Handling of used aluminum has been carried out by collectors, namely the compression process. The pressing process is less economical because it still produces cavities and the selling price is low. The purpose of this community service activity is to provide training on Aluminum smelting with casting techniques for two groups of independent collectors, Mandiri Berkah and Maju Jaya. The activity took place in the Mandiri Berkah collector area which was attended by Mandiri Berkah and Maju Jaya employees and the community around Poasia. The method of implementing the activity is a theoretical explanation of Aluminum and its processing method with casting techniques. Used aluminum cans are melted in a charcoal-fired crucible furnace. The used aluminum cans are put in the kowi which is placed in a hot furnace. After the cans are melted, they are poured into rectangular molds. The results of the service activities that resulted were the opening of knowledge insights related to used aluminum. Participants were able to recycle Aluminum by casting technique into ingot products.Keywords: Training, foundry, aluminum, collectors

The main source of energy for humans is Human Resources which comes from carbon fossils. This energy has been deficient so it needs to be energy differentified. Biobriquettes are charcoal bars using soft materials that are processed into hard charcoal materials. The purpose of this study was to determine the composition of a good mixture (not easily destroyed) based on the compressive strength of the Corn Cob and Rice Husk biobrikets and to determine the flame temperature of the Corn Cob biobriket and Rice Husk. The method carried out in this study is the analysis of the flame temperature and compressive strength contained in the briquettes. The analysis carried out in this study was carried out with 5 variations in composition, namely ( corn cobs 25% : rice husks 75% : sago 15%, corn cobs 75% : rice husks 25% : sago 15%, corn cobs 50% : rice husks 50% : sago 15%, corn cobs 100% : rice husks 0% : sago 15%, and corn cobs 0% : rice husks 100% : sago 15%). From the results that have been obtained, briquettes that have good quality are found in corn cobs 25%: Rice husks 75%: sago 15% with a temperature value of 500 °C and a maximum load strength value of 159,060 with a compressive strength value of 1.0404624 N / mm2.Keywords: Corn cobs, rice husks, and flame temperature