The92nd Hiroshima University Biomass Evening Seminar
(The 77th Hiroshima University ACE Seminar)
Date & Time: Tue.9 Feb., 2021 16:20-17:50
Place: Engineering 110 Lecture Room, Higashi-Hiroshima Campus, Hiroshima University
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Commentary: Yukihiko MATSUMURA
Professor, Graduate School of Advanced Science and Engineering, Hiroshima University
Lecture: Yuta HIROSE
M2 student, Graduate School of Advanced Science and Engineering, Hiroshima University
“Cleaning of exhaust gas from pellet stove”
Pellet stove use wood pellet as fuel. The wood pellet is made from sawdust which occurs when making wooden products. So wood pellet is carbon neutral and important to solve the environmental problem such as depletion of fossil fuel and global warming. Therefore it is good idea to use pellet stove instead of devices which use fossil fuels as fuel. However, pellet stove have some problems to use instead of them. For example, the exhaust gas from pellet stove contains much soot, and gas which harmful for human health. So it is difficult to use in residential area. Therefore, it is important to remove these things from exhaust gas from pellet stove. In this research, we spray the water to the exhaust gas from pellet stove which contain soot to remove the soot. Heating power of pellet stove which is used in this research can be changed in 5 levels. This experiment was conducted in heating power 3, 5 with spray or no spray.
Lecture: Fumika KAMAGATA
B4 student, School of Engineering, Hiroshima University
“Potassium removal rate from bamboo using methanol”
Bamboo has a high growth rate and is expected as a raw material for combustion. However, due to the high alkali metal content, the ash melts at low temperatures, hindering the smooth operation of the furnace. Washing bamboo with water helps remove alkali metals, but the resulting bamboo has a high water content. Therefore, this study used flammable methanol, which does not require a drying step. The purpose is to determine the potassium removal rate when methanol is used as the solvent.
Lecture: Yuito SUGANUMA
B4 student, School of Engineering, Hiroshima University
“Removal of nitrogen from chicken manure using hydrothermal pretreatment”
Biomass contains several nitrogen-containing compounds, including proteins, which decompose to produce ammonia. Nowadays, ammonia is produced by the Haber-Bosch Process to fulfill the increasing demand for fertilizer with the population growth, and it is currently one of the most common chemicals produced industrially. Therefore, this study aims to elucidate the behavior of nitrogen in livestock waste by analyzing solid and liquid products under subcritical and supercritical conditions in the actual hydrothermal treatment of livestock waste.
Lecture: Shinnosuke MIYASAKO
M1 student, Graduate School of Advanced Science and Engineering, Hiroshima University
“Behavior of organic phosphorus in hydrothermal treatment”
This experiment was conducted to confirm the mineralization characteristics of phosphatidylcholine under hydrothermal treatment condition. In this study, I conducted the experiment using phosphatidylcholine dissolved in water (concentration is 1.0 wt%). It is organic phosphorus mainly contained in sewage sludge belonging to waste biomass. The experimental equipment was continuous reactor consisting of SUS316 1/8 inch tube and 1/16 inch tube. In addition, the experiment was conducted by changing the conditions of residence time and reaction time. In addition, we compared the mineralization properties of ATP and DNA, which have been confirmed in previous studies.
Chair: Yukihiko MATSUMURA
Professor, Graduate School of Advanced Science and Engineering, Hiroshima University