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Potential of Cellulose Acetat Separator of Empty Palm Oil Fruit Bunches and Polyvinylidene Fluoride for Energy Storage Applications Ginting, Delovita; Na Duma, Tulus; Rahmadani, Nofia; Suryani, Yola; Haryanti, Rismadani
POSITRON Vol 13, No 1 (2023): Vol. 13 No. 1 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v13i1.63784

Abstract

One of the components that play an important role in maintaining battery security is the separator. The separator plays a role in preventing short circuits due to direct exchange between the anode and cathode in the battery cell. To avoid leakage or short circuit during the process, the separator must have good mechanical properties. For this reason, modifications are needed to improve the characteristics of the separator. The modification process was carried out by mixing Poyvinylidene Fluoride (PVDF) and cellulose acetate (CA) polymers. The CA used in this study was obtained by utilizing natural waste extracts in the form of empty oil palm fruit bunches (EFB). This study aims to see the effect of variations in the addition of CA EFB and PVDF on the characteristics of the resulting separator. Synthesized CA EFB was characterized using Fourier Transfor Infrared (FTIR) spectroscopy which showed that cellulose had been successfully synthesized into cellulose acetate.. The separator produced in this study showed good electrolyte absorption, indicated by the occurrence of an oxidation-reduction reaction process on the hysteresis curve with a wider and reversible loop upon the addition of 0.2 g CA. The mechanical characteristics of the separator also increased with the addition of CA concentration, the separator with the addition of 0.3 g CA showed the highest tensile strength value of 62.335 MPa and the highest porosity value of 89.35%. The separator with the addition of 0.3 g of cellulose acetate also decomposes more quickly, indicated by a weight loss percentage of 60%. The results of this test indicate that the addition of CA EFB and PVDF can affect the physical and mechanical characteristics of the separator which has the potential to become a battery separator.
Estimasi Emisi Metana (Ch4) Di Tempat Pembuangan Akhir Kota Pekanbaru Menggunakan Dispersi Aermod Dinda Lestari; Fitri, Yulia; Retnawaty, Sri Fitria; Rahmadani, Nofia; Mulyani, Sri; Mulyani, Selvia
Jurnal Permukiman Vol 19 No 1 (2024)
Publisher : Direktorat Bina Teknik Permukiman dan Perumahan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31815/jp.2024.19.14-22

Abstract

Methane gas is one of the greenhouse gases that is 21 times more potent than C02. Therefore, it is necessary to estimate the quality of pollutants released by landfills around the world. The purpose of this research is to predict the amount of methane emitted from Muara Fajar 2 landfill in Pekanbaru city using Landfill Gas Emissions (LandGEM) model. AERMOD is used to model the distribution of pollutants generated by landfills. This model requires meteorological data such as temperature, temperature, wind direction, wind speed, radiation, air pressure, cloud cover, humidity and cloud base height. The meteorological parameters used in this study are meteorological data obtained from the Climate Data Store (CDS) of Pekanbaru city. The results showed that the peak of methane emissions produced by Muara Fajar 2 Landfill was 19,290 Mg/year in 2049. Pollutant dispersion showed that in 2022 Muara Fajar 2 Landfill produced a dispersion of 2447814 μg/m3. Methane gas pollutants produced by Muara Fajar 2 Landfill have no impact on the surrounding environment.
Prediksi Timbulan Ampas Teh dari Rumah Makan dan Gerai di Kota Pekanbaru Selvia; Fitri, Yulia; Meka, Wahyu; Mulyani, Sri; Lestari, Dinda; Rahmadani, Nofia
Jurnal Teknologi Lingkungan Vol. 25 No. 2 (2024)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jtl.2024.1979

Abstract

Waste from restaurants is not only food waste but also tea grounds, which have sustainable potential. Tea grounds from restaurants and beverage outlets will increase the amount of tea grounds  generated in Pekanbaru. This study aims to calculate and predict the generation of tea waste collected from restaurants and beverage outlets in Pekanbaru City. Restaurants and beverage outlets were selected in this study using Cluster Random Sampling. The Slovin method was used to estimate the number of samples needed. Multiple linear regression analysis was used to test how much influence the number of cups sold per day with the dose of tea used, the category of tea used, temperature, humidity, and rainfall on the amount of tea dregs. The average tea dregs in Pekanbaru City is 61 g/cup, where 79% of the dregs come from tea powder and tea bags contribute 21%. The linear regression model shows that variables that are significantly related to tea dregs include measure per cup (53%), temperature (17%), humidity (6%), cup size (5%), and rainfall (2%), while the number of cups and tea category are not significant. The calculated R2 is 0.844, which means that the proposed model can explain about 84.4% of the variation in the amount of tea dregs generated by restaurants and beverage outlets. The model accuracy test indicated a well-performing model with Mean Absolute Error (MAE), Root Mean Square Error (RMSE), and Mean Absolute Perception Error (MAPE) values of 6.39, 7.06, and 0.82, respectively. In addition to being a source of inspiration for further research in optimizing the use of tea grounds, this invention also has the potential to have a positive impact on the wider community by promoting utilization as a valuable resource. Abstrak Limbah dari rumah makan tidak hanya berupa sisa makanan, tetapi juga ampas teh, yang memiliki potensi yang berkelanjutan. Ampas teh dari rumah makan dan gerai minuman akan meningkatkan timbulan jumlah ampas teh yang dihasilkan di Pekanbaru. Penelitian ini bertujuan untuk menghitung dan memprediksi timbulan ampas teh yang dikumpulkan dari rumah makan dan gerai minuman di Kota Pekanbaru. Rumah makan dan gerai minuman yang dipilih dalam penelitian ini menggunakan Cluster Random Sampling. Metode Slovin digunakan untuk mengestimasi jumlah sampel yang dibutuhkan. Analisis regresi linier berganda digunakan untuk menguji seberapa besar pengaruh jumlah cup yang terjual per hari dengan takaran teh yang digunakan, kategori teh yang digunakan, suhu, kelembaban, dan curah hujan terhadap jumlah ampas teh. Rata-rata ampas teh di Kota Pekanbaru adalah sebesar 61 g/cup, yaitu 79% ampas berasal dari teh bubuk dan teh celup berkontribusi sebesar 21%. Model regresi linear menunjukkan bahwa Variabel yang berhubungan secara signifikan terhadap ampas teh diantaranya takaran per cup (53%), suhu (17%), kelembaban (6%), ukuran cup (5%), dan curah hujan (2%), sedangkan jumlah cup dan kategori teh tidak signifikan. Hasil perhitungan R2 adalah sebesar 0,844, yang berarti model yang diusulkan dapat menjelaskan sekitar 84,4% variasi dalam jumlah ampas teh yang dihasilkan oleh rumah makan dan gerai minuman. Uji akurasi model mengindikasikan model dengan kinerja yang baik dengan nilai Mean Absolute Error (MAE), Root Mean Square Error (RMSE), dan Mean Absolute Perception Error (MAPE) secara berturut-turut sebesar 6,39, 7,06, dan 0,82. Selain menjadi sumber inspirasi bagi riset selanjutnya dalam mengoptimalkan penggunaan ampas teh, penemuan ini juga berpotensi memberikan dampak positif bagi masyarakat luas dengan mempromosikan pemanfaatan sebagai sumber daya yang bernilai.