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All Journal Semesta Teknika Jurnal Pengabdian UntukMu NegeRI Jurnal Teknik Industri Terintegrasi (JUTIN) Jurnal Surya Teknika Jurnal Pengabdian Masyarakat Waradin Journal of Engineering Science and Technology Management JES-TM Social and Community Service
Lisa Legawati
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Religion Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences Other

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Pengembangan Katalis Water-Gas Shift: Perspektif dari Sistem Medium Temperature Shift (MTS) Liska, Salma; Sajida, Gita Nur; Legawati, Lisa; Suhendri, Suhendri; Meldha, Zuqni; Yolanda, Yogi; Hendri, Yola Bertilsya; Rusmana, Marcela Anandita
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 8 No. 3 (2025): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v8i3.48117

Abstract

The water-gas shift (WGS) reaction is a crucial process for increasing hydrogen (H₂) production by minimizing carbon monoxide (CO) content. It is widely applied in the petrochemical industry to reduce CO levels in syngas produced from hydrocarbon reforming. Conventionally, this reaction is conducted in two stages: high-temperature shift (HTS) and low-temperature shift (LTS). However, this approach presents both technical and economic limitations. To address these issues, catalysts capable of operating optimally at intermediate temperatures—referred to as medium-temperature shift (MTS)—have been developed. The scope of discussion in this article consists of catalyst development challenges such as sintering, deactivation, and side reactions. This review is intended to serve as a reference for the development of efficient WGS catalysts under MTS conditions, along with modification strategies aimed at enhancing their performance based on current research findings.
Optimalisasi Potensi Desa,Pengolahan Limbah Perkebunan Sawit Menjadi Briket Sebagai Energi Alternatif Yang Bernilai Ekonomi Tinggi Zidhan, Muhammad; Legawati, Lisa; Haura Arnel, Ashilah
Jurnal Pengabdian UntukMu NegeRI Vol. 7 No. 2 (2023): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jpumri.v7i2.5782

Abstract

Perkebunan kelapa sawit menghasilkan sisa atau limbah pasca panen yang belum dimanfaatkan secara optimal dan dibiarkan begitu saja hingga menumpuk dan membusuk di area perkebunan. kelompok 48 Desa Sungai Buluh tertarik untuk memberikan edukasi ke Masyarakat dalam pembuatan briket menggunankan limbah pelepah sawit yang diharapkan nantinya Masyarakat mampu memanfaatkan limbah pelepah sawit menjadi mata pencarian baru.Kegiatan yang menjadi program kerja utama yaitu mengoptimalkan potensi desa salah satunya dengan memanfaatkan limbah pelepah sawit menjadi produk bernilai ekonomi tinggi. Kegiatan awal yang dilakukan adalah memberikan sosialisasi kepada masyarakat secara langsung tentang potensi limbah perkebunan sawit dan cara pengolahan limbah pelepah sawit sehingga menghasilkan produk briket yang dapat dipasarkan dan digunakan untuk kebutuhan sehari-hari. program ini dimulai dengan mengumpulkan beberapa limbah perkebunan sawit berupa pelepah sawit. Pelepah sawit kemudian dijemur dan dikeringkan terlebih dahulu. Setelah itu, pelepah sawit yang sudah kering dibakar dan dihaluskan menjadi kecil hingga akhirnya dibentuk. tahap uji coba hasil briket yang sudah jadi dilakukan di sekitar rumah warga yang sasaran utamanya adalah UMKM Desa Sungai Buluh. Melalui pembuatan produk briket ini dapat membantu warga desa memanfaatkan limbah pelepah sawit yang tidak terpakai.
Sosialisasi Pemanfaatan Bonggol Jagung Menjadi Briket Arang Sebagai Sumber Energi Ermal, Dini Aulia Sari; Lisa Legawati; Dwi Annisa Fithry; Rozar Rayendra; Jusnita; D.d Zulfa; Ardian Pratama
Jurnal Pengabdian UntukMu NegeRI Vol. 9 No. 2 (2025): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jpumri.v9i2.8962

Abstract

Kegiatan pengabdian masyarakat ini bertujuan untuk meningkatkan perekonomian masyarakat melalui pemanfaatan limbah bonggol jagung menjadi briket arang sebagai sumber energi alternatif. Kegiatan ini dilakukan karena adanya potensi limbah bonggol jagung yang melimpah di kawasan Kayu Manis, Payung Sekaki, Pekanbaru sehingga dapat dimanfaatkan untuk memenuhi kebutuhan sumber daya energy yang lebih ramah lingkungan. Metode yang digunakan pada kegiatan pengabdian ini dengan memberikan penyuluhan teknis kepada ibu-ibu rumah tangga tentang proses pengolahan bonggol jagung yang terdiri dari beberapa proses yaitu pengeringan limbah bonggol jagung, pencacahan, pembakaran, pencampuran dengan perekat dan pencetakan briket arang dari limbah bonggol jagung. Hasil dari kegiatan ini menunjukkan adanya peningkatan kesadaran lingkungan yang terlihat dari antusiasme peserta yang tinggi, serta adanya motivasi untuk mengembangkan usaha melalui pemanfaatan limbah. Namun, program ini masih memerlukan dukungan dan implementasi praktek secara berkelanjutan. Kegiatan pengabdian ini juga diharapkan dapatmenjadi langkah awal dalam pemanfaatan limbah organic menjadi sumber energy alternative yang ramah lingkungan, serta memberikan dampak positif terhadap perekonomian masyarakat setempat.
Review dalam Pembuatan Arang Aktif Berbasis Limbah Pertanian Dengan Microwave Fithry, Dwi Annisa; Jusnita, Jusnita; Legawati, Lisa; Ermal, Dini Aulia Sari; Prayogo, Hidayat
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 6 No. 1 (2023): April 2023
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v6i1.15632

Abstract

Conventional handling of biomass waste, such as burning biomass, can cause other problems, and is not effective. Another common handling method is utilizing biomass waste. Second, conventional handling does not significantly reduce the amount of biomass waste. Microwave heating uses several power parameters and activation time to determine the effect of power and activation time on iodine number and surface area [25]. Activated charcoal is used as a raw material because it is hard charcoal and has good quality, and microwaves are used because it saves energy and time. Microwave treatment to study the effect of concentration and time of microwave irradiation separately on iodine number and adsorption capacity. The results of the FTIR spectra show that activated carbon has an –OH group. The results of the adsorption test showed that the activated carbon that had been prepared was able to absorb ions at the optimum concentration. Adsorption isotherm studies were carried out using the Langmuir equation. Microwave irradiation time also has a significant effect on the quality of activated carbon in the microwave irradiation time range
Enhancing Community Awareness Through Waste Bin Provision at Pangkalan Bunut Market to Achieve a Clean and Healthy Environment Legawati, Lisa; Yolanda, Yogi; Meldha, Zuqni; Sembiring, Maria Peratenta; Zulfansyah, Zulfansyah; Ermal, Dini Aulia Sari
Journal of Social and Community Service Vol. 4 No. 3 (2025): November 2025
Publisher : Faculty of Engineering University of Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Environmental awareness and concern for cleanliness remain common challenges, not only in urban areas but also in rural communities. In Pangkalan Bunut Village, the issue of poor waste management persists, largely due to limited community awareness and the lack of adequate waste disposal facilities. To address this problem, our Community Service Team implemented a program to provide waste bins in the Pangkalan Bunut Market. This initiative aimed to encourage proper waste disposal practices, improve environmental awareness, and promote a clean and healthy environment. The program produced several positive outcomes: (1) increasing community understanding of the importance of waste management and environmental care; (2) providing accessible waste bins at the market to support cleaner surroundings; and (3) fostering behavioral change, as residents became more aware of the importance of proper waste disposal. This initiative is expected to serve as a model for sustaining cleanliness and environmental health in Pangkalan Bunut Village.
Tantangan Implementasi Program B40 di Indonesia: Tinjauan Teknis dan Ketersediaan Bahan Baku Biodiesel Eka Alel, Ariya; Hastuti, Ririn Puji; Legawati, Lisa
SURYA TEKNIKA Vol 12 No 2 (2025): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v12i2.10770

Abstract

The B40 program is a continuation of Indonesia’s mandatory biodiesel policy, which requires blending 40% palm oil–based biodiesel with 60% conventional diesel fuel. This program aims to reduce dependence on fossil fuel imports while supporting national greenhouse gas emission reduction targets. This study analyzes the challenges of B40 implementation in Indonesia, focusing on feedstock availability as well as technical aspects of biodiesel production and distribution. The research employs a desk study approach using secondary data from GAPKI, BPDPKS, the Ministry of Energy and Mineral Resources, and relevant scientific literature. The results indicate that Indonesia’s crude palm oil (CPO) production in the first half of 2025 reached approximately 27.89 million tons, while the CPO requirement for B40 is projected at around 13.5 million tons. The installed capacity of the national biodiesel industry is about 20 million kiloliters per year, exceeding the projected B40 biodiesel demand of 15.6 million kiloliters. However, technical challenges remain, including biodiesel quality issues, dependence on imported methanol, and distribution constraints in remote regions. Overall, the B40 program has the potential to reduce emissions by approximately 25–28 million tons of CO₂-equivalent per year and contribute to Indonesia’s energy transition.
Combination of Starch and Pectin as Raw Materials for Making Edible Film Meldha, Zuqni; Fermi, Muhammad Iwan; Legawati, Lisa; Liska, Salma; Yolanda, Yogi; Hendri, Yola bertilsya; Amri, Idral
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i1.300

Abstract

Food spoilage, driven by factors like microbes and oxygen, is a major challenge in food preservation. Edible films offer an eco-friendly and biodegradable solution, acting as a protective barrier that reduces waste and extends a product's shelf life. While starch is a common and affordable material for these films, it has limitations, including poor water resistance and brittleness. This study investigates combining starch and pectin to create a superior composite edible film. This approach leverages the synergistic interaction between the two materials, which forms a more stable, dense structure through hydrogen bonds. This combination enhances key properties like tensile strength, flexibility, and water vapor resistance. The specific structure of the pectin, such as its level of methylation, is crucial, as it directly impacts how well it blends with starch and the film's final performance. By carefully controlling these interactions, the resulting edible films can achieve properties comparable to some fossil-based plastics, positioning them as a promising and sustainable alternative for food packaging. To support these findings, this research will analyze and review key performance factors from studies published over the past five years.
Techno-Economic Analysis of Betaine Surfactant Production from Hydrogenated Palm Kernel Oil: A Preliminary Plant Design Oktariandi. M, Vito; Agustia Putri, Wahyuni; Saridiyah, Saridiyah; Legawati, Lisa; Zulfansyah, Zulfansyah
SURYA TEKNIKA Vol 13 No 1 (2026): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v13i1.11248

Abstract

Indonesia's high dependency on betaine surfactant imports, which grow at 8.15% per year, necessitates the development of domestic production based on local raw materials. This study aims to design an Amidopropyl Betaine plant from Hydrogenated Palm Kernel Oil (HPKO) with a capacity of 20,000 tons per year. The production process consists of three main stages: amidation reaction (85% conversion), separation and purification via distillation, and carboxymethylation reaction (99% conversion). An economic feasibility analysis yielded a Net Present Value (NPV) of Rp 325 billion, Return on Investment (ROI) of 36.93%, Payback Period (PBP) of 1.53 years, Internal Rate of Return (IRR) of  29,38%, and Break-Even Point (BEP) of 35.84%, indicating that the plant is highly feasible and profitable. This study concludes that the establishment of an HPKO-based betaine surfactant plant is not only techno- economically feasible but also strategic for reducing import dependency and adding value to the national palm oil industry.
Teknologi Modifikasi Fisik Heat Moisture Treatment (HMT) pada Tepung Beras dan Tepung Sorgum: Kajian Sistematis Parameter Proses, Transformasi Struktur Granula Pati dan Prospek Skalabilitas Industri Puji Hastuti, Ririn; Alel, Ariya Eka; Alfarisi, Cory Dian; Legawati, Lisa; Aziz, Yelmida
SURYA TEKNIKA Vol 13 No 1 (2026): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v13i1.11604

Abstract

Heat Moisture Treatment (HMT) is a clean-label, residue-free physical starch modification technique that serves as a strategic solution for food diversification, aiming to reduce national reliance on imported wheat, which reached USD 2.2 billion in 2022. This systematic review of 45 selected scientific publications, out of 65 initially screened articles, evaluates the impact of HMT on rice and sorghum flour characteristics. Synthesized results indicate that HMT consistently increases gelatinization temperature (To up by 3 - 8°C), reduces peak viscosity (15 - 30%), and boosts resistant starch content from 3 - 5% to 8 - 15%. In sorghum flour, the interaction between starch and non-starch components, particularly kafirin proteins, significantly modifies the HMT response compared to pure sorghum starch. This study highlights critical research gaps, specifically regarding the need for optimal HMT parameters tailored to Indonesian local varieties and the necessity of comprehensive techno-economic analysis to facilitate industrial-scale implementation.
Co-Authors Aderiani, Suci Agustia Putri, Wahyuni Alfarisi, Cory Dian Alltop Amri Ya Habib Alva Dela, Gita Amri, Idral Ardian Pratama Aziz, Yelmida Cici Maarasyid D.d Zulfa Delvina Sari Dini Aulia Sari Ermal Dwi Annisa Fithry Eka Alel, Ariya Febrian, Amanda Fithry, Dwi Annisa Fitri, Suchy Arum Gusmita Putri, Messy Hadi Purwanto Hari Rionaldo Hastuti, Ririn Puji Haura Arnel, Ashilah Hendri, Yola Bertilsya Idayu, Ida Idral Amri Israyandi Israyandi Jusnita Jusnita Jusnita, Jusnita Luthfi, Alif M. Iwan Fermi Maria Peratenta Sembiring Nirwana Nirwana Nugraha, Mohd Farhan Oktariandi. M, Vito Olivia, Cindy Prayogo, Hidayat Puji Hastuti, Ririn Ramadhani, Shafira Rachma Rawadi, Mhd Raihan Rawadi, Raihan Roza, Roza Rozar Rayendra Rusmana, Marcela Anandita Sajida, Gita Nur Salma Liska Salsabila, Naia Saridiyah, Saridiyah Suchy Arum Fitri Suci Aderiani Suhendri Suhendri Syamsu Herman Viona Aulia Rahmi Yayan Satria Yolanda, Yogi Zafira, Nesa Zidhan, Muhammad Zulfansyah Zulfansyah Zulfansyah Zulfansyah Zulfansyah Zuqni Meldha