Embodiments of the present disclosure provide for systems for removing contaminants from a leachate, methods of removing contaminants from a leachate, and the like.

The present invention provides an improved process for isolating 2,4-bis-(2,4-dihydroxyphenyl)-6-(4-methoxyphenyl)-1,3,5-triazine (DIOPAT) from an aqueous alkaline mixture M having a pH of 10 or more and comprising the 2,4-bis-(2,4-dihydroxyphenyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4-dihydroxybenzophenone, and aluminum salts, wherein the process comprises a nanofiltration step, a precipitation step, and a further filtration step.

Conventional oil-water separation methods are inefficient since they break down a given primary phase into two secondary phases, one is richer and the other one is poorer in the secondary phase of the primary phase. As such, neither oil is recovered as a readily de-watered stream nor is water recovered as a readily de-oiled stream. However, de-watering and de-oiling of oil-water streams are synonymous, and therefore they should be simultaneously targeted by an efficient method. There are provided herein systems and methods to effectively treat oil-water streams by simultaneously de-watering the oil phase and de-oiling the water phase, de-scaling the de-oiled water phase, and de-salting the de-scaled water phase.

Embodiments of the present disclosure provide for systems for removing contaminants from a leachate, methods of removing contaminants from a leachate, and the like.

An integrated, membrane-based process to produce purified water and conversion of salt to high value chemicals from oil and gas well produced water is described. A liquid stream including water and dissolved salt is flowed through pretreatment units and one or more desalination and concentration units which remove at least a portion of the water to form a brine enriched in dissolved salt. The purified high-density brine may be subjected to electrically-enforced salt dissociation techniques to produce chemicals from oil and gas produced water.

Disclosed is a continuous process for the purification of steviol glycosides extracted from the dried stevia leaves using continuous simulated moving bed processes and nanofiltration without the addition of organic solvents to obtain a purified steviol product comprising sweet steviol glycosides. The sweet steviol glycosides can be used as substitutes for caloric sweeteners in beverages and in other food items.

The present disclosure is generally directed to a desalination system. In some embodiments, the desalination system includes one or more recycle seawater systems configured to receive one or more concentrated brine streams produced by the desalination system and generate one or more recycle brine streams using the one or more concentrated brine streams and desalinated water.

Methods for converting cow's milk into a low pH, ready to drink yogurt product having the compositional attributes of human milk include combinations of ultrafiltration, nanofiltration, reverse osmosis, and diafiltration using microfiltration membranes, followed by heat treatment and fermentation.

Embodiments of the present disclosure provide for systems for removing contaminants from a leachate, methods of removing contaminants from a leachate, and the like.

Systems and methods for reducing at least one of magnesium, calcium and/or sulfate from sodium chloride brine are described. Systems and methods include nanofiltrating seawater to reduce calcium, magnesium, and sulfate therein. Systems and methods also include introducing permeate from the nanofiltration step as a feed to reverse osmosis (RO) followed by a progressive nanofiltration array. Systems and methods also include feeding the lower salinity permeate from the introducing permeate step to another RO system. Systems and methods also include feeding retentate from the feeding step to a progressive nanofiltration system that concentrates the brine to an appropriate salinity.