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All Journal Buletin SWIMP Jurnal Polimesin
Sigit Deddy Purnomo Sidhi
Politeknik Kelautan dan Perikanan Sorong
Agriculture, Biological Sciences & Forestry Automotive Engineering Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Veterinary

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Peningkatan Hardskill Pembuatan Mesin Pelet Ikan Mandiri Bagi Kelompok Masyarakat Pembudidaya Ikan Nila Peningkatan Hardskill Pembuatan Mesin Pelet Ikan Mandiri Bagi Kelompok Masyarakat Pembudidaya Ikan Nila andreas pujianto; M. Zaki Latif A.; Sigit Deddy Purnomo Sidhi; Akhmad Nurfauzi; Djoko Prasetyo
Buletin SWIMP Vol 1 No 01: MAY 2021
Publisher : Politeknik Kelautan dan Perikanan Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (569.994 KB) | DOI: 10.15578/bs.v1i01.7

Abstract

The price of feed is one of the biggest contributors to production costs in fish farming. The purpose of this community service activity is to provide knowledge and skills on manufacturing independently fish pellet machines for the the tilapia farmer community in Klawasi village. The training is carried out by providing theoretical material about independent feed and pellet machine design as well as the practice of assembling pellet machine components and operating to test the performance of the pellet machine. The training was held at the Politeknik Kelutan dan Perikanan Sorong and was attended by 10 participants from the tilapia farmer community. The result of the training output is the production of two fish pellet machines that are ready to operate. The results of the satisfaction survey showed that 80% of participants strongly agreed about the good implementation of the training activities.
Improving the performance of microbubble through the modification and optimization of venturi-type generator Sigit Deddy Purnomo Sidhi; Andreas Pujianto; Akhmad Nurfauzi; Djoko Prasetyo; Basino Basino; Muhammad Alfan Ansori; Egbert Joshua Sirait; Bagas Prakoso
Jurnal Polimesin Vol 22, No 2 (2024): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i2.4267

Abstract

Venturi-type generators are recognized as one of the most promising microbubble generators with potential in various fields. However, there is still room for further optimization of their performance to meet the requirements of real applications, such as aeration systems or water treatment applications. This research modified the geometry of a venturi-type generator with specific dimensions:  a length of 80 mm, an inside diameter of 26 mm, a throat diameter of 7.2 mm, a convergent nozzle angle of 30°, a divergent diffuser angle of 30°, and an airflow inlet diameter of 6 mm. By varying the water flow rates (i.e., 22 L/min, 26 L/min, and 30 L/min) and air flow rates (i.e., 0.1 L/min, 0.2 L/min, and 0.3 L/min), the study observed the average diameter, size distribution, Standard Oxygen Transfer Rate (SOTR), and Standard Aeration Efficiency (SAE) of the generated microbubbles. This study aims to improve the performance of a microbubble generator, particularly by optimizing the relative size, distribution, and main parameters for real applications. The proposed modification and optimization successfully produced microbubbles with an average diameter of 180-450 μm. Furthermore, the optimal combinations of water and air flow rates (i.e., 30 L/min of water and 0.1 L/min of air) produced approximately 60% of microbubbles with a diameter of no more than 200 μm. These combinations also enable the delivery of a SOTR and SAE values of 0.94 kgO2/h and 1.73 kgO2/kWh, respectively.
Co-Authors Andreas Pujianto Bagas Prakoso Basino Basino Djoko Prasetyo Egbert Joshua Sirait M. Zaki Latif A. Muhammad Alfan Ansori Nurfauzi, Akhmad Pujianto, Andreas