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Ulfah, Maria
Chemical Engineering Department, Faculty Industrial Technology, Universitas Bung Hatta Jl. Gajah Mada No. 19, Padang 25143, Sumatera Barat
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Social Sciences

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INOVASI KONSEP ZERO WASTE PADA KELOMPOK PENGOLAH IKAN DI KELURAHAN PASIA NAN TIGO KECAMATAN KOTO TANGAH KOTA PADANG Yusra Yusra; Maria Ulfah; Dessi Mufti
Jurnal Vokasi Vol 5, No 2 (2021): Jurnal Vokasi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/vokasi.v5i2.2304

Abstract

Sentra Pengolahan Perikanan Pasia Nan Tigo (SP3N) merupakan unit pengolahan ikan (UPI) yang berada Kelurahan Pasia Nan Tigo Kecamatan Koto Tangah Kota Padang. Ikan yang dominan diolah di SP3N ini adalah ikan teri kering (tawar dan asin). Mitra yang menjadi sasaran dari kegiatan PKM ini adalah nelayan pengolah ikan yang terdapat di SP3N yang berjumlah 20 orang. Metode yang dilakukan dalam PKM ini adalah penyuluhan dalam bentuk sosialisasi, pelatihan dan praktek langsung yang bertujuan untuk meningkatkan pengetahuan dan keterampilan mitra dalam bidang teknologi pengolahan limbah perikanan. Metode yang dilakukan dalam pelaksanaan pengabdian pada masyarakat ini adalah: 1) Persiapan sosialisasi kegiatan, 2) Penyuluhan dan pelatihan tentang: teknologi pengolahan limbah perikanan menjadi pupuk organik cair (POC), pembuatan tepung ikan, pengolahan petis, mpek mpek, aplikasi POC pada tanaman sayur (bayam dan caisim), teknologi pengemasan dan manajemen sederhana. 3) Pendampingan terhadap kualitas produk yang dihasilkan dan 4) Evaluasi pelaksanaan kegiatan pengabdian kepada masyarakat
POTENSI KATALIS PADAT ASAM GAMMA ALUMINA TERSULFATASI PADA REAKSI ESTERIFIKASI MINYAK BIJI KARET Maria Ulfah; S Subagjo
Reaktor Volume 16 No.3 September 2016
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (399.365 KB) | DOI: 10.14710/reaktor.16.3.109-115

Abstract

POTENTIAL OF SULFATET ALUMINA-HETEROGENEOUS ACID CATALYST IN ESTERIFICATION RUBBER SEED OIL.  Two tipe of  catalysts have been synthesed and evaluated ( free fatty acid conversion) in esterification of rubber seed oil. The first and the second catalyst have content SO3 8,821 % and 40,715 %, respectly. The optimum condition of reaction studied : volume ratio methanol/oil  0,9-1,8 v/v;  catalyst concentration 1,67-10 % wt/v; time of reaction 1-7 hours and temperature of reaction 50-70 oC. This study  showed, the second catalyst  more active than the first catalyst. Maximum conversion from esterification reaction of rubber seed oil of the first and the second catalyst are 75 % and  97 %, respectly. The optimum condition of reaction achieved at volume ratio methanol/oil  1,8 v/v;  catalyst concentration 1,67 % wt/v; time of reaction 7 hours and temperature of reaction 70 oC.   Keywords: sulfated alumina, free fatty acid, eterification, rubber seed oil.AbstrakDua tipe katalis alumina tersulfatasi telah disintesis dan dievaluasi kinerjanya (berupa konversi Asam Lemak Bebas, ALB) pada reaksi esterifikasi asam lemak bebas minyak biji karet. Katalis tipe 1 dan tipe 2 berturut-turut memiliki kandungan SO3 8,821 % dan 40,715 %.  Kondisi optimasi reaksi yang dipelajari: rasio volume metanol/minyak 0,9-1,8 v/v; konsentrasi katalis 1,67-10 % b/v; waktu reaksi 1-7 jam dan temperatur reaksi 50-70 oC.  Hasil penelitian menunjukkan katalis tipe 2 lebih aktif dari tipe 1. Konversi ALB maksimum  dari reaksi esterifikasi minyak biji karet  dengan katalis tipe 1 dan tipe 2  berturut-turut 75 % dan 97 %.  Kondisi  optimum reaksi tersebut dicapai pada rasio volume metanol/minyak 1,8; konsentrasi katalis/minyak 1,67 % b/v; lama reaksi 7 jam dan temperatur reaksi 70 oC. Kata kunci: alumina tersulfatasi, asam lemak bebas, esterifikasi, minyak biji karet
KINETIKA HIDRODESULFURISASI DIBENZOTHIOPHENE (HDS DBT) MENGGUNAKAN KATALIS NiMo/γ-Al2O3 Subagjo Subagjo; Maria Ulfah
Reaktor Volume 14, No. 4, OKTOBER 2013
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (750.063 KB) | DOI: 10.14710/reaktor.14.4.314-323

Abstract

Evaluasi kinetika reaksi hidrodesulfurisasi (HDS) dibenzothiophene dan simulasi nafta hydrotreater yang berada di PT. PERTAMINA Refinery Unit II Dumai menggunakan katalis NiMo/Al2O3 hasil pengembangan telah dilakukan. Kinetika reaksi HDS DBT dilakukan dalan sistem reaktor batch dengan variasi temperatur 280-320oC dan tekanan 30 bar. Data kinetika diolah dengan persamaan hukum pangkat (law power) dan persamaan kinetik mekanistik (Langmuir Hinshelwood, LH). Berdasarkan model hukum pangkat, kinetika HDS DBT menggunakan NiMo/Al2O3 hasil pengembangan merupakan  orde satu  terhadap DBT dengan konstanta Arhenius  sebesar 165633 detik-1 dan energi aktivasi 69017 J/mol (16,56 kkal/mol). Model LH yang cocok untuk reaksi HDS DBT menggunakan NiMo/Al2O3 hasil pengembangan adalah model LH yang mengilustrasikan adanya kompetisi antara reaktan DBT dan H2 pada tipe pusat aktif yang sama, dengan DBT teradsorb secara kuat sedangkan H2 teradsorpsi secara lemah. Energi aktifasi dan konstanta Arhenius berdasarkan model LH ini ini berturut-turut adalah 81409 J/mol (19,34 kkal/mol) dan 1658133 s-1. Dengan menggunakan persamaan laju reaksi hukum pangkat, model memberikan hasil konversi sulfur yang sama dengan hasil keluaran reaktor nafta hydrotreater RU II-Dumai, yaitu mencapai 98%.
PENGARUH PERBEDAAN SIFAT PENYANGGA ALUMINA TERHADAP SIFAT KATALIS HYDROTREATING BERBASIS NIKEL-MOLIBDENUM Maria Ulfah; Subagjo Subagjo
Reaktor Volume 14, Nomor 2, Oktober 2012
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (146.906 KB) | DOI: 10.14710/reaktor.14.2.151-157

Abstract

EFFECT OF ALUMINA SUPPORT PROPERTIES ON THE NICKEL-MOLIBDENUM BASE HYDROTREATING CATALYST. Effect of surface characteristics of three species of synthesized γ-alumina (alumina-1, alumina-2 and alumina-3) on characteristics NiMo catalysts has been studied. Those aluminas are derived from boehmite Catapal B by varying rasio mol nitric acid to boehmite. A sol-gel method is used to synthesize γ-Al2O3 support. The Nitrogen adsorption, X-ray diffraction (XRD), Temperature Programmed Reduction (TPR) of H2, Temperature Programmed Desorption (TPD) of NH3, and mechanical strength are used to characterize the supports and catalysts. The results showed that the surface area alumina affects the formation of crystalline MoO3 in the NiMo catalyst, while γ-Al2O3-3 support which has the highest surface area (about 195 m2/g) compared to the other two types of alumina (>195 m2/g) does not have a crystalline MoO3. The formation of crystalline MoO3 is not influenced by the acidity alumina. Based on the results of XRD, it is  indicated that the supported alumina-3 NiMo catalyst (having the highest acid strength) shows that there is no presence of crystalline MoO3. Pore size distribution of support did not change significantly after the deposition of Ni and Mo oxides. Mechanical strength of support also affects the strength NiMo catalyst. Support alumina-3 which has the highest mechanical strength gives the mechanical strength of the highest NiMo catalyst. Pengaruh sifat penyangga γ-alumina hasil pengembangan (alumina-1, alumina-2 dan alumina-3) pada karakter katalis hydrotreating nikel-molibdenum (NiMo) telah dipelajari. Ketiga jenis γ-alumina diturunkan dari boehmite “Catapal B” dengan menvariasikan nisbah mol asam nitrat terhadap boehmite. Pembuatan γ-alumina menggunakan metoda sol-gel. Adsorpsi Nitrogen, X-ray difraksi (XRD), Temperature Programmed Reduction (TPR) H2, Temperature Programmed Desorption (TPD) NH3, dan kekuatan mekanik digunakan untuk mengkarakterisasi penyangga dan katalis. Hasil penelitian menunjukan bahwa luas permukaan alumina mempengaruhi pembentukan kristalin MoO3 dalam katalis NiMo. Pada penyangga alumina-3 yang memiliki luas permukaan yang paling tinggi (sekitar 195 m2/g) di banding dua jenis alumina lainnya (>195 m2/g) tidak memiliki kristalin MoO3. Pembentukan kristalin MoO3 tidak dipengaruhi oleh sifat keasaman alumina. Berdasarkan hasil XRD ditunjukan bahwa pada katalis NiMo berpenyangga alumina-3 (memiliki kekuatan asam yang paling tinggi) tidak terdapat adanya kristalin MoO3. Distribusi ukuran pori peyangga tidak berubah signifikan setelah deposisi oksida Ni dan Mo. Kekuatan mekanik penyangga mempengaruhi pula kekuatan katalis NiMo. Penyangga γ Al2O3-3 yang memiliki kekuatan mekanik yang paling tinggi memberikan kekuatan mekanik katalis NiMo yang tertinggi.
PELATIHAN PEMBUATAN SABUN CUCI PIRING SEBAGAI PEMBEKALAN KETERAMPILAN KEPADA WARGA BINAAN LEMBAGA PENDIDIKAN KHUSUS ANAK KLAS IIB TANJUNG PATI Inna Kholidasari; Maria Ulfah; Wenny Marthiana
Jurnal Media Pengabdian Kepada Masyarakat Vol. 1 No. 1 (2022): JM-PKM
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (930.29 KB) | DOI: 10.37090/jmpkm.v1i1.577

Abstract

ABSTRACT The skills improvement is a crucial aspect by the children/teenagers in Lembaga Pendidikan Khusus Anak (LPKA) Klas IIB Tanjung Pati, Lima Puluh Kota Regency, the Province of West Sumatra. These children really need education and trainings that could be used for their life when they are come into community. One of training has been conducted for them by the lecturer Fakultas Teknologi Industri Universitas Bung Hatta and some students. The training was about how to makedish washing liquid . Dish washing liquid is a product that always needed in daily life. This kind of dish washing is more popular than other types. The process of making this washing liquid is very simple and the materials can be obtained easily and the price of the materials are also very cheap. These are the reason why the training was conducted. The training ws followed by a discussion relating to the business of selling the dish washing liquid. Hope the trainingis very useful for the children at PLKA Klas IIB Tanjung Pati.
PELATIHAN PEMBUATAN PAVING BLOCK DARI SAMPAH PLASTIK KE JASA KEBERSIHAN KAMPUS Maria Ulfah; Burmawi Burmawi; Arnita Arnita; Inna Kholidasari; Yusra Yusra
Jurnal Media Pengabdian Kepada Masyarakat Vol. 1 No. 1 (2022): JM-PKM
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (987.838 KB) | DOI: 10.37090/jmpkm.v1i1.579

Abstract

ABSTRACT Training on making paving blocks from plastic waste (colored and or clear bags) for cleaning services of campus 3 Universitas Bung has been conducted. The Community Service (PKM) aims to transfer knowledge and skills in the manufacture of paving blocks which have a higher selling value than plastic bag waste. The long-term goal of this program is to support the Padang City Government program to reduce the amount of waste to the Final Disposal Site and become a community business opportunity to increase sources of income. The methods used in this PKM are: 1) preparation of socialization activities, and 2) counseling and training. The campus cleaning service is enthusiastic about this activity and considers that the training adds to their insight in the utilization of plastic waste into paving blocks, which they never knew about that.
Optimization of sustainable biodiesel production from waste cooking oil using heterogeneous alkali catalyst M Andrifar; Fadjar Goembira; Maria Ulfah; Rika Putri; Rati Yuliarningsih; Rizki Aziz
Jurnal Rekayasa Proses Vol 16, No 2 (2022)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.74373

Abstract

The increasing world population, rapid industrialization, urbanization, and economic growth have led to a continuous increase in the consumption of fossil fuels to meet the ever-increasing demand for energy. Continuous emissions from burning fossil fuels will create a need to find appropriate and sustainable substitutes for fossil fuels. Biodiesel is the right alternative solution for diesel engines because it is renewable, non-toxic, and environmentally friendly. Waste cooking oil (WCO) from the food, non-food, restaurant, and household sectors is produced on a large scale in every country and can contribute to environmental pollution if proper disposal systems are not applied. Instead of throwing it landfills Environmental pollution can be minimized by recycling WCO. This study evaluates the potential of using WCO to produce biodiesel using zeolite synthesized from fly ash as a heterogeneous alkali catalyst through a transesterification reaction. The reactor in this study used a 1,000 ml three-necked boiling flask equipped with a condenser, cooling tank, and pump. Stirring and heating during the process of biodiesel production using a magnetic stirrer and a hot plate. The thermometer is used to measure the reaction temperature. Optimization of biodiesel production from zeolite catalyst synthesized from fly ash based on variations in the ratio of methanol: oil (8:1; 10:1; 12:1; and 14:1), catalyst weight (1, 2, 3, and 4% weight), and temperature (45 oC, 55 oC, and 65oC). Zeolite from fly ash produces biodiesel with a yield of 91.67% with optimum operating conditions reaction time of 60 minutes, methanol oil ratio of 8:1, operating temperature 55oC, and the amount of catalyst 1% by weight. This experiment confirms the possibility of utilizing fly ash waste for the application of catalysts in biodiesel production.
Optimization of sustainable biodiesel production from waste cooking oil using heterogeneous alkali catalyst M Andrifar; Fadjar Goembira; Maria Ulfah; Rika Putri; Rati Yuliarningsih; Rizki Aziz
Jurnal Rekayasa Proses Vol 16, No 2 (2022)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.74373

Abstract

The increasing world population, rapid industrialization, urbanization, and economic growth have led to a continuous increase in the consumption of fossil fuels to meet the ever-increasing demand for energy. Continuous emissions from burning fossil fuels will create a need to find appropriate and sustainable substitutes for fossil fuels. Biodiesel is the right alternative solution for diesel engines because it is renewable, non-toxic, and environmentally friendly. Waste cooking oil (WCO) from the food, non-food, restaurant, and household sectors is produced on a large scale in every country and can contribute to environmental pollution if proper disposal systems are not applied. Instead of throwing it landfills Environmental pollution can be minimized by recycling WCO. This study evaluates the potential of using WCO to produce biodiesel using zeolite synthesized from fly ash as a heterogeneous alkali catalyst through a transesterification reaction. The reactor in this study used a 1,000 ml three-necked boiling flask equipped with a condenser, cooling tank, and pump. Stirring and heating during the process of biodiesel production using a magnetic stirrer and a hot plate. The thermometer is used to measure the reaction temperature. Optimization of biodiesel production from zeolite catalyst synthesized from fly ash based on variations in the ratio of methanol: oil (8:1; 10:1; 12:1; and 14:1), catalyst weight (1, 2, 3, and 4% weight), and temperature (45 oC, 55 oC, and 65oC). Zeolite from fly ash produces biodiesel with a yield of 91.67% with optimum operating conditions reaction time of 60 minutes, methanol oil ratio of 8:1, operating temperature 55oC, and the amount of catalyst 1% by weight. This experiment confirms the possibility of utilizing fly ash waste for the application of catalysts in biodiesel production.
Penambahan Logam Pengotor (Au) Terhadap Karaktersitik Mercury (Hg) Silvi Octavia; Maria Ulfah
Jurnal Katalisator Vol 3, No 1 (2018): KATALISATOR
Publisher : LLDIKTI Wilayah X

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (281.651 KB) | DOI: 10.22216/jk.v3i1.3352

Abstract

Merkuri (Hg) digunakan sebagai bahan untuk mengikat emas pada pertambangan emas.  Emas yang terikat pada merkuri kemudian dipisahkan dengan jalan penyaringan dan pemanasan.  Kehadiran emas atau bahan pengotor lainnya dalam merkuri dapat menyebabkan perubahan karakteristik merkuri tersebut. Karakteristik merkuri ini identik dengan nilai densitas merkuri.  Dimana, densitas merkuri murni adalah 13,6 gr/cm3. Nilai densitas akan mempengaruhi nilai jual merkuri. Beberapa pasar menghendaki  densitas yang lebih tinggi dari densitas merkuri murni. Untuk itu dilakukan penelitian efektifitas penambahan logam pengotor berupa emas terhadap kenaikkan nilai densitas merkuri dan kelarutan emas dalam merkuri yang tidak dapat dipisahkan hanya dengan pemanasan. Persamaan yang digunakan untuk menghitung jumlah emas yang akan ditambahkan untuk menaikkan densitas merkuri (pada suhu kamar = 270C)  adalah y=0,022x + 13,722. Dimana y adalah densitas merkuri dan x adalah jumlah penambahan emas. Nilai kelarutan emas didalam merkuri adalah 0,03 gr/ml.
Co-Authors Arnita Arnita Burmawi Burmawi Dessi Mufti Fadjar Goembira Inna Kholidasari M Andrifar Rati Yuliarningsih Rika Putri Rizki Aziz S Subagjo Silvi Octavia Subagjo Subagjo Subagjo Subagjo Wenny Marthiana Yusra, Yusra