Sludge volume index

…The volume of the sludge layer at this time is called the sedimentation volume, and the value expressed as the sludge volume per unit mass or volume of particles indicates the state of particle packing in the liquid, and is influenced by the shape, size and distribution of particles, particle-particle interactions, affinity between particles and liquid, and the type of adsorbent on the particle surface. The SVI (sludge volume index), which expresses the sludge volume per gram of particles in cc after 30 minutes of standing, is also used as a measure of the sedimentation properties of the slurry. The sedimentation phenomenon is widely used in solid-liquid separation such as sedimentation thickening and clarification in the mining and industrial fields, and the batch sedimentation curve is the basis for their design. …

*Some of the terminology that refers to "sludge volume index" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…このときのスラッジ層の容積を沈降容積sedimentation volumeと呼び，粒子単位質量または容積当りのスラッジ容積で表した値は液体中の粒子充てん状態を示すもので，粒子の形，大きさとその分布，粒子間相互作用，粒子と液体の親和性，粒子表面の吸着物質の種類などに影響される。30分静置後の粒子1g当りのスラッジ容積をccで表したSVI(sludge volume index)もスラリーの沈降性を表す尺度として用いられる。沈降現象は鉱工業で沈降濃縮や清澄化などの固液分離に広く用いられており，回分沈降曲線はそれらの設計の基本となるものである。…

※「sludge volume index」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報