Feasibility Study of Sewage Sludge for Thermochemical Conversion

摘要

Our current global population is 7.2 billion and growing. Earth's total resources are only good for 2 billion people at the current demand level. The way we are living, we are already using 2 to 3 times more of the Earth's natural resources than what is sustainable. Due to increasing population and all round development in the country, the per capita average annual freshwater availability has been reducing since 1951 from 5177 m~3 to 1869 m~3, in 2001 and 1588 m~3, in 2010. Forecast revealed that the further reduce to 1341 m~3 in 2025 and 1140 m~3 in 2050. Currently, India has the capacity to treat approximately 37% of its wastewater, or 22,963 million liters per day (MLD), against a daily sewage generation of approximately 61,754 MLD according to the 2015 report of the Central Pollution Control Board. According to MNRE estimates, the Potential of Energy Recovery in India is about 1460 MW from MSW and 226 MW from sewage. The large volume of sewage offers tremendous potential for Water Authorities to recycle that sludge into energy within their cities and reduce their reliance on bulk conventional energy sources for their day today activities. The preset paper investigates the feasibility of using the sewage sludge as a potential bio residue.