mixed bredとは 意味・読み方・使い方

When water (28, 48) to be treated is filtered through the biological layer of a prescribed thickness comprising sand (25, 40) and microorganisms which are stuck to the sand and bred, air bubbles having diameter of ≤80 μm are mixed in the water to be treated and then it is filtered through the biological layer.例文帳に追加

砂（２５、４０）と該砂に付着して繁殖した微生物とからなる所定の厚さの生物層で被処理水（２８、４８）をろ過するとき、被処理水に径が８０μｍ以下の空気の気泡を混入した後に前記生物層でろ過する。 - 特許庁