1. Introduction
Conventional technologies for high organic load wastewater treatment include hydrolysis-contact oxidation technology, sequencing batch reactor activated sludge process (SBR), cyclic activated sludge technology (CAST), and up-flow anaerobic sludge bed/blanket (UASB) [1]. These conventional methods have long retention times and generate large amounts of residual sludge. The residual sludge is difficult to dispose and often causes serious secondary pollution issues [1].