Abstract:Open burning of waste is still one of the problems in waste management because it can produce various air pollutants and has the potential to reduce environmental quality. This study aims to evaluate the ambient air quality…
ity around a simple waste incinerator using a Smokeless Barrel Incinerator (SBI) and analyze the concentrations of sulfur dioxide (SO₂), carbon monoxide (CO), and ozone (O₃) against ambient air quality standards. The study uses a quantitative approach with an experimental method. Sampling was carried out in the parking area of Nahdlatul Ulama University of West Sumatra at a distance of 20 meters from the source of combustion with a downwind position and the height of the tool was about 1.5–2 meters from the ground level. Sampling was carried out for 1 hour. SO₂ and O₃ parameters were analyzed using an impinger system and spectrophotometry methods, while CO was measured using gas analysis instruments according to laboratory methods. The test results showed a concentration of SO₂ of 4.02 μg/m³, CO of 338 μg/m³, and O₃ of 0.067 μg/m³. Based on the reference values used in the study, the three parameters were below the ambient air quality standard. The results showed that under the test conditions, the use of SBI did not cause the concentration of SO₂, CO, and O₃ at the sampling point to exceed the quality standard values. The primary and secondary ventilation systems in SBI have the potential to help improve oxygen supply and combustion processes. However, the results of the study cannot be used to state that SBI is pollutant-free because the parameters of particulate matter, NOₓ, VOCs, PAHs, dioxins-furans, and heavy metals have not been analyzed and direct comparative testing with open combustion has not been carried out.
Abstract:Abstract: Hydrometeorological disasters frequently damage electrical and telecommunication infrastructures, disrupting the coordination of Search and Rescue (SAR) operations. Conventional communication devices such as Handy…
ndy Talkies (HT) are limited to voice communication and do not support real-time multimedia data transmission. This study aims to develop a portable emergency communication system based on Low Earth Orbit (LEO) Starlink satellite internet integrated with a solar power system as an independent energy source to support communication during post-disaster emergency response. The research employs the Research and Development (R&D) approach using the Design Science Research (DSR) paradigm, consisting of requirement identification, system architecture design, prototype development, laboratory testing, and field simulation. System performance is evaluated based on Quality of Service (QoS) parameters, including latency, throughput, connection stability, power consumption, operating duration, and system portability. The prototype is designed to weigh less than 15 kg, require less than 10 minutes for deployment, and operate independently for 6–8 hours using a 300–500 W solar power system. The proposed system is expected to provide reliable internet connectivity for real-time transmission of audio, video, images, and GPS coordinates, thereby improving the effectiveness of SAR coordination in disaster-affected areas.
Keywords: Emergency Communication; Starlink; Solar power; Search and Rescue; Satellite Network.
Abstrak: Bencana hidrometeorologi sering menyebabkan kerusakan infrastruktur listrik dan telekomunikasi sehingga menghambat koordinasi operasi Search and Rescue (SAR). Keterbatasan perangkat komunikasi konvensional seperti Handy Talky (HT) mengakibatkan pertukaran informasi hanya terbatas pada komunikasi suara tanpa dukungan data multimedia secara real-time. Penelitian ini bertujuan mengembangkan sistem komunikasi darurat portabel berbasis internet satelit Low Earth Orbit (LEO) Starlink yang terintegrasi dengan panel surya sebagai sumber energi mandiri untuk mendukung komunikasi pada kondisi pascabencana. Metode penelitian menggunakan pendekatan Research and Development (R&D) dengan paradigma Design Science Research (DSR) yang meliputi identifikasi kebutuhan, perancangan arsitektur sistem, pengembangan prototipe, pengujian laboratorium, dan simulasi lapangan. Evaluasi dilakukan terhadap parameter Quality of Service (QoS) berupa latensi, throughput, stabilitas koneksi, konsumsi daya, durasi operasi, serta portabilitas sistem. Prototipe dirancang berbobot kurang dari 15 kg, waktu pemasangan kurang dari 10 menit, dan mampu beroperasi mandiri selama 6–8 jam menggunakan panel surya berkapasitas 300–500 W. Sistem yang dikembangkan diharapkan mampu menyediakan konektivitas internet yang stabil untuk mendukung komunikasi audio, video, citra, dan koordinat GPS secara real-time, sehingga meningkatkan efektivitas koordinasi operasi SAR di wilayah terdampak bencana..
Kata kunci: Komunikasi darurat; Starlink; Panel Surya; Search and Rescue; Jaringan Satelit.
Abstract:Abstract: Advances in digital information systems have encouraged companies to utilize mobile applications as a customer service medium. Fore Coffee is a digital-based coffee company that uses a mobile application to support…
port the ordering process and customer service. The level of application user satisfaction can be determined through ratings given on the Google Play Store. These ratings are dynamic, so an analytical method is needed to determine the direction of changes. This study aims to analyze the trend of user satisfaction of the Fore Coffee application based on rating data on the Google Play Store using the Trend Moment method. Data was obtained through web scraping using Python on Google Collaboratory with a data collection period of 2019–2025. The collected data was then processed using the Trend Moment method to identify trends in changes in user satisfaction levels over time. The results show that the average user rating of the Fore Coffee application during the 2019–2025 period ranged from 3.92 to 4.36. The highest value occurred in 2021 at 4.36, while the lowest value occurred in 2023 at 3.92. The results of the Trend Moment calculation produce a trend equation Y = 4.23 − 0.03X. The coefficient of −0.03 indicates a very small tendency for user satisfaction to decrease so that in general the level of user satisfaction remains stable and receives a positive response.
Keywords: Fore Coffee, Google Play Store, User Rating, User Satisfaction, Trend Moment.
Abstrak: Kemajuan sistem informasi digital telah mendorong perusahaan memanfaatkan aplikasi seluler sebagai media layanan pelanggan. Fore Coffee merupakan salah satu perusahaan kopi berbasis digital yang menggunakan aplikasi seluler untuk mendukung proses pemesanan dan pelayanan pelanggan. Tingkat kepuasan pengguna aplikasi dapat diketahui melalui rating yang diberikan pada Google Play Store. Rating tersebut bersifat dinamis sehingga diperlukan metode analisis untuk mengetahui arah perubahannya. Penelitian ini bertujuan menganalisis tren kepuasan pengguna aplikasi Fore Coffee berdasarkan data rating pada Google Play Store menggunakan metode Trend Moment. Data diperoleh melalui proses web scraping menggunakan Python pada Google Colaboratory dengan periode pengambilan data tahun 2019–2025. Data yang terkumpul kemudian diolah menggunakan metode Trend Moment untuk mengidentifikasi kecenderungan perubahan tingkat kepuasan pengguna dari waktu ke waktu. Hasil penelitian menunjukkan bahwa rata-rata rating pengguna aplikasi Fore Coffee selama periode 2019–2025 berada pada rentang 3,92 hingga 4,36. Nilai tertinggi terjadi pada tahun 2021 sebesar 4,36, sedangkan nilai terendah terjadi pada tahun 2023 sebesar 3,92. Hasil perhitungan Trend Moment menghasilkan persamaan tren Y = 4,23 − 0,03X. Koefisien −0,03 menunjukkan adanya kecenderungan penurunan kepuasan pengguna yang sangat kecil sehingga secara umum tingkat kepuasan pengguna tetap stabil dan memperoleh respons positif..
Kata kunci: Fore Coffee, Google Play Store, Rating Pengguna, Kepuasan Pengguna, Trend Moment.
Abstract:Abstract: Chronic diseases such as diabetes, hypertension, and heart disease are major causes of morbidity and mortality in various countries, including Indonesia. Early detection of chronic disease risk is a crucial step…
p in more effective prevention and treatment. One important source of information for identifying these risks is laboratory data, particularly patient blood data, which includes parameters such as glucose levels, cholesterol, blood pressure, hemoglobin, and other indicators. The objective of this study was to design and develop a patient blood data clustering application to identify chronic disease risk using the K-Menas method and the Elbow method using a web programming language. The data used in this study consisted of a sample of 140 individuals. Of the total sample, 140 patients were successfully grouped into four optimal clusters (K = 4). This data partitioning process resulted in a varied population distribution within each cluster, reflecting the heterogeneity of clinical and demographic characteristics among the study subjects. Based on the analysis of 140 patients, the population was dominated by the Critical/Chronic group (Cluster 4) at 45.7% (64 patients), followed by the Healthy/Normal Group (Cluster 1) at 30% (42 patients), and the Low/Early Risk (Cluster 2) and High Risk (Cluster 3) groups, each with an equal minority proportion of 12.1% (17 patients).
Keywords: Elbow Optimization, K-Menas Method, Clustering, Patient Blood Data, Chronic Disease Risk Identification
Abstrak: Penyakit kronis seperti diabetes, hipertensi, dan penyakit jantung menjadi penyebab utama morbiditas dan mortalitas di berbagai negara, termasuk Indonesia. Deteksi dini terhadap risiko penyakit kronis merupakan langkah penting dalam upaya pencegahan dan penanganan yang lebih efektif. Salah satu sumber informasi penting untuk mengidentifikasi risiko tersebut adalah data laboratorium, khususnya data darah pasien, yang mencakup parameter-parameter seperti kadar glukosa, kolesterol, tekanan darah, hemoglobin, serta indikator lainnya. Tujuan dalam penelitian ini ialah Untuk merancang dan membuat aplikasi clustering data darah pasien untuk identifikasi resiko penyakit kronis menggunakan Metode K-Menas dan metode elbow dengan bahasa pemrograman web. Data yang digunakan dalam penelitian ini berupa sample sebanyak 140 orang. Dari total sampel penelitian sebanyak 140 pasien berhasil dikelompokkan ke dalam 4 klaster optimal (K = 4). Proses partisi data ini menghasilkan sebaran populasi yang bervariasi di setiap klasternya, mencerminkan adanya heterogenitas karakteristik klinis atau demografis di antara subjek penelitian. Berdasarkan hasil analisis terhadap 140 pasien, populasi didominasi oleh kelompok Kritis/Kronis (Klaster 4) sebesar 45,7% (64 pasien), diikuti kelompok Kelompok Sehat/Normal (Klaster 1) sebesar 30% (42 pasien), serta kelompok Risiko Rendah/Awal (Klaster 2) dan Risiko Tinggi (Klaster 3) yang memiliki proporsi minoritas setara masing-masing sebesar 12,1% (17 pasien).
Kata Kunci: Optimasi Elbow, Metode K-Menas, Clustering, Data Darah Pasien, Identifikasi Resiko Penyakit Kronis
Abstract:Abstract: This study aims to synthesize and characterize barium sulfate (BaSO?) as an ionic compound using a precipitation method, as well as to analyze its physical properties and solubility based on laboratory experimental…
ntal results. The synthesis was carried out by reacting barium chloride (BaCl?) and sodium sulfate (Na?SO?) solutions in an aqueous medium, resulting in the formation of a white BaSO? precipitate. The precipitate was then separated through filtration, washed with distilled water, and dried to obtain a stable solid product. Characterization was conducted through physical and solubility tests. The results showed that the obtained BaSO? was in the form of a fine white powder. In the solubility test, the compound was found to be insoluble in water, indicating that BaSO? has very low solubility. Based on stoichiometric calculations, the theoretical mass was 2.33 grams, while the experimental mass was 0.55 grams, resulting in a percentage yield of 23.6%. The relatively low yield indicates that the synthesis process was not fully optimal. Theoretically, the formation of BaSO? precipitate is influenced by its very low solubility product constant (Ksp), causing Ba²? and SO?²? ions in solution to form a solid phase. The results of this study are consistent with theoretical principles in terms of precipitate formation, physical properties, and solubility, although differences were observed in the quantitative results.
Keywords: Baso?, Precipitation, Ionic Compound, Solubility, Yield
Abstrak: Penelitian ini bertujuan untuk mensintesis dan mengkarakterisasi senyawa ion Barium Sulfat (BaSO?) melalui metode pengendapan serta menganalisis sifat fisik dan kelarutannya berdasarkan hasil eksperimen laboratorium. Sintesis dilakukan dengan mereaksikan larutan Barium Klorida (BaCl?) dan natrium sulfat (Na?SO?) dalam medium berair sehingga terbentuk endapan putih BaSO?. Endapan yang dihasilkan kemudian dipisahkan melalui proses filtrasi, dicuci menggunakan Aquades, dan dikeringkan untuk memperoleh padatan yang stabil. Karakterisasi dilakukan melalui uji fisik dan uji kelarutan. Hasil pengamatan menunjukkan bahwa BaSO? yang diperoleh berbentuk serbuk halus berwarna putih. Pada uji kelarutan, senyawa ini tidak larut dalam air, yang menunjukkan bahwa BaSO? memiliki kelarutan yang sangat rendah. Berdasarkan perhitungan stoikiometri, diperoleh massa teoritis sebesar 2,33 gram, sedangkan massa hasil eksperimen sebesar 0,55 gram, sehingga diperoleh persen rendemen sebesar 23,6%. Nilai rendemen yang relatif rendah menunjukkan bahwa proses sintesis belum berlangsung secara optimal. Secara teoritis, pembentukan endapan BaSO? dipengaruhi oleh nilai hasil kali kelarutan (Ksp) yang sangat kecil, sehingga ion Ba²? dan SO?²? dalam larutan cenderung membentuk fase padat. Hasil penelitian ini menunjukkan kesesuaian dengan teori dari segi pembentukan endapan, sifat fisik, dan kelarutan, meskipun terdapat perbedaan pada hasil kuantitatif yang diperoleh.
Kata kunci: BaSO?, Pengendapan, Senyawa Ion, Kelarutan, Rendemen
Abstract:Abstract: This study is based on the importance of understanding precipitation reactions, solubility, and the characteristics of ionic compounds through laboratory experiments. The aim of this research is to synthesize silver…
ilver chloride (AgCl) via a precipitation reaction, observe the physical characteristics of the resulting precipitate, and examine its solubility in water. The method applied was an experimental approach by mixing 0.01 M AgNO? and NaCl solutions, followed by filtration, drying, and weighing to obtain the experimental mass as well as to calculate the theoretical mass and percentage error. The results indicated the formation of a white AgCl precipitate with a mass of 0.26 grams. The precipitate showed a slight purplish discoloration after exposure to light, indicating its photosensitive nature. The solubility test revealed that AgCl is insoluble in water. The percentage error was found to be 27.8%, which may be attributed to incomplete drying, the presence of impurities, and inaccuracies during filtration and weighing processes. Future studies are recommended to ensure complete drying until constant mass is achieved, reduce contamination, and improve precision in each experimental step to obtain more accurate results.
Keywords: Precipitation, Silver Chloride (AgCl), Solubility, Gravimetry, Photosensitive
Abstrak: Penelitian ini dilatarbelakangi oleh pentingnya pemahaman konsep reaksi presipitasi, kelarutan, dan karakteristik senyawa ionik melalui kegiatan eksperimen laboratorium. Tujuan penelitian ini adalah untuk mensintesis senyawa perak klorida (AgCl) melalui reaksi presipitasi, mengkarakterisasi sifat fisik yang terbentuk, serta menganalisis sifat kelarutannya dalam air. Metode yang digunakan adalah metode eksperimen dengan mencampurkan larutan AgNO? dan NaCl masing-masing 0,01 M, dilanjutkan dengan proses filtrasi, pengeringan, dan penimbangan untuk menentukan massa hasil serta menghitung massa teoritis dan persen kesalahan. Hasil penelitian menunjukkan terbentuknya endapan putih AgCl dengan massa sebesar 0,26 gram yang kemudian mengalami perubahan warna menjadi keunguan akibat pengaruh cahaya (sifat fotosensitif). Uji kelarutan menunjukkan bahwa AgCl tidak larut dalam air. Persen kesalahan yang diperoleh sebesar 27,8% yang disebabkan oleh faktor pengeringan yang belum optimal, adanya pengotor, serta kesalahan dalam proses penyaringan dan penimbangan. Disarankan bagi peneliti selanjutnya untuk meningkatkan ketelitian dalam proses pengeringan hingga mencapai massa konstan, meminimalkan kontaminasi, serta menggunakan teknik pemurnian yang lebih baik agar diperoleh hasil yang lebih akurat.
Kata kunci: Presipitasi, Perak Klorida (AgCl), Kelarutan, Gravimetri, Fotosensitif
Abstract:Abstract: Limited access to laboratory facilities in vocational education, particularly in the field of mechanical engineering, often becomes a major obstacle in providing safe and industry-relevant practical experiences.…
. Vocational high school (SMK) teachers in Bontang face challenges in delivering effective and efficient practice-based learning. This study aims to develop a Mixed Reality (MR) Laboratory as an innovative solution for simulating mechanical engineering practices. The MR Mixed Lab is designed to provide interactive learning experiences through mixed reality technology, enabling teachers to guide students in understanding machine assembly and disassembly concepts without the risk of equipment damage or injury. In addition, MR implementation can reduce operational practice costs and increase the frequency of training within a more realistic learning environment. The research method employed is Research and Development (R&D) with the ADDIE model, which consists of the stages of Analysis, Design, Development, Implementation, and Evaluation. The development process involves user needs analysis, system design, creation of interactive 3D models, and effectiveness testing involving vocational school teachers. Data are collected through observation, questionnaires, and interviews to evaluate usability, learning effectiveness, and user engagement. The expected outcome is an MR Lab prototype that is relevant, feasible, and beneficial for vocational education.
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Keywords: Mixed Reality (MR), Practice Simulation, Mechanical Engineering, Digital Laboratory, Teacher
Abstrak: Keterbatasan akses laboratorium dalam pendidikan vokasi, khususnya pada bidang teknik mesin, sering menjadi kendala utama dalam memberikan pengalaman praktik yang aman dan relevan dengan kondisi industri. Guru SMK di Bontang menghadapi tantangan dalam menyediakan sarana pembelajaran praktik yang efektif dan efisien. Penelitian ini bertujuan untuk mengembangkan Laboratorium Mixed Reality (MR) sebagai solusi inovatif untuk simulasi praktik teknik mesin. MR Mixed Lab dirancang untuk memberikan pengalaman pembelajaran interaktif melalui teknologi realitas campuran, memungkinkan guru membimbing siswa dalam memahami konsep perakitan dan pembongkaran mesin tanpa risiko kerusakan peralatan atau cedera. Selain itu, penggunaan MR dapat menekan biaya operasional praktik serta meningkatkan frekuensi latihan dalam lingkungan belajar yang lebih realistis. Metode penelitian yang digunakan adalah Research and Development (R&D) dengan model ADDIE yang mencakup tahapan Analysis, Design, Development, Implementation, dan Evaluation. Proses pengembangan melibatkan analisis kebutuhan pengguna, desain sistem, pembuatan model 3D interaktif, serta pengujian efektivitas dengan melibatkan guru SMK. Data dikumpulkan melalui observasi, kuesioner, dan wawancara untuk mengevaluasi kemudahan penggunaan, efektivitas pembelajaran, serta tingkat keterlibatan pengguna. Hasil penelitian diharapkan dapat menghadirkan prototipe MR Lab yang relevan, layak, dan bermanfaat bagi pendidikan vokasi
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Kata kunci: Mixed Reality (MR), Simulasi Praktik, Teknik Mesin, Laboratorium Digital, Guru
Abstract:Abstract: This study aims to analyze the impact of river pollution on the performance of freshwater aquaculture using five major rivers in Padang City: Batang Arau, Batang Kuranji, Batang Air Dingin, Batang Kandis, and Batang…
atang Anai. A quantitative approach was applied through field surveys and laboratory analyses at three stations of each river to measure physical, chemical, and biological water parameters, as well as aquaculture performance indicators including survival rate, specific growth rate, feed conversion ratio, and harvest biomass. The results show that most water quality parameters exceeded the Class II standards of Government Regulation No. 22/2021, particularly turbidity, TSS, ammonia, BOD, COD, and total coliform. Regression analysis indicates that chemical parameters have the strongest influence on aquaculture performance, followed by physical parameters, while biological parameters are near-significant, and anthropogenic pollution exerts a significant negative effect. Batang Air Dingin showed the best water quality and aquaculture performance, whereas Batang Kandis exhibited the highest pollution level and lowest production outcomes. The study concludes that river pollution significantly reduces freshwater aquaculture productivity and highlights the need for sustainable water quality management.
Keywords: Aquaculture; Performance; Pollution; River; Water Quality.
Abstrak: Penelitian ini bertujuan menganalisis pengaruh pencemaran air sungai terhadap keberhasilan budidaya ikan air tawar pada lima sungai utama di Kota Padang, yaitu Batang Arau, Batang Kuranji, Batang Air Dingin, Batang Kandis, dan Batang Anai. Metode penelitian menggunakan pendekatan kuantitatif melalui survei lapangan dan analisis laboratorium pada tiga stasiun setiap sungai, meliputi parameter fisika, kimia, dan biologi, serta indikator performa budidaya yang terdiri dari survival rate, laju pertumbuhan harian, feed conversion ratio, dan biomassa panen. Hasil penelitian menunjukkan bahwa sebagian besar parameter kualitas air telah melampaui baku mutu PP 22/2021 Kelas II, terutama kekeruhan, TSS, amonia, BOD, COD, dan total coliform. Analisis regresi mengindikasikan bahwa parameter kimia merupakan faktor paling dominan memengaruhi keberhasilan budidaya, diikuti parameter fisika, sementara parameter biologi mendekati signifikan, dan pencemaran antropogenik terbukti berpengaruh negatif terhadap performa budidaya. Sungai Batang Air Dingin memiliki kualitas air terbaik dan hasil budidaya tertinggi, sedangkan Batang Kandis menunjukkan tingkat pencemaran tertinggi dan performa budidaya terendah. Penelitian ini menyimpulkan bahwa pencemaran sungai berperan nyata dalam menurunkan produktivitas budidaya ikan dan perlu dilakukan pengelolaan kualitas air secara berkelanjutan.
Kata Kunci: Budidaya Ikan; Kualitas Air; Pencemaran; Performa Budidaya; Sungai.
Abstract:Abstract: This study aims to evaluate the effectiveness of utilizing biomass and industrial waste materials as environmentally friendly adsorbents in reducing the levels of heavy metal ions Cd(II) and Zn(II) in industrial…
l wastewater. The research sample was a synthetic waste solution with a metal concentration of 10–100 ppm as a model population. The sampling technique used was purposive sampling on four types of adsorbents, namely SCOBY, EDTA-activated teak wood powder, modified fly ash, and iron-magnesium waste. Data were collected through laboratory experiments with metal content measurements using Atomic Absorption Spectroscopy (AAS). Data analysis included Langmuir and Freundlich isotherm methods, as well as pseudo-first and second-order adsorption kinetics models to understand the adsorption mechanism. The results showed that ironmagnesium waste was able to reduce Cd(II) and Zn(II) levels by more than 99%, followed by fly ash and SCOBY biomass with significant efficiency. This study demonstrates the great potential of sustainable adsorbent materials that support the principles of a circular economy and more environmentally friendly waste management solutions. It is recommended to develop industrial scale applications to support the Sustainable Development Goals in the field of providing clean water and proper sanitation.
Keyword: Environmentally Friendly Adsorbent, Biomass, Industrial Waste, Heavy Metal Ions, Cd(II), Zn(II)
Abstrak: Penelitian ini bertujuan untuk mengevaluasi efektivitas pemanfaatan material biomassa dan limbah industri sebagai adsorben ramah lingkungan dalam menurunkan kadar ion logam berat Cd(II) dan Zn(II) dalam limbah cair industri. Sampel penelitian berupa larutan limbah sintetik dengan konsentrasi logam 10–100 ppm sebagai populasi model. Teknik sampling yang digunakan adalah purposive sampling pada empat jenis adsorben, yaitu SCOBY, serbuk kayu jati teraktivasi EDTA, fly ash termodifikasi, dan limbah besi-magnesium. Data dikumpulkan melalui eksperimen laboratorium dengan pengukuran kadar logam menggunakan Atomic Absorption Spectroscopy (AAS). Analisis data meliputi metode isoterm Langmuir dan Freundlich, serta model kinetika adsorpsi pseudo-orde satu dan dua untuk memahami mekanisme penyerapan. Hasil menunjukkan bahwa limbah besi-magnesium mampu menurunkan kadar Cd(II) dan Zn(II) hingga lebih dari 99%, diikuti oleh fly ash dan biomassa SCOBY dengan efisiensi yang signifikan. Penelitian ini menunjukkan potensi besar material adsorben berkelanjutan yang mendukung prinsip ekonomi sirkular dan solusi pengelolaan limbah yang lebih ramah lingkungan. Disarankan pengembangan skala aplikasi industri guna mendukung tujuan Sustainable Development Goals pada bidang penyediaan air bersih dan sanitasi layak.
Kata kunci: Adsorben Ramah Lingkungan, Biomassa, Limbah Industri, Ion Logam Berat, Cd(II), Zn(II)
Abstract:Abstract: This research aims to determine the potential of grape waste (Vitis vinifera L.) in the production of biogas as an environmentally friendly alternative energy source. The method used in this study was a simple…
laboratory experiment by utilizing 500 grams of grape waste and 500 mL of clean water with a ratio of 1:1. The mixture was placed into an aquades bottle functioning as a digester, tightly closed using rubber, and connected to a balloon as a gas collector. The fermentation process was carried out anaerobically for six days at room temperature. Daily observations were made on pH changes, odor, and the expansion of the balloon as indicators of gas production. The results showed that the formation of biogas began on the second day and reached its maximum on the fourth day, as indicated by the fully inflated balloon. On the fifth and sixth days, the gas production began to decrease, showing that the fermentation process was nearing completion. It can be concluded that grape waste can be used as raw material for biogas production using simple tools without the addition of other chemical materials. This process is an example of biotechnology application in daily life that supports environmental sustainability and provides a renewable alternative energy source.
Keyword: Grape Waste, Biogas, Biotechnology, Renewable Energy, Environment
Abstrak: Penelitian ini bertujuan untuk mengetahui potensi limbah buah anggur (Vitis vinifera L.) dalam pembuatan biogas sebagai sumber energi alternatif yang ramah lingkungan. Metode yang digunakan adalah eksperimen laboratorium sederhana dengan memanfaatkan 500 gram limbah buah anggur dan 500 mL air bersih dengan perbandingan 1:1. Campuran tersebut dimasukkan ke dalam botol aquades yang berfungsi sebagai digester, kemudian ditutup rapat menggunakan karet dan dihubungkan dengan balon sebagai penampung gas. Proses fermentasi dilakukan secara anaerob selama enam hari pada suhu ruang. Pengamatan harian dilakukan terhadap perubahan pH, bau, serta pengembangan balon sebagai indikator terbentuknya gas biogas. Hasil penelitian menunjukkan bahwa pembentukan gas mulai terjadi pada hari kedua dan mencapai puncak pada hari keempat yang ditandai dengan balon mengembang secara maksimal. Pada hari kelima dan keenam, volume gas mulai menurun, menandakan bahwa proses fermentasi hampir selesai. Dari hasil ini dapat disimpulkan bahwa limbah buah anggur dapat dimanfaatkan sebagai bahan baku pembuatan biogas dengan menggunakan alat sederhana tanpa tambahan bahan kimia lainnya. Proses ini menjadi contoh penerapan bioteknologi sederhana dalam kehidupan sehari-hari yang mendukung pelestarian lingkungan dan penyediaan energi terbarukan.
Kata Kunci: Limbah Buah Anggur, Biogas, Bioteknologi, Energi Terbarukan, Lingkungan