| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a property easily exhibiting a floating property in water from the initial stage of charging by removing an initial repellency, that is bubble adherability, of a plastic made microorganism carrier used to a fluidized bed type biological treating device of a waste water. SOLUTION: The initial repellency, that is the bubble adherability, of the plastic made microorganism carrier is removed and the floating property in the water is easily exhibited from the initial stage of the charging by allowing a surfactant having an anti-foaming function to contact with a surface of the carrier. A nonionic surfactant having a polyoxyalkylene group is incorporated in the surfactant having the anti-foaming function. Polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyethylene terephthalate, etc., are applied as a material of the subject plastic made microorganism carrier.</p> |
