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WEF WaterBlog

The Water Environment Federation (WEF) WaterBlog is hosted by water quality experts and features discussions about the latest ideas, trends, and news in the profession.

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Happy Birthday Activated Sludge!

In 1913, H.W. Clark and S. De M. Gage reported results of studies on the purification of sewage using aeration. They found that if you aerated sewage, you achieved a clarified sewage and a reduction of Total Kjeldahl Nitrogen. In 1914, Edward Ardern and W.T. Lockett added the concept of recycling sludge, patented the process, and cointed the term “activated sludge.” Today we can truly realize the power of these discoveries.





Posted by:
Jeanette Brown, 2010-2011 President of WEF