Book Image - Activated Sludge


Evaluating & Controlling
Your Process

(Seventh Edition)
by Tim Hobson

More information about what's in the book. 


Published by:

Hobson's Choice Press
Olathe, KS
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To Order:

Order through
Click here to find it on Amazon.

At this time (1-15-2020), all orders must be done through Amazon.   The book is printed ‘on-demand’ and this is the only ordering source.



.Praised As

  • "An excellent textbook for training courses and workshops"
  • "Easily the most understandable source on the subject"
  • "Enjoyable to read"
  • "Informative"

Revised, 119-page, 8.5" x 11" book

Includes a section with all calculations in metric units in addition
to the usual American units.


Activated Sludge is used as a training text and reference in courses and workshops in Canada, Colorado, Florida, Kansas, New York, North Carolina, South Carolina, Pennsylvania, West Virginia and many other locations.