The primary (physico-chemical) treatment of the
potato-chips wastewater was run according to Kerri
et. al. (1995) by using 1% of alum and left to settledown
for 15 min. then two liters of the wastewater
has been transferred to clean glass-jar. The second
(biological) treatment; one liter of the primary
treated wastewater was run according to the
introduced new technique (SD-BIOMIX). Ten gm
of biomass of A. terreus or R. sexualis, or
municipal sludge or non-composted or kinds of
composted sawdust (by natural flora of it, natural
flora plus A. terreus or natural flora plus R.
sexualis) or 10 ml of C157 (bio-product of
American water tech. Co.) or 10 ml of EM (bioproduct
of Japanes water Tech. Co.) was mixed,
separately, with one liter of primary treated
wastewater, in 2 liters steering glass-jar under
aerobic conditions for 4 or 8 h. at 25 °C. The
wastewater was left to settle down for ½ h, the
precipitated sludge amount was measured, every 5
min.,