A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Palm oil mill effluent treatment—liquid-solid separation with dissolved air flotation
AbstractThis is a second report on the treatment of palm oil mill effluent (POME) using liquid-solid separation, following experimental research studies conducted at the Environmental Engineering Laboratory, National University of Singapore. A laboratory-scale dissolved air flotation (DAF) unit was constructed and used to assist liquid-solid separation in POME treatment. DAF operating parameters: pressure vessel efficiency, total suspended solids loading rate, surface loading rate, air/suspended solids ratio and flocculation requirements were investigated. Compared to its solubility in potable water, air's solubility in treated POME, used as recycle water for the pressure vessel, was markedly lower. Higher pressures had to be used to increase the input of air. This, fortunately, also resulted in smaller air bubbles which improved liquid-solid separation. Increasing the total suspended solids loading rate to the DAF adversely affected the quality of the effluent. A distinct deterioration in effluent quality occurred when the total suspended solids loading rate exceeded 1650 kg m−2h−1. Surface loading rate data suggested that 2 m3 m−2ht-1 should not be exceeded. This was very low for DAF loading rate design. In addition to this, very large recycle ratios (recycle flow/influent flow) had to be used to achieve the desired air/suspended solids ratios. Such high recycle ratios may impose both practical and economic constraints on field applications of the DAF.
Palm oil mill effluent treatment—liquid-solid separation with dissolved air flotation
AbstractThis is a second report on the treatment of palm oil mill effluent (POME) using liquid-solid separation, following experimental research studies conducted at the Environmental Engineering Laboratory, National University of Singapore. A laboratory-scale dissolved air flotation (DAF) unit was constructed and used to assist liquid-solid separation in POME treatment. DAF operating parameters: pressure vessel efficiency, total suspended solids loading rate, surface loading rate, air/suspended solids ratio and flocculation requirements were investigated. Compared to its solubility in potable water, air's solubility in treated POME, used as recycle water for the pressure vessel, was markedly lower. Higher pressures had to be used to increase the input of air. This, fortunately, also resulted in smaller air bubbles which improved liquid-solid separation. Increasing the total suspended solids loading rate to the DAF adversely affected the quality of the effluent. A distinct deterioration in effluent quality occurred when the total suspended solids loading rate exceeded 1650 kg m−2h−1. Surface loading rate data suggested that 2 m3 m−2ht-1 should not be exceeded. This was very low for DAF loading rate design. In addition to this, very large recycle ratios (recycle flow/influent flow) had to be used to achieve the desired air/suspended solids ratios. Such high recycle ratios may impose both practical and economic constraints on field applications of the DAF.
Palm oil mill effluent treatment—liquid-solid separation with dissolved air flotation
Ng, W.J. (author) / Goh, Anthony C.C. (author) / Tay, J.H. (author)
Biological Wastes ; 25 ; 257-268
1988-02-08
12 pages
Article (Journal)
Electronic Resource
English
Foam Flotation in Rolling Mill Effluent Treatment
| British Library Conference Proceedings | 1993
Aerobic treatment of palm oil mill effluent
| Online Contents | 2007
Biological treatment of palm oil mill effluent using Trichoderma viride
| Elsevier | 1988
Plywood mill water system closure by dissolved air flotation treatment
| British Library Conference Proceedings | 1999
Phytoremediation Potential of Palm Oil Mill Effluent by Constructed Wetland Treatment
| DOAJ | 2017