Clarification plant

摘要

Waste water plant treats sewage by stages in tanks with different functions and is chiefly for communal waste water. The new arrangement has only one tank (I, II, III) for each purification step, and allows departure from the systematic sequence of purification operations in the plant (4), since each tank unit is capable of several treatment stages. Lines permit the dosing of media as appropriate. One tank unit (III), if required the largest, may contain two chambers (III/1 and III/2). Pref. walls between vessels are double, accommodating process pipework. They may be cellular, ducted for flow of media or for pipework, with valving arrangements. Cells are accessible to cameras, cleaning and sanitary equipment. If desired, operatives can crawl through them. The tanks accommodate the machinery, and are of concrete.