| Title |
Fouling Factors in Submerged Membrane Bioreactor ( 1 ) |
| Authors |
신항식(Hang Sik Shin),안현희(Hyun Hee An),강석태(Seok Tae Kang) |
| Abstract |
Among several factors related to the fouling of the submerged membrane bioreactor (SMBR) such as suction pressure, backwash cycle, MLSS, and ECP (exocellular polymer). ECP which is main component of activated sludge flocs has been reported as a major factor on fouling because it increases of viscosity in activated sludge and accumulates on the surface of membrane. In this study, the cake and plugging resistances caused by MLSS and ECP were measured to identify the influence of ECP on fouling quantitatively. It was found that the cake resistance by ECP occupied over 90% of total resistance. The ratio of protein-like ECP (ECPp) to carbohydrate-like ECP (ECPc) was an important fator to increase the cake resistance. In the operation of SMBR, it was needed to monitor the concentration of protein-like ECP and total ECP. |