TY - BOOK AU - Reynolds,Tom D. AU - Richards,Paul A. TI - Unit operations and processes in environmental engineering SN - 0534948847 PY - 1996/// CY - Boston, Mass. PB - PWS KW - Water KW - Purification KW - Sewage KW - Problems, exercises, etc KW - Problems, exercieses, etc N1 - Includes bibliographical references and index; Contents : Chemical concepts--Biological concepts--Coagulation and flocculation ER -