Waste water treatment tanks; Water treatment apparatus, namely, clarification and thickening machines for use in treatment of liquids in the nature of water, waste water and industrial water; Waste water treatment apparatus; Biological contactor for treatment of sewage and drainage water; Sustainable onsite water recycling and wastewater treatment systems; Thickening and dewatering machines for use in treatment of liquids including water, industrial effluent and sewage; Environmental control ...