The cultivation of aerobic granules in sequencing batch reactor for the biodegradation of p-cresol was studied.The reactor was started with 100 mg/L of p-cresol.Aerobic granules first appeared within one month of star...The cultivation of aerobic granules in sequencing batch reactor for the biodegradation of p-cresol was studied.The reactor was started with 100 mg/L of p-cresol.Aerobic granules first appeared within one month of start up.The granules were large and strong and had a compact structure.The diameter of stable granules was in the range of 1-5 mm.The integrity coefficient and granules density was found to be 96%and 1046 kg/m3,raspectively,The settling velocity of granules was found to be in the range of 2×10^-2-6×10^-7 m/sec.The aerobic granules were able to degrade p-cresol upto 800 mg/L at a removal efficiency of 88%.Specific p-cresol degradation rate in aerobic granules followed Haldane model for substrate inhibition,High specific p-cresol degradation rate up to 0,96 g pcresol/(g VSS.day)were sustained upto p-cresol concentration of 400 mg/L,Higher removal efficiency,good settling characteristics of aerobic granules,makes sequencing batch reactor suitable for erLhaneing the microorganism potential for biodegradation of inhibitory compounds.展开更多
基金supported by UP Council of Science and Technology(UPCST),Uttar Pradesh,India
文摘The cultivation of aerobic granules in sequencing batch reactor for the biodegradation of p-cresol was studied.The reactor was started with 100 mg/L of p-cresol.Aerobic granules first appeared within one month of start up.The granules were large and strong and had a compact structure.The diameter of stable granules was in the range of 1-5 mm.The integrity coefficient and granules density was found to be 96%and 1046 kg/m3,raspectively,The settling velocity of granules was found to be in the range of 2×10^-2-6×10^-7 m/sec.The aerobic granules were able to degrade p-cresol upto 800 mg/L at a removal efficiency of 88%.Specific p-cresol degradation rate in aerobic granules followed Haldane model for substrate inhibition,High specific p-cresol degradation rate up to 0,96 g pcresol/(g VSS.day)were sustained upto p-cresol concentration of 400 mg/L,Higher removal efficiency,good settling characteristics of aerobic granules,makes sequencing batch reactor suitable for erLhaneing the microorganism potential for biodegradation of inhibitory compounds.
