摘要:
A waste water treatment system including an electrolysis treatment system and three membrane concentration systems. The electrolysis treatment system includes a first chamber that receives waste water and produces treated waste water, a second chamber that receives first recycled water and produces dilute acid discharge, and a third chamber that receives second recycled water and produces dilute caustic discharge. An anion exchange membrane separates the first chamber from the second chamber. A cation exchange membrane separates the first chamber from the third chamber. The membrane concentration system receives the treated waste water and produces a concentrated aqueous sodium sulfate product and a pure water product. A first thermal concentration system receives the dilute acid discharge and produces first recycled water and a concentrated acid product. The second thermal concentration system receives the dilute caustic discharge and produces second recycled water and a concentrated aqueous sodium sulfate product.
摘要:
A liquid waste treatment system includes: a baffle tank subsystem for particle settling; a preprocess tank subsystem downstream of the baffle tank subsystem; a process tank subsystem downstream of the preprocess tank subsystem; and a storage tank subsystem downstream of the process tank subsystem for the storage of treated liquid. A Microbial Fuel Cell (MFC) processing module may be included and may be inserted into the preprocess tank subsystem or implemented in a second process tank downstream of the process tank subsystem. A faster disinfection may occur in the process tank subsystem, and a slower disinfection may occur in the second process tank according to distinct respective kill curves. An electrochemical cell may be operated in a pulse mode in liquid waste in a pulsed mode.
摘要:
This invention is related to a method based on the use of innovative membrane systems with different combinations, which deals with whey as cheese production wastewater that should be significantly taken into account in relation to environmental pollution from the dairy industry; in comparison to pressure-driven membrane process combinations in common use (32-40% water recovery and production of concentrated whey in 15-20% solid content), whose main purpose is to both recover water from whey at higher water recovery percentages (65-80%) having reusable quality in the production process and to technically and commercially enable increased economic production of whey powder by means of concentrated whey obtainment having higher solid percentages (25-35%).
摘要:
Devices, methods, and systems for producing a concentrated feed stream and a diluted feed stream using a solute stream provided to the low pressure side of the semi-permeable membrane during a reverse osmosis process. The process includes providing a semipermeable membrane having a first side and a second side and introducing a first feed solution stream on the first side of the membrane and a second feed solution stream on the second side, wherein the osmotic pressure of the of the first feed solution stream is greater than or equal to the osmotic pressure of the second feed solution stream. The process further includes exerting hydrostatic pressure on the first side of the membrane such that solvent passes from the first side to the second side thereby producing a concentrated first feed solution stream and a diluted second feed solution stream. Devices and systems for performing the processes are provided.
摘要:
Embodiments disclosed herein are directed to methods and systems for treating wastewater via forward osmosis. By way of example, the methods and systems disclosed herein may be used to filter one or more precipitated salts and/or other particles from wastewater generated by power plants such as flue gas wastewater, oil and gas wastewater, and other industrial processes. For example, the methods and systems disclosed herein may be used to filter one or more precipitated salts from a wastewater feed concentrate formed during the forward osmosis process that is recirculated through at least one membrane module to continue the forward osmosis process. Filtering the one or more precipitated salts from the wastewater feed concentrate helps limit clogging of open channel feed spacer(s) of the at least one membrane module.
摘要:
Provided herein are osmotic desalination methods and associated systems. According to certain embodiments, multiple osmotic membranes may be used to perform a series of osmosis steps, such that an output stream having a relatively high water purity - compared to a water purity of an aqueous feed stream - is produced. In some embodiments, multiple draw streams can be used to produce aqueous product streams having sequentially higher purities of water. Certain embodiments are related to osmotic desalination systems and methods in which forward osmosis is used to produce a first product stream having a relatively high water purity relative to an aqueous feed stream, and reverse osmosis is used to perform a second step (and/or additional steps) on the first product stream. In some embodiments, multiple reverse osmosis steps can be used in series to perform a net desalination process.
摘要:
Procédé de purification d'un premier liquide comprenant de l'eau et au moins une impureté par osmose directe, dans lequel on réalise les étapes successives suivantes : a) on met en contact le premier liquide avec un premier côté d'une membrane semi-perméable, un second liquide aqueux contenant un agent osmotique étant en contact avec le second côté de la membrane semi-perméable, moyennant quoi l'eau est extraite par osmose directe du premier liquide au travers de la membrane semi-perméable et passe dans le second liquide contenant l'agent osmotique; b) on forme des clathrates hydrates d'une molécule hôte dans le second liquide contenant l'agent osmotique dans lequel l'eau est passée; c) on sépare les clathrates hydrates du second liquide contenant l'agent osmotique; et d) on dissocie les clathrates hydrates séparés pour obtenir de l'eau pure et la molécule hôte. Installation pour la mise en œuvre de ce procédé.
摘要:
The present invention relates to a novel forward osmosis (FO) process for dewatering of a variety of feed solution using low water activity and high osmotic pressure deep eutectic solvent with and without dispersed magnetic nanoparticles as draw solution. In particular, choline chloride-ethylene glycol, choline chloride- glycerol, Fe304 dispersed in former and latter were utilized as draw solution in FO for one step desalination of brackish and seawater, water recovery from effluent of leather and dye industries, protein and DNA concentration at room temperature. Owing to very low freezing point, the diluted draw solution after FO was recovered through phase separation by chilling at Ca. -10 °C with concomitant production of usable water. Although the present invention focused on specific DES and dispersion of Fe3O4 as magnetic nanoparticles but use of other DES having high osmotic pressure and low freezing point and other magnetic nanoparticles dispersion are logical extension of present invention.
摘要:
The invention relates to osmotically driven membrane processes and systems and methods for recovering draw solutes in the osmotically driven membrane processes. Osmotically driven membrane processes involve the extraction of a solvent from a first solution by using a second concentrated solution to draw the solvent from the first solution across a semi -permeable membrane. Draw solute recovery may be carried out by various means to recover and recycle draw solutes contained within a diluted second solution and obtain a product solvent.