2 Constituents in Wastewater An understanding of the nature of wastewater is essential in the design and operation of wastewater collection, treatment, and reuse facilities, and in the engineering management of environmental quality 1)the constituents found in wastewater (2)sampling and analytical procedures (3) physical characteristics (4)inorganic nonmetallic constituents, (5)metallic constituents (6) aggregate organic constituents 7) individual organic constituents and compounds, and (8)biological characteristics2 Constituents in Wastewater An understanding of the nature of wastewater is essential in the design and operation of wastewater collection, treatment, and reuse facilities, and in the engineering management of environmental quality. (1) the constituents found in wastewater, (2) sampling and analytical procedures, (3) physical characteristics, (4) inorganic nonmetallic constituents, (5) metallic constituents, (6) aggregate organic constituents, (7) individual organic constituents and compounds,and (8) biological characteristics