Citation
Mohd Ali Hassan, . and Alawi Sulaiman, . and Suraini Abd-Aziz, . and Shahrakbah Yacob, . and Zainuri Busu, . and Wakisaka Minato, . and Shirai Yoshihito, . Improved anaerobic treatment of palm oil mill effluent in a semi-commercial closed digester tank with sludge recycling and appropriate feeding strategy. pp. 27-37. ISSN 1511-3701
Abstract
Anaerobic treatment of palm oil mill effluent (POME) in a semi-commercial closed digester tank with sludge recycling was studied using different feeding strategies; one fixed at every three hour and another at every six hour. The organic loading rate (OLR) was increased step-wise and stopped once inhibition on methane production occurred. The chemical oxygen demand (COD) feeding rate hydraulic retention time (HRT) OLR and sludge recycling ratio were measured. Performance was based on the COD removal efficiency and methane yield while stability was assessed in terms of total volatile fatty acids (VFA) accumulation total VFA-to-alkalinity ratio (VFA:Alk) and food-to-microorganisms ratio (F/M ratio). The feeding strategies at every three hour and six hour gave satisfactory COD removal efficiency of higher than 90 but the latter feeding strategy gave a more stable process with total VFA concentration recorded below 500 mg L-1 and VFA:Alk ratio of less than 0.3 at maximum OLR of 6.0 kgCOD m-3 d-1. The treatment period could also be extended up to 100 days without any obvious problems.
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Abstract
Anaerobic treatment of palm oil mill effluent (POME) in a semi-commercial closed digester tank with sludge recycling was studied using different feeding strategies; one fixed at every three hour and another at every six hour. The organic loading rate (OLR) was increased step-wise and stopped once inhibition on methane production occurred. The chemical oxygen demand (COD) feeding rate hydraulic retention time (HRT) OLR and sludge recycling ratio were measured. Performance was based on the COD removal efficiency and methane yield while stability was assessed in terms of total volatile fatty acids (VFA) accumulation total VFA-to-alkalinity ratio (VFA:Alk) and food-to-microorganisms ratio (F/M ratio). The feeding strategies at every three hour and six hour gave satisfactory COD removal efficiency of higher than 90 but the latter feeding strategy gave a more stable process with total VFA concentration recorded below 500 mg L-1 and VFA:Alk ratio of less than 0.3 at maximum OLR of 6.0 kgCOD m-3 d-1. The treatment period could also be extended up to 100 days without any obvious problems.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Palm oils |
| AGROVOC Term: | Pulp mill effluents |
| AGROVOC Term: | Anaerobic treatment |
| AGROVOC Term: | Experimental design |
| AGROVOC Term: | Recycling |
| AGROVOC Term: | Feeding systems |
| AGROVOC Term: | Biogas |
| AGROVOC Term: | Methane |
| AGROVOC Term: | Activated sludge |
| AGROVOC Term: | Chemical analysis (methods) |
| Geographical Term: | Malaysia |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 27 Apr 2025 23:32 |
| URI: | http://webagris.upm.edu.my/id/eprint/22774 |
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