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회전원판법에서의 부착생물막 및 박리오니의 증식 , 분해 특성
김응호 대한상하수도학회 1987 상하수도학회지 Vol.1 No.-
There is little information to describe the characteristics of sludge production in a fixed-film biological waste treatment system. The primary objective of this study is to determine experimenatally the observed yield Y_(0b), true yield Y, and sludge decreasing rate constant k_d in RBC system. Single-stage RBC unit was used for organic removal and two-stage unit for both organic removal and nitrification. Sludge production in RBC was highly fluctuated even though treatment efficiency was under steady state. Therefore, continuous and long-term (more than 1 or 2 weeks at least) measure was essential for accurate determination of Y_(0b), Y, and k_d. From single-stage experiments, Y_(0b) and Y based on COD was determined as 0.27 to 0.47 and 0.55, respectively, and k_d as 0.05 to 0.12d^(-1). From two-stage ones, Y_(0b) based on COD was also determined as 0.21 to 0.28, and this was evaluated as 40 to 50% of the Y_(0b) in activated sludge process.