Engineering Interventions for Energy Efficient Management of Paddy Straw
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Date
2019
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CCSHAU
Abstract
The research was conducted in three phases: Biogas, Vermicompost and Pellets production from paddy straw. The biogas production was carried out in lab scale experiment using different ratios of cattle dung to paddy straw i.e. 100 % cattle dung, 1:1, 1:2, 1:3, 1:5 and 1:10. The highest biogas production from the lab scale experiment was recorded in ratio 1:5 and therefore, this ratio was used in pilot scale study. The daily biogas production and methane content was analyzed in the pilot scale experiment. The vermicompost production from the paddy straw was carried out using the paddy straw with cattle dung, biogas slurry and vegetable waste in different ratios. The vermicompost was matured after 60 days for first harvesting. The overall nutrient content was good in the combination of cattle dung + paddy straw +vegetable waste was comparable to control (100% cattle dung). For pellets production from paddy straw, pellet making machine was developed. Different parameters of the machine during pelleting and the characteristics of pellets were analyzed. The pellets were produced using 100:0, 80:20 and 50: 50 ratio of paddy straw and saw dust. Capacity of the machine was 12.6 kg of pellets/hour. The calorific value of pellets was recorded as 91.31cal/g. The pellets were produced when the machine was operating at a RPM of 38. The payback period of the machine was 2.5 years and B:C was 3.1.
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