Some Factors in the Purification of Sewage by the Activated Sludge Process: Thesis (Classic Reprint) - Hardcover

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Excerpt from Some Factors in the Purification of Sewage by the Activated Sludge Process<br/><br/>From the time the process was first discovered there has been much work carried on, both on the practical and theoretical phases of the problem. More attention has, however, been paid to the practical development of the process, but a few investigators have attempted to explain the nature of the purification, with the result that various theories have been suggested.

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