Bacterial pretreatment of paddy straw for enhancing biogas production

摘要

Aim : Increasing the digestibility of paddy straw and biogas production by pretreating it with bacterial culture, Delftie sp. PP4_S3.Methodology : The chopped (3-5 cm) and soaked paddy straw in different sets (each with 250 g PS) were pretreated with bacterial culture i.e., Delftia sp. PP4_63 suspension for different durations and was further utilized for biogas production.Results : Biogas yield was highest (180 I kg(-1) PS) in paddy straw treated with Delftia sp. PP4_S3 for 3 days showing an increase of 66.1% from untreated paddy straw. Chemical analysis approximately showed that maximum reduction of lignin (45.7%) and silica (17.7%) occurred in 5 days of pretreatment.[GRAPHICS]Interpretation : Treatment of paddy straw with Delftia sp. PP4_S3 enhance the digestibility of paddy straw by lowering the lignin and silica content. These observations showed that Delftia sp. PP4_S3 is a good lig nocellulosic degrader and can be efficiently used for enhancing biogas production.