Laboratory-scale sequencing batch reactors, operated under aerobic and anoxic conditions, for removal of organic matter and nitrogen from concentrated sludge from a shrimp facility were
operated by Boopathy et al. (2007) and Fontenot et al. (2007). They showed that at a hydraulic retention time of 8 days, a 74% reduction in organic matter and a total reduction of nitrogen could be achieved with this kind a treatment scheme.