Question

111 College,ofEngineering 3. A water treatment plant treats 0.6 of now be upgraded to removal analyzed the water and found the following concentrations (as speciesy treats 0.6 ms flow of groundwater. It has been informed that it must achieve hardness removal down to 75.0 mg/L, as CaCo,. A summer intern en) 165 (mw/L) 38 237 Co PH Na' 7.8 a) Determine the total hardness CTHD, carbonate hardness (CH), and non-carbonate hardness ising the attached flow chart, determine the quantity of lime and soda ash (in mg/L as aco;) to be added to the water to reduce the hardness to 75 mg/L as CaCO3.
part B

Answer 1

Awswes: Givens data Na 3e alkalinity- 334 Hardnessf water u d to ca, → Hardnes .is veut ew insa, fe+ 2, mna So we wegluct the hardnes of the above ons Now the totau hasdness caused du to cat2 and mt Tstal hardsess is atequivalent weight oj caco3 equivalent of ca ma y equivalant of cacos equivaluyt t 2

Total hardness ; ca+2x 50 +mq+2メ50 12 20 20 1 2 192.5 t 104.166 296.66 ma 11 Totau hardnes 26 66 m5 Carbonat hardness - TA 23m Nen- carbonate hardness H -CH 246.66 -23