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All Journal Jurnal Sains dan Teknologi Media Mesin: Majalah Teknik Mesin Turbo : Jurnal Program Studi Teknik Mesin Jurnal Penelitian Pendidikan IPA (JPPIPA) Machine : Jurnal Teknik Mesin JMM (Jurnal Masyarakat Mandiri) Al-Khidmah BULETIN AL-RIBAATH Jurnal Abdi Insani Dinamis Suara Teknik : Jurnal Ilmiah International Journal of Industrial Innovation and Mechanical Engineering International Journal of Mechanical, Electrical and Civil Engineering
Doddy Irawan
Universitas Muhammadiyah Pontianak
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Sintesis dan Karakterisasi Hidrogel Berbasis Selulosa dari Kulit Durian untuk Penjernihan Air Gambut Fadhilah, Raudhatul; Irawan, Doddy; Kurniati, Tuti
Jurnal Penelitian Pendidikan IPA Vol 11 No 8 (2025): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i8.11514

Abstract

Peat water in Indonesia, abundant in swamp regions, is acidic and rich in humic substances and Fe²⁺ ions, making it unsuitable for direct use. This study explores a sustainable approach to treating peat water using hydrogel synthesized from durian rind (Durio zibethinus), an agricultural waste rich in cellulose. Cellulose was extracted via alkali and bleaching treatment, then crosslinked with chitosan in a NaOH/urea solvent system to form a biodegradable, porous hydrogel. The hydrogel exhibited a swelling ratio of 857% and a gel content of 98.23%, indicating high hydrophilicity and network integrity. Adsorption experiments demonstrated removal efficiencies of 98.96% for methylene blue and 25% for Fe²⁺. The high dye removal at low concentrations suggests strong interaction between hydrogel functional groups (–OH, –NH₂) and organic molecules, while Fe²⁺ removal was attributed to electrostatic interaction and potential chelation. Adsorption followed pseudo-second-order kinetics, indicating chemisorption as the rate-limiting step. These results suggest that durian rind hydrogel is a promising low-cost material for organic and inorganic pollutant removal in acidic water systems. This study highlights the potential of agro-waste valorization in developing eco-friendly materials for water purification.
Design and Construction of a Turbine Pump as Laboratory Scale Micro Hydro Electricity Learning Media Gunarto; Irawan, Doddy; Julianto, Eko
JST (Jurnal Sains dan Teknologi) Vol. 12 No. 2 (2023): July
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v12i2.46065

Abstract

Lack of understanding of students about renewable energy can be produced from pumps, namely electrical energy. The energy produced by this pump is beneficial for rural areas that do not have electricity.  The purpose of this research is to modify the pump as a turbine for a micro-hydro power plant which can be used by students of the Mechanical Engineering Department, the University of Muhammadiyah Pontianak as learning media in the field of fluid machines and laboratory-scale energy conversion machines. The research subjects were 15 students of mechanical engineering and pumps that were converted into turbines to generate electricity. The data collected first comes from the performance test of a pump that has been converted into a pump as a turbine. Further data was obtained from students through a pretest with a conceptual type of pump used as a power plant. Then after the pretest, students were treated by using and operating a pump as a turbine as a learning media. From this media, students must also explain the concept and how the pump as a turbine can produce electrical energy in writing. The student's written results obtained were analyzed to determine the effect of the pump as turbine model on students' understanding of conceptual analysis. The result of this research is a pump that has been converted into a pump as the turbine. In addition, as a simple practical tool to test the performance of the pump as a turbine. There was an increase in students' understanding in terms of the ability to describe the concept of power generation sources from pumps and analyze the process and workings of the pump as a turbine to produce electrical energy.
ANALISA KEKERASAN MATA PISAU BAHAN ST 60 PADA MESIN PEMOTONG ZINCALUME DENGAN PROSES PERLAKUAN PANAS (HEAT TREATMENT) Julianto, Eko; Ramadhan, Rahmad; Irawan, Doddy; Sarwono, Eko
Suara Teknik : Jurnal Ilmiah Vol 10 No 2 (2019): Suara Teknik: Jurnal Ilmiah
Publisher : Fakultas Teknik UM Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29406/stek.v10i2.1544

Abstract

incalume cutting machine is the right machine to accelerate a production in a cutting system by using the main tool of an electric motor. In this study testing of the blades for cutting zincalume, in this test heat treatment (Heat Treatment) is done by cooling used oil to find out the hardness of the blade. Subsequent testing includes, among others: Hardness Testing, Microstructure and Composition to determine the comparison of violence. The analysis technique used is descriptive analysis that describes the data obtained, then explained in the form of sentences and simple graphs that are easily understood by the reader. From the results of the test, get a comparison of the hardness of the St 60 blade before the Heat Treatment and after the Heat Treatment is 10 kgf.
TRANSFER TEKNOLOGI OTOMATISASI PROSES PENGOLAHAN NIRA KELAPA MENJADI GULA KELAPA PADA KELOMPOK TANI KELAPA JAYA Fadhilah, Raudhatul; Alfian, Rudi; Gunarto; Irawan, Doddy
Jurnal Abdi Insani Vol 11 No 1 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i1.1149

Abstract

Kelapa Jaya is a peasant group that uses nira coconut to make coconut sugar. The production process is still traditional. The farmer's group is still using a manual mixer so it takes a long complaint time, six hours. Besides, the product still does not have a brand so its sales value is still low. Therefore, it is necessary to transfer technology to accelerate the production process and increase the sales value of the product. This community partnership program (PKM) aims to: (1) transfer the efficiency technology of production processes with automatic complaints. (2) increase the sales value of products with labelling and merck. This PKM uses an action or participatory approach with the PKM team acting as a trainer, accompanist, observer, supervisor, and evaluator of the success of the program carried out by the farming group. PKM results show that the automatic nira sugar mixer can accelerate the process of grinding by 17%. The device can accelerate the re-grinding process from 6 hours to 5 hours. This can happen because of the uniform grinding and heating so that the nira clamps faster. There has been an increase in the knowledge and skills of each partner by 70%. Partners have been able to increase the sales value of the product by giving the brand and label on the coconut sugar products sold. A survey of partners showed that 100% of participants were satisfied with the program. The automatic Nira mixer successfully accelerates the coconut sugar production process. Partners have been able to produce cocoa sugar products faster and sell products with attractive packaging.
TRANSFORMASI USAHA SAMPAN PADA KELOMPOK MASYARAKAT SUNGAI MELALUI OTOMATISASI DAN STRATEGI PEMASARAN INOVATIF Sukardi, Sukardi; Fadhilah, Raudhatul; Gunarto, Gunarto; Irawan, Doddy; Alfian, Rudi
Jurnal Abdi Insani Vol 11 No 3 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i3.1949

Abstract

Area-based development emphasizes the optimal management of local resources to achieve community welfare. Kampung Beting, Pontianak, has great potential in transportation and river tourism but is hindered by a negative stigma as a center for drug trafficking. Through community service programs, business transformation is applied to the boat mining group with automation, installing waterproof canopies, using solar cell lights, and rebranding. The results show increased operational efficiency, revenue, and a regional image change. Innovative marketing strategies that capitalize on historical and cultural potential have successfully enhanced tourist attraction and local community welfare.
Co-Authors Alfian, Rudi Apri Rahmadi Asrul Abdullah Bagus Rahardian Dedy Alamsyah Dewi, Ria Risti Komala Eko Julianto Eko Sanjaya Eko Sarwono Evan Susanto Fadhilah, Raudhatul Fahrezi, Dian Fahrurrozi Fahrurrozi Fasya, Muhammad Firmansyah, Arfin Fuadzen Fuadzen Fuazen Fuazen Govari, Muhammad Khoirul Gunarto Gunarto Gunarto Gunarto Gunarto Iwan, Muhammad Kadeni Mulhardi Bowo Linda Suwarni Miftahuljannah Miftahuljannah MULYADI Mursalin . Mury Rahadi Nasution, Ahmad Yunus Neni Triana Rahardian, Bagus Ramadhan, Rahmad Ripandu Sasmeidy Selviana Solehudin An Nur Suje'i Suje'i Sukardi Sukardi Tuti Kurniati Waspodo Waspodo Waspodo, Waspodo