Effect of physical and Chemical Pretreatment on Palm Oil Mill Effluent Digestion in an Up-flow Anaerobic Sludge Fixed Film Bioreactor

سال انتشار: 1385
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 2,069

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شناسه ملی سند علمی:

ICCE07_602

تاریخ نمایه سازی: 29 دی 1384

چکیده مقاله:

An up-flow anaerobic sludge fixed film (UASFF) bioreactor was to treat the pretreated palm oil mill effluent (POME) . In physical pretreatment, POME was pre-settled for 2h and the supernatant was fed into the reactor. In chemical pretreatment , optimum dosages of cationic and anionic polymers were used. Experiments of pretreated POME digestion were conducted based on a central composite face – centered (CCFD) with two independent operating variables, feed flow rate (QF) and up-flow velocity (Vup) . The operating variables were varied to cover a wide range of organic loading rate (OLR) from 3.8 to 29 g COD /l.d Four dependent parameters were measured as response factors. These parameters were total COD (TOCD) removal, effluent total volatile fatty acid (TVFA), effluent bicarbonate alkalinity (BA), and methane yield (YM) . Associate stable TCOD removal efficiency of 83.5% was achieved at the highest QF (3031 l/Department, corresponding to OLR of 26g COD/ld) for pre-settle POME whereas only 62.2% TCOD removal was achieved with chemically pretreated POME at QF of 7.636 l.d (corresponding to OLR of 29 g COD/l.d) and that too was coupled with prosess instability . The highest level of yield was 0.34 and 0.33 for pre-settled and chemically pretreated POME , respectively , where QF and Vup were 1.01 and 0.2 m/h, respectively . The obtained results provided valuable information about interrelations of equality and process parameters at various operating conditions and also showed effects of suspended solids on the reactor performance.

کلیدواژه ها:

POME ، Pretreatment ، UADFF reactor ، Central composite face- centred design (CCFD)

نویسندگان

A.A.L.Zinatizadeh

School of Chemical Engineering Campus, University Sains Malaysia

A.R.M.Mohamed

professor

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