Separation of Oil from Wastewater by Column Flotation

Li, Xiaobing; Liu, Jiongtian; Wang, Yongtian; Wang, Cun-ying; Zhou, Xiaohua

doi:10.1016/s1006-1266(07)60143-6

Cited by 59 publications

(25 citation statements)

References 14 publications

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“…Nonetheless, it is recommended to conduct further studies on oil‐water emulsion using micro separation technologies such as column flotation (Li et al . ), dissolved air flotation (Cheung and Henley ) and hydrophobic‐oleophilic natural fibers filtration (Huang and Lim ) to increase the oil recovery obtained using the HYSASE process.…”

Section: Resultsmentioning

confidence: 99%

“…The HYSASE process shows the capacity to be developed and improved to increase the revenue of the palm oil mill or even to increase the OER due to the high oil removal, which can be estimated as 0.61% of OPFFB. Nonetheless, it is recommended to conduct further studies on oil-water emulsion using micro separation technologies such as column flotation (Li et al 2007), dissolved air flotation (Cheung and Henley 2000) and hydrophobic-oleophilic natural fibers filtration (Huang and Lim 2006) to increase the oil recovery obtained using the HYSASE process.…”

Section: Fig 5 Triglyceride Hydrolysis Of the Vegetable Oil: (A) Pamentioning

confidence: 99%

See 1 more Smart Citation

Study on Residual Oil Recovery from Empty Fruit Bunch by Combination of Water and Steam Process

Gomez

Mokhtar

Sulaiman

et al. 2014

J Food Process Engineering

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In this study, the recovery of residual oil from the spikelet of oil palm empty fruit bunches (OPEFB) was conducted. Residual oil was present in the OPEFB due to mechanical processes such as the loading of fruit into the sterilizer cage, sterilization and threshing, in which a certain portion of the oil from the fruitlet was impregnated mainly on the surface of the spikelet rather than on the stalk of OPEFB. The highest residual oil content was found mainly in the small OPEFB (28.49 ± 5.20% dry basis). The oil extraction process was introduced as hydro solvent-assisted steam extraction, which comprises of four main steps, i.e., flooding, injection, soaking and draining. The overall process resulted in above 83% residual oil removal from the spikelet. The proposed method can be an option to be implemented in the palm oil mill because it is a chemical-free, environmentfriendly and novel process.

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Section: Resultsmentioning

confidence: 99%

Section: Fig 5 Triglyceride Hydrolysis Of the Vegetable Oil: (A) Pamentioning

confidence: 99%

Study on Residual Oil Recovery from Empty Fruit Bunch by Combination of Water and Steam Process

Gomez

Mokhtar

Sulaiman

et al. 2014

J Food Process Engineering

View full text Add to dashboard Cite

show abstract

“…Flotation as a separation technique, originally developed in mineral industry, has found great applications in other fields for the recovery of valuable end‐products such as oils , proteins , water and wastewaters remediation . During flotation, bubbles are formed by air or gas transformation within a solid/liquid suspension, the bubbles adhere to the particles to be separated carrying them at the top of the separator where they are collected .…”

Section: Methods To Induce Flotationmentioning

confidence: 99%

Flotation: A promising microalgae harvesting and dewatering technology for biofuels production

Ndikubwimana

Chang

Xiao

et al. 2016

Biotechnology Journal

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Microalgal biomass as renewable energy source is believed to be of great potential for reliable and sustainable biofuels production. However, microalgal biomass production is pinned by harvesting and dewatering stage thus hindering the developing and growing microalgae biotechnology industries. Flotation technology applied in mineral industry could be potentially applied in microalgae harvesting and dewatering, however substantial knowledge on different flotation units is essential. This paper presents an overview on different flotation units as promising cost-effective technologies for microalgae harvesting thus bestowing for further research in development and commercialization of microalgae based biofuels. Dispersed air flotation was found to be less energy consuming. Moreover, Jameson cell flotation and dispersed ozone flotation are believed to be energy efficient microalgae flotation approaches. Microalgae harvesting and dewatering by flotation is still at embryonic stage, therefore extended studies with the focus on life cycle assessment, sustainability of the flotation unit, optimization of the operating parameters using different algal species is imperative. Though there are a number of challenges in microalgae harvesting and dewatering, with well designed and developed cultivation, harvesting/dewatering, extraction and conversion technologies, progressively, microalgae technology will be of great potential for biological carbon sequestration, biofuels and biochemicals production.

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“…The mechanism of a flotation process is fundamentally the generation of small bubbles which can be achieved chemically, by direct addition of gas through porous dispersers [2], by electrolysis [3], through mechanical agitation combined with air injection [4], by direct injection through sparger [5] or by dissolution of air to water through pressure [6], depending on the flotation technique adopted. Flotation exploits the physicochemical surface properties of a substance and has high selectivity of the desired recovery particle.…”

Section: Introductionmentioning

confidence: 99%

The Recovery of Oil from Oil/Sand Slurries in a Laboratory-Scale Flotation Cell

Lau¹,

Foo²,

Poh³

2013

IJESD

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Abstract-Oil/sand slurries are found abundantly particularly at petroleum refineries. The ability to recover oil from these oil/sand slurries is an added advantage to meet the increasing need in oil consumption. Thus, this research aims to investigate the effects of temperature and pH in the recovery of oil from oil/sand slurries using the flotation technique. The critical operating temperature and optimum pH condition are determined to be at 50 o C and pH 9 respectively, whereby the maximum average oil recovered is 63.2 wt%. Oil recovery is found to be favorable at elevated temperatures due to the reduced oil viscosity which facilitates the liberation of oil from oil sands. Under alkaline conditions, negative surface charge is increased, resulting in increased disjoining pressure between the oil and sand grains which led to the improved oil recovery. Thus, the flotation process provides a promising alternative to recover oil from oil/sand slurries.

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Separation of Oil from Wastewater by Column Flotation

Cited by 59 publications

References 14 publications

Study on Residual Oil Recovery from Empty Fruit Bunch by Combination of Water and Steam Process

Study on Residual Oil Recovery from Empty Fruit Bunch by Combination of Water and Steam Process

Flotation: A promising microalgae harvesting and dewatering technology for biofuels production

The Recovery of Oil from Oil/Sand Slurries in a Laboratory-Scale Flotation Cell

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