During the year 2003–04, the bio- methanation plant generated 4145,000 m3 of methane gas and replaced the use of furnace oil worth 24.8 million TNPL obtained the 3 Leaves Award under the Green Rating project of the Centre for Science and Environment, New Delhi during October 2004, in recognition of the Environment Management System. Energy management policy TNPL has installed its own power generating facility to make it 100% self-sufficient through the installation of 61.18 MW Power Generating equipments (TG Sets) installed at the paper mill site. The surplus power generated is being exported to the State Grid. TNPL also generates green power through the 18 MW wind farm installed at Devarkulam and Perungudi of Tirunelveli district. The entire power generated at the wind farm is being exported to the State Grid. The wind farm capacity has been enhanced to 21.75 MW in March 2004 by installing 3 wind turbine generators of 1250 kW capacity each. It has installed a Bio-methanation plant to generate methane gas from the effluent water (bagasse wash water) and use it as fuel as substitute for furnace oil in the lime kiln saving 10 KL of furnace oil every day. During the year 2004–05 TNPL generated 3412,000 m3 methane gas from its bio-methanation plant and used the same in lime-kiln replacing 1886 KL of furnace oil valuing 20 million. The confederation of Indian Industry has recognised the bio-methanation project implemented by TNPL as an Innovative Project. This project contributes to sustainable development in terms of generating in-house renewable energy and reducing green house gases. Clean Development Mechanism (CDM) projects in TNPL Registered CDM project Methane Extraction and fuel conservation Project 6.75 MW Small Scale Grid Connected Wind Electricity Generation Project Methane extraction and fuel conservation project TNPL commissioned a special kind of reactor concept for the "high rate" anaerobic treatment of wastewater called the Upflow Anaerobic Sludge Blanket (UASB) reactor which uses anaerobic granular sludge bed technology. The most common Bagasse Wash Water (BWW) treatment system used in India consists of a pond or a lagoon treatment system, which undergoes anaerobic digestion that releases a significant amount of greenhouse gases (GHG) into the atmosphere. In addition, the project also involves a system for utilization of extracted biogas which gained CDM benefits for the project from the closed reactor as fuel in a lime kiln, which had been using furnace oil (fossil fuel). Installation of a