Article Per Year (5 Year)
p-Index From 2020 - 2025
0.817
P-Index
This Author published in this journals
All Journal Agrointek Jurnal Teknik Kimia Chemistry Indonesian Journal of Chemical Research Journal of Renewable Energy, Electrical, and Computer Engineering JURNAL REKAYASA KIMIA & LINGKUNGAN
Pusfitasari, Memik Dian
Institut Teknologi Kalimantan, Kampus ITK Karang Joang, Balikpapan, 76127
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
STUDI PENAMBAHAN MIKROORGANISME PADA SUBSTRAT LIMBAH POME TERHADAP KINERJA MICROBIAL FUEL CELL Yogaswara, Rachmad Ramadhan; Farha, Ayu Shafira; Khairunnisa, Khairunnisa; Pusfitasari, Memik Dian; Gunawan, Adrian
Jurnal Teknik Kimia Vol 12, No 1 (2017): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v12i1.839

Abstract

Sel bahan bakar (fuel cell) sebagai sumber energi listrik alternatif yang menggunakan prinsip reaksi bioelektrokimia dengan memanfaatkan mikroorganisme disebut Microbial Fuel Cell (MFC). Substrat dan mikroorganisme merupakan hal yang sangat berpengaruh terhadap kinerja MFC dalam memproduksi energi listrik. Penelitian ini bertujuan untuk mengkaji pengaruh penambahan mikroorganisme ke dalam substrat terhadap kinerja MFC. Substrat yang digunakan adalah limbah cair pengolahan kelapa sawit yang sering disebut POME (palm oil mill effluent). Terdapat dua jenis mikroorganisme yang masing – masing ditambahkan ke dalam substrat POME, yakni Saccharomyces cerevisiae dan bakteri Escherichia coli. Proses bio-listrik ini dilakukan dengan dual-chamber reactor sebagai anoda dan katoda yang dihubungkan dengan jembatan garam dan terdapat elektroda di setiap chamber yang dihubungkan dengan kabel tembaga. Hasil yang didapatkan adalah penambahan S. cerevisiae menurunkan power density yang dihasilkan oleh MFC dibandingkan dengan POME murni. Sebaliknya, penambahan bakteri E. coli ke dalam substrat POME membuat listrik yang diproduksi oleh MFC semakin meningkat. Power density tertinggi yang diperoleh pada penambahan S. cerevisiae sebesar 103,15 mW/m2, sebaliknya pada penambahan E. coli diperoleh power density tertinggi sebesar 103,02 mW/m2. DOI : https://doi.org/10.33005/tekkim.v12i1.839
PENURUNAN KADUNGAN BESI (Fe) DALAM AIR TANAH DENGAN METODE ELEKTROKOAGULASI Pusfitasari, Memik Dian; Yogaswara, Rachmad Ramadhan; Jiwantara, Dhebby Mas; Daud, Daud; Anggara, Ikhwan Rifki
Jurnal Teknik Kimia Vol 12, No 2 (2018): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v12i2.1087

Abstract

Keberadaan besi dalam air tanah sebagai salah satu sumber bahan baku air bersih telah menjadi perhatian banyak pihak terutama karena dampaknya terhadap kesehatan. Oleh karena itu, kajian untuk menurunkan kandungan besi dalam air tanah telah dilakukan dengan menggunakan metode elektrokoagulasi. Proses elektrokoagulasi dilakukan secara batch selama 6 jam, jarak antar elektroda diatur 2 cm dengan beda potensial yang divariasikan. Pada dasarnya, penurunan besi dilakukan melalui 2 tahap yaitu proses oksidasi besi dan pembentukan besi oksida yang diikuti oleh presipitasi. Hasil Analisis sampel air yang dilakukan dengan metode AAS menunjukkan bahwa seiring dengan semakin besarnya beda potensial yang digunakan, Fe yang tereduksi semakin besar. Adapun penurunan tertinggi terjadi pada 20 volt sebesar 99,7% Untuk presipitat yang dihasilkan dianalisis dengan metode XRD dimana hasil analisis menunjukkan bahwa presipitat yang dihasilkan merupakan magnetite murni dalam bentuk kristalinDOI : https://doi.org/10.33005/tekkim.v12i2.1087
Water Stability Characteristic of Nile Tilapia (Oreochromis niloticus) Feed Coated with Tapioca Flour-beeswax-based Edible Coating Maharsih, Inggit Kresna; Tarmidzi, Fadhil Muhammad; Pusfitasari, Memik Dian; Alviany, Riza; Yuli, Ahmad; Asnawi, Asnawi
Indonesian Journal of Chemical Research Vol 11 No 2 (2023): Edition for September 2023
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2023.11-ing

Abstract

One of the reasons in increasing water turbidity in nile tilapia aquaculture is the presence of spoilage in fish feed that is easily disintegrate and decompose as organic matters in the water. Therefore, a thin layer or edible coating is needed to coat the tilapia feed to slow down the decomposition of the feed due to water absorption. The main ingredients for tilapia feed are tapioca flour added with beeswax solution and glycerol as a plasticizer. In this study, the glycerol concentrations used were 3%, 5%, and 7%, and the beeswax concentrations used were 0.25% w/v, 0.50 % w/v, and 0.75 % w/v. The purpose of this study was analysed the effect of plasticizers and beeswax on the characteristics of the edible coating. The method used to coat tilapia feed is the dipping method, where the product is dipped in a coating solution. The results of the research can be demonstrated by performing a and functional group test using FTIR spectra, contact angle test, and water resistance test of coated fish feed.
Surface Modification of Carbon Nanotubes (Cnnts) as Electrode of Hybrid Energy Storage Device (Supercapacitor) Reza, Mutia; Pusfitasari, Memik Dian; Ernawati, Lusi; Sari, Thalia Winda; Wardhani, Ranti Kusuma; Sylvia, Novi; Maharsih, Inggit Kresna
Journal of Renewable Energy, Electrical, and Computer Engineering Vol. 5 No. 1 (2025): March 2025
Publisher : Institute for Research and Community Service, Universitas Malikussaleh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/jreece.v5i1.20250

Abstract

Supercapacitors have an advantage in the form of a higher specific capacitance than conventional capacitors. This alternative is the right idea if it is used to solve the problem of using hybrid energy storage demand. This study aims to analyze the variation in the ratio between activator and carbon nanotubes (Cnnts) that function as electrodes. Electrodes are one of the constituent components of supercapacitors, so they are important to review. Electrodes in the form of Cnnts activated using H2SO4 and HNO3 were analyzed through SEM and FTIR characterization. The activation process produces mesoporous size on the electrode. The activation method is also able to form aromatic compounds that are important for heat stability and electrical conductivity.
Production of Rubber Seed Oil: Study of Parameters and some Food Oil Properties Yuniar, Rizka Ayu; Pusfitasari, Memik Dian; Kumalaningrum, Amalia Nur; Malcheli, Etni Jechonia; Saleha, Shela; Silmina, Silmina
Jurnal Rekayasa Kimia & Lingkungan Vol 19, No 1 (2024): Jurnal Rekayasa Kimia & Lingkungan (June 2024 )
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v19i1.37167

Abstract

Rubber seeds are one of the plantation commodities that are underutilized by the Indonesian people, apart from being the generative seeds of rubber trees. Rubber seeds have a reasonably high vegetable oil content of 68.53% with a carbohydrate content of 6.99%, protein content of 17.41%, and ash content of 3.08%. This study aimed to obtain food oil from rubber seeds with fewer chemicals and more affordable production costs. This study investigates the properties of food oil from rubber seeds and analyzes the cyanide content. The oil extracted using the traditional method yielded an 8.48% oil content. The rubber seeds were soaked for four days with rice husk charcoal (1:1) to reduce cyanide levels, followed by cooking to obtain the oil and bleaching with bentonite for purification. The oil was characterized according to Indonesian National Standards (SNI), assessing cyanide content, organoleptic properties, water content, acid values, and peroxide numbers. The resulting oil had a density of 0.87 g/cm and a cyanide content of 0.54 ppm. The tests showed a water content of 0.04%, an acid value of 0.4 mg NaOH/g, and organoleptic properties that met SNI standards. However, the peroxide value of 13.5 meq O2/kg was slightly above the standard, making the oil non-edible.
Pemanfaatan sumber daya lokal biji karet sebagai amplifikasi protein es krim mellorine dengan pengemulsi CMC Hidayat, Jefri Pandu; Pusfitasari, Memik Dian; Gunawan, Ryan Ananda Dwi; Fahlevi, Riza
AGROINTEK Vol 19, No 3 (2025)
Publisher : Agroindustrial Technology, University of Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/agrointek.v19i3.25663

Abstract

Rubber plants in East Kalimantan have a great plantation area 123,460 ha consisting of smallholder 95,240 ha, large state 3,630, and large private 25,638 hectares, with a total production of 55,690 tons. The abundant production of rubber plants in East Kalimantan is still utilized in the tree trunk part as raw material for making latex. The rubber seeds as dregs have not been optimally utilized. Rubber seeds are relatively high in nutrition, especially protein content 16.33%, 21.6% fat, and 30.9% carbohydrates. The rubber seeds are less optimally used due to high HCN levels. The possibility diversification of rubber seed is employing the mellorine ice cream. This study aims to analyze the decreasing HCN levels in the boiling time of rubber seeds at (0, 30, 60, 90, and 100 minute) and formulation of rubber seed and water ratio (A1-3:1); (A2-1,5:1); (A3-1:1) by complete randomized design (CRD) on proximate and organoleptic properties. It was found by ANOVA that the proportion of ingredients did not affect the organoleptic color and aroma but significantly swayed the texture and taste. The organoleptic scale is (0-5) and is not within the very likely criteria. The ratio prescription influences mellorine ice cream's physicochemical, where the more rubber seeds used, the higher proximate levels. The best formulation is A1 (3:1), where it gets an organoleptic value of color (4.25), aroma (3.5), texture (4.00), taste (4.40), 0.127% ash content, fat 8.36%, protein 1.57%, carbohydrate 9.08 %, and crude fibre 0.50%. Ultimately, the rubber seeds can be processed into protein source materials for mellorine ice cream, but the protein is still below SNI standards. A modification method is needed to release HCN but does not cause excessive protein denaturation.
Co-Authors Adrian Gunawan, Adrian Anggara, Ikhwan Rifki Asnawi Asnawi Daud, Daud Ernawati, Kadek Lusi Fadhil Muhammad Tarmidzi Fahlevi, Riza Farha, Ayu Shafira Gunawan, Ryan Ananda Dwi Jefri Pandu Hidayat Jiwantara, Dhebby Mas Khairunnisa Khairunnisa Kumalaningrum, Amalia Nur Maharsih, Inggit Kresna Malcheli, Etni Jechonia Novi Sylvia Reza, Mutia Riza Alviany Rizka Ayu Yuniar Saleha, Shela Sari, Thalia Winda Silmina, Silmina Wardhani, Ranti Kusuma Yogaswara, Rachmad Ramadhan Yuli, Ahmad