코크스 폐수를 이용한 활성슬러지 모델 파라미터의 민감도 분석

초록

Activated sludge model (ASM, IAWQ Task Group) was developed as a general mathematical model to express major biological processes in municipal wastewater treatment. Therefore this model could be applied for the design of a wastewater treatment plant and used for finding optimal conditions in plant oper- ation. Since biological processes adopting biodegradation have been also used to treat lots of industrial wastewater such as coke's wastewater, it is worthy to examine the applicability of ASM on the industrial wastewater treatment. In order to evaluate this possibility, the sensitivity analysis of seven parameters (Y(H), μ(H), b(H), K(h), K(S), K(O,H), K(X)) in ASM was conducted with regard to the SCOD (soluble chemical oxygen demand) removal in coke's wastewater treatment. It has shown that u, (maximum specific growth rate) of ASM was the most sensitive one in the SCOD removal process, and relative sensitivity was decided in order of μ(H) >> b(H), K(S) > Y(H), K(O,H), K(h), K(X), consequently. Based on the sensitivity analysis and calibration procedure of ASM with the data from coke's plant, the decided parameter values were valid for the proper simulation of this industrial wastewater plant, showing adequate fitting between real and simulated data. In summary, the mathematical model of ASM was suitable for the simulation of coke's wastewater treatment plant.