Adanya inovasi memungkinkan suatu negara mencapai peningkatan ekonomi baik melalui proses produksi atau dengan mempromosikan metode manufacturing terbarukan. Dengan semakin berkembangnya teknologi, semakin bertambah pula mesin-mesin canggih yang digunakan untuk membantu proses produksi suatu industri. Mesin tersebut tentunya membutuhkan maintenance secara berkala. Sebagian besar industri terutama kertas melakukan perawatan tersebut secara manual. Oleh karena itu, diperlukan Monitoring & Repairing Hydroulic dan Pneumatic Menggunakan Smartphone Berbasis QR-Code di Industri Kertas untuk mempermudah operator atau pengguna mesin dalam melakukan cheklist secara berkala. Penelitian ini diawali dengan menyiapkan file berupa dokumen Monitoring & Repairing Hydroulic dan Pneumatic. Kemudian membuat QR-Code melalui Aplikasi Printer Brother. Dari penelitian ini diharapkan dapat mempermudah cheklist perawatan Monitoring & Repairing Hydroulic dan Pneumatic.

Tofu liquid waste contains organic material, namely BOD which is quite high, if it is directly discharged into water bodies, it will reduce the carrying capacity of the environment. This causes the carrying capacity of the environment to decrease and ecosystem performance to become unbalanced, so that further processing is needed, namely Resin Immobilized Photocatalyst Technology (RIPT). In this study, the BOD reduction process was carried out with resin, photocatalyst, and immobilization. The process of immobilizing the catalyst against the resin aims to expand the surface and maintain photocatalyst activity. The type of catalyst used is ZnO and TiO2. After obtaining the RIP (Resin Immobilized Photocatalyst), then the RIP was added to the wastewater and the BOD concentration in the tofu wastewater was calculated. The resin capacity is calculated with the aim of knowing the ability of the resin to reduce the concentration of BOD. From the research that has been done, it can be concluded that the highest resin capacity when using ZnO catalyst is 0.3159 g/L and 0.2806 g/L using TiO2. The effluent parameter concentration is directly proportional to the resin capacity. As the sampling time increases, the resin's ability decreases.

Pembangkit Listrik Tenaga Angin (PLTA) merupakan salah satu sumber energi alternatif terbarukan yang ramah lingkungan. Pada penelitian ini dilakukan pembuatan rancangan sistem pembangkit listrik mandiri dengan menggunakan turbin angin sumbu horizontal. Penelitian ini bertujuan membuat beberapa perencanaan yang komprehensif untuk meningkatkan efikasi dan efisiensi pembangkit listrik di beberapa daerah, antara lain pemilihan turbin angin berdasarkan kondisi setempat, pemilihan material, dan optimalisasi daya, tanaman untuk instalasi. Kecepatan angin rata-rata yang diperoleh sekitar 10 m/s. Bilah sudu yang digunakan yaitu kategori thick-airfoil family for small blades dengan tipe NREL S822 dan NREL S823. Berat turbin yang didapatkan dari hasil perhitungan sebesar 12,759 kgm/s2. Turbin ini terdapat generatorarus bolak-balik, yang dapat mengubah energi potensial angin menjadi energi mekanik untuk menghasilkan energi listrik searah (DC), digerakkan oleh poros dan katrol turbin angin, yang merupakan penerus putaran angin yang mengalir. Kepadatan bahan yang digunakan memiliki dampak yang signifikan pada bagaimana turbin angin berputar. Karena kekuatan dan ketahanan cuacanya, bahan kincir angin resin lebih efisien daripada bahan lainnya.

The energy crisis is a severe problem facing the world, including Indonesia. Along with the times, innovation is needed to implement sustainable energy. Non-fossil energy sources have not been widely used, and efforts are still needed to utilize these energy sources. The waterwheel was the first device used in water production. One of the innovations for the sustainability of non-fossil energy is to make a waterwheel. There are still several waterwheels in Indonesia, but an investigation is needed to determine their condition. So in this study, investigating the breastshot water wheel uses a nozzle-based construction with variations in the degree of inclination of the spray against the TSR value. The results showed that the greater the inclination of the nozzle angle, the higher the velocity of the water flow when it enters the wheel. Adding water speed to this wheel will increase the momentum and tangential force. An increase in the tangential force will increase the wheel's torque so that the wheel strength will increase. This increase in power will, of course, result in greater efficiency, thereby increasing the tip speed ratio (TSR).

The hydraulic system is an energy transmission system utilizing liquid fluids. Liquids possess a characteristic different from solids in their inability to withstand shear stress. The employed methodology is qualitative research, also referred to as naturalistic qualitative research, which entails a natural implementation without manipulating circumstances. This study aims to identify the causes of damage to the hydraulic system in the press section machine, along with implementing appropriate corrective measures, while examining the hydraulic functioning of the press section machine. The research problem specifically focuses on analyzing the damage to the hydraulic cylinder and addressing cylinder seal failure. The damage results from seal wrinkling caused by aging, heat and wear. It is important to ensure that the hydrostatic test pressure is carried out at pressures up to 20 MPa with a holding time of at least 30 seconds. This examination ensures that the hydraulic roll press problem has been fully resolved and will not reoccur. Hydraulic systems offer numerous advantages as an energy source in various applications. These advantages include their lightweight nature, ease of installation, and low maintenance requirements. Inadequate performance in the hydraulic roller pressure section is attributed to a hydraulic cylinder seal that does not meet the specified standards, necessitating replacement with a suitable seal.