【Daily Question】Utilities - Water Supply and Drainage - 20200505
Thread Content
\"Reuse of Urban Sewage Water – Water Quality for Urban Non-potable Uses\" does not set requirements for the following indicators: ( ). A. COD, total nitrogen, SS B. Total dissolved solids, BOD5, ammonia nitrogen C. Color, turbidity, total coliforms D. Dissolved oxygen, pH value, odor Answer: A. The standard \"Reuse of Urban Wastewater – Water Quality for Urban Non-potable Uses\" specifies 13 indicators, namely: pH value, color, odor, turbidity, total dissolved solids, BOD5, ammonia nitrogen, anionic surfactants, iron, manganese, dissolved oxygen, total residual chlorine, and total coliforms. \"Reuse of Urban Wastewater – Water Quality for Urban Non-potable Water Uses\" sets no requirements for COD, total nitrogen, or SS in option A; therefore, A is the correct answer
A.COD, total nitrogen, SS
D. Dissolved oxygen, pH value, odor