Publications by authors named "Lei-jun Sun"
A sequencing batch reactor (SBR) was operated with alternating anaerobic/oxic (An/O) condition to investigate the nitrogen and phosphorus removal performance of EBPR with DO=1 mg·L and the phosphorus recovery effect at extracting side stream ratio of 0, 1/4, 1/3, 1/2 anaerobic phosphorus supernatant. The removal efficiency of NH-N was found to be relatively stable during all experimental stages but effluent COD of the system during later period remained as high as 81.3 mg·L.
View Article and Find Full Text PDFTwo sequencing batch reactors (SBRs) were operated with alternating anaerobic/oxic (An/O) for 127 days to study the phosphorus removal efficiency and process performance of the EBPR under different dissolved oxygen gradient. For the reactor (R) in which DO was not controlled and measured as high as 6 mg·L during the aerobic stage, a stable phosphorus removal performance was achieved in the former 65 days during the operational period. The phosphorus removal efficiency was greater than 95.
View Article and Find Full Text PDFAn alternating anaerobic/oxic ( An/O) sequencing batch reactor (SBR) was employed to investigate the long-term inhibitory effect of free nitrous acid (FNA) on aerobic phosphorus uptake performance and variation of phosphorus uptake properties of the sludge by adding nitrite. The reactor was started up under the condition of 21-23 degrees C. The results showed that FNA had no impact on phosphate release and uptake capacities of the sludge.
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