Jurnal Sains Teknologi dan Lingkungan (JSTL)
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Prediksi Kebutuhan Data Mahasiswa Untuk Kuliah Daring Kondisi Covid-19 Di Jurusan Teknik Elektro Universitas Mataram: Prediction of Student Data Needs for Online Lectures Covid-19 Conditions in the Department of Electrical Engineering, University of Mataram
Get PDFIn the covid-19 condition, lectures at the Department of Electrical Engineering, Mataram University changed from a face-to-face process to via the Internet. T here will be a very sharp increase in demand. The use of data initially provided by the University of Mataram using a free hotspot network turned into a burden on lecturers and students. This research was conducted by sampling, general compulsory subjects, compulsory electrical courses, and compulsory expertise subjects. The distribution of variations of students domiciled in the City of Mataram and the other place coverage Lombok Island, within NTB and outside NTB. The results obtained are as follows: students who still survive in Mataram City are 17% (10.5 GB), Lombok Island 48% (8.1 GB), outside Lonbok Island 27% (4.8 GB), and outside NTB 8% (15 GB).
Keyword : covid-19; lectures; onlin
Penilaian Uji Konsistensi Dokumen AMDAL yang disahkan oleh Komisi Penilai AMDAL Provinsi Sumatera Selatan: The Assessment of EIA Document Consistency Aspect Validated by EIA Assessment Commission of South Sumatra Province
Get PDFEnvironmental Impact Assessment (EIA) is one of the instruments to prevent environmental pollution and/or damage (Undang-Undang 32, 2009). Success in preventing environmental pollution is closely related to the quality of the EIA document, especially the quality of the consistency aspects, such as the consistency between the hypothetical significant impact and the initial environmental baseline, the estimated magnitude of the impact, the environmental management and monitoring plan. Therefore, it is very necessary to assess the consistency of the EIA Document in the Province of South Sumatra. This research aims to assess the consistency test of the EIA Document approved by the EIA Assessment Commission of South Sumatra Province. This study used descriptive qualitative method. The research sample was taken using a total sampling technique, all EIA Documents that have been assessed by the EIA Assessment Commission of South Sumatra Province between 2018-2020 and already have an Environmental Feasibility Decree totaling 12 (twelve) documents are used as research samples. The results showed that 5 (five) documents (42%) had very good consistency,              6 (six) documents (50%) had good consistency and 1 (one) document (8%) ) had a bad consistency
Penerapan Ragam Pola Agroforestri Terhadap Pendapatan dan Cadangan Karbon di Kawasan Hutan Sesaot Lombok Barat
Get PDFThe Sesaot forest area has been managed by the community through the Social Forestry scheme with an agroforestry system. The objectives of the study were to identify the diversity of agroforestry patterns, analyze incomes on various agroforestry patterns, analyze the amount of carbon stock and analyze the most optimal agroforestry patterns. The method used is descriptive through a series of observations, interviews and Focus Group Discussions, to 42 respondents and measurement of carbon stocks in 18 farmer locations. Analysis of agroforestry patterns was carried out by making clusters based on plant dominance, analyzing the amount of carbon using allometric equations and analyzing the optimal value of agroforestry patterns using scoring. Based on the results of the study, it can be concluded that: there are four agroforestry patterns in the Sesaot Forest Area, namely, candlenut dominant agroforestry, mahogany dominant agroforestry, mixed agroforestry and simple agroforestry. The largest income was obtained in the mixed agroforestry pattern and the smallest was in the mahogany dominant. Meanwhile, the largest amount of carb on stock was found in the mahogany dominant and the smallest was in the simple agroforestry. The results of the scoring analysis show that mixed agroforestry practices are in the most optimal category compared to other agroforestry patterns
Serbuk Biji Asam Jawa (Tamarin Dusindica L) untuk Pengelolaan Limbah Industri Cair Tempe (Studi Kasus Mataram): Tamarind Seed Powder (Tamarindusindica, L) to Treatment the Liquid Waste Industrial of Tempe (Mataram case study)
Get PDFMost of the tempe industry have not been equipped with a waste water treatment unit. It is usually a water soaked soybeans and soybean excess water is still discharged directly in the into the environment. Liquid waste industrial of tempeh contain high organic materials. One of the process for wastewater treatment is coagulation with the addition of a positively charged polyelectrolyte in tempeh wastewater as negatively charged. One of plants in Indonesia that can be used as an alternative coagulant is tamarind seeds (Tamarindus indica, L).it can be used for wastewater treatment is more economical. The aims of this experiment is to determine the optimum stirring time, optimum pH of the waste and optimum coagulant dosage for treatment of the tempeh wastewater with coagulant tamarind seed powder. The experiment studied were stirring time, the pH of thetempeh wastewater and coagulant dosage to the percentage decrease in turbidity and COD (Chemical Oxygen Demand). The variables in the experiment were stirring time (10,15, 20, 25 and 30 minutes), the pH of the waste (3; 3.5; 4; 4 and 5) and the dosage of tamarind seed powder (100, 300, 500, 700, and 900 mg / L). COD testing methods is closed reflux method by spectrophotometry and turbidity testing using Turbidimeter. The results showed that the with coagulant tamarind seed powder effectively lowered cod levels and the dryness of tempeh liquid industrial waste. The optimum pH obtained is pH 4, optimum stirring time is 25 minutes and the increase in optimum coagulant dose is 500 mg with a percentage decrease in COD levels and noise by 90.57% and 78.94%.
 Key words: liquid waste; sour power; turbidity; CO
Kondisi Terkini Presentase Tutupan Terumbu Pada Masa Pandemi Covid-19 di Gili Air, Taman Wisata Perairan Gili Matra, Nusa Tenggara Barat: The Current Condition of the Coral Reef Cover Percentage during the Covid-19 Pandemic in Gili Air, Gili Matra Marine Protected Area, West Nusa Tenggara
Get PDFGili Matra Aquatic Tourism Park has two conservation targets, namely biological targets and social, cultural and economic targets. Coral reef ecosystems, apart from being a conservation target, are also an attraction for tourists to visit. This research was conducted to determine the condition of the coral reef ecosystem to be used as the basis for the management of conservation areas. The research was conducted by collecting coral reef data either through surveys or secondary data from the results of previous studies. Coral reef survey using the standard Line Intercept Transect method. The survey results show that the condition of coral reefs in the utilization zone is better than the core zone. Live coral cover in the utilization zone reached 71% so it was categorized as good, while in the core zone it only reached 8% so it was categorized as bad. Coral reefs in the core zone are unable to recover even though the number of tourists has decreased during the Covid-19 pandemic. Therefore, the location of the core zone on Gili Air needs to be evaluated further so that the effectiveness of Gili Matra TWP management can be improved.
 Key words: coral reefs; Gili Matra; Conservatio
Perlakuan Pupuk Kandang Untuk Mengurangi Dosis Pupuk Kimia Pada Budidaya Tanaman Cabai (Capsicum annuum L.): Manure Treatment to Reduce Chemical Fertlizer Dose in Chili (Capsicum annuum L.) Culture
Get PDFThe use of high doses of chemical fertilizers in the production of chili (Capsicum annuum L.) has an adverse impact on the environment, especially in dryland. This study aimed to examine the role of cow manure (PKS), goat manure (PKK), chicken manure (PKA), or a combination of two manures in reducing 25% of the requirement for chemical fertilizer on chili plants. One experiment was carried out in the dryland of Gumantar Village, North Lombok Regency, from May to October 2021. Phonska NPK (15-15-15) chemical fertilizer (PK) at a 1,200 kg/ha dose was used as a control. The treatments tested were 75% PK+PKS, 75% PK+PKK, 75% PK+PKA, 75% PK+PKS+PKK, 75% PK+PKS+PKA and 75% PK+PKK+PKA. The dose of manure used in each treatment was 20 tons/ha. All treatments were repeated three times and arranged in a randomized block design. The results showed that the treatment of manure, especially goat manure and chicken manure, increased the available phosphate (P) in the soil. The growth and yield of chili plants were not significantly different in all treatments, which means that manure could replace the role of 25% of the chemical fertilizer used. These results indicate that manure in the long term can reduce the need for chemical fertilizers to produce chili in dryland.
Key words: chili; dryland; manure; chemical fertilizer; nutritio
Penyisihan Polutan pada Palm Oil Mill Effluent (POME) Menggunakan Konsorsium Mikroalga-Bakteri dengan Sistem High Rate Algae Reactor (HRAR)
Get PDFPalm oil mills in addition to producing crude palm oil also produce by-products in the form of Palm Oil Mill Effluent (POME). POME contains high amounts of organic ingredients and pollutants. One method that can be applied to treat POME is the High Rate Algae Reactor (HRAR) System. The HRAR system uses microalgae-bacterial consortium that has better performance in removing pollutants in POME and increasing the growth of microorganisms. This research aim by determining the effect of microalgae suspension concentration in the HRAR system towards the removal efficiency of Chemical Oxygen Demand (COD) and total nitrogen. The research was conducted in batch in the HRAR system that equipped with a paddle wheel, by variations of microalgae suspension concentration as 0; 10; 15; 20; and 25 (% v/v). The research was carried out for 7 days and used the sun as a source of light. Based on the research results, 25% of microalgae suspension concentration has the highest microalgae cell density, was 6,34 x 106 cells/mL and showed the best removal efficiency of COD and total nitrogen, were 78.79% and 80.37%. Â
Analisis Potensi dan Pemanfaatan Sumberdaya Ikan (SDI) Yang Didaratkan di Pelabuhan Perikanan Teluk Awang
Get PDFThe Teluk Awang Fishery Port (PP) is located in Mertak Village, Central Lombok Regency, which has the potential to develop as a center of economic growth with a fishery business base. It has a good geographical location because it is protected from waves coming from the Indian Ocean. Currently the Central Government, West Nusa Tenggara Provincial Government and Central Lombok Regency Government are jointly developing Awang Bay as a fishery business center by building a fishing port that can accommodate fishing vessels operating in WPPNRI 573 and 713. This study will look at fish resources ( SDI) in PP Teluk Awang uses the Participatory Action Research (PAR) method which actively involves all relevant parties. The results of the research show that the SDI that was landed in PP Teluk Awang during 2018-2020 as much as 3,559,483 kg was still dominated by pelagic and demersal fish, such as Cakalang fish (62.67%), Layang (10.77%), Tongkol ( 8.29%), Lemadang (6.34%), Tuna (5.42%), Baby Tuna (3.88%), Marlin (1.48%) and other fish (1.15%). The recorded fleet of ships is 27 units with a size of 8-25 Gross Tonnage (GT). The results of this study are expected to be a recommendation related to policies in managing the potential of SDI landed in PP Teluk Awang with the concept of sustainable fisheries
Keanekaragaman dan Pola Sebaran Moluska (Gastropoda dan Bivalvia) yang Berasosiasi Pada Ekosistem Mangrove di Pesisir Selatan Lombok Timur
Get PDFMangrove ecosystems have an important role in coastal areas. Mangroves have a function as a shelter, foraging for food, and breeding various aquatic biota. Damage to mangrove forests can cause the service of mangrove ecosystems to decrease, especially for mollusk life. Mollusks are one of the associated biotas of mangroves whose life is influenced by mangrove forests. Therefore, the purpose of this study was to determine the diversity of mollusks and the relationship between mollusk density and mangrove density in the mangrove ecosystem of the southern coast of East Lombok. A sampling of mollusks used the quadrate sampling method by purposive sampling by taking into account the mangrove species contained in the observation plot. The collected data were analyzed by diversity index, distribution pattern, association, and Pearson correlation coefficient. Then a simple linear regression analysis was performed with the independent variable (x) mangrove density and the dependent variable (y) mollusk density. The results of this study were the discovery of 22 species of mollusks consisting of 17 species of gastropods and five species of bivalves. The density of mollusks in the mangrove ecosystem of the southern coast of East Lombok is 44.50±2.63 ind./m2. The diversity index at the study site was classified as moderate, with a value ranging from 1.99 to 2.46. The distribution pattern of mollusks at the research site is clustered with an Id value > 1. There are eight mollusk species associated with three mangrove species from 22 mollusk species found. The linear regression equation y = 0.084x – 0.2963 with a Pearson correlation coefficient (r) 0.95 describes a strong relationship between the independent variable (x) mangrove density and the dependent variable (y) mollusk density. This study concludes that there is a significant relationship between mangrove density and mollusk density as indicated by F-hit(41.01) > F-table (7.70) and P-value (0.003) < (0.05). Â
Aglomerasi Industri Kelautan melalui Penataan Zonasi Kawasan Strategis Nasional Bima dan Sumbawa Andalan
Get PDFThe Strategic Areas of Teluk Bima and Teluk Saleh on Sumbawa Island have potential natural resources for regional economic development. Through the determination of the Teluk Bima and Teluk Saleh areas as National Strategic Areas, it is expected that economic growth in this region will develop significantly, so that regulations are needed from the aspects of planning, utilization and control of space to support various infrastructure activities and other sector activities in the context of realizing a safe, comfortable space, productive and sustainable. This study aims to analyze the suitability of space as a national strategic area. Data was collected through library research and searching for data and information on institutions related to the FGD approach. Space suitability analysis using Geographic Information System (GIS) approach. The results show that the Teluk Bima Bay and Teluk Saleh area (called Bima and Sumbawa Andalan) is worthy of being a national strategic area, with the leading sectors of tourism, industry and fisheries, so that it is important to prepare the Spatial Planning of the Strategic area.Â