Kulit durian merupakan biomassa yang mempunyai potensial sebagai sumber pektin. Salah satu pemanfaatan pektin adalah digunakan dalam pembuatan edible film yang merupakan lapisan tipis dan memiliki fungsi sebagai pengemas atau pelapis makanan, sertadapat dimakan sekaligus dengan produk yang dikemasnya. Untuk memanfaatkan kulit durian tersebut dalam penelitian ini dibuat edible film dengan bahan pati singkong, gliserol dan pektin kulit durian. Pengaruh konsentrasi pektin dan pengaruh konsentrasi gliserol terhadap karakteristik edible film yang dihasilkan akan dikaji dengan melihat ketebalan, uji kuat tarik, persen elongasi, dan daya serap air nya. Hasil menunjukkan bahwa pada variasi perbandingan massa pektin diperoleh bahwa peningkatan konsentrasi pektin dapat menambah kuat tarik dan elongasi edible film, namun peningkatan konsentrasi pektin tersebut tidak berpengaruh signifikan terhadap ketebalan dan daya serap edible film. Adapun pada variasi perbandingan massa gliserol diperoleh bahwa peningkatan konsentrasi gliserol dapat meningkatkan persen elongasi, kuat tarik, dan daya serap air edible film. Namun penambahan gliserol yang berlebih akan mengurangi nilai kuat tarik dan daya serap air edible film. Pada variasi penambahan pektin didapatkan hasil karakteristik yang terbaik adalah pada perbandingan massa pati:gliserol:pektin 3:1:1,25 dengan nilai ketebalan edible film sebesar 0,112 mm, nilai kuat tarik sebesar 9,32 N, dan nilai persen elongasi sebesar 79,59%.

Large-scale compressed air equipment is the only way to meet the demand for air for production facilities such as the pharmaceutical, automotive, or combustion processes industries. As one of the main driving components in the air compressor system, the double screw determines the reliability and performance of the entire compressed air system. Double screw compressors are a promising option for use in large-scale compressed air systems due to their high efficiency and reliability. The double screw profile has been specially designed to increase compression capability over a period of more than 24 hours with a range of 400 to 385 m3 per hour. The cooling oil works well keeping the compressor temperature constant at around 100 0C, even though there are very active temperature fluctuations. On the working pressure side the compressor as a whole is constant, although there is a significant spike in the dryer pressure. The dryer pressure experienced a significant increase reaching 6.9 Bar in the sixth data collection, while the cooling oil pressure and tank pressure were the same at 6.6 Bar, and the air pressure was 6.3 Bar. The results of observing the performance of compressors during industrial operation have presented the ideal working conditions for double screw compressors reaching 58.4 kJ/kg, while the actual working conditions of compressors are 66.6 kJ/kg. Overall, the average compressor efficiency is 87.81%.

Adsorben berupa pektin berhasil diekstraksi dari kulit pisang menggunakan larutan asam kuat dan telah digunakan untuk menyisihkan ion Fe3+ dalam air. Pengaruh berbagai parameter terhadap proses adsorbsi, seperti waktu kontak, pH larutan, dosis adsorben, dan temperatur adsorbsi diinvestigasi dalam suatu sistem batch. Konsentrasi ion Fe3+ dalam larutan air diukur menggunakan Atomic Absorption Spectrometry . Efisiensi adsorbsi terbaik diperoleh pada waktu kontak selama 4 jam, pH larutan 2, dosis adsorben sebesar 3 g, dan temperatur 20oC. Mekanisme proses adsorbsi dan perubahan energi bebas Gibbs, entalpi, serta entropi telah dievalusi. Model isoterm Freundlich dan Temkin paling sesuai untuk menggambarkan mekanisme adsorbsi ion Fe3+ pada pektin dengan R2 berturut-turut 0,9871 dan 0,9591. Data parameter termodinamika membuktikan bahwa adsorpsi ion Fe3+ bersifat eksotermis dan berlangsung secara tidak spontan pada rentang temperatur 20 hingga 60ᵒC. Penelitian ini menunjukkan bahwa kulit pisang dapat dimanfaatkan sebagai adsorben murah yang menjanjikan untuk menghilangkan ion Fe3+ dalam air.

The massive development of industry creates human using various of metal which available in the nature for being contruction, for example a Iron metal. The iron is a transition metal on periodic table which often used on industry and building construction, however iron is a corrodiable metal. The metal corrotion must be solved cause create many of loss. Therefore, the study aimed to examine sembukan leaf extract in various consentration, 0%, 2%, 4%, 6%, 8% to seawater and HCl 1M during 7 days of contact moment. The correlation strenght between variable using regression linier method. Based on study that the higher consentration inhibitor and the corrotion rate decreases. He highest efficiency using seawater is 89,9% and using HCl 1 is 68,9%. The highest correlation between variable is 93,2% using seawater. Th e conclution is sembukan leaf extract effective to protect iron corrotion of seawater

Pompa merupakan mesin yang digunakan untuk memindahkan fluida. Penelitian inidilakukan pada unit pompa yang ada di salah satu industry makanan, digunakan uuntukmemindahkan fluida berjenis thermal oil yang temperaturnya mencapai 300C. Penelitiandilakukan untuk mengetahui kinerja dari pompa sentrifugal dengan menggunakan dataoperasi yang ditinjau dari daya pompa, Head Pompa, Headloss mayor, minor, dan daya fluidayang dikorelasikan dengan software PSAT. Hasil menunjukkan bahwa perhitungan manualdidapatkan Head total sebesar 65,43 m dengan head loss total sebesar 11,86 m dan effisiensisebesar 82%. Hasil perhitungan PSAT menunjukan effisiensi optimal pompa sebesar 87,5%dan effisiensi exsisting sebesar 85,6% yang artinya memiliki perbedaan sebesar 4% - 7% dariperhitungan manual. Hal ini bisa disebabkan karena software tidak memperhitungkanbeberapa faktor seperti head loss

Jurnal Eksergi menerima naskah dalam bentuk laporan hasil penelitian, atau artikel review, baik dalam bahasa Indonesia maupun bahasa Inggris (diutamakan dalam bahasa Inggris) yang belum pernah diterbitkan atau tidak sedang dipertimbangkan untuk diterbitka

This study investigates the viability of employing a cabinet-type dryer with a heat energy source derived from biomass combustion to dry Eucheuma sp. using Newton's model. In this investigation, seaweed was dried with air at a temperature of 55 °C. A reduction in water content of 8.1% was attained after six hours of drying. To make the data fit the suggested drying mathematical model, the data were examined and recorded. The model feasibility test shows that, with a coefficient of determination (R2) that is close to one and corrected at 0.9502, the Newton model can be used to predict the moisture content of dried seaweed after the drying process using a cabinet-type dryer with a source of heat energy from biomass combustion.

Energy audit is very necessary to calculate the level of energy consumption of a building or buildings. The research includes the amount of energy consumption based on the initial energy audit and detailed energy audit as well as saving opportunities based on conditions in the field. Based on the initial energy audit, the value of the Energy Consumption Intensity (IKE) is 0.699 kWH/m2month, while in the detailed audit the IKE value is 0.935 kWH/m2month. Based on the results of a detailed energy audit, the lighting measurement of 325 lux still meets the requirements for a classroom with a standard between 250 lux to 500 lux.

The use of renewable energy, one of which is Hybrid Power Plants (PLTH). The PLTH used in this study is a wind and solar power plant. To keep the plant from being damaged and prevent a decrease in tool performance, PLTH was developed based on the Internet of Things (IoT). IoT will later monitor the performance of the plant. In this study using the ESP32 TTGO SIM800L microcontroller, the sensors used were DC voltage sensors, current sensors (ACS712), wind speed sensors (anemometers), wind direction sensors (wind vanes), and water flow sensors. The research began with designing the relationship between components, working on monitoring and programming systems on software, installing outdoor sensors and installing monitoring systems, and ending with data observations. The results obtained on the observation of data, the best error percentage values are presented by various sensors with values less than 6%.

The possibility of blending acid tar waste with coal as a beneficiation method was explored in this work. It was essential to first establish the material properties of the acid tar and coal samples together with that of the blends in terms of proximate analyses. The acid tar waste to coal blending ratios of 3:1, 1:1 and 1:3 were used. It was observed that acid tar waste exhibited high volatile and moisture content with low ash and carbon content when compared with coal. When compared with coal; a 3:1 blending ratio exhibited 56.9 % and 7.6 % reduction in ash and fixed carbon respectively and on the contrary a 38.1 % increase in volatile matter was observed. An opposite trend was obtained with 1:3 blend ratio. The 1:1 blend ratio was found to decrease the volatile and ash content by 8.3 % and 52.7 % respectively whilst fixed carbon boosted by 4.2 %. The choice for the blending ratio to apply is a trade-off between fixed carbon and volatile matter. If volatile matter is of any significance then a 3:1 mixture would be ideal; such a mixture will aid in easier ignition of coal. On the other hand a 1:3 binary mixture yields a higher fixed carbon fraction, whose effect is to boost the calorific value of the fuel, an excellent factor for combustion. Overall however, it makes economic sense to blend coal with acid tar waste for enhancing sustainability.