The paper is aimed to introduce an economic method for treating bath sewage by using a immobilized biologically activated carbon fiber(IBACF) technology. Specifically speaking, the above said sewage is supposed to be disposed by means of coagulation-sand filtration-IBACF technology as a coagulating agent(PAC and PAM) and letting it pass through the sand filtration pretreatment. In so doing, the bath sewage is let to pass the aeration basin and then enter the IBACF column. The conditions needed to finish the...