The feasibility of an absorbent biofilter system was examined forrural wastewater treatment in Korea. Hydraulic loading rates variedfrom 50 to 250 cm/day. Effluent of the septic tank was fed into theabsorbent biofilter, and small ventilation fan was provided to supplyair at the rate of 250 L/min to aerate the biofilter. The biofiltersystem demonstrated high removal rates for BOD_5 and TSS at theloading rate of 150 cm/day, generally meeting the Korean effluentwater quality standard of 20 mg/L applicable to both.
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