著者

村上 光正 吉識 忠継 浦上 良樹

出版者

公益社団法人 日本水環境学会

雑誌

水環境学会誌 = Journal of Japan Society on Water Environment (ISSN:09168958)

巻号頁・発行日

vol.18, no.4, pp.307-314, 1995-04-10

参考文献数

14

被引用文献数

3 4

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A system with a submerged biofilter was employed for purifing pond water. The slime on the biofilm has a high ability of adsorption of pollutants when BOD loading is below one tenth of the ordinary. The circulating number, the ratio of the flow rate to the pond volume, is important for total purifing system. The number is 1-2d-1 under the conditions in which the flow of the pond is complete mixing type, the specific growth rate of algae is 0.5-1d-1, and the removal ratio of SS is 0.5.The experimental biofilter bed for the pond water of 450m3 was 0.45m width with a depth of 0.6m. The bed packed with the media of 22mm pitch corrugated plates was elongated about 80m to introduce the adsorption ability and to deduce the excess sludge and was not aerated. The result showed that the quality of the pond water maintained BOD 1mg·l-1, SS 0.9mg·l-1, and transparency > 100cm. The removal ratio of SS on the bed was about 60%.This is an energy saving system because the filtering head of the bed is lower than that of filters such as a sand filter or a filter cloth.

著者

村上 惇 松下 裕臣 吉識 忠継 新保 正樹

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.34, no.384, pp.1099-1104, 1985-09-15 (Released:2009-06-03)

参考文献数

27

被引用文献数

2 2

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The morphology of phase-separation and the mechanical properties of amine cured rubber-modified epoxy resins were investigated.The results of the dynamic mechanical properties and the microscopic observations indicated that the epoxy-rich matrix phase was plasticized by the dissolved rubber and the rubber-rich domains were dispersed homogeneously in the epoxy-rich matrix.The rubber-modification of epoxy resins enhanced the fracture toughness against crack initiation and caused the crack arrest. The size of the plastic-deformed region at the crack tip was correlated well with the fracture toughness against crack initiation according to Dugdal's equation.From the fatigue crack propagation (FCP) tests at a low frequency it has been shown that the presence of rubber domains introduces the interfacial debonding between the domain and the matrix as the result of stress response, which promotes the FCP at the low stress intensity factor range.