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Synthesis of Calcium Glyceroxide Catalyst from Pensi Shells for CPO-Based Biodiesel Production Addin Akbar; Dedy Rahmad; Eko Supriadi; Dwi Kemala Putri
Jurnal Kimia Sains dan Aplikasi Vol 28, No 1 (2025): Volume 28 Issue 1 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.1.1-7

The synthesis of a calcium glyceroxide catalyst derived from pensi shells for biodiesel production using crude palm oil (CPO) has been successfully conducted. The catalyst was prepared via the wet impregnation method by reacting CaO with glycerol in methanol as a solvent for 5 hours at 65°C, with catalyst-to-glycerol ratios of 1:1, 1:1.5, and 1:2. The glycerol used was obtained from crude glycerol, a by-product of biodiesel transesterification. CaO was derived from the calcination of pensi shells at 1000°C. The synthesized catalyst was tested for activity in biodiesel production from CPO. The test parameters included catalyst concentrations of 1.5%, 2%, and 2.5%, reaction times of 2 hours and 4 hours, and oil-to-methanol molar ratios of 1:5. The biodiesel yield for a 2-hour reaction time at catalyst concentrations of 1.5%, 2%, and 2.5% was 56.32%, 54.80%, and 50.19%, respectively. For a 4-hour reaction time at the same concentrations, the biodiesel yields were 40.28%, 60.73%, and 65.98%, respectively. Catalyst characterization was performed using XRD, XRF, SEM, and FTIR to support the activity test data. SEM analysis visually confirmed the bonding between CaO and glycerol. XRD results revealed the highest peaks at 2θ angles of 37.621° for CaO and 34.101° for Ca(OH)2, indicating a bond formation between CaO and glycerol. XRF analysis determined a CaO concentration of 96.21%. FTIR analysis identified the presence of glycerol through dominant -OH and C-O groups. The quality of the resulting biodiesel was tested against SNI (Indonesian National Standard) parameters. The analysis showed the highest methyl ester content (95.6%) at a reaction time of 4 hours. The highest oxidation stability (10.77 hours) was observed at a reaction time of 2 hours. Additional results included an acid number of 0.1%, total glycerol content of 0.279%-b, free glycerol content of 0.018%-b, and viscosity at 40°C of 3.559 mm2/s. The quality test results demonstrated that several parameters met SNI biodiesel standards.

Pelatihan Pembuatan Virgin Coconut Oil Bagi Kelompok Petani Desa Sungai Sirah, Nagari Surantih, Kecamatan Sutera, Kabupaten Pesisir Selatan Ikhsandy, Ferry; Miftahurrahmah, Miftahurrahmah; Luthfi, Muhammad Zulfikar; Yahya, Agung Kurnia; Hibrah, Hibrah; N.H, Harmiwati; Supriadi, Eko; Oktria, Dandi; Surya, Dhanu Fransgio Pratama
Journal of Industrial Community Empowerment Vol 1, No 1 (2022): Published in April 2022
Publisher : Politeknik ATI Padang

West Sumatra has a high potential of coconut resources with most of it being processed for copra products. The pandemic situation in recent years has caused the price of copra products to fluctuate, so an alternative coconut processing is needed. Virgin Coconut Oil (VCO) is an alternative coconut product that can increase economic value of coconut and is needed as a supplement that can strengthen the body's immune system during the Covid-19 pandemic. One of the efforts to train the community to be able to process coconut into VCO is to conduct training activities that are directly located in the coconut farmer cluster, which is carried out in Sungai Sirah Village, South Coast District, West Sumatra. This community service activity aims to increase the competence of farmers in the village so that they can process the coconut produced into VCO, hence help their economy when the price of copra drops. The stages of the activity start from socialization, presentation on production process, and continued with demonstrating how to make VCO. Participants were divided into several small groups where they could immediately practice how to make this VCO with the correct fermentation steps. After the manufacturing process is well understood, the next step was training of how to do packaging and marketing. Farmers were trained on how to package products in order to get good quality product and then trained to sell VCO through online shop such as Facebook, Instagram, Tokopedia, etc. This activity helps add more insight in terms of processing and marketing, in which participants increase their knowledge and competence to form the basis for entrepreneurship of coconut processed products.

Design and Build a Manual Stirred Biodigester Using a 200 Liter Capacity Double Propeller Using Cow Manure and Rumen Raw Materials Rahman, Edriza; Nadya Rizki, Ailsya; Supriadi, Eko; Rosalina, Rosalina
Jurnal Multidisiplin Indonesia Vol. 3 No. 12 (2024): Jurnal Multidisiplin Indonesia
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jmi.v3i12.2073

Processing organic waste into renewable energy is an effective solution to reduce environmental impact and meet energy needs. This research aims to design and build a manually stirred biodigester using a double propeller system with a capacity of 200 liters. This biodigester is designed to process cow manure waste and rumen as the main raw material, utilizing the abundant and not yet optimal biomass potential. A manual stirring system with two propellers is implemented to improve the mixing efficiency of the substrate, so as to maximize the production of biogas. Tests are carried out to evaluate the performance of the equipment, including the biogas production capacity, the quality of the methane gas produced, and the efficiency of the fermentation process. The results of the study show that the designed biodigester is able to produce biogas effectively with methane levels that meet energy use standards. Innovations in manual stirrers using double propellers have been proven to increase the homogeneity of the substrate, accelerate fermentation times, and increase the volume of gases produced. This biodigester has the potential to be applied on a household and community scale, supporting efforts to use sustainable renewable energy while reducing environmental pollution due to organic waste. This research is expected to be a reference in the development of biodigester technology that is efficient and easy to apply in various regions.

Pelatihan Pembuatan Virgin Coconut Oil Bagi Kelompok Petani Nagari Surantih, Kecamatan Sutera, Kabupaten Pesisir Selatan Ikhsandy, Ferry; Miftahurrahmah, Miftahurrahmah; Luthfi, Muhammad Zulfikar; Yahya, Agung Kurnia; Hibrah, Hibrah; N. H. , Harmiwati; Supriadi, Eko; Oktria, Dandi; Surya, Dhanu Fransgio Pratama
Journal of Industrial Community Empowerment Vol. 1 No. 1 (2022)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v1i1.94

West Sumatra has a high potential of coconut resources with most of it being processed for copra products. The pandemic situation in recent years has caused the price of copra products to fluctuate, so an alternative coconut processing is needed. Virgin Coconut Oil (VCO) is an alternative coconut product that can increase economic value of coconut and is needed as a supplement that can strengthen the body's immune system during the Covid-19 pandemic. One of the efforts to train the community to be able to process coconut into VCO is to conduct training activities that are directly located in the coconut farmer cluster, which is carried out in Sungai Sirah Village, South Coast District, West Sumatra. This community service activity aims to increase the competence of farmers in the village so that they can process the coconut produced into VCO, hence help their economy when the price of copra drops. The stages of the activity start from socialization, presentation on production process, and continued with demonstrating how to make VCO. Participants were divided into several small groups where they could immediately practice how to make this VCO with the correct fermentation steps. After the manufacturing process is well understood, the next step was training of how to do packaging and marketing. Farmers were trained on how to package products in order to get good quality product and then trained to sell VCO through online shop such as Facebook, Instagram, Tokopedia, etc. This activity helps add more insight in terms of processing and marketing, in which participants increase their knowledge and competence to form the basis for entrepreneurship of coconut processed products.

Pemberdayaan Masyarakat Karibia melalui Pelatihan Pengolahan Mango Jelly dan Pemanfaatan Limbah Mangga Ekawati, Irna; Maryam, Maryam; Nadiyah, Khairun; Helmi, Adlina Safitri; Akli, Khairul; Nesti, Lisa; Edwar, Ester; Hasni, Dian; Supriadi, Eko
JICE : Journal of Industrial Community Empowerment Vol. 4 No. 2 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v4i2.53

The Caribbean region, despite its abundance of tropical agricultural commodities such as mangoes, continues to face challenges in product diversification and value-added processing. This community engagement program aimed to strengthen the productive capacity and economic empowerment of Caribbean communities—particularly small-scale farmers, agroindustry actors, and homemakers—through mango-based product development. Implemented by Politeknik ATI Padang in collaboration with the Non-Aligned Movement Center for South-South Technical Cooperation (NAM-CSSTC), the program was conducted virtually over two days in May 2025 using an integrated explicit–tacit knowledge transfer approach. Explicit knowledge was delivered through structured digital materials and video-based instruction, while tacit knowledge was reinforced through experiential learning, practical assignments, and interactive discussions. A total of 297 participants enrolled for the program, with 30 participants actively engaging through Zoom sessions and 267 participants accessing the training via YouTube livestreaming. The primary outcomes of the program included measurable improvements in participants’ technical competence, production readiness, and sustainability awareness. Evaluation results showed an increase in participants’ average scores from 84.4 (pre-test) to 89.2 (post-test), indicating enhanced understanding of mango jelly processing, packaging, waste utilization, and basic business planning. Moreover, participants successfully demonstrated their ability to independently produce mango jelly and apply organic waste management practices using mango peel residues. Beyond skill acquisition, the program fostered entrepreneurial motivation and promoted the adoption of circular economy principles at the community level. These findings highlight the effectiveness of virtual community empowerment initiatives in achieving tangible capacity-building outcomes and supporting sustainable, resource-based economic development across geographically dispersed regions.

MODIFIKASI ALAT PENGEMPA BIOBRIKET DENGAN MONITORING TEKANAN REAL TIME BERBASIS IOT Annisa Rahmawati; Eko Supriadi; Harmiwati NH
SAINTI: Majalah Ilmiah Teknologi Industri Vol. 22 No. 2 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/sainti.v22i2.3

Salah satu energi alternatif yang potensial untuk dikembangkan adalah biobriket. Biobriket merupakan bahan bakar padat berbasis biomassa yang dibuat dari limbah organik seperti serbuk kayu, sekam padi, dan limbah pertanian. Pemanfaatan biobriket tidak hanya mengurangi ketergantungan pada bahan bakar fosil, tetapi juga menjadi solusi pengelolaan limbah dan pengurangan emisi gas rumah kaca. Pada penelitian ini akan dicetak biobriket menggunakan modifikasi peralatan pengempa menggunakan monitoring tekanan operasi secara real time berbasis IoT (Internet of Things). Sensor tekanan yang dipasang pada sistem hidrolik diharapkan dapat membaca tekanan aktual secara tepat dan detail. Dengan demikian proses dapat dijaga dengan konstan dan diharapkan mampu meningkatkan konsistensi kualitas biobriket dari segi densitas, kadar air, volatile matter, dan nilai kalor, sekaligus mempercepat proses produksi. Dari penelitian yang dilakukan didapatkan tekanan optimal untuk pengempaan biobriket dengan bahan baku tempurung kelapa yaitu pada 80 Psia dengan komposisi perekat 5% didapatkan densitas sebesar 0,79 g/cm³. Dengan kondisi perekat optimum 5%, tekanan optimum 80 psia dan ukuran partikel 100 mesh didapatkan kualitas biobriket dengan kadar air 6,91 %, denistas 0,63 g/cm³, kadar abu 12%, volatil matter 15% dan fixed carbon pada 66,09 % memenuhi SNI 01-6235-2000.

Pemberdayaan Masyarakat Karibia melalui Pelatihan Pengolahan Mango Jelly dan Pemanfaatan Limbah Mangga Irna Ekawati; Maryam; Khairun Nadiyah; Adlina Safitri Helmi; Khairul Akli; Ester Edwar; Lisa Nesti; Dian Hasni; Eko Supriadi
JICE : Journal of Industrial Community Empowerment Vol. 4 No. 2 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v4i2.45

The Caribbean region, despite its abundance of tropical agricultural commodities such as mangoes, continues to face challenges in product diversification and value-added processing. This community engagement program aimed to strengthen the productive capacity and economic empowerment of Caribbean communities—particularly small-scale farmers, agroindustry actors, and homemakers—through mango-based product development. Implemented by Politeknik ATI Padang in collaboration with the Non-Aligned Movement Center for South-South Technical Cooperation (NAM-CSSTC), the program was conducted virtually over two days in May 2025 using an integrated explicit–tacit knowledge transfer approach. Explicit knowledge was delivered through structured digital materials and video-based instruction, while tacit knowledge was reinforced through experiential learning, practical assignments, and interactive discussions. A total of 297 participants enrolled for the program, with 30 participants actively engaging through Zoom sessions and 267 participants accessing the training via YouTube livestreaming. The primary outcomes of the program included measurable improvements in participants’ technical competence, production readiness, and sustainability awareness. Evaluation results showed an increase in participants’ average scores from 84.4 (pre-test) to 89.2 (post-test), indicating enhanced understanding of mango jelly processing, packaging, waste utilization, and basic business planning. Moreover, participants successfully demonstrated their ability to independently produce mango jelly and apply organic waste management practices using mango peel residues. Beyond skill acquisition, the program fostered entrepreneurial motivation and promoted the adoption of circular economy principles at the community level. These findings highlight the effectiveness of virtual community empowerment initiatives in achieving tangible capacity-building outcomes and supporting sustainable, resource-based economic development across geographically dispersed regions.

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