WO1992011206A1 - Procede et installation d'epuration des liquides uses d'origine agricole - Google Patents

Procede et installation d'epuration des liquides uses d'origine agricole Download PDF

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Publication number
WO1992011206A1
WO1992011206A1 PCT/NO1991/000156 NO9100156W WO9211206A1 WO 1992011206 A1 WO1992011206 A1 WO 1992011206A1 NO 9100156 W NO9100156 W NO 9100156W WO 9211206 A1 WO9211206 A1 WO 9211206A1
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WO
WIPO (PCT)
Prior art keywords
plant
pipe
alpechin
water
chitosan
Prior art date
Application number
PCT/NO1991/000156
Other languages
English (en)
Inventor
Carl-Henrik Knudsen
Stein-Thore Larsen
Original Assignee
Ticon Vvs A/S
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
Priority claimed from NO905473A external-priority patent/NO905473D0/no
Application filed by Ticon Vvs A/S filed Critical Ticon Vvs A/S
Publication of WO1992011206A1 publication Critical patent/WO1992011206A1/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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K10/00—Animal feeding-stuffs
    • A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
    • A23K10/37—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms from waste material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5281—Installations for water purification using chemical agents
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F11/00—Other organic fertilisers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
    • C02F2103/322—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters from vegetable oil production, e.g. olive oil production
    • 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
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
    • Y02P60/87—Re-use of by-products of food processing for fodder production

Definitions

  • the present invention concerns a process for purifying waste material from agriculture, especially pressed fruit waste material and more especially waste from olives (alpechin) , and a plant being suited for performing the process according to the invention.
  • a purpose with the present invention is thus to produce a process for purifying the aqueous phase from fruit waste material and to obtain a plant which may be used for such a purification.
  • Such substances may comprise a number of inorganic and organic compounds such as colouring materials, proteins and sugars.
  • fruit waste material has a too solid consistency there is initially added water thereto.
  • Fruit waste material and water is then separated by known methods such as centrifuga ion, filtering and/or decantation.
  • the separating process may also optionally include heating of the aqueous phase, e.g. to 35-80°C, preferably to 35-50'C.
  • the aqueous phase will contain water-soluble organic compounds, proteins, sugars and organic and inorganic salts.
  • the inorganic components comprise nutritional salts from the fruit and salts from the water with which the fruit was mixed before the milling in the first step.
  • Chitosan is a biopolymer which has in the above mentioned aqueous system surprisingly been shown to precipitate and flocculate the dissolved and hovering organic materials and salts in the aqueous solution from the initial purifying step mentioned above.
  • the organic components will eventually be removed from the waste water, which then may be used as such for e.g. an addition to the dilution in the first purification step of the purification process or it may be led back to nature as purified water via irrigation pipes or directly to water courses etc.
  • the number of purification steps being necessary to remove the organic components may be easily determined by using standard methods being known to the person skilled in the art and which may be performed on the waste water from each and any of the purification steps in the process.
  • Fig. 1 shows a principle sketch of the purification plant according to the invention.
  • Fig. 2 shows an embodiment of the purification plant according to the invention where the location and sequence of each of the step components have been indicated.
  • Fig. 3 shows a plane view of a purification plant based on the principle sketch according to Fig. 1 and 2 as well as a sectional view of some parts of the plant.
  • Fig. 4 Shows the location of a purification plant according to fig. 3 in a purification station.
  • Fig. 5 shows an embodiment of a pipe flocculator being suited for flocculation with chitosan in the plant according to the invention.
  • Fig. 6 shows a mixing device for the compounds with the liquid for treatment according to the invention.
  • Fig. 7 shows the purification effect of each step in the purification process and -plant according to the invention.
  • Fig. 8 shows schematically some fields of use for the end products subsequent to the purification process according to the invention.
  • the starting material for the processing according to the invention is present.
  • suitable quantities of water for flushing/- dilution of the aqueous phase of the starting material and washing out of the solid material remaining after the pre- treatment
  • TOC Total Organic Carbon
  • BOC Bio ⁇ logical Oxygen Consume
  • An alternate measurement for the water-soluble material in the aqueous phase is the COC (Chemical Oxygen Consume)-value which may lie below 90.000 mg/1, e.g. in the interval 90- 60.000 mg/1.
  • An alternative starting material for removing organic material according to the invention may also be silo liquid which may be diluted as mentioned above as well or be used directly in the purification process.
  • waste material contains solid particles it is subjected to centrifugation to remove the solid material (fruit meat, water-insoluble fibre material, fruit skins, cores, kernels etc.) and this solid material will be free from water-soluble components since these will have become flushed out in the initial washing step. If necessary there may be performed several water additions/sentrifugations to wash out the starting material.
  • sentrifugation instead of sentrifugation other methods for removing particulate materials may be used such as e.g. filtering, precipitation and/or flotation, as mentioned above.
  • the aqueous phase from this initial separation step comprise the raw material for further processing by the purification method according to the invention.
  • This liquid, below specified as the waste water, is treated in several consecutive purification steps, as explained below with reference to figs. 1-4 which show an example of a plant which may be used for performing the purification method according to the invention.
  • the waste water is pumped to an inlet tank 1 shown in fig. 1-4.
  • the TOC-, BOC- or COC-values are subsequently adjusted to suitable levels as mentioned above and additionally the pH is optionally adjusted to a suitable value for precipitation with chitosan, e.g. within the pH-interval 5,5-7,0, preferably pH 6,5.
  • the waste water is pumped via mixing devices 12 for mixing in chitosan, e.g. such mixing devices as shown in fig. 6, to a device for flocculation 2, e.g. a pipe flocculator as shown in fig. 5.
  • mixing devices 12 for mixing in chitosan e.g. such mixing devices as shown in fig. 6, to a device for flocculation 2, e.g. a pipe flocculator as shown in fig. 5.
  • chitosan is admixed to the waste water in an amount of 100-200 g/m 3 water and is then led into the flocculator 2.
  • the amount of waste water added to the plant is measured with a water-measuring device, e.g. of electromagnetic type, for not overloading the capacity of the plant and to maintain a continuous purification process.
  • a water-measuring device e.g. of electromagnetic type
  • the water is passed to a precipi ⁇ tation tank/flotation unit 3, and during this period there is added calcium in an mount of up to 200 g/m 3 as well as optionally additional adjuvants for flocculation and to aggregate the flakes which have been produced with chitosan to larger and more solid flakes.
  • adjuvants may e.g. be organic polymer materials such as "Prastol” and/or "Zetag” which may be added in an amount of 50-100 g/m 3 .
  • Other adjuvants may also be added to the waste water together with the chitosan in the same amounts as for the pipe flocculator 2.
  • calcium in the flocculating steps may be performed with suitable water-soluble calcium salts such as calcium hypochlorite.
  • suitable water-soluble calcium salts such as calcium hypochlorite.
  • Other calcium salts such as calcium nitrate may also be used and the choice thereof will lie within the competence of the person skilled in the art.
  • the waste water is conducted further to the contact filters 5 where there may be added additional calcium in a quantity of about 50-100 g/m 3 and where residual flakes are filtered from the waste water. As shown in fig. 7 the TOC and BOC values after this step are significantly reduced.
  • the olive fruit is mixed with water in the weight ratio 1:1 - 1:2 and is ground to a pulp which is heated to 40-50 ° C .
  • the solid material is separated from the mass either by pressing (old process) or by centrifuging (modern process) and is passed to the separator to remove the olive oil.
  • the aqueous phase from this process is called "alpechin" in Spain, it has a strong brown colour and contains a number of organic and inorganic materials.
  • the organic part comprises mainly proteins and sugars.
  • the inorganic components comprise nutritional salts from the fruit and salts from the water with which the fruit was mixed before the grinding.
  • Components in water which, in the instance of alpechin, it is possible to separate are present suspended in the aqueous phase in colloidal form.
  • the suspension is stable based on the surface charge of the particles.
  • the principle for the present purification method is that there to the aqueous phase is added a material (chitosan) which neutralizes the charge on the surface of the particles so that they coalesce (flocculate) into larger units (aggregates) and may thus be separated from the water.
  • Aluminum sulphate did thus not prove to be any suitable flocculation and coagulation material for the same reasons as is indicated for iron chloride.
  • organic coagulation materials there are many different types and depending on the properties which are necessary for such materials there is made a distinction between anionic, cationic and nonionic agents.
  • the coagulation agent for alpechin must have cationic properties on account of the charge on the surface of the colloid particles, it must also have non-toxic and non-polluting properties to be used later as inter alia feed for animals or fertilizer.
  • Chitosan which is a form of deacylated chitin and which formerly has been used in photographic emulsions, is very well suited for precipitation, coagulation and flocculation of alpechin.
  • Chitosan is further a product of chitin which is a natural product, is suited for feed or fertilizer on account of its nutritional value and has additionally adsorbing properties for e ulgated oil.
  • Table 2 The potassium content in alpechin.
  • the analysis shows a relatively constant level for the potassium content of about 4 g/1.
  • the oil content in alpechin was determined by extraction with tetrachloromethane (CC1 4 ) . After evaporation of the tetrachloromethane the oil residues were weighed. In a sample of alpechine from a lagoon to the mills of Alcala la Real the oil content was determined to 0,018%. The result shows that the oil content was very low. The sample must accordingly have been taken just below the surface of the lagoon.
  • the copper content in alpechin from a mill in Alcala la Real was determined to be 0,36 mg Cu/1.
  • copper is present in monovalent form as crystals of copper oxide (cuprite CU2O) .
  • Cuprite is insoluble in water and has a red colour. The red colour which may be observed on the surface of alpechinlagoons may be caused by cuprite.
  • Cuprite is present as indicated in the form of crystals and may be enriched in the sludge in the bottom of the lagoon. If this sludge is used as fertilizer it may poison the soil.
  • the dry matter content of alpechin is determined to be about 50-60 g/1.
  • the copper content of alpechin was determined to about 0,36 mg/1, this corresponds to a copper content in the dry matter of about 6 mg/kg.
  • the copper content was determined to be 67 mg/kg, i.e. about 10 times higher than in alpechin from a lagoon where most of the sludge had sedimented. This confirms that the copper is present in crystalline form and is enriched in the bottom sludge.
  • Copper is an important trace metal, but is toxic in high concentrations. Microorganisms and lower vegetation has a lower tolerance for copper, whereas animals and higher vegetation have higher tolerance limits. Since alpechin may be contemplated as an animal feed material, there will below be given some tolerance limits and necessary intake of copper.
  • One single dose of one gram is deadly for poultry.
  • the required daily dose of copper is considered to be 0,5 g CuS0 4 per 100 kg body weight, while a 10 times larger quantity is toxic.
  • the copper content should not exceed 8 mg/kg in the feed daily.
  • the required copper content in the feed is 6 mg/kg.
  • Feed material has a content of solids of about 10%. As a ready to use feed from alpechin the copper contents should accordingly be 6,7 mg/1.
  • the aqueous phase that is exited from the last step in the purification process according to the invention will not contain any copper.
  • silicate as a precipitation agent will result in the forming of a gel representing a significant problem at a subsequent filtering of the aqueous phase after the flocculation step.
  • chitosan gives no such gel formation and it has accordingly been performed tests with a subsequent treatment in the tube flocculator 2.
  • Membrane filtration There has been performed extensive laboratory tests with membrane filtering and alpechin with different membrane types and varying operating pressures (15-60 bars) .
  • the ideal membrane for purification/concenration of waste water from the olive oil production should be able to concentrate organic compounds while the mineral materials are passed through and remain in the clear permeate. Is preferred to remove a significant part of the organic material without simultaneously removing minerals.
  • One example of the pipe dimensions in the shown purifi ⁇ cation plant according to the invention may be 20,3 cm (8") in diameter, and by combining couplings in parallel and series of the pressurized pipes, the plant may be operated flexibly and may have an operating capacity for a supplied amount of liquid in the area of 1-9 m 3 /hour. A part of the concentrate material may be recirculated in the plant.
  • the pump chamber 1 for supplied alpechin may have a surface area of 1,3 m 3 with a centrifugal pump a with a capacity of 6,0 m 3 /hour.
  • a tube flocculator 2 as shown in fig. 5, where the structure is spiral-formed with both an inlet and an outlet at the bottom of the spiral body.
  • the flocculator 2 may of course also have another configuration and ought to be able to have an operating pressure in the pipes.
  • a flotaion unit 3 in the case of purification of alpechin, where the said flotation unit may be constructed with an area of 3,7 m 2 .
  • the alpechin is led to a contact filter-pumping chamber 4 and 5 with a centrifugal filter-pump c and a flushing pump d with a capacity of 22 m 3 /hour and 190 m 3 /hour, respectively.
  • the liquid is pumped to a contactfilter 5 comprising a continuous upstream filter with an area of 2,25 m 2 and a surface load at 22 m 3 /hour of 10 m/hour.
  • the filtered liquid is passed back to the re- circulation chamber 4 and sludge from the filtering is passed to a sludge tank 6.
  • a further membrane filter unit 7 with a filtering pressure of 40-60 bars and comprising as an example 4 units ⁇ 200 pressure pipes with 2 spiral elements in each pipe.
  • the pipes may be combined via a connection in parallel or series.
  • the total filtration surface may in this instance be 260 m 2 .
  • the pressure inside this membrane filtration unit 7 may be produced by using a pump f.
  • From the filtration unit 7 liquid may be exited via an exit chamber 8, optionally containing a filter with active coal e.g. with a surface area of 1,3 m 2 , where the surface load nay be adjusted to less than 3,2 m/hour.
  • Addition of chemicals in each step where there is required addition of either chitosan, calcium, flocculation adjuvants etc. may be performed via reservoirs for chemicals 11 being guided by separate pumps and which also may be guided automatically via an electronic guiding unit for the process.
  • a structure for such mixing units is shown in fig. 6.
  • the plant shown in figs. 1-4 may preferably be made fully automatican be guided by using a control panel with PLS. Important operating and measurement data are transferred to a control panel, and the signals are transferred to datalogs for storage and processing. The amount, pH, pressure amd temperature for the waste water is measured and registered continuously.
  • the above indicated example is given for treatment of alpechin, but nothing prevents that the same purification process and the same considerations are taken as a basis for purification of any type of waste material from agriculture and growth/treatment of fruit.
  • the process according to the invention is in this case excellently suited for reducing the amount of proteins and the amount of organic material in the aqueous phase from such flushed waste material which has been mentioned initially.
  • a suitable form of the tube flocculator in the plant according to the invention may work under pressure and is constructed from a spiral-shaped tube with internal baffle plates for increasing the internal surface area and to create a longer flow distance in the floccu ⁇ lator.
  • the baffle plates may be provided with penetrating apertures to increase the mixing effect between the flocculation agent and the waste water to create flakes.
  • Inlet and outlet in the flocculator is preferably arranged in the same part of the flocculator, in which case the spiral tube forming the flocculator is wound back in a double helix so that inlet and outlet exist at the same end of the flocculator. This is, however, not a necessary feature of the flocculator.
  • a suitable form for the static mixing units 12 which may be used in the plant according to the invention is shown in fig. 6 and comprises a mixing chamber I containing a dual inner chamber with a funnel-shaped configuration and where the narrow part II of the funnel has a circumferentially spaced number of nozzles III, preferably 8 nozzles. Adjacent to the mixing chamber's funnel-shaped penetrating aperture there is situated at least one side-pipe IV in the outer chamber V of the mixing chamber I, through which side pipe IV there may be added the required chemicals. The fluid to which the chemicals are to be added is passed through the funnel-shaped aperture and will achieve an advantageous mixing of added chemicals when passing the funnel-shaped aperture of the funnel-shaped section and the nozzles III.
  • the mixing device has itself a pipe-formed cross-section and may optionally also be equipped with internal spiral-formed grooves or ridges which will produce a vortex in the main fluid before it flows out of the narrowing part II of the funnel-section for further to enhance the mixing effect downstream from the mixing device.
  • the flow direction through the mixing unit is indicated with an arrow.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Polymers & Plastics (AREA)
  • Biotechnology (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Botany (AREA)
  • Molecular Biology (AREA)
  • Mycology (AREA)
  • Physiology (AREA)
  • Animal Husbandry (AREA)
  • Zoology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Food Science & Technology (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

Procécé et installation d'épuration des liquides usés d'origine agricole tels que les liquides restants après le traitement des fruits. Dans un premier temps, on sépare les liquides usés en un solide et une phase hydrosoluble, et l'on ajoute à la phase aqueuse du chitosan pour provoquer la floculation des particules flottant de manière colloïdale dans la phase aqueuse. On fait passer la phase aqueuse ainsi traitée dans un floculant tubulaire (2), l'on ajoute du chitosan supplémentaire (4, 5, 12), et l'on filtre ladite phase aqueuse à l'aide de filtres à diaphragme (5) et de filtres à charbon (7) et inversement. Le procédé et l'installation sont adaptés à l'épuration de l'alpéchine, c'est-à-dire le liquide résiduraire du pressage de l'huile d'olive.
PCT/NO1991/000156 1990-12-19 1991-12-19 Procede et installation d'epuration des liquides uses d'origine agricole WO1992011206A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NO905473A NO905473D0 (no) 1990-12-19 1990-12-19 Behandlingsanlegg for alpechin.
NO905473 1990-12-19
NO912460 1991-06-24
NO912460A NO912460D0 (no) 1990-12-19 1991-06-24 Fremgangsmaate og behandlingsanlegg ved behandling av vandig avfall fra jordbruket.

Publications (1)

Publication Number Publication Date
WO1992011206A1 true WO1992011206A1 (fr) 1992-07-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1991/000156 WO1992011206A1 (fr) 1990-12-19 1991-12-19 Procede et installation d'epuration des liquides uses d'origine agricole

Country Status (2)

Country Link
NO (1) NO912460D0 (fr)
WO (1) WO1992011206A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2067423A1 (es) * 1993-09-02 1995-03-16 Novamak S L Estacion automatica para las depuraciones de purin, residuos oleicolas y aguas residuales.
GB2284205A (en) * 1993-11-25 1995-05-31 Nalco Ltd Treatment of agricultural waste
FR2715590A1 (fr) * 1994-02-01 1995-08-04 Rhone Poulenc Chimie Procédé d'épuration d'un milieu contenant des déchets organiques.
FR2724922A1 (fr) * 1994-09-28 1996-03-29 Rhone Poulenc Chimie Procede et installation d'epuration d'un milieu liquide contenant des dechets organiques
ES2088749A1 (es) * 1995-01-13 1996-08-16 Mulet Pitarch Dionisio M Instalacion depuradora de residuos porcinos y similares.
EP0718397A3 (fr) * 1994-09-13 1997-05-07 Tratamiento Integral De Alpech Procédé pour la purification et développement d'un produit de déchet liquide et solide provenant d'installations d'huilerie
WO1997028089A1 (fr) * 1996-01-31 1997-08-07 Dianellos Georgoudis Procede d'extraction de pate d'olive a partir de jus vegetaux et son utilisation en tant que produit alimentaire
ES2162738A1 (es) * 1997-06-25 2002-01-01 Martinez Francisco Jesus Ratia Fertilizante para suelos liquido a base de alpechin o jamila.
EP1598316A2 (fr) * 2004-05-18 2005-11-23 Stefan Ing. Fröschl Dispositif de purification de l'eau
ES2259870A1 (es) * 2004-04-05 2006-10-16 Treico Medio Ambiente, S.L. Procedimiento para la depuracion de las aguas residuales producidas en las almazaras, molinos de aceite y productoras de aceitunas de aderezo.
AT501991A1 (de) * 2005-06-10 2006-12-15 Adler Herwig Dipl Ing Verfahren zur behandlung von abwasser aus der olivenölproduktion
US7387802B2 (en) * 1998-09-24 2008-06-17 Malaysian Palm Oil Board Treatment of vegetation liquors derived from oil-bearing fruit
US8075783B2 (en) * 2007-07-31 2011-12-13 Aquafiber Technologies Corp. Water remediation and biosolids collection system and associated methods
EP2514722A1 (fr) 2011-04-19 2012-10-24 Spechim S.A. Installation, composition et procédé pour le traitement de déchets produits par des moulins à huile
CN107188263A (zh) * 2017-07-19 2017-09-22 金寨益企学农业科技有限公司 一种稻田废水排放装置

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CH535185A (de) * 1969-06-02 1973-03-31 Hefermehl Sa H P Verfahren zum kontinuierlichen Reinigen von suspendierte Feststoffe enthaltenden Abwässern sowie Anlage zur Ausführung des Verfahrens
SE430595B (sv) * 1974-10-10 1983-11-28 Clevepak Corp Forfarande och kontaktkammarapparat av ejektortyp for desinficering av strommande kloakvatten
GB2035285A (en) * 1978-11-20 1980-06-18 Ct Tech Komunal Method and apparatus for treating water and other liquids

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CHEMICAL ABSTRACTS, Volume 82, No. 18, 5 May 1975, (Columbus, Ohio, US), BOUGH, WAYNE A.: "Reduction of suspended solids in vegetable canning waste effluents by coagulation with chitosan", see page 262, abstract 115733b; & J. FOOD SCI. 1975, 40(2), 297-301. *
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Cited By (23)

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