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Jurnal Sains Teknologi dan Lingkungan (JSTL)
Published by Universitas Mataram
ISSN : 24770329     EISSN : 24770310     DOI : -
Core Subject : Health, Science, Agriculture,
Agriculture, Biological Sciences & Forestry Computer Science & IT Public Health
Jurnal Sains Teknologi dan Lingkungan (JSTL), merupakan media untuk publikasi tulisan asli yang berkaitan dengan sains teknologi dan lingkungan baik dalam Bahasa Indonesia maupun Bahasa Inggris. Jurnal Sains Teknologi dan Lingkungan (JSTL) merupakan jurnal ilmiah terbitan berkala dua kali setahun (Juni dan Desember).
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Articles 335 Documents
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Manajemen Pengolahan Limbah Pabrik Gula Melalui Perhitungan Potensi dan Analisis Risiko untuk Mengurangi Dampak Pencemaran Lingkungan Kusuma, Yudha Adi; Khoiroh, Siti Muhimatul
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 2 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i2.425

Abstract

Sugar factories process sugar cane into staples. Processing sugar cane into sugar cane can have an environmental impact. This is also experienced by PG XYZ during the milling period. The purpose of the research at PG XYZ is to measure the environmental impact of the sugar production process through life cycle assessment and risk management. The results of the life cycle assessment study showed that the two highest impacts of the sugar production process were climate change and respiratory inorganics. The results of the life cycle assessment study became a parameter in the risk management analysis. The results of the risk analysis obtained 2 extreme category sub-risks, 3 high category sub-risks, 14 medium category sub-risks, and 17 low category sub-risks.
Crystalline Properties of Jambu (Syzygium aqueum (Burm. f.) Alston) and Jackfruit (Artocarpus heterophyllus) Seed Starches: An XRD Spectroscopic Study Wattimena, Synodalia; Patty, Philipus
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 3 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i3.818

Abstract

Starch, a complex carbohydrate found in plants, has become an alternative raw material to make plastics (bioplastics). Bioplastics have been intensively used to replace conventional plastics, which cannot be degraded and thus cause environmental problems. Therefore, starch has been the focus of many studies, where researchers study its properties, such as crystalline properties. These properties influence the properties of starch-based bioplastics: their mechanical strength, water resistance, and degradation rate are affected by the arrangement of starch molecules into crystalline structures. This study aims to characterize crystalline properties of starches of jambu fruit (Syzygium aqueum (Burm. f.) Alston) and jackfruit seeds (Artocarpus heterophyllus). For this purpose, X-ray diffraction (XRD) spectroscopy was used. The results show that the starches of jambu and jackfruit fruit seeds belong to different types: B-type starch for jambu and A-type starch for jackfruit. The index of crystallinity of starch of jackfruit seed, 54.0%, is higher than that of starch of jambu fruit seed, 38.1%. Starch of jackfruit seed has higher crystalline properties compared to starch of jambu seed.
Kajian Serapan N, P dan Hasil Umbi Kentang (Solanum tuberosum L.) pada Berbagai Takaran Phonska Alam di Lahan Kering Sembalun Lombok Timur Permana, Wahyu Enggal; Sukartono, Sukartono; Kusumo, Bambang Hari; Kusnarta, IGM; Bakti, Lalu Arifin Aria
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 3 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i3.837

Abstract

Potatoes (Solanum tuberosum L.) are one of the horticultural commodities that have an important role as a food source. The purpose of this study is to determine the nutrient absorption of Nitrogen, Phosphorus and potato tuber products at various doses of natural phonska in the dry land of Sembalun East Lombok. The method used in this study is an experimental method by conducting field experiments that test various doses of natural phonska fertilizer. With fertilizer doses of P0 0 kg/ha, P1 800 kg/ha, P2 1,200 kg/ha, P3 1,600 kg/ha and the use of mulch on potato plants (Solanum tuberosum L.). This research was carried out from March to August 2024, in Sajang Village, Sembalun District on land owned by PT Sembalun Kusuma Emas (SKE). The application of natural phonska and mulch has a real effect on the absorption of nutrients from Nitrogen and Phosphorus. The application of phonska 1,600 kg/ha with mulch application (P3M1) yielded the best absorption value, namely, Nitrogen 1.70 gr/ton and Phosphorus 0.21 gr/ton. The application of natural phonska fertilizer and mulch has a real effect on the number of leaves of potato plants, especially at the age of 3 and 7 weeks after planting (MST). The application of natural phonska fertilizer and the use of mulch have a real effect on the yield of potato plants. The application of phonska 1,600 kg/ha with the application of mulch (P3M).
Perubahan Kerapatan Vegetasi Kota Kupang Berdasarkan Citra Landsat 8 Tahun 2014-2024 Manalu, Tugma Jaya; Haryani, Poppy; Sejati, Martina Ayu
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 3 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i3.843

Abstract

Vegetation change is a key indicator for observing environmental dynamics using GIS and remote sensing approaches. Kupang City as an urban growth center in East Nusa Tenggara, is experiencing development pressures that affect the presence of natural vegetation. This study aims to map vegetation index changes and analyze their dynamics from 2014 to 2024. The method employed NDVI calculation using ArcGIS 10.8 software. The results show that high density vegetation increased from 2,124.9 ha in 2014 to 2,780.46 ha in 2024; medium-density vegetation decreased from 11,133.27 ha to 9,878.49 ha; low-density vegetation increased from 2,269.44 ha to 2,869.65 ha; and non-vegetation areas slightly decreased from 6.75 ha to 5.76 ha. The most significant change occurred in the medium-density class, with a conversion of 1,221.30 ha to low-density vegetation. These findings provide essential insights for vegetation monitoring and sustainable spatial planning in Kupang City.
Karakteristik Morfologi Gabah dan Beras Padi Lokal (Oryza sativa L.) Asal Lombok, Sumbawa, Kalimantan Timur dan Kalimantan Utara Fitriani, Fitriani; Aryana, I Gusti Putu Muliarta; Sudika, I Wayan
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 3 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i3.903

Abstract

This study aims to determine the morphological characteristics of local rice grains and rice from Lombok, Sumbawa, East Kalimantan, and North Kalimantan. This research was conducted in May-October 2024, in lowland rice fields and laboratories. The method used was experimental method with RAK 15 treatments 3 replications. The results showed that there were 6 functional local rice varieties, including 4 local black rice varieties namely G1 (Baas Selem), G3 (Ketan Hitam Tampak Siring), G8 (Padi Hitam Kalimantan Utara), and G15 (Padi Hitam Kaltim) and 2 local red rice varieties namely G4 (Beak Ganggas) and G7 (Padi Merah Kalimantan Utara). Local rice varieties that have hair on the tip of the grain are G4 (Beak Ganggas), G6 (Padi Alas), G11 (Ambuyu Merah), dan G15 (Padi Hitam Kaltim). Local variety G4 (Beak Ganggas) showed the highest 100-grain weight of 3,98 gr, so it can be used as an elder in breeding programs to increase yield.
Identifikasi Hubungan Antara Salinitas dan EC (Electrical Conductivity) Untuk Pengembangan Mitigasi Pengukuran Numerik-in Situ di Area Estuari: Mitigasi Kebencanaan Kualitas Air di Muara Kerandangan Budianto, Arif; Alaydrus, Alfina Taurida; Rahayu, Susi; Andini, Mira; Anggriani, Ni Ketut; Fajarica, Shinta Desiyana
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 3 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i3.946

Abstract

The dynamic nature of estuarine waters necessitates new and accurate methodological approaches for determining salt content or salinity. This can be achieved through direct and real-time measurement of instantaneous and daily EC (Electrical Conductivity) levels in estuaries using EC sensors. On the other hand, similar real-time research has been limited, especially for studies of a continuous real-time nature. Therefore, this study aims to identify the relationship between EC and salinity in an estuary, using the area around the Batulayar estuary, West Lombok Regency, as a case study, employing a direct measurement model continuously for one full day. Measurements were conducted over 5 days during different lunar phases, using direct data acquisition and a numerical linearity approach via data analysis plug-ins. The identification results demonstrate a relationship between EC and salinity. At minimum values, salinity decreases as EC decreases. This reduction follows a quadratic pattern, with an obtained coefficient of determination (R²) of 0.8684 (y = 87397x² – 11173x + 2004.8). This characteristic is also supported by other measured parameters, such as TDS (Total Dissolved Solids), which exhibits a linear relationship with EC. The relationship characteristic between TDS and EC is considerably stronger, as indicated by a linear equation (R² > 0.90).
Pengaruh Konsentrasi Pupuk hayati dan Dosis Pupuk NPK terhadap Pertumbuhan dan Hasil Tanaman Kangkung Darat (Ipomoea reptans) Husnawati, Rina; Nikmatullah, Aluh; Hidayatun Nufus, Novita; Suheri, Herman
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 3 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i3.776

Abstract

This study aims to determine the effect of the concentration of biofertilizer and the dose of NPK fertilizer and their interaction on the growth and yield of land kale plants. This research was conducted from January to February 2024 at Pengenjek Village, Jonggat District, Central Lombok Regency. The design used in this research is Factorial Randomized Group Design (RAK) consisting of 2 treatment factors, namely the concentration of biological fertilizer consisting of 3 levels, namely K0 (control), K1 (5 ml/L) and K2 (10 ml/L). While the second factor is the dose of NPK fertilizer consisting of 4 levels, namely D1 (1 g/plant = control) D2 (1.5 g/plant), D3 (2 g/plant), and D4 (2.5 g/plant) so that 12 treatment combinations are obtained. Each treatment consisted of 3 replicates so there were 36 experimental units. Observation data were analyzed using analysis of variance (analysis of variance) at the 5% level, treatments that were significantly different were further tested using the Honest Differences (BNJ) test at the 5% real level. The results showed that there was a real interaction between the concentration of biofertilizer and the dose of NPK fertilizer in affecting the number of plant leaves at the age of 28, 35 hst and the fresh weight of plant plants at 35 hst. Biofertilizer concentration as a single factor significantly influenced plant height at 28 and 35 hst, height increase rate, number of leaves at 28 and 35 hst, stem diameter at 28 and 35 hst, fresh weight and dry weight of plants. While the dose of NPK fertilizer as a single factor had a significant effect on plant height at 28 and 35 hst, number of leaves at 28 and 35 hst, stem diameter at 28 and 35 hst, fresh weight and dry weight. In this study, the best treatment combinations were 5 ml/L biofertilizer concentration and 1 g/plant NPK fertilizer dose and 10 ml/L biofertilizer concentration and 1 g/plant NPK fertilizer dose. while the best biofertilizer concentration treatments were 5ml/L and 10 ml/L and the best NPK 1 g/plant fertilizer dose treatment on the growth and yield of land kaleplants.
Tocotrienol Berbasis Nabati dalam Akuakultur: Solusi Inovatif untuk Produktivitas, Kesehatan Ikan, dan Keberlanjutan Diamahesa, Wastu Ayu; Azhar, Fariq
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 3 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i3.864

Abstract

Aquaculture plays a pivotal role in global food security but faces challenges such as diseases, oxidative stress, and reliance on unsustainable feed ingredients. Tocotrienol, a plant-based vitamin E isomer, offers an innovative solution with superior antioxidant, anti-inflammatory, and immunomodulatory properties compared to α-tocopherol. This review examines the utilization of tocotrienol from natural sources like red palm oil (Elaeis guineensis) and annatto seeds (Bixa orellana)—containing up to 4,135 mg/L δ-tocotrienol—to enhance aquaculture productivity. Empirical studies demonstrate that tocotrienol supplementation in feed improves Nile tilapia (Oreochromis niloticus) growth and feed efficiency. Its mechanisms involve NF-κB pathway inhibition, Nrf2-ARE activation, and pparγ gene regulation for lipid metabolism. However, challenges such as thermal degradation during feed extrusion and species-specific responses require formulation strategies like nanoencapsulation or industrial byproducts (PFAD). Through integrated approaches, tocotrienol holds potential as a strategic feed additive to advance sustainable aquaculture by enhancing fish health, product quality, and economic efficiency.
Karakteristik Kehilangan Energi dan Potensi Tekanan pada Jaringan Irigasi Perforasi Negara, I Dewa Gede Jaya; Saadi, Yusron; Supriyadi, Anid; Saidah, Humairo; Kusuma, Lalu Dea Maulana Diendy
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 3 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i3.884

Abstract

The magnitude of energy loss in a piping network significantly affects the flow rate that the network can produce. Furthermore, it is important to understand the effect of changes in energy loss and pressure due to changes in the head of the water source. This allows the characteristics of these changes and their impact on the resulting flow rate and discharge to be used as important information in irrigation network design. This test aims to determine the characteristics of the secondary energy loss and residual pressure generated by a perforated irrigation network that uses three secondary network pipes as perforations. The irrigation test was conducted at four head variations: 3.5 m, 3.6 m, 3.7 m, and 3.8 m. The energy loss analysis used the Bernoulli equation, and major and minor energy losses were analyzed at each head variation, including the amount of available water pressure utilized to flow water through the perforated pipe holes. The analysis results showed that a 1 m increase in primary pipe length resulted in an increase in network energy loss of 0.02 m, and each 0.1 m increase in head from 3.5 m resulted in an increase in total energy loss of 0.01 m. At L1  a head of 3.5 m, the pressure is 2.12 m, and at a head of 3.8 m, the pressure is 2.36 m. At L2, the pressure head ranges from 1.97 m to 2.21 m, while at L3, the pressure head ranges from 1.84 m to 2.07 m. Therefore, every 0.1 m increase in head increases the pressure head by 0.08 m in the perforated irrigation network.
Kinerja Beton Polimer dengan Agregat Kasar Daur Ulang Metode Termal-Mekanik-Kimia Kencanawati, Ni Nyoman; Ngudiyono, Ngudiyono; Biomantara, I Nyoman Hari; Mahmud, Fathmah; Merdana, I Nyoman; Hariyadi, Hariyadi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 3 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i3.906

Abstract

The use of natural coarse aggregate in large-scale concrete production can be avoided using recycled coarse aggregate as a substitute for natural aggregate. However, using recycled coarse aggregate can generally affect the quality of concrete. The excessive interfacial transition zone (ITZ) is formed due to the old mortar that is still attached, which is the weakest contact zone in recycled aggregate concrete. The addition of polymers such as Styrene Butadiene Rubber (SBR) to the recycled aggregate concrete mixture is expected to increase the strength in this area. The addition of SBR content of 0%, 2.5%, 5%, and 10% to the weight of the mixture water was carried out to review the performance of concrete in terms of its physical properties and mechanical properties. The coarse aggregate used came from recycled coarse aggregate using the Heating-Grinding-Acid Solvent (H-G-A) method. The results of the study show that H-G-A concrete with an additional SBR content of 5% exhibits superior quality compared to normal aggregate concrete. The addition of SBR shows a denser ITS area resulting in the quality of concrete increases.

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