Table 9.
Economic Feasibility of Spent Acid Regeneration and Metal Ion Recovery DD runs, at 5500 kg/d, in the textile industry.
| Water Input (kg/d)a |
Feed (kg/d) |
Spent Solutionb (kg/d) |
Recovered Acid (kg/d)c |
|
|---|---|---|---|---|
| 3300.00 | 5500.00 | 5277.15 | 3522.85 | |
| H2SO4 | – | 4041.02 | 549.37 | 3491.66d |
| H2O | 3300.00 | 1458.98 | 4727.78 | 31.19 |
Note: Operation time: 8.5 h, equiv. To one (working) day.
a
Feed/Water = 0.6.
b
Mass Balance: F + W R + S.
c
Also called ‘Depleted’ Solution.
d
Worth US $83,799 of technical-grade H2SO4 used.