The 75th Hiroshima University Biomass Evening Seminar (The 53rd Hiroshima University ACE Seminar)

Date & Time: Thu.13 Jun., 2019   16:20-17:50
Place: Engineering 108Lecture Room, Higashi-Hiroshima Campus, Hiroshima University


Commentary: Yukihiko MATSUMURA
  Professor, Graduate School of Engineering, Hiroshima University


Lecture: Hiroki YOKOYAMA
 M2  Graduate School of Engineering, Hiroshima University 

Oily Waste Water Treatment Using Microalgae 

The Malaysian palm oil industry has grown rapidly. But, this industry has the problem of the enormous generation of oily wastewater from palm oil refining plant. Eco-friendly treatment methods of this wastewater are wanted, and algae biomass should be useful for this purpose. but there is no study about oil removal using microalgae. So, objective of this research is confirmation of the effect of microalgae on oil removal from model oily waste water. C. vulgaris was cultivated in tap water in which palm oil was emulsified. The results showed possibility that microalgae could remove oil from waste water.



 Lecture: Kenshi WATANABE
 Assistant Professor, Graduate School of Integrated Sciences for Life, Hiroshima University

Studies on lipid metabolic enzymes, metabolic networks, and lipid fermentation   

Lipid is an important substance group in various industrial fields including food, medicines and fuels. Lipid fermentation by microorganisms can efficiently produce lipid species that are difficult to obtain in large quantities from conventional sources such as plant, fish, and animal lipids. Recently, lipid fermentation from various biomass has attracted attention due to environmental issues. In this presentation, I will introduce the research about functions of enzymes related to lipid biosynthesis and the metabolic network formed by these enzymes for diversification of lipid products and improvement of productivity. 



Lecture: Rahmat Iman MAINIL
D3  Graduate School of Engineering, Hiroshima University 

Phosphorus recovery from palm oil mill effluent (POME) in supercritical water 

The amount of liquid waste from palm oil production in Indonesia is increasing every year as the production capacity increases. Phosphorus in palm oil mill effluent (POME) could be the important potential phosphorus resource, considering the depletion of phosphate rock due to over exploitation. Supercritical water gasification (SCWG) technology could convert POME into valuable gas coming along with phosphorus recovery. To acquire a good understanding about behavior of POME conversion in SCWG, a set of experiments were developed. Here, variation of temperature (500-600 °C) and residence time (5-50 s) with controlled pressure at 25 MPa were employed in a continuous reactor. A reaction model of conversion of organic phosphorus in POME to inorganic phosphorus was also proposed. As the results, the organic phosphor could be converted into inorganic phosphorus and precipitation took place in the reactor. The rate was faster at higher temperature. The reaction followed first order kinetics, and the model was found to fit well with experimental data.  


Chair: Yukihiko MATSUMURA
  Professor, Graduate School of Engineering, Hiroshima University