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All Journal Jurnal Teknik Kimia USU Indonesian Journal of Chemistry Jurnal Abdimas Madani dan Lestari (JAMALI) ASEAN Journal of Chemical Engineering Jurnal Teknik Kimia USU

Taslim

Departemen Teknik Kimia, Fakultas Teknik Universitas Sumatera Utara

Author-ID : 4065419

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Other

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PENGHILANGAN TINTA PADA KERTAS THERMAL BEKAS : PENGARUH KONSISTENSI DAN KONSENTRASI PENDISPERSI FLOTASI Sulastri Dewanti; Elisabet Aprilyanti; Taslim
Jurnal Teknik Kimia USU Vol. 3 No. 4 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Recycling of wastepaper is a solution for paper industry to overcome the scarcity and the limited presence of the virgin pulp sources. Thermal paper is a highly engineered product coated with a thermal sensitive layer that reacts in the presence of heat to create the printed image. The purpose of this research is to study the effect of pulp consistency and dispersant concentration on the removal of ink in the thermal paper. There are 3 steps in this research which are immersing, pulping and flotation. The results of this research were measured according to TAPPI and SNI to determine the brightness and tensile strength of the recycled paper, respectively. The excellent conditions were obtained at pulp consistency of 0.8%, dispersant concentration of 1.5%, flotation temperature of 50 °C and flotation time of 40 minutes. In these conditions, the brightness was 72,17% and tensile strength was 3.7 kN/m.

Gas Holdup and Gas-Liquid Mass Transfer Investigations in an Oscillatory Flow in a Baffled Column Taslim Taslim; Mohd Sobri Takriff
ASEAN Journal of Chemical Engineering Vol 2, No 1 (2002)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Gas holdup and gas-liquid mass transfer were investigated in a vertical baffled column. Pure carbon dioxide (C02) was used as the dispersed phase and tap water was used as the continuous phase. Gas holdup and mass transfer rate of C02 were measured under semi-batch condition, while the liquid phase was measured in batch mode. Gas holdup was estimated as the volume fraction of the gas in the two-phase mixture in the column. Mass transfer was expressed in terms of the liquid-side volumetric mass transfer coefficient (kLa). The effects of oscillation frequency, oscillation amplitude and gas flow rate on gas holdup andmass transfer were also determined. The results showed that a significant increase in gas holdup and mass transfer could be achieved in an oscillatory baffled column compared to a bubble column. Gas holdup and mass transfer were correlated as a function of power density and superficial gas velocity. Keywords: gas holdup, mass transfer coefficient, power density, superficial gas velocity

Oscillatory Flow Mixer for Pulp Bleaching Taslim Taslim; Mohd Sabri Takriff
ASEAN Journal of Chemical Engineering Vol 2, No 1 (2002)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

This paper reports the results of an investigation on the use of oscillatory baffled column as a mixer for pulp bleaching. Unbleached hardwood kraft pulp was bleached using hydrogen peroxide. Variables studied were oscillation frequency, oscillation amplitude, and pulp consistency. The mixing process was achieved by oscillating pulp suspension in a periodically baffled column at a certain frequency and amplitude. The mixing quality of pulp bleaching was quantified using mixing index. The results showed that mixing quality improved with oscillation frequency and amplitude, but decreased with pulp consistency. This typical device is very promising as a mixer for pulp bleaching.

Gas-LiquidMassTransferin Continuous Oscillatory Flow BaaledColumnina Taslim Taslim; Mahd. Sabri Takriff
ASEAN Journal of Chemical Engineering Vol 4, No 2 (2004)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Gas-liquid mass transfer in continuous oscillatory flow was conducted in a vertical baffled column. Pure carbon dioxide (C02) was used as the dispersed phase and tap water was used as the continuous phase. The mass transfer rate of C02 measured under continuous operation was expressed in terms of the liquid-side volumetric mass transfer coefficient (kLa) and was calculated using a stationary method. The effects of oscillation frequency, oscillation amplitude, and flow rates on mass transfer were also determined. The results showed that a significant increase in mass transfer could be achieved in oscillatory flow in a baffled column comp.:lfed to that in a bubble column. The mass transfer in continuous oscillatory flow in a baffled column was not affected by the liquid flow rate in the range tested. Then, kLQwas correlated as a function of power density and superficial gas velocity.

Penentuan Kadar Flavonoid dan Kandungan Fitokimia Ekstrak Kulit Bawang Merah (Allium cepa L) dengan Berbantukan Microwave sebagai Potensi Bahan Aktif Tabir Surya Dalimunthe, Nisaul Fadilah; M. Thoriq Al Fath; Taslim; S. Ginting, M. Hendra; Farah Nurul Alifia; Berta, Grace Adela
Jurnal Teknik Kimia USU Vol. 13 No. 2 (2024): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v13i2.16318

The skin serves as a protective barrier against dust and ultraviolet (UV) radiation. Excessive UV exposure is associated with accelerated skin aging, erythema, hyperpigmentation, and carcinogenesis. This study aimed to quantify flavonoid concentrations and characterize phytochemical constituents in shallot skin extracts for their potential as active ingredients in sunscreen formulations. Shallot skin was subjected to microwave assisted extraction using 70% ethanol as the solvent. Phytochemical screening revealed the presence of flavonoids, tannins, saponins, and alkaloids in the extract. Flavonoid content was determined via UV-Vis spectrophotometry, yielding 36.33 mgQE/g. The high flavonoid concentration observed in shallot skin extract suggests its potential efficacy as an active ingredient in sunscreen formulations.

Pembuatan Bahan Bakar Alternatif Dari Sampah Sayuran Hasil Pertanian Menggunakan Alat Distilator di Desa Sampajaya, Kecamatan Berastagi, Kabupaten Karo: Indonesia Sidabutar, Rivaldi; Trisakti, Bambang; Irvan, Irvan; Al Fath, Muhammad Thoriq; Ginting, Muhammad Hendra Sahputra; Hanum, Farida; Taslim, Taslim; Sitepu, Rafael Aginta; Alamsyah, Vandria; Rasyid, Nashfin Nazli; Sinabang, Juwita Lestari
Jurnal Abdimas Madani dan Lestari (JAMALI) Volume 07, Issue 01, Maret 2025
Publisher : UII

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/jamali.vol7.iss1.art19

Unsold vegetable waste from agricultural produce often rots and ends up being discarded at landfills, increasing waste volume and potentially causing environmental problems. To address this issue, vegetable waste can be processed into useful and marketable products such as bioethanol. Bioethanol is a renewable energy source obtained through the fermentation of biomass, including vegetable waste such as potatoes, tomatoes, carrots, mustard greens, and cabbage. In this community service program, an e-Bio production unit with a processing capacity of 5 liters has been designed, utilizing vegetable waste as raw material. The unit consists of pre-treatment equipment, a fermenter, and a distillation unit. The pre-treatment equipment includes an initial cooking tank, a crusher, and a pressurized tank. The fermenter tank is equipped with two manual paddle-type agitators with a diameter of 30 cm. Meanwhile, the distillation tank is made of stainless steel and equipped with a heater to heat the fermented solution and a cooling water tank to cool the evaporated e-Bio. The unit achieves a distillation efficiency of 95% with a production rate of 0.475 L/hour, producing 0.95 liters of ethanol after two hours of operation. The goal of this program is to implement the e-Bio production unit by utilizing vegetable waste as raw material, increase community or farmer income through e-Bio sales, and reduce the environmental impact caused by vegetable waste disposal.

Inovasi Edible Coating Buah Mangga Berbasis Kitosan Kulit Udang dengan Aditif Ekstrak Daun Asam Jawa sebagai Antimikroba Pratama, Deska Rizki; Berutu, Aidha Sekar; Husin, Fahrizal; Panjaitan, Maychel Yohana; Taslim
Jurnal Teknik Kimia USU Vol. 14 No. 1 (2025): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v14i1.19093

Edible coating is a thin layer that can be consumed which protects the surface of the fruit from environmental influences. This study evaluates the effectiveness of shrimp shell chitosan-based edible coating with tamarind leaf extract as an antimicrobial, along with glycerol and tween 80, in preserving mango quality during 15 days of storage. The variables evaluated were the concentration of tamarind leaf extract (0.5, 1.0, and 1.5%) and mango storage duration (0, 3, 6, 9, 12, and 15 days). While the amount of chitosan used was constant. The parameters measured included total microbial count, weight loss, fruit skin color, total soluble solids, titratable acidity, and vitamin C content. The results showed that the combination of shrimp shell chitosan and tamarind leaf extract as an antimicrobial significantly reduced the degradation of mango quality, with the 0.5% concentration of tamarind leaf extract being the most effective in maintaining quality and extending shelf life of mango until 15 days.

Co-Authors Al Fath, Muhammad Thoriq Alamsyah, Vandria Alwi Gery Agustan Siregar Arya Josua S Bambang Trisakti Berta, Grace Adela Berutu, Aidha Sekar Cici Novita Sari Cindy Carnella Dalimunthe, Nisaul Fadilah Dian Halimah Batubara Elisabet Aprilyanti Farah Nurul Alifia Farida Hanum Husin, Fahrizal Iriany Irvan Irvan Johan Senjaya M. Thoriq Al Fath Mahd. Sabri Takriff Meilia Meta Rivani Mohd Sabri Takriff Mohd Sobri Takriff Muhammad Hendra S Ginting Muhammad Rizky Agung Nike Taruna Okta Bani Panjaitan, Maychel Yohana Pascalis Novalina Pratama, Deska Rizki Putri Retno Wahyu Ningsih Ranggita Dwi Nindya Affandi Rasyid, Nashfin Nazli Renita Manurung Seri Maulina Sidabutar, Rivaldi Sigit Purwanto Sinabang, Juwita Lestari Sitepu, Rafael Aginta Sri Zahrani Dwi Mauliyah Parinduri Sulastri Dewanti Tjahjono Herawan Toni Rizki Aruan Valentinoh Cuaca Wendi William

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