Water filters; Water filtration apparatus; Water purification apparatus; Water treatment apparatus; Waste fluid purification apparatus; Waste fluid filtration apparatus; Wastewater treatment apparatus; Water treatment equipment, namely, water filtration units; Water treatment equipment, namely, filtration membranes; Water treatment equipment, namely, reverse osmosis units; Water treatment equipment, namely, zwitterion filtration units; Water purifying units for commercial and industrial use; Water filtering units for commercial and industrial use; Sustainable onsite water recycling and wastewater treatment systems; Fluid separation and concentration units; fractionation apparatus used in the separation of fluids