Patent ID: 6113787
Filing Date: 2000-09-05
Classification: B01D,C02F

Abstract:
A method for the treatment of water from a biological degradation process, comprising the steps offirst subjecting compounds in the water difficult to degrade by the biological degradation process to destruction by catalytic cracking or an oxidation process,then placing the water alternately into aerobic and anaerobic states,subsequently ultrafiltering the water from the alternate treatment step,nano-filtering the water after the ultrafiltration step,separating retent during the ultrafiltration and/or nano-filtration steps and feeding the retent to the step in which the water is alternately placed into the aerobic and anaerobic states, andfeeding compounds contained in the retent from nano-filtration step and which are difficult to degrade by the biological degradation process to the step of subjecting the compounds to destruction by the catalytic cracking or oxidation process and subsequently feeding the same to the step in which the water is alternately placed into the aerobic and anaerobic states.