Optimal Denitrification Parameters of Aerobic Granular Sludge for Treating Simulated Wastewater
This paper investigated the denitrification performances of aerobic granular sludge(AGS)for treating simulated wastewater with the ratio of carbon to nitrogen of 5.The effects of sludge concentration,exogenous carbon source dosage and mass proportion of autotrophic AGS on the removal efficiency of total inorganic nitrogen(TIN)were explored by single factor experiments,and the suitable range of each influencing factor was determined as follows:sludge concentration in the range of 4000～6000 mg/L,exogenous carbon source concentration in the range of 100～200 mg/L,and the mass proportion of seed autotrophic AGS in the range of 75％～25％.The response surface method was employed to analyze the influence of each factor on TIN removal efficiency and to determine the optimal operational parameters.The significant of influencing factors in descending order was as follows:dosage of exogenous carbon source,sludge concentration and mass proportion of autotrophic AGS.The optimal operational parameters for nitrogen removal were as follows:sludge concentration of 4957.22 mg/L,exogenous carbon source dosage of 200 mg/L and autotrophic AGS mass proportion of 57.78％,and the predicted TIN removal efficiency was 94.06％.
aerobic granular sludgecarbon to nitrogen ratiosludge concentrationcarbon sourceseed sludge
万方数据
维普
