Respirometry in control of the activated sludge process :  principles / 
by IAWQ Task Group on Respirometry, Spanjers, Henri ... [et al.] 
 - England :  IWAQ Pub.,  1998 
 - ix, 48 p. :  ill. ;  30 cm 
 - Scientific and technical report ;  no.7 .
<br/><br/><label>ISBN: </label>1900222043  RM267.90 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Purification--Activated sludge process<br/>Microbial respiration--Measurement