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Ryoko Sekifuji

Publications (8)

Pursuing Simple and Low-cost Operation for Sludge Reduction via a Self-Oxidized Reduction Process in a Field-Scale Sewage Treatment Plant

Ryoko Sekifuji, Satoru Takinami, Yukinori Harada, Masashi Watanabe & Masafumi Tateda · Journal of Scientific Research and Reports · 2018

Aims: A self-oxidized sludge reduction process was installed in a municipal sewage treatment plant at full scale in order to verify the efficiency of the process. Study Design: A full-scale (100 m3) self-oxidized sludge reduction tank was constructed in a municipal sewage treatme...

Open access Research Article 10.9734/JSRR/2018/40146

Comparison of Processes for Producing Better Rice Husk Silica Produced from a Field-scale Incinerator

Ryoko Sekifuji & Masafumi Tateda · Journal of Scientific Research and Reports · 2018

Aim: The “amorphous” state of silica is the critical characteristic necessary for its use in various applications.  Extensive experimentation has determined that the highest quality rice husk ash is obtained after treating the ash in two steps: a burning step followed by a curing...

Open access Research Article 10.9734/JSRR/2017/39409

Taste Evaluation of Rice Grown in Soil Treated with Commercial Silica and Recycled Rice Husk Silica

Ryoko Sekifuji & Masafumi Tateda · Journal of Scientific Research and Reports · 2018

Aim: To evaluate the taste of rice grown in soil treated with rice husk silica in order to elucidate the potential use of rice husk silica as a fertilizer in terms of taste of rice. Study Design: Rice plants were grown in soil treated with rice husk silica and officially approved...

Open access Research Article 10.9734/JSRR/2017/38828

Observation of Physio-Chemical Differences of Rice Husk Silica under Different Calcination Temperatures

Ryoko Sekifuji, Van Chieu Le, Bandunee Champika Liyanage & Masafumi Tateda · Journal of Scientific Research and Reports · 2017

Aims: Amorphous silica in rice husk ash is a reliable and sustainable resource, although rice husks are currently an issue for farmers. Amorphous silica is a resource in various industrial applications and can easily be obtained from rice husks if they are treated correctly. If t...

Open access Research Article 10.9734/JSRR/2017/37621

Case Study of Fire Flame Resistance Improvement of a Plywood Board Coated with Paint Containing Added Rice Husk Amorphous Silica

Ryoko Sekifuji, Chieu Le Van & Masafumi Tateda · Journal of Scientific Research and Reports · 2017

Aims: Rice husks constitute an issue of concern for stakeholders interested in rice production; on the other hand, rice husk silica has been recognized as a valuable resource for industrial uses. Thermal insulation is a potential industrial benefit offered by silica. In this stud...

Open access Research Article 10.9734/JSRR/2017/36412

Case Study: Technical Considerations to Optimize Rice Husk Burning in a Boiler to Retain a High Solubility of the Silica in Rice Husk Ash

Masafumi Tateda, Ryoko Sekifuji, Mana Yasui & Atsushi Yamazaki · Journal of Scientific Research and Reports · 2016

Aims: Optimal conditions were investigated for the operation of a boiler using rice husks as fuel. Superior operation resulted in the production of high quality ash as well as heat recovery. Good quality ash is a useful resource that can bring profits to a local community. Study...

Open access Research Article 10.9734/JSRR/2016/27902

A Proposal for Measuring Solubility of the Silica in Rice Husk Ash

Masafumi Tateda, Ryoko Sekifuji, Mana Yasui & Atsushi Yamazaki · Journal of Scientific Research and Reports · 2016

Aims: At present, rice husk is being used in many applications as a biomass resource. The method of rice husk quality evaluation, especially solubility, is not codified and therefore values cannot be compared across regions and institutions. In this study, the solubility of silic...

Open access Research Article 10.9734/JSRR/2016/27239