The Problem: A landfill located in Texas was experiencing high concentrations of ammonia in the leachate from their domestic landfill. Compliance standards were becoming more stringent at the same time ammonia and BOD levels in the leachate stream were increasing in concentration.
The Solution: After on‐site testing of a bioFAS High Rate Bio Filter (HRBF) process for a period of 1.5 years, the landfill’s consultant explored the upgrade of the bioFAS HRBF process and looked to eliminate the buildup of struvite on the looped chord biofilm media. As a result of the engineering study and a series of in‐house models to simulate the process, bioprocessH2O supplied a two‐stage bioFAS Moving Bed Biofilm Reactor (MBBR) biological treatment process designed for BOD reduction and nitrification of ammonia. The continuous movement of the biofilm carriers sloughed off dead bacteria and eliminated any build‐up of struvite. The bioFAS attached growth fixed film process upgrade allowed the landfill to meet the new regulations while at the same time expand the capacity of the landfill to open up additional cells.
Status/Results: The bioFAS MBBR System effectively biodegrades the BOD and nitrifies ammonia to compliance standards for direct discharge.