Super-Energy-Saving Dewatering Method for High-Specific-Surface-Area Fuels by Using Dimethyl Ether

Kanda, Hideki

doi:10.1260/026361708787548792

Cited by 18 publications

(9 citation statements)

References 4 publications

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“…Based on the characteristics of DME mentioned above, Kanda reported that liquefied DME can be used as a solvent to extract water from high-water content solids [23,24],including low rank coals [23,[25][26][27], plants, foods [24,28], sewage sludge [29], and polymers [30]. Similarly, Catchpole et al reported the extraction of pungent components from low-water content chili, black pepper, and ginger by liquefied DME [31].Sato and Matsumura reported extraction of phenol in water phase by liquefied DME [32].Thereafter, Kanda [33] and Catchpole et al [34] applied the water extraction method for the extraction of oily substances fromhigh-water content solids.…”

Section: Introductionmentioning

confidence: 99%

Extraction of carotenoids and lipids from algae by supercritical CO2 and subcritical dimethyl ether

Goto

Kanda

Diono

et al. 2015

The Journal of Supercritical Fluids

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165

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Algae contain lipids and functional compounds such as carotenoids. Especially, micoalgae are recently focused as a source of biofuel. To extract these components, organic solvent or supercritical carbon dioxide have been used. We have been developing wet extraction process using liquefied (subcritical) dimethyl ether (DME) as solvent at around 0.59MPa. The extraction process usually requires energy consuming drying and grinding process as in the case of supercritical CO 2. We have applied

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Section: Introductionmentioning

confidence: 99%

Extraction of carotenoids and lipids from algae by supercritical CO2 and subcritical dimethyl ether

Goto

Kanda

Diono

et al. 2015

The Journal of Supercritical Fluids

Self Cite

165

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“…In this study, we performed a bench-scale experiment developed previously for removing water or oil from several materials. The configuration of this experiment has been described in previous papers (Kanda, 2008;Kanda and Makino, 2009;Kanda et al, 2010). Theoretically, the energy required for dewatering 1 kg of water by this method is 1109 kJ/kg water .…”

Section: Methodsmentioning

confidence: 99%

Deodorization and Dewatering of Biosolids by Using Dimethyl Ether

Kanda

Morita²,

Makino

et al. 2011

Water Environment Research

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We proposed a method for the deodorising and dewatering of biosolids. In the proposed method, liquefied dimethyl ether (DME) was used as an extractant for odorous components and water. We developed a bench‐scale experiment to almost completely deodorize and dewater biosolids by using liquefied DME at room temperature. The deodorized and dewatered biosolids have sufficient caloric density and can be used as a carbon neutral fuel.

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“…Features of the sludge that underwent DME dewatering to form the dewatered sludge cake were evaluated: volatile total solid (VTS) content and CHN and other metal content were measured. VTS, fixed total solid (FTS) content, and CHN content were analyzed using Japan Industrial Standard predetermined methods (Japan Industrial Standard, 1992, 1997, 2008. Other metal contents were measured by ICP-AES.…”

Section: Figure 2 Schema Of Dme Flow-type Experimental Apparatusmentioning

confidence: 99%

Sewage Sludge Dewatering Process Using Liquefied Dimethyl Ether as Solid Fuel

Oshita¹,

Takaoka²,

Nakajima³

et al. 2010

proc water environ fed

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Dewatering of sewage sludge is an essential step required to obtain a dry solid that can be used as a fuel. We, therefore, focused on a method to remove water from sewage sludge by using dimethyl ether (DME) as an extractant, which liquefies under moderate pressures at room temperature; it is primarily applied to dewatering low-grade coal with high water content. This study evaluated the applicability of the DME dewatering method to sewage sludge cakes by using a DME flow-type experimental apparatus.It was found that sludge cakes could be dried absolutely under a linear velocity of 0.48 m/h and a liquid DME-sludge ratio of over 115 mL/g. It became clear that a high dewatering ratio was achieved by increasing the liquefied DME/sludge ratio and lowering the liquefied DME linear velocity.As the liquefied DME/sludge ratio increased, the content of volatile total solid (VTS), fixed total solid (FTS), Hydrogen, Nitrogen and other metal in dewatered sludge did not decreased, but carbon content in dewatered sludge decreased slightly. And the total organic carbon (TOC) concentration in separated liquid increased significantly. Therefore, when DME dewatering process is introduced to existing wastewater treatment plant, it should be necessary to pay attention to organic load of TOC in the separated liquid Finally, we estimated the input energy per kg of H 2 O removed from the sludge: Es, in the both the DME dewatering method and the conventional drying method. In the calculation result, Es of DME dewatering process is a third of Es of direct drying process as conventional method.

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Super-Energy-Saving Dewatering Method for High-Specific-Surface-Area Fuels by Using Dimethyl Ether

Cited by 18 publications

References 4 publications

Extraction of carotenoids and lipids from algae by supercritical CO2 and subcritical dimethyl ether

Extraction of carotenoids and lipids from algae by supercritical CO2 and subcritical dimethyl ether

Deodorization and Dewatering of Biosolids by Using Dimethyl Ether

Sewage Sludge Dewatering Process Using Liquefied Dimethyl Ether as Solid Fuel

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