Define Schematic

What are some water treatment processes?
Please define each and give a Schematic Diagram. If possible, also include a problem application and design.
http://www.tpub.com/content/doe/h1015v2/css/h1015v2_59.htm
http://www.unesco-ihe.org/vmp/articles/Short-Courses/SHO-WTPP.html
http://www.agr.gc.ca/pfra/water/treatment_e.htm
http://www.excelwater.com/eng/b2c/about_8.php?WL_Session=f1449f474c6382407f68b1bc11aa79b1
Schematic Diagrams:
Ion exchanger http://www.tpub.com/content/doe/h1015v2/css/h1015v2_64.htm
CO2 cleaner http://www.p2pays.org/ref/03/02781/
McApps Define DiffPair Pt1