The anaerobic treatment of the wastewaters dischargedby raw milk analysis laboratories was successfully carriedout in spite of the various toxic compounds
present. Continuous lab-scale operation showedthat
these effluents couldbe treatedusing a high rate
anaerobic reactor. During a short periodof few weeks
it was operatedat an OLR as high as 20 kg COD/m3
d
with no inhibition effects detected. Inhibition was only
observedwhen the chemical solution was increasedmore
than 10 times its usual concentration in the whole