TY - BOOK AU - Owen, William F. AU - ED - ED - ED - ED - SN - 0132776650 (hardback) SN - 2 PY - 1982///];copyright 198246 CY - Englewood Cliffs, N.J. PB - Prentice-Hall KW - KW - 2 KW - 0 KW - 6 KW - 20 KW - Purification;Energy consumption.;Purification;Energy conservation KW - Sewage;Sewage N1 - Includes bibliographies and index; 5 ER -