Barito Kuala is a regency located in South Kalimantan Province. Most people in Barito Kuala Regency are rice farmers. When the rice is harvested, the harvest is traditionally dried by using radiation from the sun. However, the utilization of solar energy cannot always be used for example due to weather effects. Harvested rice has a moisture content of 21-26%. According to the SNI standard (Indonesian National Standard), the maximum moisture content in rice grain to be marketed is 14%. The purpose of this research is to make a tool and measure the level of effectiveness for drying small-scale rice grain. testing is done by taking a portion of rice grain then put into a box type rice grain dryer and compared with drying that utilizes solar energy. The results of the data obtained that every 5 minutes have a difference in the decrease in water content of 2.18% for 20 minutes with an initial water content of 15.3%.
Emisi gas buang dipengaruhi oleh jenis bahan bakar dan jenis kendaraan yang digunakan, oleh karena itu untuk mengurangi kadar emisi gas buang dapat dilakukan dengan cara menyempurnakan pembakaran dan menambahkan catalytic converter pada knalpot kendaraan. Penelitian ini membuat alat catalytic converter dengan memvariasikan penggunaan material logam agar dapat mengetahui pengaruh emisi gas buang pada sepeda motor. Metode penelitian yang digunakan adalah jenis ekperimental. Variabel yang digunakan yakni stainless steel, tembaga, aluminium, dan fiberglass. Hasil pengujian pada rpm 3000 menunjukkan bahwa adanya penurunan kadar CO2 1,24%, dan juga HC sebesar 141,7 ppm CO2 3,1%, ini terjadi pada katalis tembaga. Pada katalis aluminium pada rpm yang sama terjadi penurunan kadar hc sebesar 143,7 ppm dan kadar CO turun sebesar 1,15% karbondioksida turun sebesar 2,9%. Pada katalis spongesteel pada rpm 3000 terjadi penurunan kadar CO sebanyak 1,49%, sedangkan untuk kadar HC terjadi penurunan 166,34 ppm dan karbondioksida turun 3,47%. Sedangkan untuk katalis fiberglass kadar co menurun sebesar 1,21% dan kandungan HC sebesar 154,4 ppm, dan kadar karbondioksida turun sebesar 3,04%. Exhaust Emissions Are Substances In The Form Of Gas Or In The Form Of Other Particulates Expelled Through The Exhaust And Is The Residual Result Of Fuel Combustion In The Combustion Chamber. Exhaust Emissions Are Influenced By Several Things, Including The Type Of Fuel Used, And The Type Of Vehicle Used And The Age Of The Machine. Therefore To Reduce The Levels Of Exhaust Emissions Can Be Done In Several Ways, Namely By Perfecting Combustion And Also By Adding A Catalytic Converter To The Exhaust Of The Vehicle. The purpose of this research is to make a catalytic converter with a variety of metals in order to determine the effect of exhaust emissions on motorcycles. The research method used is the type of experiment. Variables Used Are Stainless Steel, Copper, Aluminum, And Fiberglass. Based on the Emission Test, it can be concluded that the results of this study at 3000 rpm indicate that there is a decrease in CO2 levels of 1.24%, and also Hc by 141.7 ppm CO2 3.1%, this occurs in the copper catalyst. In the aluminum catalyst at the same Rpm there was a decrease in Hc content of 143.7 ppm and a decrease in co content of 1.15% carbon dioxide decreased by 2.9%. In Spongesteel Catalyst At 3000 Rpm there was a decrease in CO levels of 1.49%, while for HC levels there was a decrease of 166.34 ppm and carbon dioxide decreased by 3.47%. As for the Fiberglass Catalyst, the CO content decreased by 1.21% and the HC content was 154.4 ppm, and the carbon dioxide content decreased by 3.04%.
Development of alternative energy sources that can be one of the potential to produce energy in overcoming the fuel energy crisis. The availability of a lot of rubber trees and gelam bark waste in the area of South Kalimantan so it needs to be used to be processed as raw material for briquettes. In this research using a mixture of rubber shell briquettes and gelam bark waste by varying the weight percentage of the mixture. Tests carried out by burning the briquette on a heating element, to determine the characteristics of combustion in briquettes which include the time of initial ignition, the length of the combustion process, and the change in mass of the briquette to ashes. The results show the length of time of starting the ignition and the length of time the combustion process has decreased with an increasing percentage of gelam bark mixture that is during 13.7 s with a burning time of 5.54 minutes. This is due to fibrous and brittle gelam wood bark so it is flammable and contains volatile matter. High lignin content in the rubber shell leaves more ash than gelam bark which is equal to 5.75 gr
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