Further steps in the standardization of BOD5/COD ratio as a biological stability index for MSW

The results obtained demonstrate: the apparent adequacy of a short contact time (2 h), which is highly preferable and would speed up the procedure; a low liquid to solid ratio (5 l/kgTS) which is recommended as a water saving strategy; the applicability of centrifugation of the eluate prior to analysis which is faster that filtration method.