyl oxyacetate, glycerol mono- and trioleate, ethylene glycol dilaurate, sorbitan stearates and oleates, and exemplified.
  • Fatty acid amides of the component may be, for example, stearylamide, coconut fatty acid butylamide, acetic acid oleylamide and / or ethylenebisstearylamide.
  • Mono- or polyesters of a saturated or unsaturated dicarboxylic acid having 4 to 30 hydrocarbon atoms and a monoalcohol and / or a polyol except polyethylene glycols such as dibutyl adipate or mono- or polyesters of a saturated or unsaturated fatty acid having 8 to 30 hydrocarbon atoms and polyols, Polyethylene glycols may be used as component c.), fatty acids being, for example, capric acid, stearic acid, melissic acid, oleic acid and linolenic acid.
  • the oil-in-water emulsions according to the invention contain as component e.) Terpenes, such as, for example, Menthol or orange terpenes, which can be obtained as a commercial product from the companyshowmer Baltic HG, Hamburg.
  • Terpenes such as, for example, Menthol or orange terpenes, which can be obtained as a commercial product from the companyshowmer Baltic HG, Hamburg.
  • polyoxyalkylene on the basis of Alkyleno- xiden, fatty alcohol, C 12 -i8 - fatty acids and / or fatty acid glycerides of C
  • Such compounds may acids fat, for example, be used oxide, the polyethylene and / or polypropylene included - 2 i8.
  • the proportion of the oil phase in the oil-in-water emulsion is 1 to 90% by weight, preferably 1 to 50% by weight and more preferably 5 to 30% by weight of the total emulsion.
  • the oil-in-water emulsions in the oil phase necessarily contain the component e.) As a component of the oil phase, which may then optionally be mixed with other components.
  • the oil-in-water emulsions to be used according to the invention as such or in dilution with water or water and / or solvent-containing mixtures, are added as an additive to the sewage sludge which is to be subjected to an anaerobic degradation process.
  • the addition of the emulsion to be used according to the invention is preferably carried out continuously in the feed to the foul stream charge, so that during the anaerobic degradation process in the digester, in particular in the temperature range around 37 ° C., ie in the temperature range in which mesophilic microorganisms have their growth optimum, a constant dosage is available.
  • the amount added here is at least 1 to 1000 ppm, preferably at least 2 to 200 ppm and particularly preferably at least 4 to 50 ppm, based on the amount of the anaerobically degradable sewage sludge.
  • anaerobic digestion is the most important and widely used method of sewage sludge stabilization in the European Union. This not only improves the sludge properties in terms of stability with respect to biodegradation processes, odor, dewatering, etc., but at the same time the valuable material carbon obtained in the anaerobic digestion process can be used in the form of digested or biogas the, which reduces the further disposal feeding Schlammenge.
  • anaerobic degradation processes are not only accelerated or the degree of degradation increased in these processes, but also an increased amount of digested or biogas is achieved.
  • the inventive use of the oil-in-water emulsions in the anaerobic Ab ⁇ construction advantageously causes a greater reduction of solids (TR content) in the sewage sludge and it is a higher mineralization. Due to this increased reduction of the organic content in the sludge, an improved drainage behavior of the sludge is also achieved. Moreover, the use according to the invention of the oil-in-water emulsions achieves a hydraulic relief of the septic tanks. In the following the invention will be explained by way of examples. These explanations are merely exemplary and do not limit the general inventive concept.
  • the samples to be treated were installed in a test reactor and left in the reactor for a specified treatment time (22 days) without supplying further quantities of sample material.
  • the reactor was subject to a me- sophilen operation at a constant temperature of 37 0 C.
  • the biogas collection was carried out by means of collecting cylinder with shut-off valve.
  • sludge was used, which is obtained after the anaerobic treatment in the digesters of the wastewater treatment plant Bottrop (Germany).
  • the sewage sludge had a TR content of 3.2%.
  • the oil-in-water emulsions according to the invention were added in different concentrations to the individual batch batches and their effect during anaerobic degradation was investigated.
  • a commercial product of the company Stockhau ⁇ sen GmbH, Krefeld (Germany), namely the product Polystabil.RTM. OF whose TR content was used with 7.9% (oily residue) or by weight was used as an oil-in-water emulsion according to the invention the GM was determined to be 100%.
  • the product had a COD of 430,000 mg / l.
  • the degree of degradation of pure sewage sludge digestion was approx. 4%. This low value is attributable to the fact that this was sludge from a digester that was already subject to an anaerobic pre-mining in a fermenter at the wastewater treatment plant in Bottrop.
  • the parameters degree of degradation of the organic substance, content of volatile organic acids and specific gas yield are decisive (Kapp, H., Bahrs, D., Dichtl, N., Englmann , E., Köhlhoff, D., Siekmann, K. - Stabilizing Characteristics for Biological Stabilization Methods, Working Report of the ATV / BDE / VKS - Working Group 3.1.1 (1993)).
  • the degree of degradation and the specific gas yield depend not only on the conditions of the anaerobic process but also on the composition of the sludge. Therefore, the content of organic acids is the currently recognized best criterion for the evaluation of the degradation process, which is characterized as follows:
  • Figure 3 shows the contents of the fatty acids determined before and after the batch experiment in each batch. All lines have fatty acid equivalents of ⁇ 100 mg / l after the digestion process, ie they are a very well digested, ie fully stabilized sludge.

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  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)

Abstract

La présente invention concerne l'utilisation d'émulsions huile dans l'eau en tant que substance d'addition permettant d'accélérer des processus anaérobies et/ou d'augmenter le degré de dégradation dans ceux-ci. Comme composantes de la phase huileuse peuvent être utilisés des hydrocarbures, des alcools gras, des acides gras, des monoalkylesters d'acide gras, des amides d'acide gras, des monoalkylamides d'acide gras, des mono- ou polyesters, des polyamides, des terpènes et/ou des composés de polyoxyalkylène.
PCT/EP2005/008639 2004-08-27 2005-08-09 Utilisation d'emulsions huile dans l'eau dans des processus anaerobies WO2006024372A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410041848 DE102004041848A1 (de) 2004-08-27 2004-08-27 Verwendung von Öl-in-Wasser Emulsionen in anaeroben Prozessen
DE102004041848.9 2004-08-27

Publications (1)

Publication Number Publication Date
WO2006024372A1 true WO2006024372A1 (fr) 2006-03-09

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Application Number Title Priority Date Filing Date
PCT/EP2005/008639 WO2006024372A1 (fr) 2004-08-27 2005-08-09 Utilisation d'emulsions huile dans l'eau dans des processus anaerobies

Country Status (2)

Country Link
DE (1) DE102004041848A1 (fr)
WO (1) WO2006024372A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6242800A (ja) * 1985-08-20 1987-02-24 Iwao Ueda 余剰汚泥の処理装置
EP0820970A2 (fr) * 1996-06-25 1998-01-28 MARCOPOLO ENGINEERING S.r.l. Procédé et méthodologie de production d'un complex biologique nutritive-synergique, à bio-activateur de l'activité microbiologique dans des matériaux organiques et organochimiques
US20020166813A1 (en) * 2001-05-14 2002-11-14 Bartlett Robert W. In situ anaerobic bioremediation of earth and sold waste contaminants using organic/water emulsions
CA2426216A1 (fr) * 2002-08-27 2003-10-14 William A. Newman Substrats et methode d'assainissement anaerobique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6242800A (ja) * 1985-08-20 1987-02-24 Iwao Ueda 余剰汚泥の処理装置
EP0820970A2 (fr) * 1996-06-25 1998-01-28 MARCOPOLO ENGINEERING S.r.l. Procédé et méthodologie de production d'un complex biologique nutritive-synergique, à bio-activateur de l'activité microbiologique dans des matériaux organiques et organochimiques
US20020166813A1 (en) * 2001-05-14 2002-11-14 Bartlett Robert W. In situ anaerobic bioremediation of earth and sold waste contaminants using organic/water emulsions
CA2426216A1 (fr) * 2002-08-27 2003-10-14 William A. Newman Substrats et methode d'assainissement anaerobique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 011, no. 229 (C - 436) 25 July 1987 (1987-07-25) *

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