Biological nutrient removal (BNR) operation in wastewater treatment plants / 
prepared by the Biological Nutrient Removal (BNR) Operation in Wastewater Treatment Plants Task Force of the Water Environment Federation and the American Society of Civil Engineers/Environmental and Water Resources Institute. 
 - New York :  McGraw-Hill,  c2006. 
 - xliv, 597 p. :  ill. ;  25 cm. 
 - WEF manual of practice ;  no. 29 ASCE/EWRI manuals and reports on engineering practice ;  no. 109 .
 - Manual of practice ;  no. 29. ASCE manuals and reports on engineering practice ;  no. 109 .
<br/><br/> Includes index.  "Manual of practice no. 30"--Cover. 
<br/><br/>H.B 
<br/><br/><label>ISBN: </label>007158921x 
<br/><br/><label>LCCN: </label>2006296118 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Purification--Nutrient removal.
<br/><br/><label>LC Class. No.: </label>TD201  TD758.5.N87  / .W337 no. 29 
<br/><br/><label>Dewey Class. No.: </label>628.1/68 s  628.357 WEF