Author/Authors :
Zinatizadeh، A.A.L نويسنده Material and Energy Research Center, P. O. BOX 1415-4777, Tehran, Iran , , Salamatinia، B نويسنده School of Chemical Engineering, Engineering Campus, University Sains Malaysia, Malaysia , , Zinatizadeh، S.L نويسنده School of Natural Resources, Science and Researches Campus, Ahvaz Azad University, Pasdaran Blvd., Ahvaz , , Mohamed، C A.R نويسنده Marine Ecosystem Research Centre (EKOMAR), Faculty of Science & Technology, University Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia , , Hasnain Isa، M نويسنده School of Civil Engineering, Engineering Campus, University Sains Malaysia, Malaysia ,
Abstract :
The effect of organic loading rate (OLR) provided by hydraulic retention time (HRT) and
influent chemical oxygen demand (CODin) on the performance of an up-flow anaerobic sludge fixed film
(UASFF) bioreactor treating palm oil mill effluent (POME) was studied. Anaerobic digestion of POME
was modeled and analyzed with two variables i.e. HRT and CODin. Experiments were conducted based
on a general factorial design and analyzed using response surface methodology (RSM). The region of
exploration for digestion of POME was taken as the area enclosed by HRT (1 to 6 days) and CODin (5260
to 34725 mg/L) boundaries. A simultaneous increase of the variables determined a decrease of COD
removal efficiency, SRT and SRF and an increase of COD removal rate, VFA/Alk., CO2 fraction in
biogas, methane production rate. The best COD removal rate for POME treatment in an anaerobic
hybrid reactor has obtained at an OLR of 17.6 g COD/l.d while it was at 26.21 g COD/l.d (Corresponds
to COD
in of 26210 mg COD/l and HRT of 1 day) in the present study. Minimum and maximum SRT values
obtained were 16 and 1904 days at OLR of 34.73 and 0.88 g COD/l.d, respectively. The present study
provides valuable information about interrelations of quality and process parameters at different values
of the operating variables.
