Microorganism immobilization carrier, sewage purification method and sewage purification device

摘要

PPROBLEM TO BE SOLVED: To provide a hydrophilic, flexible polyurethane foam suitable for a microorganism immobilization support and its manufacturing method, a microorganism immobilization support using the polyurethane foam, as well as a sewage disposal method and apparatus. PSOLUTION: This hydrophilic, flexible polyurethane foam, when its sample of 101010mm size is floated in distilled water and retained under an atmospheric pressure, takes 5 or less hours until the top surface of the sample goes down under water. The manufacturing method of the polyurethane foam comprises foaming a raw material made by formulating a polyisocyanate ingredient, a polyol ingredient, a catalyst, a foaming agent, a surfactant and other auxiliaries, wherein the 1.5 pts.wt. surfactant is formulated based on the polyol of 100 pts.wt. The microorganism immobilization support is made from the polyurethane foam. The sewage disposal method and apparatus employ the support. PCOPYRIGHT: (C)2004,JPO&NCIPI