title: Effects of titanium dioxide mediated dairy waste activated sludge deflocculation on the efficiency of bacterial disintegration and cost of sludge management.
abstract: This investigation explores the influence of titanium dioxide (TiO2) in deflocculating (removal of extracellular polymeric substance - EPS) the sludge and subsequent biomass disintegration by bacterial pretreatment. The EPS removed at an optimized TiO2 dosage of 0.03g/g of SS of TiO2 and a solar radiation exposure time of 15min to enhance the subsequent bacterial disintegration. The outcomes of the bacterial pretreatment reveal SS reduction and COD solubilization for the deflocculated (EPS removed and bacterially pretreated) sludge was observed to be 22.8% and 22.9% which was comparatively greater than flocculated (raw sludge inoculated with bacteria) and control (raw) sludge. The higher methane production potential of about 0.43(gCOD/gVSS) was obtained in deflocculated sludge than the flocculated (0.20gCOD/gVSS) and control (0.073gCOD/gVSS). Economic assessment of this study provides a net profit of about 131.9USD/Ton in deflocculated sludge.
authors: Department of Civil Engineering, Regional Centre of Anna University, Tirunelveli, India.
authors: V
authors: V
authors: Godvin Sharmila
authors: Department of Civil Engineering, Regional Centre of Anna University, Tirunelveli, India.
authors: S
authors: S
authors: Kavitha
authors: Department of Civil and Materials Engineering, University of Illinois at Chicago, United States.
authors: K
authors: K
authors: Rajashankar
authors: Department of Civil and Environmental Engineering, Sungkyunkwan University, Seoul, South Korea.
authors: Ick Tae
authors: IT
authors: Yeom
authors: Department of Civil Engineering, Regional Centre of Anna University, Tirunelveli, India. Electronic address: rajeshces@gmail.com.
authors: J
authors: J
authors: Rajesh Banu
mesh_terms: D001419:Bacteria; D003612:Dairying; D005427:Flocculation; D012722:Sewage / Q000737:chemistry / Q000382:microbiology; D014025:Titanium / Q000737:chemistry*; D014865:Waste Disposal, Fluid
chemical_list: D012722:Sewage; C009495:titanium dioxide; D014025:Titanium
keywords: Biosurfactant; Floc disruption; Methane; Solar photocatalysis; Titanium dioxide