Hι Sivakumar, My experience ...

Hι Sivakumar, My experience on this topic has to do with the use of constructed wetlands (CWs). I was involved in a related project in Germany, in one of the largest industrial areas of the country (chemical industry, petrochemical, oil refineries). The groundwater there was heavily polluted for many decades with hydrocarbons, phenols etc. We tested first in pilot scale several designs of CWs and we resulted with the optimum design. Since last June the full-scale system is operating and is treating onsite the contaminated groundwater. We calculated that within a period of 5 years money saved are almost 1.7 million euros compared to conventional mechanical technologies (air stripping etc.). Another project took place in Oman: the problem there was that during oil extraction, water containing oil was also coming out. Using hydrocyclones we managed to separate the oil from the water (95% removal) and the pumped water was followingly treated in constructed wetlands for the removal of hydrocarbon content. The treated water was then used for irrigation (we were in the middle of the desert...). Generally, this technology seems very promising and effective, while it is sustainable since the energy consumption is minimum (usually only for pumping) and maintenance costs are respectively reduced. I would be glad to discuss with you further should you have any questions. Best regards, Alex