Supporting information for the manuscript TENT-2014-0295 Internal carbon source from sludge pretreated by microwave-H2O2 for nutrient removal in A2/O-MBRs Rongle Xu, Qing Zhang, Juan Tong, Yuansong Wei, Yaobo Fan * Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 *Corresponding author. E-mail: ybfan@rcees.ac.cn Introduction Table S1 Comparison of the sludge pretreatment for internal carbon sources carbon sources Sludge pretreatment Parameters Carbon source type Configuration Conclusion Reference 1L sludge sonicated under Sludge reduction, ultrasonic 600W for 1h once a day, Solubilized sludge MBR,8.5L effluent quality [1] returned to MBR tank slightly deteriorated. Disintegrated with a Higher denitrification Mechanically deflaker, Solubilized sludge rate and more [2] —— disintegration for 2-5min. phosphate release Fix pH of 11 for 3h, Sludge reduction, no Alkaline and treatment with significant Solubilized sludge MBR, 28L. [3] ozonation for 26.6-35.5min deterioration in ozone sludge 1.44Ld-1 effluent quality. Supernatant to Sludge reduction, no Thermo Fix pH of 11(NaOH), anoxic; digested A2/O-MBR, improvement or chemical [4] temperature of 3 h sludge to anaerobic 83.4L deterioration in digestion basin nutrient removal Fermentation Improved TN,TP Fix pH of 10, for 72h, liquids recycled 2-step alkaline removal efficiency 2.5 days SRT for into anaerobic A2/O, 115L [5] fermentation 11% and 16%, fermentation at basin, wastewater respectively into anoxic basin. Alkaline pH 10, gamma-ray TN removal efficiency hydrolysis and Solubilized sludge A/O, 30L [6] irradiation of 20kGy improved 36.8 gamma-ray Supernatant after Improved TN,TP Alkaline recovery removal efficiency pH 10, for 8 days SBR, 4L [7, 8] fermentation phosphorus and 19.9% and 48.9%, nitrogen by MAP respectively
Supporting information for the manuscript TENT-2014-0295 Internal carbon source from sludge pretreated by microwave-H2O2 for nutrient removal in A2/O-MBRs Rongle Xu, Qing Zhang, Juan Tong, Yuansong Wei, Yaobo Fan * Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 *Corresponding author. E-mail: ybfan@rcees.ac.cn Introduction Table S1 Comparison of the sludge pretreatment for internal carbon sources carbon sources Sludge pretreatment Parameters Carbon source type Configuration Conclusion Reference ultrasonic 1L sludge sonicated under 600W for 1h once a day, returned to MBR tank Solubilized sludge MBR,8.5L Sludge reduction, effluent quality slightly deteriorated. [1] Mechanically disintegration Disintegrated with a deflaker, for 2-5min. Solubilized sludge —— Higher denitrification rate and more phosphate release [2] Alkaline and ozonation Fix pH of 11 for 3h, treatment with for 26.6-35.5min ozone sludge 1.44Ld-1 Solubilized sludge MBR, 28L. Sludge reduction, no significant deterioration in effluent quality. [3] Thermo chemical digestion Fix pH of 11(NaOH), temperature of 3 h Supernatant to anoxic; digested sludge to anaerobic basin A2/O-MBR, 83.4L Sludge reduction, no improvement or deterioration in nutrient removal [4] 2-step alkaline fermentation Fix pH of 10, for 72h, 2.5 days SRT for fermentation at Fermentation liquids recycled into anaerobic basin, wastewater into anoxic basin. A2/O, 115L Improved TN,TP removal efficiency 11% and 16%, respectively [5] Alkaline hydrolysis and gamma-ray pH 10, gamma-ray irradiation of 20kGy Solubilized sludge A/O, 30L TN removal efficiency improved 36.8 [6] Alkaline fermentation pH 10, for 8 days Supernatant after recovery phosphorus and nitrogen by MAP SBR, 4L Improved TN,TP removal efficiency 19.9% and 48.9%, respectively [7, 8]
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