Densification of agricultural residues into briquettes as the alternative renewable feedstock can improve their physico-mechanical and storage properties as solid fuels.This paper presents the physico-mechanical prope...Densification of agricultural residues into briquettes as the alternative renewable feedstock can improve their physico-mechanical and storage properties as solid fuels.This paper presents the physico-mechanical properties of the composite briquettes made from corncob and rice husk.Raw samples of corncob and rice husk were collected,sorted and pulverised into fines of 0.25,1.00 and 1.75 mm particle sizes.The fines were blended at mixing ratios of 80꞉20,70꞉30,60꞉40,and 50꞉50,bonded with 5%starch on weight percentage basis and compressed at compaction pressures of 25,50,and 65 kPa to produce the briquette samples.The briquette made from 80:20 ratio of corncob to rice husk,0.25 mm particle size and 65 kPa pressure exhibited the highest compressive strength of 111 kN/m2 and the least of 39 kN/m^(2) from briquette with 50꞉50 ratio of corncob to rice husk,1.75 mm particle size and 25 kPa pressure.The briquette made from 50꞉50 ratio of corncob to rice husk,0.25 mm particle size and 65 kPa pressure had the highest water resistance capacity,and the least from briquette of 80꞉20 ratio of corncob to rice husk,1.75 mm particle size and 25 kPa pressure.The resulting physico-mechanical qualities of the produced corncob and rice husk briquettes suggested that they could be used as the solid fuels for domestic and industrial applications.展开更多
Biogas production was investigated in this study as an alternative to wood as fuel using slurries of cow dung(T1),jatropha fruit exocarp(T2),cattle dung and jatropha fruit exocarp(T3)and cow dung,jatropha fruit exocar...Biogas production was investigated in this study as an alternative to wood as fuel using slurries of cow dung(T1),jatropha fruit exocarp(T2),cattle dung and jatropha fruit exocarp(T3)and cow dung,jatropha fruit exocarp with 10 g of iron filings(T4).The 1000 mL of slurry which included 50 mL of inoculum that compensated for the dead or weak micro-organism was made for each sample.At the end of five weeks,the volume of biogas collected from the samples T1,T2,T3,and T4 when added up,gave 77,154,145 and 586 mL,respectively.The sample mixture of cow dung,jatropha fruit exocarp,and iron filings(T4),gave the highest yield of biogas production with an average weekly production of 59 mL/kg for four weeks and on the fifth week about six times emission of biogas was obtained.The production rate of the biogas was rapid after the gestation period and the T4 emerged as the most substantial emission of all the samples producing 350 mL/kg on the fifth week.展开更多
文摘Densification of agricultural residues into briquettes as the alternative renewable feedstock can improve their physico-mechanical and storage properties as solid fuels.This paper presents the physico-mechanical properties of the composite briquettes made from corncob and rice husk.Raw samples of corncob and rice husk were collected,sorted and pulverised into fines of 0.25,1.00 and 1.75 mm particle sizes.The fines were blended at mixing ratios of 80꞉20,70꞉30,60꞉40,and 50꞉50,bonded with 5%starch on weight percentage basis and compressed at compaction pressures of 25,50,and 65 kPa to produce the briquette samples.The briquette made from 80:20 ratio of corncob to rice husk,0.25 mm particle size and 65 kPa pressure exhibited the highest compressive strength of 111 kN/m2 and the least of 39 kN/m^(2) from briquette with 50꞉50 ratio of corncob to rice husk,1.75 mm particle size and 25 kPa pressure.The briquette made from 50꞉50 ratio of corncob to rice husk,0.25 mm particle size and 65 kPa pressure had the highest water resistance capacity,and the least from briquette of 80꞉20 ratio of corncob to rice husk,1.75 mm particle size and 25 kPa pressure.The resulting physico-mechanical qualities of the produced corncob and rice husk briquettes suggested that they could be used as the solid fuels for domestic and industrial applications.
文摘Biogas production was investigated in this study as an alternative to wood as fuel using slurries of cow dung(T1),jatropha fruit exocarp(T2),cattle dung and jatropha fruit exocarp(T3)and cow dung,jatropha fruit exocarp with 10 g of iron filings(T4).The 1000 mL of slurry which included 50 mL of inoculum that compensated for the dead or weak micro-organism was made for each sample.At the end of five weeks,the volume of biogas collected from the samples T1,T2,T3,and T4 when added up,gave 77,154,145 and 586 mL,respectively.The sample mixture of cow dung,jatropha fruit exocarp,and iron filings(T4),gave the highest yield of biogas production with an average weekly production of 59 mL/kg for four weeks and on the fifth week about six times emission of biogas was obtained.The production rate of the biogas was rapid after the gestation period and the T4 emerged as the most substantial emission of all the samples producing 350 mL/kg on the fifth week.
