Process kinetics of an activated-sludge reactor system treating poultry slaughterhouse wastewater.
The principal objective was to generate the essential kinetic parameters for model simulation and operation management of an activated-sludge reactor (ASR) system treating poultry slaughterhouse wastewater. By varying four different mean cell residence times (theta(c) = 4.6-24.3 d), the ASR system (26 degrees C) removed effectively 93.5%-97.2% of chemical oxygen demand (COD) from wastewater. Ifa high COD removal efficiency and a low effluent volatile suspended solids (VSS) concentration are of great concern, a theta(c) of 15-24 d or a food to microorganism (F/M) ratio of 0.3-0.7 kg COD/kg VSS-d is suggested; if resource sustainability and enhanced operation of the ASR system are of great concern, a theta(c) of 9 d or an F/M ratio of 0.9 kg COD/kg VSS-d is suggested. The COD residual concentrations and COD removal efficiencies calculated by using the Monod model agreed well with the experimental results. When the parameters k and Ks (deltaP/P) were respectively varied from -100% to +100%, the parametric sensitivity analysis showed that the COD residual concentration change (deltaS/S) was highly sensitive to k in the deltaP/P range between 0% and -40%, causing a marked increase in COD residual concentration.
Department of Bio-Industrial Mechatronics Engineering, National Chung Hsing University, Taichung City, Taiwan, ROC.
Ting-Hsun
TH
Hsiao
Ju-Sheng
JS
Huang
Yu-I
YI
Huang
D000003:Abattoirs; D000818:Animals; D019149:Bioreactors; D003198:Computer Simulation; D007700:Kinetics; D008956:Models, Chemical; D010100:Oxygen / Q000737:chemistry; D011200:Poultry; D012722:Sewage / Q000737:chemistry*; D018505:Waste Management / Q000379:methods*
D012722:Sewage; D010100:Oxygen