Development of a Technology for Treating Wastewater Contaminated with Nitric Acid

Table 5

Economic assessment using static and dynamic economic indicators*.

Economic indicators	Wastewater treatment plant
Annual sales (US$)	600000
Annual total production cost (TPC) (US$/y)	185387
Annual depreciation (US$/y)	55938
Annual gross profit (AGP) (US$)	358675
Return on investment, aver. (ROI) (%/y)	22
Payback period (PP) (y)	3
Net present value (NPV) (US$)	924399
Internal rate of return (IRR) (%)	26

*Considering an annual depreciation factor of 0.10 (10 years of project’s health life).