FIELD: process engineering.
SUBSTANCE: invention relates to biological water treatment. Effluents 1 are fed into membrane bioreactor 2. Said effluents pass in succession through anaerobic 2, anoxic 3 and aerated 5 vessels, the latter incorporating membrane 5. Polyelectrolyte 9 is added into each vessel. Sediment is circulated from anoxic vessel 3 into anaerobic vessel 2 and from aerated vessel 4 into anoxic vessel 3. Purified water is forced out by pumps.
EFFECT: higher efficiency.
19 cl, 4 dwg
Authors
Dates
2010-11-20—Published
2005-07-26—Filed