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Analisis Pengaruh Variasi Komposisi Bahan Baku Terhadap Kualitas Briket Dalam Aplikasi Pembakaran Aulia, M. Dava; Nahar, Nahar; Sariadi, Sariadi
Jurnal Riset, Inovasi, Teknologi & Terapan Vol 3, No 2 (2025): Juni
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/ristera.v3i2.7441

Abstract

This study examines the characteristics of briquettes from the composition of coffee grounds, wood powder and coconut shells using adhesive variations. This study was designed using independent variables, namely variations in the composition of raw materials using samples (A, B, C) % and adhesives (10, 12, 15). The raw materials are carbonized at a temperature of 300°C.  The process of making briquettes begins using charcoal crushing and uniformity of charcoal particle sizes to 40/60 mesh, charcoal mixed with tapioca flour as the adhesive material, then briquette dough is formed and molded using a pressure of 7 bars and dried in an oven at a temperature of 105°C for 2 hours. Furthermore, charcoal is characterized including 5 test parameters, namely moisture content, ash content, calorific value and combustion rate, then the best results are analyzed by Thermal Gravimetry Analysis (TGA). The best results obtained from this study were in the form of B2 samples using a ratio of 35 : 65 for coffee grounds: coconut shells using an adhesive concentration of 12%. The moisture content value was 6.12%, the ash content was 6.21%, the burning rate was 0.192 grams/minute and the calorific value was 6067.03 cal/g. The results obtained in this study stated that the moisture content, ash content, and calorific value had met SNI 01-6235-2000. The conversion of the calorific value of 1 kg of arabica briquettes creates an electric power of 6,683 kWh/kg, so to get 1 kWh of electrical energy requires 0.142 kg.
Pemanfaatan Air Kelapa dan Tepung Tapioka sebagai Bahan Baku Pembuatan Kertas Ramah Lingkungan dengan Aktivator Acetobacter Xylinum Safida, Qadrun Hanan; Harunsyah, Harunsyah; Nahar, Nahar
Jurnal Teknologi Vol 25, No 3 (2025): Desember 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i3.7855

Abstract

The use of cellulose derived from wood is increasing every year in Indonesia. This causes environmental damage that occurs continuously. In this research, paper making was carried out using coconut water and tapioca flour as raw materials as well as bacterial cellulose activator so that it is more environmentally friendly. The aim of this research is to determine the effect of variations in the mass of microbial cellulose and tapioca flour on the paper produced. The variables used in this research were the mass of microbial cellulose of 70, 75, 80, 85 90, 85 and 90 grams with variations in tapioca flour adhesive of 10, 15, 20, 25 and 30 grams. Next, the resulting paper is subjected to a grammage test, tensile strength test, water content test, functional group test (FTIR) and SEM test. In the grammage test, variations in the mass of microbial cellulose of 90 grams with a mass of tapioca flour of 30 grams had a higher grammage value than the others, namely 460 g/m2. In the tensile strength test, the highest value was in the variation of microbial cellulose mass of 80 grams with a mass of 10 grams of tapioca flour with a value of 0.930522 MPa, while in the water content test the highest value was in the variation of microbial cellulose mass of 90 grams with a mass of 30 grams of tapioca starch with a value of 17.42%.
Pembuatan Pembersih Lantai Alami dengan Ekstraksi Daun Sirih (Piper Betle L.) dan Serai Wangi (Cymbopogon Bernardus L.) terhadap Aktivitas Bakteri Tussakinah, Jaida; Ridwan, Ridwan; Nahar, Nahar
Jurnal Teknologi Vol 26, No 1 (2026): April 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i1.8970

Abstract

This study aims to evaluate the effect of maceration time and composition ratio of betel leaf (Piper betle L.) and lemongrass (Cymbopogon nardus) extracts on the characteristics and antibacterial activity of natural floor cleaners. The extraction method used was maceration with soaking time variations of 2–6 days and extract composition ratios of 1:0, 0:1, 1:1, 1:2, and 2:1. The parameters analyzed included pH, density, organoleptic properties, and antibacterial activity using the colony counter method. The results showed that the pH increased from 5.2 to 7.2 with longer maceration time, while the density remained relatively stable in the range of 0.90–0.93 g/mL. Antibacterial activity also increased with extraction time, with the highest effectiveness observed at 6 days of maceration, achieving a bacterial reduction of 66.41%. Organoleptic evaluation indicated that the product was generally acceptable to panelists, with neutral to favorable responses. The optimal formulation was obtained at 6 days of maceration with a 1:2 ratio of betel leaf to lemongrass extract, producing favorable physicochemical properties and the highest antibacterial activity. This study demonstrates the potential of natural ingredients as eco-friendly and safe alternatives for floor cleaning products.
Utilization of Bidara Leaf Extract (Ziziphus mauritiana Lamk) as a Body Scrub For Skin Care Yulia, Agna Safira; Dewi, Ratni; Nahar, Nahar; Sari, Ratna
Jurnal Teknologi Vol 26, No 1 (2026): April 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i1.8683

Abstract

Body scrub is a skincare product designed to exfoliate dead skin cells. Bidara leaf extract (Ziziphus mauritiana Lamk) was selected for its flavonoid, saponin, and tannin content, which contribute to antibacterial and antioxidant properties, while Epsom salt functions as an exfoliating agent that aids in dead skin removal and enhance skin regeneration. This study involved variations in bidara leaf extract concentration (0–5%) and Epsom salt concentration (10–50%). The formulations were evaluated through physical quality tests, including pH, homogeneity, adhesion, spreadability, organoleptic properties, antibacterial activity, and antioxidant activity. Results indicated that the formulation with 1% bidara leaf extract and 20% Epsom salt yielded the best outcomes, with a pH of 5.2 (compliant with SNI standards for topical preparations), good homogeneity, soft texture, and high panelist acceptance, particularly for sensitive skin. Antibacterial testing revealed the highest activity at 1% extract concentration, with an inhibition zone of 23 mm against Staphylococcus aureus. Antioxidant activity demonstrated free radical inhibition with an IC50 value of 18.94 µg/mL. These findings suggest that body scrub formulations incorporating bidara leaf extract and Epsom salt hold potential as natural, effective, and environmentally friendly skincare products.
Co-Authors A, Bakhtiar Alfian Putra Amri Amri Anisah, Yuli Anwar Anwar Arhami, Muhammad Ariani, Nita Ariefin, Ariefin Aulia, M. Dava Dewi, Ratni Diana, Selvie E. Elwina Elfiana Elfiana, Elfiana Fachraniah, Fachraniah Faisal Abdullah Halim Zaini, Halim Harunsyah, Harunsyah Humairah, Amanda Indra Mawardi Irwan Irwan Lukman Hakim M. Yunus M.T., Ridwan, Muhammad Hatta Muhammad Reza Zulman Nurdin, Irwan Pardi Pardi, Pardi Rahmi, Nur Atikah Ratna Sari Ridwan, Ridwan Safida, Qadrun Hanan Safriadi Safriadi Sami, Muhamma Sariadi Sariadi Syafruddin Syafruddin Taufik Taufik Turmizi, Turmizi Tussakinah, Jaida Uswatun Hasanah Yulia, Agna Safira Zulkifli Zulkifli