Treatment Of High Strength Chemical Industry Wastewater Using Moving Bed Biofilm Reactor (MBBR) and Powdered Activated Carbon (PAC) Technology
A new Waste Recycling Facility (WRF) was created at the Sasol coal to liquids facility in Secunda, South Africa with a wastewater treatment system that includes equipment to treat the wastewater and storm water through several steps including equalization, oil removal (gravity separation and dissolved air flotation), lime neutralization/metals precipitation, back-neutralization, fixed-film biological treatment, powdered carbon activated sludge biological treatment, sand filtration and chemical oxidation. It is a unique facility believed to be a first of kind. A pilot study was performed on the fixed film biological treatment unit using the AnoxKaldnes Moving Bed Biofilm Reactor (MBBR) technology for pre-treatment of the wastewater followed by powdered activated carbon (PAC) for additional removal of organic material & nitrification. The start up of the MBBR system was in August 2005 and the waste recycling facility has met beneficial operations since December 2005.