浸漬型 生物購工法에 있어서 爆氣强度가 處理 效率에 미치는 影響

Effect of Aeration Intensity on the Treatment Efficiency in Submerged Biofilm Process

An aerated submerged biofilm reactor is the reactor in which influent organic substrates are aerobically oxidized by suspended biomass and attached biomass of biofilm grown on the surface of submerged media. The objective of this study was to investigate the effect of aeration intensity on microbial characteristics and treatment efficiency in submerged biofilm process. In the organic loading rate (4.3kg BOD/m³⋅day), biofilm thickness (420-780μm) and attached biomass(1.79-2.94mg/cm²) increased as the aeration intensity increased (2-8m³ air/m²⋅hr), but biofilm density decreased (42.25-37.69mg/cm³). The minimum aeration intensity for prevention of deposited biomass was 2m³ air/m²⋅hr. The minimum dissolved oxygen of 2.5mg/l had to be maintained for improved efficiency.