Cement Energy and Environment

The salient findings of the study are as follows: • A very high biogas yield of 45-50 Llkg of fresh dairy effluent scum and 462 Llkg of total solids was obtained. • The methane content of the biogas was found to be 70-72 per cent as compared to 50-60 per cent for the cattle dung. • The methane production potential of the dairy scum was found to be 3.8 times that of the cattle dung. • The hydrogen sulphide content of the biogas was very low (around 10-30 ppm). As such the biogas can directly be used for thermal applications as well as power generation. Dairy Effluent Scum-Based Demonstration Biomethanation Plant Based on the studies carried out at SPRERI, a demonstration plant for biomethanation of 500 kg/d dairy effluent scum has been set up at M/s Vidya Dairy, Anand (Picture 2). The floating drum– type biogas plant having effective volume of 20 m3 consisting of inlet chamber, digester, gas holder, and outlet was designed and constructed. For commissioning of the plant, the digester was charged with digested cattle slurry taken from a large cattle dung-based biogas plant in normal operation. After acclimatization of digested cattle slurry with the dairy effluent scum, an average biogas production of around 12-15 m3 per day with a methane content of 71 per cent was obtained. The biogas produced is being used for in-house thermal applications. Financials Methane (natural gas) production potential of the scum available in India 1 processing three hundred lakh litres of milk per day has * been estimated as 534- 1,068 m3 per day, enough to generate 668-1 ,335 units of electricity per day or 3.66 lakh units annually (@ 5.00 per unit). This works out to be 18.3 lakh for the electricity produced annually. Conclusion Technology for biomethanation of dairy effluent scum has been developed and demonstrated in a dairy plant. Besides providing suitable solutions to the waste management problems, the methane generated improved the overall economy of the milk processing industries. Courtesy: Akshay Urja, Volume 10, Issue 1, August 2016, Pg. 34-36 GOVERNMENT LAUNCHES SCHEME FOR SETTING UP 1.000 MW CTU- CONNECTED WIND POWER PROJECT The Ministry of New and Renewable Energy (MNRE) has launched a Scheme for setting up of 1,000 MW wind power project connected to transmission network of Central Transmission Utility (CTU) with an objective to facilitate supply of wind power to the non-windy states at a price discovered through transparent bidding process. The Ministry has designated the Solar Energy Corporation of Ind ia (SECI) as nodal agency for implementation of the scheme. The Scheme will encourage competitiveness through scaling up of project sizes and introduction of 56