title: Pyrolysis of activated sludge: energy analysis and its technical feasibility.
abstract: A comprehensive study on the potential of pyrolysis of activated sludge to generate substances that can be used to produce energy was evaluated for its technical and environmental viability. The products of the process viz., pyrolysis gas, pyrolysis oil and char can readily be used by the major energy consumers viz., electricity and transportation. Based on the results obtained it is estimated that a 1 ton capacity process for pyrolysis of activated sludge can serve the electrical needs of a maximum of 239, 95 and 47 Indian houses per day, considering lower middle class, middle class and upper middle class, respectively. In addition the process would also produce the daily methane (CNG) requirement of 128 public transport buses. The process was determined to be technically feasible at low and medium temperatures for both, pyrolysis gas and electrical energy. The gas generated could be utilized as fuel directly while the oil generated would require pretreatment before its potential application. The process is potentially sustainable when commercialized and can self-sustain in continuous mode of operation in biorefinery context.
authors.affiliation: Bioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India; School of Applied Science, College of Science, Engineering & Health, RMIT, Melbourne, VIC 3001, Australia; RMIT-IICT Research Centre, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
authors.forename: Manu
authors.initials: M
authors.lastname: Agarwal
authors.affiliation: School of Applied Science, College of Science, Engineering & Health, RMIT, Melbourne, VIC 3001, Australia.
authors.forename: James
authors.initials: J
authors.lastname: Tardio
authors.affiliation: Bioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India. Electronic address: vmohan_s@yahoo.com.
authors.forename: S
authors.initials: S
authors.lastname: Venkata Mohan
mesh_terms: D001709:Biotechnology / Q000379:methods*; D003246:Conservation of Energy Resources; D004563:Electrochemistry / Q000379:methods; D005648:Fuel Oils; D005740:Gases; D006838:Hydrocarbons / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry; D007194:India; D008697:Methane / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry; D012722:Sewage / Q000737:chemistry*; D013696:Temperature; D014186:Transportation
chemical_list: D005648:Fuel Oils; D005740:Gases; D006838:Hydrocarbons; D012722:Sewage; D006859:Hydrogen; D009584:Nitrogen; D008697:Methane; D010100:Oxygen
keywords: Biorefinery; Char; Electrical power; Hydrogen; Methane