An empirical model for COD removal in a biological aerated filter （BAF） in the presence of 2,4,6-trinitrophenol （TNP） was developed, which related effluent COD to influent COD or hydraulic loading rate along the b...An empirical model for COD removal in a biological aerated filter （BAF） in the presence of 2,4,6-trinitrophenol （TNP） was developed, which related effluent COD to influent COD or hydraulic loading rate along the bed height. The overall reaction rate for substrate biodegradation could be described as pseudo first order. The experimental data of COD removal against reactor height were used to calculate the parameters in the empirical model. The COD concentration at different reactor height was expressed as a function of influent COD concentration and hydraulic loading rate, ln（C0/C）=0.124H/QC0^0.77 and ln（C/C0）=-5.63H/L^0.94, respectively, under the experimental condition. The models may be used to predict the COD removal profiles along the reactor height at different hydraulic loading rates and influent COD concentration for design, selection and sizing of BAF.展开更多
According to a great deal of experimental findings and theoretical analysis, when the COD of inlet is 1 000-1 200 mg/L, NH3--N is 200~250 mg/L, the periodic time of operation is 24 h, the aeration time is 16 h and the...According to a great deal of experimental findings and theoretical analysis, when the COD of inlet is 1 000-1 200 mg/L, NH3--N is 200~250 mg/L, the periodic time of operation is 24 h, the aeration time is 16 h and the sludge density is 5 000-7 000 mg/L, COD of outlet is 150-200 mg/L, NH3--N is less than 25 mg/L, the volume load of COD and NH3--N remove 0.50 and 0.12 kg/（m3od） respectively. Meanwhile, studied the influence of various crafts parameter change on the treating effect and absorbing the yielding water of the SBR reactor with pulverized coal ash for improving the removing effect of COD and chromaticity further.展开更多
Wastewater from the production of cellulosic ethanol was treated by the processes of internal micro-electrolysis method ＋ABR＋UASB ＋MBR. The results of running indicated that, when COD is 12000 mg/L and HRT of UASB ...Wastewater from the production of cellulosic ethanol was treated by the processes of internal micro-electrolysis method ＋ABR＋UASB ＋MBR. The results of running indicated that, when COD is 12000 mg/L and HRT of UASB is 48 h, the COD removal rate reaches 72% and HRT of MBR is 20 h, COD removal rate is between 80.8% and 87.5%. The effluent COD concentration stabilized at 301- 537 mg/L, it indicates that the MBR system has a strong ability to resist impact load.展开更多
基金Supported by Innovation Grant for Graduate of Jiangsu Province (AD20246)
文摘An empirical model for COD removal in a biological aerated filter （BAF） in the presence of 2,4,6-trinitrophenol （TNP） was developed, which related effluent COD to influent COD or hydraulic loading rate along the bed height. The overall reaction rate for substrate biodegradation could be described as pseudo first order. The experimental data of COD removal against reactor height were used to calculate the parameters in the empirical model. The COD concentration at different reactor height was expressed as a function of influent COD concentration and hydraulic loading rate, ln（C0/C）=0.124H/QC0^0.77 and ln（C/C0）=-5.63H/L^0.94, respectively, under the experimental condition. The models may be used to predict the COD removal profiles along the reactor height at different hydraulic loading rates and influent COD concentration for design, selection and sizing of BAF.
文摘According to a great deal of experimental findings and theoretical analysis, when the COD of inlet is 1 000-1 200 mg/L, NH3--N is 200~250 mg/L, the periodic time of operation is 24 h, the aeration time is 16 h and the sludge density is 5 000-7 000 mg/L, COD of outlet is 150-200 mg/L, NH3--N is less than 25 mg/L, the volume load of COD and NH3--N remove 0.50 and 0.12 kg/（m3od） respectively. Meanwhile, studied the influence of various crafts parameter change on the treating effect and absorbing the yielding water of the SBR reactor with pulverized coal ash for improving the removing effect of COD and chromaticity further.
文摘Wastewater from the production of cellulosic ethanol was treated by the processes of internal micro-electrolysis method ＋ABR＋UASB ＋MBR. The results of running indicated that, when COD is 12000 mg/L and HRT of UASB is 48 h, the COD removal rate reaches 72% and HRT of MBR is 20 h, COD removal rate is between 80.8% and 87.5%. The effluent COD concentration stabilized at 301- 537 mg/L, it indicates that the MBR system has a strong ability to resist impact load.
