Abstract: A method of extracting sweet compounds from stevia plant powder includes mixing stevia powder and deionized water to create a stevia powder slurry, filtering the slurry and adding it to an extraction column, adding an ethanol solution to create an elute, mixing the elute with activated charcoal and filtering the elute, removing the ethanol and water from the elute, and spraying the elute to produce the sweet compounds.

Abstract: A method of extracting sweet compounds from stevia plant powder includes mixing stevia powder and deionized water to create a stevia powder slurry, filtering the slurry and adding it to an extraction column, adding an ethanol solution to create an elute, mixing the elute with activated charcoal and filtering the elute, removing the ethanol and water from the elute, and spraying the elute to produce the sweet compounds.

Abstract: A method of extracting sweet compounds from stevia plant powder includes mixing stevia powder and deionized water to create a stevia powder slurry, filtering the slurry and adding it to an extraction column, adding an ethanol solution to create an elute, mixing the elute with activated charcoal and filtering the elute, removing the ethanol and water from the elute, and spraying the elute to produce the sweet compounds.

Abstract: A wastewater treatment facility with a rotating biological contactor (“RBC”) system. The RBC sits in a tank that receives wastewater to be purified. The tank supports a rotatable shaft. One or more stages of rotating disk assembles progressively purify incoming wastewater. Each stage is oriented transversely to the shaft and has a plurality of disk assemblies. Each disk assembly has a number of disks. Each of the disks comprises multiple concentric arcuate segments. The segments are provided with two generally radially extending edges, two circumferential edges that extend between the two radially extending legs, and a front face and a back face. Posts extend from the front and back faces of the disks for stirring wastewater and for offering a site for adherence of biomass suspended in the wastewater. Connecting members interconnect adjacent disks and optionally define a flow channel therebetween.