December 7, 1916: Cleveland Activated Sludge Plant

1207 Activated Sludge Plant at ClevelandDecember 7, 1916: Engineering News article. Activated Sludge Results at Cleveland Reviewed. “A comprehensive review of nearly a year’s operation of one of the two largest activated sludge plants in the United States. Cleveland’s activated-sludge installation has now been in operation over nine months. Within 10 days after passing sewage through the plant, activated sludge was produced, but it took about two months to get all the recording apparatus tested out and the plant in shape for continuous operation….

The first experiments at Cleveland with the activated-sludge process indicated that two important requirements of an ideal method of sewage treatment were being satisfied: The process produced a clear sparkling effluent and there was an absence of odors….

The theory of the activated-sludge process involves properly conditioning a bacterial growth and bringing the growth into the most intimate contact wit the suspended particles of the crude sewage. The plant, therefore, was divided into six compartments in order that the results obtained at the end of each step could be definitely studied and that, if necessary, the solid matter of the sewage could be aerated longer than the liquid itself.”

Reference: “Activated Sludge Results at Cleveland Reviewed—I.” (1916). Engineering News. 76:23(December 7, 1916): 1061-2.

1207 Activated Sludge Drawing at Cleveland-2

Advertisements

One thought on “December 7, 1916: Cleveland Activated Sludge Plant

  1. unyoked

    It’s interesting that the compartmentalization of the activated sludge facility was motivated largely by the desire to study the gradual treatment of the sludge, while now it seems to be primarily for the second reason mentioned.

    Reply

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s