Thin film advanced oxidation mediated pretreatment for cost efficient biofuel production and sludge management

Abstract

Proper management of the huge amount of waste activated sludge WAS generated during the conventional treatment of dairy wastewater is nowadays a major environmental issue Recently intensive efforts have been made for the development of innovative technologies to treat sludge resourcefully Proper treatment and disposal of sludge is a substantial task around the biosphere To address this issue the chemo mediated EPS Extracellular Polymeric Substances extraction was utilized to enhance pretreatment for anaerobic digestion is investigated in this sludge treatment technique Anaerobic treatment of sludge is an utmost extensively used method which has a benefit of methane generation and sludge reduction The degradation of complex macrobiotic substances in WAS is restricted during the hydrolysis step Various pretreatment process such as physical mechanical chemical and biological are adopted to overcome hydrolysis the rate-limiting step of biomethanation The complex extracellular polymeric substances EPS existences in biomass hinder hydrolysis of the substrate Exclusion of EPS followed by pretreatment improves substrate hydrolysis AOP Advanced Oxidation Process is an emerging method and currently its usage in EPS extraction is attracting the attention of researchers It has an advantage of least energy input eco friendly process without pollution and non-toxic byproducts The present exploration provides the outcomes of the process such as photocatalyst immobilization TiO2 and ZnO de aggregation immobilized photocatalyst pretreatment and bacterial pretreatment of WAS achieved during lab scale analysis newline