Summary of Research Project Results under JSPS FY2001
"Research for the Future Program"

1.Research Institution Toyohashi University of Technology
2.Research Area Integrated Fields
3.Research Field Causes and Effects of Environmental Loading and its Reduction
4.Term of Project FY 1997 〜 FY 2001
5.Project Number 97I00504
6.Title of Project Development of Wastes Recycle Technologies Using High Temperature and High Pressure Treatments

7.Project Leader
Name Institution,Department Title of Position
Koichi Fujie Toyohashi University of Technology, Ecological Engineering Professor

8.Core Members

Names Institution,Department Title of Position
Akiyoshi Sakoda University of Tokyo, Institute of Industrial Science Professor
Hiroyuki Daimon Toyohashi University of Technology, Ecological Engineering Assistant
Masaki Sagehashi University of Tokyo, Institute of Industrial Science Assistant

9.Summary of Research Results

   The present research aimed to develop a novel technology for wastes reclamation to establish recycle-based emission minimized society. The effect of reaction conditions such as temperature, pressure, reaction time, etc. on the production of amino acids from hydrolysis of proteinaceous wastes such as fish wastes and silk wastes in high temperature and pressure water was studied comprehensively. The type operations of reactors utilized for the present research are semi-batch, batch and continuous flow under the sub- and super critical condition. The degradation pathway of the proteinaceous materials to amino acids and then to organic acids followed by mineralization was investigated and clarified under various reaction conditions. The degradation of various amino acids and polypeptides were also studied for the kinetic analyses of reactions. These results were effectively utilized to make a model to estimate an optimal reaction condition to increase the yield of target materials.
   The similar investigation was carried out for the degradation of woody wastes to produce value added materials for recycle. The reaction pathway and inventory of possible reactions occurred in the sub- and super critical water were summarized and categorized. The information can be utilized to estimate the reaction for the treatment of cellulose, hemicelluloses and lignin in sub- and super critical water. Multi-stage reaction process was developed using a screw feeder pump for the simultaneous treatment of cellulosic wastes and extraction of value added materials produced. Other applications of the sub- and super critical water reaction for wastes recycle such as plastics, carbon fiber reinforced plastics, waste cast sand and so on were developed as well. It was shown that the sub- and super critical water reaction is a promising technology for various areas from the environment conservation to the industrial production.

10.Key Words

(1)Sub- and super critical water、(2)industrial production、(3)resources recovery
(4)proteinaceous wastes、(5)cellulosic wastes、(6)plastic wastes
(7)reaction mechanism、(8)Reactor design、(9)materials recycle network