چكيده لاتين :
Feasibility of the anaerobic baffled reactor process was investigated for the treatment of wheat flour
starch wastewater. After removal of suspended solids by simple gravity settling, starch wastewater was
used as a feed. Start-up of a reactor (with a volume of 13.5 L and five compartments) with diluted feed
of approximately 4500 mg/L chemical oxygen demand was accomplished in about 9 weeks using seed
sludge from anaerobic digester of municipal wastewater treatment plant. The reactor with hydraulic
retention time of 72h at 35°C and initial organic loading rate of 1.2 kgCOD/m3.d showed 61% COD
removal efficiency. The best performance of reactor was observed with an organic loading rate of 2.5
kgCOD/m3.d or hydraulic retention time of 2.45 d and the COD conversion of 67% was achieved. The
system also showed very high solids retention with effluent suspended solids concentration of about 50
mg/L for most organic and hydraulic loadings studied. Based on these observations, the ABR process
has potential to treat food industrial wastewater as a pretreatment and is applicable for extreme
environmental conditions.
