title: Synergetic effect of combined pretreatment for energy efficient biogas generation.
abstract: Physiochemical disintegration of waste activated biosolids (WAB) through thermochemical (TC) pretreatment requires high energy and cost for efficient energy generation. Therefore in the present study, an attempt has been made to enhance the biodegrdability and to minimize the operational cost of TC pretreatment by combining it with ozonation. A higher solubilization of about 30.4% was achieved at lesser energy input of about 141.02kJ/kgTS and a ozone dosage of about 0.0012mgO3/mgSS through this combined thermo chemo ozone (TCO3) pretreatment. The methane production potential (0.32gCOD/gCOD) of TCO3pretreatment was comparatively higher than the (0.19gCOD/gCOD) TC pretreatment. The energetic analysis and economic assessment of the proposed method of pretreatment can possibly reduces the energy requirement of TC pretreatment with a positive net profit of about 35.49$/ton of biosolids.
authors.affiliation: Department of Civil Engineering, Regional Campus of Anna University, Tirunelveli, India.
authors.forename: R Yukesh
authors.initials: RY
authors.lastname: Kannah
authors.affiliation: Department of Civil Engineering, Regional Campus of Anna University, Tirunelveli, India.
authors.forename: S
authors.initials: S
authors.lastname: Kavitha
authors.affiliation: Department of Civil Engineering, Regional Campus of Anna University, Tirunelveli, India. Electronic address: rajeshces@gmail.com.
authors.forename: J
authors.initials: J
authors.lastname: Rajesh Banu
authors.affiliation: Graduate School of Water Resource, Sungkyunkwan University, Suwon, South Korea.
authors.forename: Ick Tae
authors.initials: IT
authors.lastname: Yeom
authors.affiliation: Centre for Plant Biotechnology, St Xavier's College, Palayamkottai, Tirunelveli, India.
authors.forename: M
authors.initials: M
authors.lastname: Johnson
mesh_terms: D001673:Biodegradation, Environmental; D056804:Biofuels / Q000032:analysis / Q000191:economics; D057919:Biological Oxygen Demand Analysis; D060326:Chemistry Techniques, Synthetic / Q000191:economics / Q000379:methods; D003362:Cost-Benefit Analysis; D008697:Methane / Q000032:analysis; D010126:Ozone / Q000737:chemistry*; D012722:Sewage / Q000032:analysis; D018505:Waste Management / Q000191:economics / Q000379:methods
chemical_list: D056804:Biofuels; D012722:Sewage; D010126:Ozone; D008697:Methane
keywords: Biopolymers; Chemical oxygen demand solubilization; Suspended solids reduction; Thermo chemo ozone pretreatment; Waste activated biosolids