Corrosion is the interaction of metals with their environment which results in damage to metals. Corrosion can also occur in the chain of vessels that are usually located on the side of the ship's hull and are directly exposed to sea water. If it is not properly observed, the condition will damage and reduce the life of the ship chain. It is necessary to add inhibitors as substances to inhibit the corrosion rate. Inhibitors that are generally used are inhibitors that have toxic properties to the environment, therefore it is necessary to use organic inhibitors that do not damage the environment. The purpose of this study was to determine the effect of inhibitors of guava leaf extract on the corrosion rate of ship chains. This research was conducted by immersing specimens with concentrations of 6%, 9%, 12%, and immersion time of 1 hour. Corrosion rate is calculated using the dynamic potentiary polarization method. After calculating the corrosion rate, the inhibitor efficiency is calculated. After immersion is obtained, the inhibitor has an influence. This was shown after the corrosion test found that at a concentration of 9% inhibitors of guava leaf extract was able to reduce the corrosion rate of 0.066 mpy and has the highest efficiency value of 97.3%

Used hydraulic oil SAE 10 is a waste activities that are often found in Indonesia, especially in mining and plantantion scale hydraulic large. Waste used oil SAE 10 can be used as a fuel mixture of hydrocarbons is done by mixing the used oil hydraulic SAE 10 with other fuels such as gasoline, kerosene, diesel fuel with the addition of a maximum percentage of less than 50%. this research tries to investigate exhaust emissions on diesel engines with hydraulic mixing used oil into diesel fuel with a mixture of different variations. The machine used is a four-stroke diesel engine with a maximum power of 4.4 kW. Be based testing has been done variations of a mixture of 5% and 10 % is still within the allowed limits.

Oil palm plantations produce waste that has not been used so far, namely Oil Palm Fronds. This waste can be converted into energy in the form of producer gas using gasification technology. This study aimed to model the gasification process using Aspen Plus in a multi-stage gasifier by adding air at the pyrolysis and oxidation zone. The influence of variations in air ratio (AR) between the pyrolysis and oxidation zones have been analyzed. The results of this model are validated with experimental data to get accurate results. Based on the modeling results H2 content for all variations of Air Ratio (AR) has increased from 8.12% in single-stage to 9% in multi-stage. However, when viewed from the total efficiency was lower than single-stage gasification. It can be concluded that multi-stage gasification can be applied to improve gasification performance, especially to increase volumetric percentage of hydrogen. However, when viewed from the total efficiency was lower than single-stage gasification. Overall, the results of gasification modeling using Aspen Plus can be used as a reference to improve gasification performance.

Municipal solid waste (MSW)  is a type of general waste that includes households, traditional markets, commercial areas, and the rest from public facilities, schools, offices, roads, and so on. Refuse Derived Fuel (RDF) is obtained from the remnants of MSW which cannot be used anymore, which is flammable waste and is separated from parts that are difficult to burn through the process of chopping, sifting, and air classification. RDF has potential as an alternative energy source. In this study, RDF fuel was compared with MSW fuel both by proximate and calorific value, then the gasification process was carried out using a multi-stage downdraft gasifier to see gasification performance indicators such as syngas composition, LHV, cold gas efficiency, and tar concentration. The results showed that the gasification performance indicator for MSW biomass resulted in the syngas composition of CO = 19.08% v, H2 = 10.89% v, and CH4 = 1.54% v. The calorific value (Low Heating Value, LHV ) of syngas is 4,137 kJ/kg, cold gas efficiency is 70.14%, and tar content is 57.29 mg/Nm3. Meanwhile, RDF obtained the composition of CO gas: 18.68% v, H2: 9.5446% v, and CH4: 0% v. The maximum LHV syngas is 3365.08 kJ/kg, cold gas efficiency is 57.19 % and the smallest tar content is 80.24 mg/Nm3. When compared to RDF, MSW produces a better gasification performance indicator. However, RDF can still be used as an alternative energy source using the gasification process. The results of this study can be used to optimize the further RDF gasification process.

Kegiatan pelatihan ini adalah sebagai penunjang bagi pemuda karang taruna desa Karyabaru kecamatan barambai kabupaten Barito Kuala dalam memahami lebih jauh lagi mengenai pelatihan Komputer, serta memperkenalkan metode “learn and fun” pada pelatihan tersebut.    Sedangkan tujuan dari kegiatan ini adalah Melaksanakan Tri Dharma Perguruan Tinggi berupa Pengabdian Kepada Masyarakat. Kemampuan dalam menyampaikan ide dan gagasan dalam upaya untuk membangun desa memerlukan dukungan teknologi informasi dan komunikasi yang dituangkan dalam bentuk spanduk, poster, undangan. Ini semua dapat dilakukan, jika kita dapat menguasai atau memiliki kemampuan design grafis yang baik. Pada kesempatan kali ini akan dilakukan transfer pengetahuan berupa penguasaan ketrampilan design grafis menggunakan software photoshop dan corel draw.Dilakukan survey pendahuluan untuk melihat situasi kerja di lingkungan  kelurahan/  aparatur  desa    dalam  melakukan   tugas  dan  fungsi   (Tupoksi)   serta  kondisi masyarakat. Mengajak aparatur desa  untuk menggerakkan masyarakat melalui organisasi  yang  ada  di  daerah  atau  desa/kelurahan   Karya Baru. Mengkoordinir peserta yang berminat terhadap pelatihan-pelatihan yang sudah disiapkan oleh tim. Peserta  mampu  melaksanakan   pelatihan design grafis dengan hasil yang dapat diimplementasikan dalam kegiatan keseharian menyangkut desain grafis.