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All Journal ALKIMIA : Jurnal Ilmu Kimia dan Terapan Kinetika Chemical Engineering Journal Storage (CEJS) Journal Serambi Engineering (JSE)
Tahdid
Politeknik Negeri Sriwijaya
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Social Sciences

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ANALISIS SISTEM TERMAL DITINJAU DARI PENGARUH RASIO UDARA BAHAN BAKAR SOLAR TERHADAP PRODUKSI SATURATED DAN SUPERHEATED STEAM PADA BOILER Tahdid; Fatria; K.A. Ridwan; Salisa Fikamalati; Zenia Zal Putri
KINETIKA Vol. 12 No. 2 (2021): KINETIKA 01072021
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Boiler is a closed vessel used to produce steam. Steam is obtained from heating, whose source comes from the combustion of fuel in furnace. A Cross Section Double Drum Water Tube has two drums (double drum) which are placed crosswise to the heat source and tube is installed in the opposite direction to the drum, then positioned at 65o slope to reduce the force of gravity and to accelerate the evaporation process of water molecules. The fuel used in this research used diesel fuel with air to fuel ratio as a changing (dependent) variable, while 15 liters of fuel and 75 kg of boiler feed water were fixed (independent) variables. The air to fuel ratio used ranged from excess 6% to excess 22%. The calculation results showed that the furnace efficiency saturated and superheated in water tube boiler cross section tool was 69.74% and 69.25% at air to fuel ratio of excess 18% with the saturated and superheated steam pressure had reached the optimum pressure of 5 bar and the convection heat loss was obtained from furnace surface as much as 8.12% and 7.01%.
PENGARUH TEKANAN FLUIDA DAN JENIS AIR BAKU PADA UNIT PENGOLAHAN AIR MINUM MENGGUNAKAN MEMBRANE REVERSE OSMOSIS SILVERTEC ULP-2012-100 Meysin; Yuniar; Erika Dwi Oktaviani; Tahdid
Chemical Engineering Journal Storage (CEJS) Vol. 6 No. 1 (2026): Chemical Engineering Journal Storage (CEJS)-Febuari 2026
Publisher : LPPM Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/cejs.v6i01.25113

Abstract

Air minum yang aman dan berkualitas merupakan kebutuhan penting untuk kelangsungan hidup. Air Minum Isi Ulang (AMIU) sering dipilih masyarakat karena harganya lebih terjangkau dibanding Air Minum Dalam Kemasan (AMDK). Penelitian ini bertujuan untuk mengetahiu kinerja Membran Reverse Osmosis (RO) tipe Silvertec ULP-2021-100 dalam mengolah dua jenis air baku, yaitu air PDAM dan air Sukomoro, menjadi air minum sesuai standar kualitas menurut Permenkes No. 2 Tahun 2023. Proses pengolahan diawali dengan pra-filtrasi menggunakan filter sediment dan karbon aktif, dilanjutkan dengan filtrasi utama menggunakan membran RO berukuran pori 0,0001 mikron, serta sterilisasi akhir dengan sinar ultraviolet. Variasi tekanan fluida antara 3–7 bar diuji untuk menentukan tekanan optimal yang menghasilkan kualitas air terbaik berdasarkan parameter pH, Total Dissolved Solids (TDS), dan laju alir. Penelitian ini mendapati bahwa tekanan optimal berada pada 5 bar, di mana air PDAM memiliki pH 7,4, TDS 18 mg/L, dengan laju alir mencapai 10,3171 L/jam, sedangkan air Sukomoro memiliki pH serupa 7,4, TDS 18 mg/L, dengan laju alir sebesar 9,5952 L/jam. Uji parameter kimia pada tekanan ini mengindikasikan bahwa kadar besi (Fe²⁺), klorida (Cl⁻), dan sulfat (SO₄²⁻) tetap di bawah batas standar. Sementara itu, pengujian mikrobiologi menghasilkan hasil negatif untuk total coliform dan E. coli setelah penanganan dengan sinar UV. Secara keseluruhan, sistem RO ini telah terbukti efektif serta efisien dalam menghasilkan air minum berkualitas, dengan tekanan 5 bar sebagai kondisi operasi optimal untuk kedua jenis air sumber yang digunakan
Thermal Behavior of a Rocket-Type Biomass Burner Under Varying Fuel Feed Rates and Combustion Air Velocity Indah Pratiwi Indah; Erlinawati; Tahdid; Bimo Pamungkas; Tria Apriyanti
ALKIMIA Vol 10 No 2 (2026): ALKIMIA (IN PRESS)
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/1tqxc363

Abstract

This study investigated the thermal behavior of a rocket-type biomass burner fueled with wood pellets under varying fuel feed rates and combustion air velocities. The objective was to evaluate the effect of the fuel feed rate and the combustion air velocity on flame temperature, thermal efficiency, and carbon monoxide (CO) emissions. The experiments were conducted on a burner equipped with an automatic screw feeder at fuel feed rates of 5, 7, and 9 kg/hour and combustion air velocities of 6, 8, 10, 12, and 14 m/s. The results showed that increasing the air velocity up to 10 m/s improved combustion performance, as indicated by higher flame temperatures and thermal efficiency together with lower CO emissions. The optimum operating condition was obtained at a fuel feed rate of 9 kg/hour and an air velocity of 10 m/s, which produced the highest flame temperature of 1189,00°C and the highest thermal efficiency of 74,14%. At air velocities above 10 m/s, both the flame temperature and the thermal efficiency decreased owing to the thermal dilution effect of excess air. Among the tested feed rates, 9 kg/hour consistently produced the highest flame temperature and thermal efficiency, followed by 7 kg/hour and 5 kg/hour, whereas the lowest CO concentration of 1,43 ppm was recorded at a feed rate of 7 kg/hour and an air velocity of 14 m/s. These findings highlight the importance of matching the fuel feed rate to the combustion air supply in order to enhance thermal performance and reduce emissions in rocket-type biomass burner systems
Pengaruh Tekanan Fluida Terhadap Unit Pengolahan Air Minum Menggunakan Membran Reverse Osmosis, Post Carbon dan Bio Ceramic Yuniar Lia; Yuniar; Erwana Dewi; Tahdid
Jurnal Serambi Engineering Vol. 11 No. 2 (2026): April 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v11i2.1702

Abstract

Air Minum Isi Ulang (AMIU) banyak dipilih sebagai alternatif yang lebih ekonomis dibandingkan Air Minum Kemasan (AMDK). Namun, kualitasnya sering dipertanyakan karena tidak semua stasiun isi ulang memenuhi standar kesehatan yang ditetapkan oleh Peraturan Menteri Kesehatan No. 492/Menkes/Per/IV/2010. Penelitian ini bertujuan untuk menganalisis pengaruh variasi tekanan fluida (3–7 bar) pada unit pengolahan air minum menggunakan Reverse Osmosis (RO) Silvertec ULP 2012-100, dikombinasikan dengan Post Carbon dan Bio Ceramic, dengan air PDAM sebagai bahan baku. Teknologi RO mampu menyaring kontaminan pada tingkat molekuler, sedangkan Post Carbon meningkatkan rasa air dan Bio Ceramic membantu memecah molekul agar lebih mudah diserap oleh tubuh. Penelitian ini dilakukan secara eksperimental di Laboratorium Teknik Energi Politeknik Negeri Sriwijaya dengan mengukur parameter fisik (pH, TDS) dan kimia (Fe, Mn, Cl). Hasil penelitian menunjukkan bahwa variasi tekanan mempengaruhi kualitas air, dengan 5 bar diidentifikasi sebagai kondisi optimum. Pada tekanan ini, air yang diolah memenuhi semua standar kualitas air minum sehingga sistem ini menjadi solusi yang efektif.
Co-Authors Bimo Pamungkas Erika Dwi Oktaviani Erlinawati Erwana Dewi Fatria Indah Pratiwi Indah K.A. Ridwan Meysin Salisa Fikamalati Tria Apriyanti Yuniar Yuniar Lia Zenia Zal Putri