Abstract
Process behavior of a novel bioreactor for sewage treatment, in which a net membrane unit was installed as an alternative of final settling chamber, was examined by conducting a continuous flow experiment. A polyester-made net membrane unit having 77μm mesh size and 37% of opening area was employed. Permeate flux was ranged 0.6 to 1.5 m·d-1 and permeate SS was maintained below 10mg·L-1 under 100mm H2O pressure. The proposed net membrane bioreactor system achieved simultaneously over 90% SS removal, over 90% COD removal, and 85% ammonium removal, demonstrating the system could be an attractive alternative for final settling chamber of activated sludge process.
