TY - BOOK ED - Water Environment Federation. Alexandria, Va. ED - American Society of Civil Engineers/Environmental and Water Resources Institute. Reston, Va. ED - Biological Nutrient Removal (BNR) operation in Wastewater Treatment Plants Task Force TI - Biological nutrient removal (BNR) operation in wastewater treatment plants: WEF manual of practice no. 29; ASCE/EWRI manuals and reports on engineering practice no. 109 SN - 0071464158 U1 - 628.357 22 PY - 2006/// CY - New Delhi PB - McGraw-Hill KW - Sewage KW - Purification KW - Nutrient removal KW - Water KW - Nitrogen removal KW - Nutrient pollution of water N1 - Includes bibliographical references and index ER -