NL2015253B1 - Organic liquid having high nitrate content for use in the organic cultivation of plants. - Google Patents

Organic liquid having high nitrate content for use in the organic cultivation of plants. Download PDF

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Publication number
NL2015253B1
NL2015253B1 NL2015253A NL2015253A NL2015253B1 NL 2015253 B1 NL2015253 B1 NL 2015253B1 NL 2015253 A NL2015253 A NL 2015253A NL 2015253 A NL2015253 A NL 2015253A NL 2015253 B1 NL2015253 B1 NL 2015253B1
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Netherlands
Prior art keywords
organic
plants
substrate
nitrate content
mmol
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NL2015253A
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Dutch (nl)
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NL2015253A (en
Inventor
Wilhelmus Maria De Bruijn Carolus
Cornelis 't Hoen Bartholomeus
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Van Der Knaap Diensten B V
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Application filed by Van Der Knaap Diensten B V filed Critical Van Der Knaap Diensten B V
Priority to NL2015253A priority Critical patent/NL2015253B1/en
Priority to US15/748,605 priority patent/US20190002360A1/en
Priority to CA2994400A priority patent/CA2994400A1/en
Priority to EP16745756.3A priority patent/EP3332015A1/en
Priority to PCT/EP2016/068446 priority patent/WO2017021415A1/en
Priority to MX2018001376A priority patent/MX2018001376A/en
Publication of NL2015253A publication Critical patent/NL2015253A/en
Application granted granted Critical
Publication of NL2015253B1 publication Critical patent/NL2015253B1/en

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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F1/00—Fertilisers made from animal corpses, or parts thereof
    • 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
    • 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
    • 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
    • C05F17/40—Treatment of liquids or slurries
    • 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
    • C05F17/50—Treatments combining two or more different biological or biochemical treatments, e.g. anaerobic and aerobic treatment or vermicomposting and aerobic treatment
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F5/00—Fertilisers from distillery wastes, molasses, vinasses, sugar plant or similar wastes or residues, e.g. from waste originating from industrial processing of raw material of agricultural origin or derived products thereof
    • 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
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P3/00—Preparation of elements or inorganic compounds except carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • 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

Abstract

The present invention relates to a method for producing an organic liquid having a high nitrate content. The organic liquid having a high nitrate content can be used as, or as part of, organic plant nutrition. The present invention therefore also relates to organic plant nutrition having a high nitrate content. The present invention further relates to the use of an organic liquid having a high nitrate content for organically cultivating plants on a substrate, and to a method for organically cultivating plants on a substrate comprising adding an organic liquid having a high nitrate content to the substrate.

Description

ORGANIC LIQUID HAVING HIGH NITRATE CONTENT FOR USE IN THE ORGANIC
CULTIVATION OF PLANTS
The present invention relates to the cultivation of plants on a substrate, and in particular to the organic cultivation of plants on a substrate.
Plants require several nutrients to grow, such as nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), sulphur (S), magnesium (Mg), boron (B), chlorine (Cl), manganese (Mn), iron (Fe), zinc (Zn), copper (Cu), and molybdenum (Mo). The nitrogen as present in the atmosphere and as proteins and/or amino acids in plant and animal matter is, however, not available to plants. For nitrogen to be available for uptake by plants it needs to be present in the form of ammonium (NH4+), nitrate (N03 ) or urea (NH2). Microorganisms, such as fungi and bacteria present in the soil, can convert proteins and amino acids into nitrate, as is shown in FIG.l.
In greenhouses, plants are often grown on a substrate, which can be composed of a variety of different materials such as stone wool, peatmoss, coco, and/or perlite. Proteins and/or amino acids present in, or added to, the substrates are converted into the nitrate required for plant growth. This conversion is achieved by microorganisms present in, or added to, the substrate. However, the nitrate that can be made available solely by the microorganisms in the substrate is insufficient for decent plant growth. This is likely due to the limited conversion rate of the microorganisms in the substrate. This problem may be solved by increasing the volume of the substrate, however, this is undesired because this will result in too much vegetative growth and therefore in a non profitable yield.
It is advantageous to produce plants on substrate, as the growing conditions can be fully controlled and it is easy to disinfect the substrate for subsequent use. Furthermore, the incidence of soil-borne diseases and pests, such as for instance Fusarium phytopthora, is greatly reduced. It would even be more advantageous if plants on substrate can be grown organically, as organic products have a better quality, and organic vegetables and fruits also have a better taste. There is an increasing demand for organic products on the market. However, until now it has never been accomplished to cultivate plants on substrate in a fully organic manner, with 100% organic fertilizers. “Organic” in the context of the present invention means that the materials used are all derived from plant and/or animal matter. In the organic cultivation of plants, it is also accepted if a material comprises certain natural minerals not derived from plant or animal matter, such as for instance magnesium sulphate and trace elements. However, nitrogen is not one of these. At present, no plant nutrition exists that comprises nitrate derived from plant and/or animal matter. There is thus no plant nutrition that is fully organic.
Growers currently use inorganic or synthetic fertilizers when they cultivate plants on substrate. These fertilizers comprise nitrate as a chemically prepared element and are therefore not allowed for the organic production of plants. It has been tried to produce plants on substrates which are 100% organic, however, this still leads to unsatisfactory results. Therefore, minimal amounts of inorganic fertilizers are still being used. The disadvantage of this is that the plants produced with use of inorganic fertilizers cannot be qualified as being organically produced and cannot be labelled and sold as such.
It is therefore an object of the present invention to enable the cultivation of plants on substrates in a fully organic manner.
This object is achieved by using a nitrogen fertilizer that is fully organic.
In a first aspect, the invention therefore provides a method for producing an organic liquid having a high nitrate content, comprising: a) contacting a solution comprising proteins and/or amino acids as a source of organic nitrogen and a liquid with ammonification bacteria to convert organic nitrogen into ammonium (NH4+); and b) subsequently contacting the solution with nitrifying bacteria to convert ammonium (NH4+) to nitrate (N03“).
The solution resulting from this method is an organic liquid having a high nitrate content. This organic liquid having a high nitrate content is also referred to herein as “the organic liquid” or “the organic liquid of the invention”.
The organic liquid can be used to irrigate plants grown on substrate. By using the method of the present invention, proteins and amino acids are converted into nitrate before they are added to the substrate. As a result, the plants have access to a sufficient amount of nitrate and no inorganic material is being used.
The method of the invention is performed in two steps, wherein in a first step the proteins and/or amino acids are converted into ammonia (NH3) and subsequently into ammonium (NH4+), and the ammonium (NH4+) is converted into nitrite (N02) and subsequently into nitrate (N03) in a second step. Because these conversions are separated into two steps, no stagnation of the nitrate production takes place. This enables a continuous process for the production of an organic liquid having a high nitrate content, which cannot be achieved when ammonification and nitrification are performed in a single step.
With “high nitrate content” is meant that when a sample is taken and contacted with a nitrate test strip, the nitrate test strip turns into a specific colour indicated by the manufacture to be indicative of a high nitrate content. When using the 110020 Nitrate Test, a colorimetric method with test strips for 10 - 25 - 50 - 100 - 250 - 500 mg/1 N03 (MQuant™), purple is indicative of a high nitrate content. A person skilled in the art knows that several different nitrate test strips are available that may be used and is familiar with how to use them. The exact nitrogen concentration can also be quantified by a certified laboratory, following methods known to a person skilled in the art. A nitrogen concentration of at least 4 mmol/1 is considered as a high nitrate content. Preferably, the organic liquid produced has a nitrate content in the range of 4-15 mmol/1, more preferably in the range of 4-10 mmol/1, even more preferably in the range of 8-15 mmol/1, and most preferably in the range of 8-10 mmol/1.
The organic substance used in step (a) may be any organic substance comprising nitrogen as part of a biological compound. The biological compound may for instance be ammonium (NH4+), proteins and/or amino acids. Preferably, an organic substance is used which has a high content of ammonium (NH4+), proteins and/or amino acids. The organic substrate may also be enriched solely with ammonium (NH4+), proteins and/or amino acids. For instance, commercially available plant nutrition, such as organic products from Plant Health Cure or Koppert Biological systems, may be used. The organic substance may also comprise the minerals not derived from plant and/or animal matter which are accepted by the regulations to be part of an organic substance, such as for instance magnesium sulphate and trace elements. It is however preferred that the organic substance is free of these minerals.
The liquid in which the protein and/or amino acid-rich substance is dissolved is preferably water or an aqueous solution. The solution comprising the organic proteins and/or amino acids dissolved in a liquid is also referred to herein as influent.
The bacteria employed in step (a) may be any bacteria capable of converting proteins and/or amino acids into ammonia (NH3) and ammonium (NH4+). This conversion is also referred to as ammonification or mineralization. Suitable bacteria are known to a person skilled in the art and are commercially available.
The pH of the solution in step (a) shall be between 7.0 and 9.0, and preferably between 7.5 and 9.0. For achieving optimal results, the pH is preferably in the range of 8.0-9.0, and more preferably in the range of 8.5-9.0. The desired pH may be achieved by techniques known to a person skilled in the art.
The bacteria employed in step (b) may be any bacteria capable of converting ammonium (NH4+) into nitrite (N02), and nitrite (N02) into nitrate (N03). These conversions are also referred to as nitrification. Suitable bacteria, such as for instance nitrifying bacteria, are known to a person skilled in the art and are commercially available.
The pH of the solution in step (b) shall be between 5.0 and 8.0, preferably between 5.5 and 8.0, and more preferably between 6.0 and 8.0. For achieving optimal results, the pH of the solution in step (b) is preferably in the range of 5.5-7.7. The desired pH may be achieved by techniques known to a person skilled in the art.
The solution in step (a) is also referred to herein as effluent 1, and the solution in step (b) is also referred to herein as effluent 2.
The above method can be performed in a system or a device comprising a first container for dissolving the organic substance comprising proteins and/or amino acids in the liquid, a second container for ammonification, a third container for nitrification, and optionally a fourth container for receiving, storing and/or distributing the organic liquid having a high nitrate content obtained in the third container.
The ammonification and/or nitrifying bacteria may be present on biocarriers. These biocarriers may be used in the second and/or third container for increasing the surface for bacterial growth, and therefore increase the efficiency of the process.
The solution comprising the ammonification bacteria can be aerated, and the solution comprising the nitrifying bacteria must be aerated in order to improve and/or maintain bacterial life. Preferably, these solutions are aerated from below the second and/or third container.
In a second aspect, the invention provides an organic liquid having a high nitrate content.
In a preferred embodiment, the organic liquid having a high nitrate content is, or is part of, a plant nutrition. The invention thus also provides a plant nutrition having a high nitrate content. In one embodiment the organic liquid or plant nutrition has a nitrate content of at least 4 mmol/1. Preferably, the organic liquid or plant nutrition has a nitrate content of between 4 and 15 mmol/1, more preferably between 4 and 10 mmol/1, even more preferably between 8 and 15 mmol/1, and most preferably between 8 and 10 mmol/1. This organic liquid or plant nutrition is obtainable by the method as described above.
In a third aspect, the invention provides for the use of an organic liquid having a high nitrate content for organically cultivating plants on a substrate. The organic liquid having a high nitrate content can be used in addition to, or as part of, other organic plant nutrition. It may thus be mixed with other organic plant nutrition before adding it to the plants, or be given to the plants separately. If given separately, it may be given simultaneously, but also not simultaneously, with the other organic plant nutrition. In a preferred embodiment the organic liquid used for organically cultivating plants on a substrate has a nitrate content of at least 4 mmol/1, more preferably of between 4 and 15 mmol/1, more preferably of between 4 and 10 mmol/1, even more preferably of between 8 and 15 mmol/1, and most preferably of between 8 and 10 mmol/1. The organic liquid produced according to the present invention is and can be used as an organic fertilizer.
In a fourth aspect, the present invention provides a method for organically cultivating plants on a substrate, comprising adding an organic liquid having a high nitrate content to the substrate. In a preferred embodiment the organic liquid added has a nitrate content of at least 4 mmol/1, preferably of between 4-15 mmol/1, more preferably of between 4 and 10 mmol/1, even more preferably of between 8 and 15 mmol/1, and most preferably of between 8 and 10 mmol/1.. A person skilled in the art is capable of determining how much organic liquid shall be added. The organic liquid having a high nitrate content may be mixed with other organic plant nutrition and/or nutritional elements, such as for instance calcium, before adding it to the substrate, or be added to the substrate separately. If added separately, it may be added simultaneously, but also not simultaneously, with the other organic plant nutrition and/or nutritional elements.
The organic liquid having a high nitrate content may be added to the substrate by any suitable method known to a person skilled in the art.
The organic liquid having a high nitrate content may be added to any suitable substrate. A suitable substrate is an organic substrate made entirely of one or more, or a combination of, organic materials, such as for instance coco.
The plants produced on substrate may be any plant, but is in particular a plant useful in horticulture, such as vegetable plants, fruit plants, ornamental plants, including but not limited to flowers, medicinal plants, etc. In a preferred embodiment, the plant belongs to a species selected from the group consisting of Capsicum annuum, Cucumis sativus, and Solanum lycopersicum.
With the organic liquid having a high nitrate content as produced by the method of the present invention similar crop yields can be achieved as compared to crops grown when using traditional inorganic fertilizers. The organic liquid of the present invention is thus a very interesting product for the commercial organic market.
Figures FIG. 1 is a schematic overview of the nitrogen cycle. FIGs 2A and B are pictures of the growing pepper plants; FIG 2C is a graph of the pepper yield. FIGs 3A and B are pictures of the growing tomato plants; FIG 3C is a graph of the tomato yield. EXAMPLE 1
Producing a liquid having a high nitrate content
In a first container having 1000 1 capacity, the influent was prepared by dissolving 5 1 HOB, 0.5 1 Amino 2 (Bertels B.V) and 100 ml micro nutrients (Horticoop) in 1000 1 water. HOB is an internally prepared organic substance comprising proteins and amino acids. The container was aerated. The resulting influent comprised <0.2 mmol/l nitrate (N03) and 3.3 mmol/1 ammonium (NFL+), and a total nitrogen (N) content of 323 mg/1. The pH was 8.2 and the EC 1.1.
The influent was transferred into a second container by a pump with a flow rate of 1000 to 2000 ml /min . This second container comprised 300 1 bio carriers and was aerated. 100 ml ammonification bacteria (BactoPlus®) were added to the container to start the ammonification of proteins and/or amino acids into ammonium (NH4+). The EC of the resulting solution was measured to be 2.2 and the pH was 8.4. The solution, also referred to herein as effluent 1, comprised <0.2 mmol/l nitrate (N03~) and 15 mmol/l ammonium (NH4+).
The resulting effluent 1 was transferred with the same flow rate of 1000 to 2000 ml/min to a third container. This third container also comprised biocarriers. 100 ml nitrifying bacteria (BactoPlus®) were added to the container to start the nitrification of ammonium (NH4+) into nitrate (N03). The EC and pH of the resulting solution, also referred to herein as effluent 2, were measured to be 1.8 and 7.1 respectively.. The solution comprised 9.1 mmol/l nitrate (N03 ) and 7.2 mmol/l ammonium (NH4+).
The resulting effluent 2 was transferred to a fourth container, where it was stored until use.
In other batches, nitrate (N03) contents of 8.3 and 10.0 mmol/l were achieved. EXAMPLE 2
Organic growing of pepper plants
Seeds of pepper plants of the variety Marietta were sown in 100% coco substrate. Plants were cultivated as is common in the art, however, instead of watering the plants with water comprising mineral plant nutrition the plants were watered with a mixture comprising the liquid having a high nitrate content of the present invention, basin water, Horti-organic A, Horti-organic B, micro nutrients, and iron. Different mixture compositions were used throughout the experiment, starting with Mixture 1 and finishing with Mixture 4. The compositions of these mixtures are as indicated in Table 1. The mixture always comprised about 25% (volume) of the liquid having a high nitrate content of the present invention.
Table 1
Peppers were harvested as normal, and every week the weight of the harvested peppers were determined. Figure 2 shows that after 26 weeks, almost 8.0 kg/m2 of peppers were harvested. This is about 90% of the yield obtained by the traditional cultivation of Marietta peppers, i.e. when watering the plants with water comprising mineral plant nutrition. EXAMPLE 3
Organic growing of tomato plants
Seeds of tomato plants of the variety Careza were sown in 100% coco substrate. Plants were cultivated as is common in the art, however, instead of watering with water comprising mineral plant nutrition the plants were watered with a mixture comprising the liquid having a high nitrate content of the present invention, basin water, Horti-organic A, Horti-organic B, micro nutrients, and iron. Two different mixture compositions were used throughout the experiment, starting with Mixture 1 and finishing with Mixture 2. The compositions of these mixtures are as indicated in Table 2. The mixture always comprised about 25% (volume) of the liquid having a high nitrate content of the present invention.
Table 2
Tomato fruits were harvested as normal, and every week the weight of the harvested tomato fruits were determined. Figure 1 shows that after 25 weeks, almost 17.0 kg/m2 of tomato fruits were harvested. This is about 90% of the yield obtained by the traditional cultivation of Careza tomato plants, i.e. when watering the plants with water comprising mineral plant nutrition. EXAMPLE 4
Organic growing of cucumber plants
Seeds of cucmber plants of the variety Proloog are sown in 100% coco substrate. Plants are cultivated as is common in the art, however, instead of watering with water comprising mineral plant nutrition the plants are watered with a mixture comprising the liquid having a high nitrate content of the present invention, basin water, Horti-organic A, Horti-organic B, magnesium sulphate, micro nutrients, and iron, as indicated in Table 3.
Table 3
Cucumber fruits are harvested as normal, and every week the weight of the harvested cucumber fruits are determined. About 90% of the yield obtained by the traditional cultivation of
Proloog cucumber plants, i.e. when watering the plants with water comprising mineral plant nutrition, is achieved.
The results from these Examples indicate that the use of the organic liquid produced by the method of the present invention is commercially interesting for the organic market.

Claims (6)

1. Werkwijze voor het produceren van een organische vloeistof met een nitraatgehalte van 8-15 mmol/1, omvattende: a) het in contact brengen van een oplossing omvattende eiwitten en/of aminozuren als een bron van organische stikstof en een vloeistof met ammonificatiebacteriën om organische stikstof om te zetten in ammonium (NH4+); en b) het vervolgens in contact brengen van de oplossing met nitrificerende bacteriën om ammonium (NH4+) om te zetten in nitraat (N03 ) waarbij de organische vloeistof geschikt is voor het biologisch telen van planten in een substraat.A method for producing an organic liquid with a nitrate content of 8-15 mmol / l, comprising: a) contacting a solution comprising proteins and / or amino acids as a source of organic nitrogen and a liquid with ammonification bacteria to converting organic nitrogen to ammonium (NH 4 +); and b) subsequently contacting the solution with nitrifying bacteria to convert ammonium (NH 4 +) to nitrate (NO 3) wherein the organic liquid is suitable for biologically growing plants in a substrate. 2. Werkwijze volgens conclusie 1, waarbij stap (a) wordt uitgevoerd bij een pH van boven 8,0, bij voorkeur bij een pH in hel bereik van 8,0-9,0.A method according to claim 1, wherein step (a) is carried out at a pH above 8.0, preferably at a pH in the range of 8.0-9.0. 3. Werkwijze volgens conclusie 1 of 2, waarbij stap (b) wordt uitgevoerd bij een pH van tussen 5,0 en 8,0, bij voorkeur bij een pH van tussen 5,5 en 7,7.Method according to claim 1 or 2, wherein step (b) is carried out at a pH of between 5.0 and 8.0, preferably at a pH of between 5.5 and 7.7. 4. Organische plantvoeding met een nitraatgehalte van 8-15 mmol/1, waarbij de organische plantvoeding geschikt is voor het biologisch telen van planten in een substraat.4. Organic plant food with a nitrate content of 8-15 mmol / l, wherein the organic plant food is suitable for organically growing plants in a substrate. 5. Gebruik van een organische vloeistof met een nitraatgehalte van 8-15 mmol/1 voor het organisch telen van planten in een substraat.5. Use of an organic liquid with a nitrate content of 8-15 mmol / l for organically growing plants in a substrate. 6. Werkwijze voor het organisch telen van planten op een substraat, omvattende het toevoegen van een organische vloeistof met een nitraatgehalte van 8-15 mmol/1 aan het substraat.A method for organically growing plants on a substrate, comprising adding an organic liquid with a nitrate content of 8-15 mmol / l to the substrate.
NL2015253A 2015-08-03 2015-08-03 Organic liquid having high nitrate content for use in the organic cultivation of plants. NL2015253B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL2015253A NL2015253B1 (en) 2015-08-03 2015-08-03 Organic liquid having high nitrate content for use in the organic cultivation of plants.
US15/748,605 US20190002360A1 (en) 2015-08-03 2016-08-02 Organic Liquid Having High Nitrate Content for Use in the Organic Cultivation of Plants on a Substrate
CA2994400A CA2994400A1 (en) 2015-08-03 2016-08-02 Organic liquid having high nitrate content for use in the organic cultivation of plants on a substrate
EP16745756.3A EP3332015A1 (en) 2015-08-03 2016-08-02 Organic liquid having high nitrate content for use in the organic cultivation of plants on a substrate
PCT/EP2016/068446 WO2017021415A1 (en) 2015-08-03 2016-08-02 Organic liquid having high nitrate content for use in the organic cultivation of plants on a substrate
MX2018001376A MX2018001376A (en) 2015-08-03 2016-08-02 Organic liquid having high nitrate content for use in the organic cultivation of plants on a substrate.

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CH636330A5 (en) * 1979-03-14 1983-05-31 Saf Soc Agricole Fonciere MANURE TREATMENT PROCESS.
CN101519265B (en) * 2009-04-09 2011-07-13 孙友峰 Sewage treatment process and system

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