E-Journal Politeknik Negeri Cilacap
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Pengomposan Beberapa Macam Hasil Samping Perkebunan Sawit (Tankos dan Daun) dengan Berbagai Dekomposer : Composting Several Kinds of Palm Plantation Side Products (Tankos and Leaves) with Various Decomposers
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This research examines the potential of oil palm leaves as raw material for compost, carried out in Bandar Pasir Mandoge Village, North Sumatra, from March to May 2023, using a Completely Randomized Design (CRD) with two main factors: compost material and type of decomposer. The compost material consists of tankos, leaves, and a mixture of tankos+leaves, while the decomposer consists of decomposers D1, D2, and D3. The parameters measured include C/N ratio, weight loss, compost color, compost odor, compost pH value, compost temperature, compost humidity, and compost friability. The research results showed significant variations in C/N ratio values ​​for organic materials, with values ​​ranging from 12 to 38. Compost material from leaves with D1 decomposer achieved the lowest C/N ratio value, while tankos compost with D1 decomposer had the highest value. Decomposer D2 is more effective in speeding up the decomposition process compared to D1 and D3. The fastest compost shrinkage occurred in the treatment with D3 decomposer, while the longest shrinkage occurred in the treatment with D1 decomposer. This research supports the principles of sustainable agriculture by utilizing high fiber organic waste and reducing environmental pollution. Tankos organic material decomposes the fastest, and the D2 decomposer is more effective than other decomposers. There is a real interaction between organic materials and decomposers on compost quality.
Keywords: Tankos, leaves, compost, decompose
IoT Based Hydroponic Water Nutrient and pH Monitoring with Real-Time Notifications
Get PDFIndonesia is an agricultural country whose population lives from the agricultural sector, the Government has encouraged agriculture to realize the use of modern technology for the agricultural sector which is useful for increasing farmer productivity and making farmers\u27 work easier with quality harvests, as well as more efficient food security in Indonesia. One way to save time and energy for farmers to find out nutrients and pH is by using a nutrient and pH monitoring system for hydroponic plant water. The purpose of this research is to create an IoT-based automatic system, used for systematic real-time monitoring of water nutrients in hydroponic plants using a TDS sensor to measure the mass weight of nutrients and a pH meter to measure the acidity of water, a DHT22 sensor to measure temperature and humidity, and a DSB18B20 sensor to measure water temperature, the data obtained from these sensors will be displayed on the LCD. The final result of the tool created is a nutrient and pH monitoring system for water in pakcoy plants, the results of sensor readings will be sent in real-time to the dashboard and WhatsApp. This research method uses the R and D (Research and Development) method with the ADDIE (analyze, design, develop, implement, evaluate) model. The IoT expert validation value was 0.91 (very appropriate) and the farmer effectiveness validation value was 0.85 (very effective). The outputs generated from this research can be used to make it easier for hydroponic farmers to monitor plant nutrient balance automatically and systematically
Comparative Analysis of C4.5 and Random Forest for Analyzing Factors Affecting Undergraduate Students’ Final Project Completion in Higher Education
Get PDFThis study analyzes factors influencing students’ final project completion status in a higher education context using six classification models: C4.5, Random Forest (RF), C4.5 with SMOTE, RF with SMOTE, Cost-Sensitive Random Forest (RF-CS), and Cost-Sensitive C4.5 (C4.5-CS). The dataset consists of 1,017 student records categorized into Ideal and Tidak Ideal, with a severe class imbalance where the minority class represents only 16.49% of the data.The results indicate that baseline models achieved high overall accuracy but showed limited effectiveness in identifying the minority Tidak Ideal class. SMOTE-based models improved minority-class recall but introduced a higher number of false positives, highlighting a trade-off between recall and precision. In contrast, cost-sensitive learning produced the most substantial improvement in minority-class detection. Among all evaluated models, Cost-Sensitive Random Forest demonstrated the most balanced performance by significantly reducing false-negative errors while maintaining reasonable overall accuracy.These findings confirm that algorithm-level cost-sensitive approaches are more effective than oversampling techniques for handling severe class imbalance in educational datasets. The proposed model provides a reliable basis for early identification of students at risk of delayed final project completion and supports data-driven academic decision-makin
Rancang Bangun Mesin Pengemasan Pupuk Kompos Limbah Penyulingan Minyak Kayu Putih Berbasis Sistem Kendali PLC
Get PDFUjungmanik Village has a eucalyptus oil distillery with essential oil products produced of 100 kg per year. The problem is that the waste from the eucalyptus oil distillation, in the form of twigs and leaves from the eucalyptus oil distillation, accumulates and reduces the production area. The purpose of this study was to design a eucalyptus waste compost fertilizer packaging machine with the addition of a load cell sensor. The method used in making this compost fertilizer packaging machine is a PLC control system for the packaging section and ESP8266 is used to control the load cell sensor for weighing during the packaging process. The test results show that the eucalyptus oil distillation waste compost fertilizer packaging machine based on the PLC control system is capable of packaging 1000-gram organic fertilizer by the load cell sensor and is capable of packaging 10 plastic bags. Based on the monitoring results through the Blynk application, the packaging has an average value of 994.1 grams and an error percentage of 2.1%Desa Ujungmanik memiliki penyulingan minyak kayu putih dengan produk minyak atsiri yang dihasilkan sebesar 100 kg pertahun. Permasalahan yang terjadi adalah limbah sisa penyulingan minyak kayu putih, berupa ranting dan daun sisa penyulingan minyak kayu putih menumpuk dan mengurangi area produksi. Tujuan penelitian ini untuk membuat rancang bangun mesin pengemasan pupuk kompos limbah kayu putih dengan tambahan sensor load cell. Metode yang digunakan dalam pembuatan mesin pengemasan pupuk kompos ini dengan sistem kontrol PLC untuk bagian pengemasan dan ESP8266 digunakan untuk kontrol sensor load cell pada penimbangan pada saat proses pengemasan. Hasil pengujian bahwa mesin pengemasan pupuk kompos limbah penyulingan minyak kayu putih berbasis sistem kendali PLC mampu mengemas pupuk organik kapasitas 1000 gram oleh sensor load cell serta mampu mengemas 10 kantong plastik. Berdasarkan hasil monitoring melalui aplikasi blynk, pengemasan memiliki nilai rata-rata sebesar 994,1 gram dan persentase error sebesar 2,1
Potensi Serat Pelepah Nipah Sebagai Bahan Baku Binderless Fiberboard
Get PDFFiberboard uses a lot of agro-industry waste materials combined with synthetic adhesives containing formaldehyde. The weakness of this adhesive is that it can cause health problems such as cancer and eye irritation. Lignin has properties and content similar to formaldehyde. Nipah has lignin and cellulose content that can be developed into binderless fiberboard. The purpose of this study was to analyze the potential of Nipah frond fiber to make a binderless fiberboard. The characteristics of fiberboard that will be explored include density and water content. Nipah frond binderless fiberboard is made using a press machine with a pressure of 50 bar, and a temperature of 100oC for 20 minutes. The density between 0.46-0.52 which is by the requirements of SNI 03-2105-2006 and the water content of 5.98% - 7.70% is also by the requirements of JIS 5908: 2003 and SNI 03-2105-2006. Based on these results, it can be concluded that Nipah fronds can be used as raw material for binderless fiberboard
Analisis Hasil Uji Tarik dan SEM pada Obyek Cetak 3D dari Filamen Limbah Plastik PET
No full text3DPrinting filament from PET plastic bottle waste is one appropriate solution to overcome PET plastic waste. This research aims to develop a PET plastic bottle waste recycling method using extrusion technology into 3DPrinting filament. The filament formed is used in the printing process using a 3DPrinting FDM machine. The printed object specimens were Dogbone ASTMD638 Type V. Previous research used tensile test and macroscopy photography methods to observe the tensile strength. This research used filament-making, tensile test, and SEM test methods. This research showed that PET plastic bottle waste can be recycled into 3DPrinting filaments. Based on the tensile test result, the average maximum tensile stress from lowest to highest in the sequence was 7.4 MPa, 12.4 MPa, and 14.9 MPa. The type of fracture that occurred in the specimen with the highest maximum tensile strength was a brittle fracture
Kajian Dampak Pola Musim dan Perubahan Tata Guna Lahan Terhadap Kualitas Air Sungai Bedadung, Kabupaten Jember
Get PDFDinamika status kualitas air di sungai dipengaruhi oleh pola musim dan perubahan tata guna lahan. Tujuan penelitian ini adalah menganalisis dampak perubahan musim dan perubahan tata guna lahan terhadap kualitas air di Sungai Bedadung, Kabupaten Jember. Metode kuantitatif digunakan sebagai pendekatan pada penelitian ini dengan input data sekunder parameter kualitas air sungai dari Dinas Lingkungan Hidup Kabupaten Jember, selanjutnya dianalisis menggunakan metode Indeks Pencemaran (IP) dan ditranformasikan kedalam nilai Indeks Kualitas Air (IKA). Data tersebut dianalisis untuk mengkorelasikan nilai kualitas air dengan perubahan musim dan perubahan tata guna lahan yang terjadi di sekitar Sungai Bedadung. Hasil penelitian menunjukkan nilai indeks pencemaran di Sungai Bedadung lebih tinggi ketika musim hujan dibandingkan dengan musim kemarau akibat input akumulasi sumber pencemar yang terbawa oleh air hujan dan berdampak pada rendahnya nilai IKA. Nilai IP dan IKA mengalami perubahan dari kategori sedang pada Tahun 2018 menjadi kategori baik pada Tahun 2022. Perubahan nilai IP dan IKA ini dipengaruhi oleh tingginya nilai total fosfat dan nitrat yang berasal dari penggunaan lahan untuk aktivitas pertanian. Pengelolaan kualitas lingkungan perlu mempertimbangkan perubahan tata guna lahan mempengaruhi kualitas air pada Daerah Aliran Sungai.
Kata kunci: Curah hujan, Kualitas Air, Penggunaan-Penutupan lahanSeasonal patterns and land use changes influence the river water quality. The research purpose to determine the impact of seasonal changes and land use changes on water quality in Bedadung River, Jember Regency. The quantitavive method used as the approach using secondary data input of river water quality parameters from the Jember District Environment Agency, then analyzed using the Pollution Index (PI) method that was transformed into the Water Quality Index (WQI) value. The data was analyzed to correlate between the value of water quality with seasonal changes and land use changes in the the Bedadung River. The results showed that the PI value in Bedadung River is higher during the rainy season compare to the dry season due to the input of accumulated pollutant sources carried by rainfall and had an impact on the low value of WQI. The PI and WQI values have changed from the moderate category in 2018 period to the good category in 2022 period. The changes in the PI and WQI value is influenced by the high value of total phosphate and nitrate from land use for agriculturel activities. Environmental quality management needs to consider land use changes affecting water quality in the watershed.
Keywords: Land Use-Land Cover, Rainfall, Water Qualit
Potensi Produksi Biogas Berbahan Baku Campuran Feses Sapi, Rumen Sapi, dan Kulit Pisang
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The utilization of cattle rumen contents, cattle manure, and banana peel waste to produce biogas through anaerobic fermentation is an alternative method to reduce waste in the agricultural and livestock sectors. This study was conducted to determine the quality of each composition, where the compositions in this research included a mixture of cattle rumen contents and cattle manure in 50:50 ratio, a mixture of cattle rumen contents and banana peel waste in 50:50 ratio, and a composition with three materials fermented simultaneously in a 40:30:30 ratio. The study used a biodigester with a batch operating system and single-stage configuration, with the fermentation process occurring in the digester for 17 days. The analysis aimed to assess the quality of biogas produced from each composition, measuring biogas volume and methane gas concentration for each trial. The results indicated that the highest biogas volume was obtained from the substrate composition of cattle rumen contents and banana peel waste (ratio of 50:50), amounting to 325.5 ml, while the highest methane (CH4) content was found in the composition of cattle rumen contents and cattle manure at 18.80% with a carbon dioxide percentage of 23.06%. The best flame test resulted from the experiment consisting of cattle rumen contents and cattle manure.
Keywords: Biodigester, cattle manure, cattle rumen contents, banana waste, methane, biogas volumeABSTRAK
Pemanfaatan isi rumen sapi, feses sapi, dan limbah kulit pisang menjadi biogas melalui proses fermentasi anaerob, merupakan salah satu alternatif untuk mengurangi limbah pada sektor pertanian dan peternakan. Penelitian ini dilakukan untuk mengetahui kualitas pada masing-masing komposisi, yang mana komposisi bahan isian pada penelitian ini yaitu komposisi isi rumen sapi dan feses sapi dengan rasio 50%:50%, komposisi isi rumen sapi dan limbah kulit pisang dengan rasio 50%:50%, sedangkan rasio untuk komposisi dengan tiga bahan yang difermentasikan secara simultan yaitu 40%:30%:30%. Penelitian ini menggunakan digester dengan sistem operasi batch dan konfigurasi single-stage, proses fermentasi berlangsung di dalam digester selama 17 hari. Analisis pada penelitian ini digunakan untuk mengetahui kualitas biogas pada masing-masing komposisi, uji kualitas biogas berupa hasil volume biogas yang dihasilkan dan konsentrasi gas metana yang dihasilkan pada masing-masing percobaan. Hasil yang diperoleh dari penelitian ini yaitu volume biogas terbaik dihasilkan dari komposisi substrat isi rumen sapi dan limbah kulit pisang sebesar 325,5 ml, sedangkan kandungan gas metana (CH4) terbesar terdapat pada komposisi substrat isi rumen sapi dan feses sapi sebesar 18,80% dengan persentase karbon dioksida sebesar 23,06%.
Kata Kunci: Biodigester, feses sapi, isi rumen sapi, limbah pisang,metana, volume bioga
Studi Persebaran Kontaminan Lindi Dalam Air Tanah di Sekitar Lokasi Tempat Pemrosesan Akhir (TPA)
Get PDFThe waste in final disposal site that are not managed properly will have an impact the environment and human health. Leachate from rainwater infiltration or waste decomposition can contaminate groundwater due to leachate seepage into the soil. This research aims to determine the pattern of leachate contaminants migration and to predict the leachate contaminant in groundwater from wells of residents living near the landfill over a certain period. The method used is the Domenico analytical solution, where contaminant transport is influenced by advection, dispersion, retardation, and degradation. Source concentration of model simulation from laboratory tests of leachate samples where COD is 4,960 mg/L, hexavalent chromium is 3.5 mg/L, dissolved lead is 0.034 mg/L, and dissolved aluminium is 1.3 mg/L. The distribution pattern of leachate contaminants shows that the distribution of COD contaminants reaches ± 370 m in the longitudinal direction and ± 100 m in the transverse direction, while the distribution pattern of metal contaminants reaches ± 230 m in the longitudinal direction and ± 70 m in the transverse direction. When variations in the operational age of a landfill are 10, 25, and 50 years, the contaminant content of COD, hexavalent chromium, and aluminium exceeds the required quality standard thresholds, while lead is still within the required quality standard thresholds based on PP Nomor 22 Tahun 2021 (Kriteria Mutu Air Kelas II).
Keywords: landfill, leachate, groundwater, analytical solution, contaminant transport.Sampah di tempat pemrosesan akhir (TPA) yang tidak dikelola dengan baik akan berdampak pada lingkungan dan kesehatan manusia. Lindi yang dihasilkan dari hasil infiltrasi air hujan atau hasil dekomposisi sampah diindikasikan dapat mencemari air tanah akibat merembesnya lindi ke dalam tanah. Tujuan penelitian ini adalah mengetahui pola persebaran kontaminan lindi dan memprediksikan kandungan kontaminan lindi pada air tanah yang bersumber dari sumur warga di sekitar TPA dalam jangka waktu tertentu. Metode yang digunakan solusi analitik Domenico dimana transpor kontaminan dipengaruhi adveksi, dispersi, retardasi, dan degradasi. Konsentrasi awal pada simulasi model berasal dari uji laboratorium sampel lindi dimana COD sebesar 4.960 mg/L, krom heksavalen sebesar 3,5 mg/L, timbal terlarut sebesar 0,034 mg/L, dan alumunium terlarut sebesar 1,3 mg/L. Pola persebaran kontaminan lindi menunjukkan persebaran kontaminan COD mencapai ± 370 m arah longitudinal dan ± 100 m arah transversal sedangkan pola persebaran kontaminan logam mencapai ± 230 m arah longitudinal dan ± 70 m arah transversal. Berdasarkan simulasi model dengan variasi usia operasional TPA pada 10, 25, dan 50 tahun jika kondisi tidak adanya pengelolaan lindi, maka kandungan kontaminan COD, krom heksavalen, dan alumunium melebihi ambang batas baku mutu yang dipersyaratkan sedangkan kontaminan timbal masih diambang batas baku mutu yang dipersyaratkan berdasarkan PP Nomor 22 Tahun 2021 (Kriteria Mutu Air Kelas II).
Kata kunci: air tanah, landfill, lindi, solusi analitik, tranpor kontaminan
Pemanfaatan Limbah Dapur Sebagai Pupuk Organik Cair (POC) Serta Efetivitasnya Pada Tanaman Sawi (Brassica Juncea L.)
Get PDFPermasalahan sampah organik rumah tangga yang belum tertangani secara optimal mendorong adanya solusi yang ramah lingkungan dan bernilai ekonomis, salah satunya dengan mengolah sampah organik rumah tangga menjadi pupuk organik cair (POC). Penelitian ini bertujuan untuk menganalisis pemanfaatan limbah dapur sebagai POC serta menguji efektivitasnya terhadap pertumbuhan tanaman sawi (Brassica Juncea L.). Metode yang digunakan adalah eksperimen dengan membandingkan pertumbuhan sawi pada: kelompok kontrol (tanpa POC) dan kelompok perlakuan (diberi POC). POC dibuat dari limbah sayuran rumah tangga melalui proses fermentasi selama tiga minggu. Hasil pengamatan menunjukkan bahwa tanaman sawi yang diberi POC mengalami pertumbuhan yang lebih cepat dan signifikan dibandingkan dengan tanaman sawi yang tidak mendapatkan POC. Perbedaan tinggi tanaman dan jumlah daun yang mencolok terlihat pada hari ke-14. POC terbukti meningkatkan pertumbuhan vegetatif tanaman, meskipun tidak memengaruhi warna daun. Penelitian ini menyimpulkan bahwa POC dari limbah dapur efektif digunakan sebagai alternatif pupuk alami dalam budidaya tanaman sawi dan berpotensi sebagai solusi pengelolaan sampah organik yang ramah lingkungan