Journal Press India^®

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In this work Ultrasonic pre-treatment was performed on cow dung slurry in anaerobic conditions to observe the methane quality and hydraulic retention time (HRT). Response Surface Methodology (RSM) was used to determine the optimum ultrasonication time, temperature, and hydraulic retention time in this study on the ultrasonic pre-treatment of cow dung for the production of biogas. 13 experimental runs were developed in accordance with Central Composite Design with various set up conditions to observe the Responses, i.e., methane yield produced across 28 days after HRT. This was accomplished with the help of a software programme(Design Expert 12.0.1.0). In order to analyse the effects of the variables and their interactions to establish their optimal values, quadratic models for the responses were created, and a 3D response surface map was generated. The sonication time, temperature, and retention period following HRT were determined by numerical optimisation to be 35 minutes, 60°C, and 8 days, respectively.

Keywords

Cow dung; Sludge water; Food waste; Ultrasonic treatment; Biogas; RSM; Methane; Anaerobic digesters

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