CAPEX Range for a 10 MLD STP?

I am doing a survey but I am quite confused by the capital expenditure (CAPEX) figures of sewage treatment plants (STP) in different countries. For example, I was told that a STP for an activated sludge process in India cost only Rs 50-60 million (US$773,216 - 927,859) per 10 million liters per day. It appears to be incredibly low to me. Can anyone share the range of Capex of a 10 million liters per day STP in your country?