Liquefied dimethyl ether based multi-stage extraction for high efficient oil recovery from spent bleaching clay

Dong, Zhang; Huang, Ying; Oshita, Kazuyuki; Takaoka, Masaki; Wang, Quan; Sheng, Changdong; Lin, Zizeng

doi:10.1016/j.wasman.2021.09.033

Cited by 5 publications

(4 citation statements)

References 35 publications

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“…However, it resulted in better extraction performance with the increment of DME amount. Similar results are noted in the literature for process optimization of lipid extraction using the DME technique, in which the lipid content decreased at high velocity as there was less time for DME penetration, thus preventing extraction equilibrium. − …”

Section: Resultssupporting

confidence: 86%

“…A reduction in fat ball size and velocity of DME had a positive influence on lipid yield. However, a larger fat ball size and higher DME velocity contributed to the lower yield of lipids due to the limiting effect of mass transfer, which prevents contact between DME and the lipids. , It has been reported that the lipid yield increases almost linearly with a decrease in sample diameter (<3.7 mm) due to the increased contact area between the DME and sludge ball sample …”

Section: Resultsmentioning

confidence: 99%

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Effective Lipid Extraction from Fat Balls Using Liquefied Dimethyl Ether: Process Optimization with a Box–Behnken Design

Rizkianto,

Oshita,

Homma

et al. 2024

ACS Omega

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In recent years, lipids reused from urban wastewater materials have come to prominence as possible raw materials for biodiesel production. The present work investigated liquefied dimethyl ether (DME) for the lipid extraction of fat balls from sewage pumping stations. A response surface methodology (RSM) based on a Box−Behnken design (BBD) was utilized to optimize DME extraction parameters (sample size, velocity of liquefied DME, and DME/sample ratio). The maximum lipid yield was 65.2% under optimal DME extraction conditions (sample size 1 mm, velocity of liquefied DME 3.3 m/h, and DME/sample ratio 80 mL/g). Under the optimum conditions, the DME technique exhibited higher lipid recovery than that of mechanical shaking extraction (49.0%) or Soxhlet extraction (62.0%). The extracted lipids were converted into biodiesel, resulting in an approximately 35.2−46.2% biodiesel yield. Furthermore, the fatty acid methyl ester composition of the extracted lipids was characterized. These significant findings highlight the promising potential of fat balls as sustainable biodiesel feedstocks and provide valuable insight that will aid the development of better technology for lipid extraction.

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Effective Lipid Extraction from Fat Balls Using Liquefied Dimethyl Ether: Process Optimization with a Box–Behnken Design

Rizkianto,

Oshita,

Homma

et al. 2024

ACS Omega

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“…Proper treatment of this oily sludge is a major challenge with current soil pollution control practices. Currently, various treatment technologies are available including solvent extraction techniques (Zhang et al 2021), elution (Ren et al 2022), pyrolysis (Chu et al 2021), biodegradation (Cerqueira et al 2011;Chen et al 2022), and oxidation (Mora et al 2020). The elution method is suitable for oily sludge that is rich in light chemical components, whereas the pyrolysis method is appropriate for oily sludge with high oil content.…”

Section: Introductionmentioning

confidence: 99%

“…Nezhdbahadori et al (2018) used the response surface design to determine the optimal conditions of toluene extraction for the recovery of petroleum hydrocarbons from oily sludge and achieved 37.2% recovery. The effect of extraction and separation parameters of petroleum hydrocarbons from oily sludge using dimethyl ether was investigated by Zhang et al (2021) and demonstrated that a 70.8% extraction yield was achieved using the optimum conditions (25 °C reaction temperature, 30 min extraction time, and 600 rpm stirring rate). Yasser et al (2021) compared the effects of acetone, chloroform, dichloromethane, and nhexane for hydrocarbon extraction from oily sludge in petroleum storage tanks.…”

Section: Introductionmentioning

confidence: 99%

Quantitative determination of petroleum hydrocarbons in oily sludge following efficient n-heptane separation

Zhang¹,

Ma²,

Qin³

et al. 2023

BioRes

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Accurate analysis of the main chemical components of oil-bearing sludge is an important prerequisite for effective soil remediation and resource reuse. However, precise analysis of the extract components is difficult to achieve because of the mutual interference of saturates, aromatics, and resins, collectively called SAR, and asphaltene that are introduced during chloroform extraction. In this study, SAR was efficiently extracted using n-heptane, while asphaltene components were retained in soil because of their insolubility in n-heptane. The maximum yield of SAR extraction was 27.0%, indicating an increase of 1.75% compared to chloroform extraction. The extracted SAR components were separated by chromatography and the main structural units and components were analyzed. The results show that saturates, aromatics, and resins have a single component, a high content of major components, and contain fewer impurities using n-heptane extraction. Moreover, the solubility of asphaltene was inhibited during the effective extraction of SAR components with n-heptane and did not influence the subsequent analysis of SAR component. Efficient SAR extraction, accurate SAR component analysis, and high efficiency asphaltene separation was achieved using n-heptane-extraction-assisted pyrolysis. This provides a new method for the component analysis of oily sludge and promotes its efficient separation.

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Recovery of paraffin from the filter cake used for paraffin decoloration in the Fischer-Tropsch synthetic process

Wang

Jiao

Zhang

et al. 2022

Fuel

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Liquefied dimethyl ether based multi-stage extraction for high efficient oil recovery from spent bleaching clay

Cited by 5 publications

References 35 publications

Effective Lipid Extraction from Fat Balls Using Liquefied Dimethyl Ether: Process Optimization with a Box–Behnken Design

Effective Lipid Extraction from Fat Balls Using Liquefied Dimethyl Ether: Process Optimization with a Box–Behnken Design

Quantitative determination of petroleum hydrocarbons in oily sludge following efficient n-heptane separation

Recovery of paraffin from the filter cake used for paraffin decoloration in the Fischer-Tropsch synthetic process

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