THE IMPROVED TREATMENT OF SECONDARY EFFLUENT WITH ULTRAFIL TRATION

摘要

The use of the membrane process ultrafiltration for the improved treatment of secondary effluents of municipal waste water treatment plants is becoming an important tool in global water management strategies. The aim here is to disinfect and purify the wastewater downstream of the biological treatment steps by separating all suspended solids, including bacteria and viruses, and part of the macromolecules. This allows for increasing the exploitation potential of water in general by recycling or reuse of the purified water. The paper presents technical details of plants operated in deadend mode, equipped with membranes that are backwashed with an air-water mixture, descriptions of the filtrate qualities obtained, and application examples for a broad spectrum of treatment capacities.