US 12,473,238 B2
Method and system for providing plants with water comprising a high nitrate content
Carolus Wilhelmus Maria De Bruijn, Monster (NL); and Arnaud Marinus Aart Duine, Wageningen (NL)
Assigned to Van der Knaap Diensten B.V., Kwintsheul (NL); and Triqua International B.V., Ede (NL)
Appl. No. 17/434,151
Filed by Van der Knaap Diensten B.V., Kwintsheul (NL); and Triqua International B.V., Ede (NL)
PCT Filed Mar. 11, 2020, PCT No. PCT/EP2020/056562
§ 371(c)(1), (2) Date Aug. 26, 2021,
PCT Pub. No. WO2020/182913, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 2022724 (NL), filed on Mar. 12, 2019.
Prior Publication US 2022/0162132 A1, May 26, 2022
Int. Cl. C05C 5/00 (2006.01); C05F 17/20 (2020.01); C05F 17/40 (2020.01)
CPC C05C 5/00 (2013.01) [C05F 17/20 (2020.01); C05F 17/40 (2020.01)] 5 Claims
OG exemplary drawing
 
1. A method for producing water having a stable nitrate content of between 10-200 mmol/l in a continuous flow system, the method comprising:
a) contacting water comprising organic matter having at least 100 ppm of nitrogen compounds with ammonification and nitrifying bacteria to obtain water having a nitrate content of between 10-200 mmol/l;
b) passing the water obtained in step a) through a membrane to separate organic matter, fungi, and/or bacteria from the water, wherein the membrane has a pore size of between 0.01-0.1 μm; and
c) optionally collecting the water, which has a stable nitrate content of between 10-200 mmol/l and which is substantially free of organic matter, fungi, and/or bacteria,
wherein no extra mineral salt is added to the water, wherein the stable nitrate content is the result of the step of passing the water through the membrane, and wherein the nitrate content of the water is stable for at least one week, and
wherein the continuous flow system comprises a bioreactor in which both ammonification and nitrifying bacteria are employed and wherein the bioreactor comprises the membrane to separate organic matter, fungi, and/or bacteria from the water.