Effect of feeding ABS particles into membrane bioreactor on membrane filtration performance
投加ABS颗粒对MBR膜过滤特性的影响

ABS was fed into MBR to disturb the formation of cake layers on membrane surfaces and to reduce membranes fouling effect.The result indicated that the optimized feed rate is 1.5 kg/m3,when using 1 mm diameter ABS particles.The MBR operating time achieves three times of the contrast test.Feeding ABS particles could effectively suppress the sludge cake layer formation rate on membrane surfaces,whose largest weight difference between the ABS feeding test and contrast test is 290 g,with a different content distribution between these two results.As ABS particles fed into MBR,the EPS concentration in sludge was also impacted.Comparing to the contrast test,the concentration of polysaccharide and protein increased by 17.2% and 8%,respectively.Sludge viscosity increased by 17.6%.The removal rates of TN and TP increased by 9.7% and 8.5%,respectively as the fine grid and particles were added into MBR.However.The results indicating fairly small influence on COD.