2.4.2.3. Discounted payback period. A discounted cash flow model using
an internal rate of return (i.e., discount rate) of 10% was used to assess
financial feasibility. The discounted payback period represents the length of time it takes for the facility to achieve a financial break-even point (i.e., a net present value (NPV) equal to zero), assuming that the
fuel and feed are sold at certain market prices. The discounted payback period (DPB) is calculated by solving