The present invention is a filtration system and a method for cleaning a filtration system. The filtration system comprising a hydraulic circuit Cp recycling the permeate stream to the feed side of the membrane and/or a hydraulic circuit Cr recycling the retentate stream to the feed side of said membrane. The method injects an amount of a chemical product into the filtration system in the hydraulic circuit Cp or in the hydraulic circuit Cr or upstream of the cross-flow filtration membrane, setting the proportion of recycled permeate stream or recycled retentate stream collected in the hydraulic circuit Cp and/or Cr to enable the recycling of a significant amount of unreacted chemical product having passed through the cross-flow filtration membrane to the feed side of said cross-flow filtration membrane.

The present invention is a filtration system and a method for cleaning a filtration system. The filtration system comprising a hydraulic circuit Cp recycling the permeate stream to the feed side of the membrane and/or a hydraulic circuit Cr recycling the retentate stream to the feed side of said membrane. The method injects an amount of a chemical product into the filtration system in the hydraulic circuit Cp or in the hydraulic circuit Cr or upstream of the cross-flow filtration membrane, setting the proportion of recycled permeate stream or recycled retentate stream collected in the hydraulic circuit Cp and/or Cr to enable the recycling of a significant amount of unreacted chemical product having passed through the cross-flow filtration membrane to the feed side of said cross-flow filtration membrane.

Production of orange juice is described. Raw orange juice is ultrafiltrated in an ultrafilter, thereby obtaining a retentate and a permeate. Only the retentate is pasteurized in a pasteurizer. The pasteurized retentate and the permeate is mixed in a mixing unit. A minimization of enzymes and microorganisms is thereby obtained in the orange juice.

This specification relates to preparing a purified human milk oligosaccharide (HMO) from an HMO solution by a process comprising nanofiltration, as well as processes for making foods, dietary supplements, medicines and infant formulas comprising a purified HMO. This specification also relates to purified HMOs and foods, dietary supplements, medicines and infant formulas prepared by processes disclosed in this specification.

A precipitation system for precipitating the target component is provided. The precipitation system includes: a reverse osmosis module; a precipitation device; a membrane separation device that includes a semipermeable membrane module including a first chamber and a second chamber separated by a semipermeable membrane, and that makes the feed solution after precipitation of the target component in the precipitation device flow to each of the first chamber and the second chamber and pressurizes the feed solution in the first chamber to transfer water into the second chamber via the semipermeable membrane and thereby concentrate the feed solution in the first chamber and dilute the feed solution in the second chamber; first return means for returning the feed solution concentrated in the membrane separation device to the precipitation device; and second return means for returning the feed solution diluted in the membrane separation device to the reverse osmosis module.

The present disclosure provides a system for extracting long chain dicarboxylic acid, the system comprising: a primary membrane filtration unit, a first crystallization unit, a first separation unit, a first dissolution tank, a secondary membrane filtration unit, a second separation unit, a second crystallization unit and a third separation unit. By the system for extracting long chain dicarboxylic acid of an embodiment of the present invention, the resulted long chain dicarboxylic acid product has a high purity, very low and even no residual alkane residue, and organic solvent-free.

The present disclosure provides a system for refining long chain dicarboxylic acid, comprising: a first membrane filtration unit, for a first membrane filtration of a long chain dicarboxylic acid fermentation broth or a treated liquid therefrom; a first decolorization unit, for carrying out a first decolorization treatment to the filtrate obtained after the membrane filtration; a first acidification/crystallization unit, for carrying out a first acidification/crystallization of a filtrate obtained after the membrane filtration to give a solid-liquid mixture; a first separation unit, for a solid-liquid separation of the solid-liquid mixture; a drying unit, for drying the solid separated by the separation unit to give a first solid. By using the refining system according to the present disclosure, the purity of the obtained product is high, and the disadvantages such as poor quality of the product obtained by crystallization from a solvent and environment pollution caused by a solvent can be overcome.

A submerged offshore reverse osmosis desalination apparatus and method uses product water from the apparatus and an onshore cooler or heat exchanger provide or improve the cooling of a Sea Water Air Conditioning (SWAC) system, power plant, data center, Ocean Thermal Energy Conversion (OTEC) system, or Rankine Cycle heat engine.

A treatment of demineralization effluents, particularly recycling effluents, a method for demineralizing whey and treating the effluents, and a facility for implementation thereof. The treatment of whey demineralization effluents includes: i) supplying a whey demineralization effluent, ii) treating by reverse osmosis effluent recovered in i) to obtain a reverse osmosis permeate and retentate, iii) neutralizing the retentate pH, iv) treating the neutralized retentate by nanofiltration to obtain a permeate including monovalent ions and a retentate including divalent ions and residual organic materials, v) treating the permeate in iv) by electrodialysis with bipolar membrane to obtain acidic solution(s) and basic solution(s). Thus, it is possible to treat effluents, limit their environmental impact, generate solutions for the whey demineralization process, reduce the cost of whey demineralization because some process water from electrodialysis comes from treatment of the generated effluents, and reduce the total amount of effluent sent to the wastewater treatment plant.

Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water is concentrated in a reverse osmosis step and salt from the resulting solution is removed in supercritical conditions prior to destruction of PFAS in supercritical conditions.