Abstract
The objectives of this research were to investigate the feasibility of direct filtration (DF) of raw sewage, and decomposition of captured organic matters by thermophilic oxic process (TOP). Feasibility of this process was assessed by determining removal efficiencies of SS, BOD, and the change in particle size distribution when filtration rates are changed. Wood chips of which size is 10mm was used as media both for direct filtration and thermophilic oxic process. When the filtration rate ranged from 100-220m·d-1, removal efficiencies of SS and BOD by the filtration were 70-80% and 40-50%, respectively. Approximately 70-80% of captured BOD was decomposed by TOP with the aeration rate of 100 1·m-3·min-1 and BOD load of 3.0kg·m-3·d-1. The media can be reused both for filtration and thermophilic oxic process without backwash
