(424a) Development of a Hybrid System to Improve the Anti-Fouling Performance of the Uf Membrane during the Specific Industrial Wastewater Treatment

Various foulants present in the industrial
wastewater and affect the UF membrane filtration performance. To improve the UF
membrane anti-fouling performance, it is important to get rid of the major
foulants before the UF membrane filtration. In this study, an UF membrane which
was the Hyflux newly developed
UF Kristal 600 membrane was
applied to three kinds of
industry wastewater: the pulp and paper wastewater, the second effluent of
industrial water and the mixture of sea water and biological wastewater. The
Characteristics of these industrial wastewaters will be given during the
presentation.

The bacterial, organic matter and
multivalent ions were the main foulants presented in these wastewaters,
different in concentrations. As
a result, this wastewater exhibited serious fouling tendency. The objectives of this study were 1) to filtrate the wastewater by means of the
Hyflux newly developed UF
Kristal 600 membranes and to
specify the main foulants during the filtration, 2) to optimize
the operating parameters to provide an efficient filtration process, and 3) to
develop a hybrid system to prevent the high membrane fouling tendency and keep
the UF membrane perform better anti-fouling performance.

To achieve these targets, a
pilot testing system was built on-site, and the membrane fouling studied was
reported in this paper. It was
found that bio-fouling and organic fouling were the main factors to affect the
cake layer formation during the UF filtration process. To prevent this kind of
fouling action occurred, the UF operating parameters were optimized and a
hybrid system was set up. The foulants were removed step by step during the
hybrid system and the whole system performed to produce quality water to the RO
system at a high flow rate. It has been proved that a right filtration system
could keep the UF membrane exhibit higher filtration performance constantly.