Nutrient removal : WEF manual of practice No. 34 / Prepared by the Nutrient Removal Task Force of the Water Environment Federation - New York : McGraw-Hill, 2011 - xxxvi, 628 p. : ill. ; 25 cm. - WEF manual of practice ; no. 34 . ISBN: 007173709X 9780071737098 Subjects--Topical Terms: Sewage --Purification --Nutrient removalSewage --Purification --Nitrogen removalSewage --Purification --Phosphate removal LC Class. No.: TD745 / .N87 2011