2 Natural Treatment System by Waste Stabilization Ponds Coupled with Water Hyacinth Ponds for Upgrading a Secondary Effluent

摘要

PURPOSE: A natural treatment system by wastewater stabilization ponds coupled with water hyacinth ponds for improving water quality of secondary effluent is provided. CONSTITUTION: Secondary effluent is treated by the wastewater stabilization ponds(31) and water hyacinth ponds(32) continuously. Cost and mechanical use of the system is low compared with conventional third treatment plant. For improving treating efficiency, discharge water of the system is recycled to inlet of the system.