TY - JOUR
T1 - Modeling a combined anaerobic/anoxic oxide and rotating biological contactors process under dissolved oxygen variation by using an activated sludge-biofilm hybrid model
AU - Pai, Tzu Yi
AU - Chuang, Shun Hsing
AU - Tsai, Yung Pin
AU - Ouyang, Chaio Fuei
PY - 2004/12
Y1 - 2004/12
N2 - A hybrid model which incorporated a biofilm model into the general dynamic model was developed to predict the effluent quality of a combined activated sludge and biofilm process-Taiwan National Central University Process 1. The system was performed under three different dissolved oxygen (DO) conditions in the oxic tank, including 2.0, 1.0, and 0.5 mg/L. When the DO increased from 0.5 to 2.0 mg/L, the soluble biodegradable substrate (SS) and soluble phosphate (P O4) in the effluent were not significantly influenced. Their removal efficiencies were above 92 and 94%. Ammonia-nitrogen (N H3) removal efficiency increased from 36 to 83% and nitrate-nitrogen (NO3) increased from 1.7 to 2.9 mg/L. In biofilm, when the DO was 2.0 mg/L, the active autotrophic biomass (Z A) fraction was 15.7% (surface) to 12.9% (substratum). But when the DO was 0.5 mg/L, the ZA fraction became lower and the fraction was 6.2% (surface) to 3.5% (substratum). The fraction of active nonpoly-P heterotrophic biomass (ZH) in the biofilm did not vary significantly, the values were about 28-35%. ZI decreased as the DO increased. SS in the biofilm did not vary significantly and was maintained at about 2.0 mg/L. When DO increased, NO3 also increased, NH3 decreased from 13.1 to 1.8 mg/L in biofilm.
AB - A hybrid model which incorporated a biofilm model into the general dynamic model was developed to predict the effluent quality of a combined activated sludge and biofilm process-Taiwan National Central University Process 1. The system was performed under three different dissolved oxygen (DO) conditions in the oxic tank, including 2.0, 1.0, and 0.5 mg/L. When the DO increased from 0.5 to 2.0 mg/L, the soluble biodegradable substrate (SS) and soluble phosphate (P O4) in the effluent were not significantly influenced. Their removal efficiencies were above 92 and 94%. Ammonia-nitrogen (N H3) removal efficiency increased from 36 to 83% and nitrate-nitrogen (NO3) increased from 1.7 to 2.9 mg/L. In biofilm, when the DO was 2.0 mg/L, the active autotrophic biomass (Z A) fraction was 15.7% (surface) to 12.9% (substratum). But when the DO was 0.5 mg/L, the ZA fraction became lower and the fraction was 6.2% (surface) to 3.5% (substratum). The fraction of active nonpoly-P heterotrophic biomass (ZH) in the biofilm did not vary significantly, the values were about 28-35%. ZI decreased as the DO increased. SS in the biofilm did not vary significantly and was maintained at about 2.0 mg/L. When DO increased, NO3 also increased, NH3 decreased from 13.1 to 1.8 mg/L in biofilm.
UR - http://www.scopus.com/inward/record.url?scp=10344233701&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)0733-9372(2004)130:12(1433)
DO - 10.1061/(ASCE)0733-9372(2004)130:12(1433)
M3 - 期刊論文
AN - SCOPUS:10344233701
SN - 0733-9372
VL - 130
SP - 1433
EP - 1441
JO - Journal of Environmental Engineering
JF - Journal of Environmental Engineering
IS - 12
ER -