Specific constituents such as nitrogen, phosphorus, suspended solids and heavy metals found in the wastewaer are removed during …………….. treatment of water recycling process.
A. primary
B. secondary
C. tertiary
D. none of the above
Answer:C
Specific constituents such as nitrogen, phosphorus, suspended solids and heavy metals found in the wastewaer are removed during …………….. treatment of water recycling process.
A. primary B. secondary C. tertiary D. none of the above