역유동층 생물막 반응기를 이용하여 아파트 오수를 처리하였다. 평균 유입 TCOD는 380mg/L, SCOD는 182mg/L였으며, HRT를 바꾸어 주면서 실험하였다. 수리학적 부하량을 0.3kgCOD/m³·day로 높여 주었을 때 SCOD농도는 12.0mg/L에서 44.0mg/L, 미생물 농도는 3272mg/L에서 10556mg/L, 생물막 두께는 40.0μm에서 132.7μm로 두꺼워졌다. 그러나 생물막 건조밀도는 0.060g/mL에서 0.024g/mL로 낮아졌다. 오수에 함유되어 있는 LAS농도는 16.0mg/L에서 26.0mg/L의 범위였으며, 수리학적 부하량 4.5kgCOD/m³·day에서도 LAS는 95%이상이 제거되었다. 반응속도식을 1차로 가정한 유출 SCOD 예측은 실험값과 5%의 상대오차로 잘 일치하였다.

Wastewater of an apartment was treated in an inverse fluidized bed biofilm reactor to investigate the variation of effluent TCOD(influent mean value; 380mg/L) and SCOD(influent mean value; 182mg/L) for various HRT at 22℃. When the hydraulic loading rate was increased from 0.3kgCOD/m³·day to 4.5kgCOD/m³·day, the effluent SCOD, the biomass concentration, and the biofilm thickness increased from 12.0mg/L to 44.0mg/L, from 3272mg/L to 10556mg/L, and from 40.0㎛ to 132.7㎛, respectively. But the biofilm dry density was decreased from 0.060g/mL to 0.024g/mL. The influent concentration of LAS ranged from 16.0mg/L to 26.0mg/L in the wastewater of this apartment. LAS removal efficiency was higher than 95% this system, even at a hydraulic loading rate of 4.5kgCOD/m³·day. Prediction of the effluent SCOD value by using the mathematical model well agreed to the observed values within 5% of error.

Inverse Fluidized Bed Biofilm Reactor Sewage Apartment LAS

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