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All Journal Jurnal Sains Materi Indonesia Hayyan Journal
Sinuhaji, Tubagus Rayyan Fitra
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology

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A Design of "SWAFT" Technology for Separation of Fe, Pb, and Cu Metal Waste in Deli River Water Medan (Based on Coagulation-Adsorption Using Activated Carbon from Rice Husks and Aloe Vera Coagulant) Sinuhaji, Tubagus Rayyan Fitra; Purba, Darly Guntur Darris; Sirait, Hormat Gunawan; Ginting, Setia Rifai Matuanta; Nainggolan, Robby Samuel Meligust; Siahaan, Bungaran Immanuel
Hayyan Journal Vol. 1 No. 1 (2024): February
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/hayyan.v1i1.1197

Abstract

The increase in population has influenced the rising demand for water, and one way to meet this demand is by utilizing river water. Deli River is one of the rivers that flows through the city of Medan. The development of industries and settlements along the Deli River has affected its water quality due to heavy metal waste, specifically Fe, Pb, and Cu. This is evident from the deterioration of water quality characterized by changes in color and odor. One solution to address this issue is by using rice husk activated carbon as an adsorbent and aloe vera as a biocoagulant. Rice husk contains cellulose which can be converted into carbon and has a carbon content of 48.9%, while aloe vera contains mucilage which is an active coagulant used for water clarification. The principle used in this product is coagulation, which involves mixing chemicals, such as coagulants, with Deli River water followed by the adsorption process, where metal particles accumulate on the surface of the adsorbent. The results obtained showed a decrease in the parameters of Fe, Pb, and Cu metal content successively by 0.0092 mg/liter; 0.0081 mg/liter, and 0.0072 mg/liter. Thus, the filtered water meets the clean water quality standards set by Government Regulation No. 82 of 2001. Based on the existing problems and potentials, this product becomes a smart solution to assist the community, especially those in riverside areas, in water treatment and also addresses the challenges in preparing human resources that are actualized in facing the era 5.0 revolution.
Energy Analysis and Economy Performance of a Hybrid Solar Dryer for Drying Coffee Suherman, Suherman; Hadiyanto, Hadiyanto; Franz, Nicholas; Kamandjaja, Vimala; Sinuhaji, Tubagus Rayyan Fitra
Jurnal Sains Materi Indonesia Vol. 26 No. 1 (2024): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2024.3135

Abstract

This work studies the effect of the drying temperature on the profile of the water content, drying rate, drying efficiency, economic performance, and the quality of Robusta and Arabica coffee beans using the hybrid solar dryer. The drying instrument with the help of LPG heating is used in this research with a specified temperature of 40 ℃, 50 ℃, and 60 ℃. The research is conducted on a sunny day for 1 day for each temperature and coffee beans. The temperature profile shows that the lowest water content in the study is 60 ℃. The drying rate for both 50 ℃ and 60 ℃ are similar and the highest average efficiency of the instrument is at 50 ℃ for both Robusta and Arabica beans. The dominant peak in GCMS analysis result of coffee samples was caffeine with a total area percentage of 30.89%, the description of the coffee bean structure using SEM test resulted in a hole size of 5-10 µm, the obtained fat content was 1.6%, the obtained protein content 17.3%. A hybrid solar dryer is an environmentally friendly solution that enables faster coffee drying, with a payback period of 1.5 years for both coffee bean types.
Co-Authors Franz, Nicholas Ginting, Setia Rifai Matuanta Hadiyanto Hadiyanto Kamandjaja, Vimala Nainggolan, Robby Samuel Meligust Purba, Darly Guntur Darris Siahaan, Bungaran Immanuel Sirait, Hormat Gunawan Suherman, Suherman