Discussion

Filtration

“…Miscellaneous small water filters which have been described include a Filtrine package unit for darkroom or x-ray use (2), a small clarifier of multiple-disk design (113), and a combined filter and sterilizer (47). Bayiis (11) found that a microstrainer (about 275-mesh screen) will remove 75% of the microorganisms from raw Lake Michigan water. Since the development a few years ago of a grade of diatomaceous silica which will demulsify water-oil mixtures and trap the oil in a filter cake, filters have been used more widely for boiler-feed condensate treatment.…”