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Muhamad Maulana Azimatun Nur
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Eksergi: Chemical Engineering Journal
Published by Universitas Pembangunan Nasional Veteran Yogyakarta
ISSN : 1410394X     EISSN : 24608203     DOI : https://doi.org/10.31315
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
Eksergi is an open-access, peer-reviewed scientific journal that focuses on research and innovation in the fields of energy and renewable energy. The journal aims to provide a platform for scientists, researchers, engineers, and practitioners to share knowledge and advancements that contribute to sustainable development and energy transition. In addition to energy topics, the journal also accepts high-quality manuscripts related to, but not limited to, the following areas: Separation processes Bioprocesses related to food, energy, and environmental applications Wastewater treatment and resource recovery Process optimization and intensification Carbon capture, utilization, and storage (CCUS) Chemical reaction engineering and reactor design Life cycle assessment (LCA) and sustainability evaluation Process Design and Control Engineering Process Simulations Process System Engineering The journal welcomes original research articles, reviews, and short communications that demonstrate novelty, scientific rigor, and relevance to chemical engineering and interdisciplinary applications.
Arjuna Subject : Energi (semua kategori) - Energi Terbarukan, Keberlanjutan dan Lingkungan
Articles 12 Documents
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Search results for , issue "Vol 19, No 3 (2022)" : 12 Documents clear
Leaching SiO₂ On Coal Fly Ash As Ammonium Adsorbent In Tofu Liquid Waste Using Hydrothermal Method Danang Jaya; Anisa Anisa; Dian Prasetyani Basuki; Tunjung Wahyu Widayati
Eksergi Vol 19, No 3 (2022)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v19i3.8204

Abstract

Soybean is one of the main food commodities in Indonesia. One of the soybean processing that is often consumed is tofu. Inappropriate treatment of tofu liquid waste is very dangerous for life. It is noted that the ammonia content in tofu liquid waste is 23.3-23.5 mg/l which can cause odors that disturb the residents' comfort. One alternative solution for purifying tofu liquid waste is to carry out an adsorption process using coal fly ash. Fly ash contains metal oxides in the form of SiO₂, Al₂O₃, Fe₂O₃, CaO, MgO, K₂O, and Na₂O. The content of SiO₂ as much as 60-70% in it causes fly ash to be very potential to absorb ammonia levels. Extraction of SiO₂ using the sol gel method was carried out using fly ash that had gone through a hydrothermal process. The hydrothermal process is a crystallisation technique in a closed container with high temperature and pressure. After going through the extraction stage, the ongoing process was continued with the washing stage to produce silica powder to adsorb ammonium. The mass required for silica to achieve the optimum ammonia concentration adsorption efficiency is 0.25 gram/20 ml of tofu liquid waste. Meanwhile, the contact time required for silica to achieve the optimum adsorption efficiency of ammonium content is 30 minutes. It was noted that the silica from the optimised fly ash processing had a better quality than the unoptimized silica or commercial silica.
Utilization of Papaya Seed Powder as a Bioadsorben to Reduce Total Iron (Fe) in Wastewater Munira Munira; Andi Aladin; Perwitasari Perwitasari; Nur Aulia Hamza; St Umrah Tulzhaliza
Eksergi Vol 19, No 3 (2022)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v19i3.8007

Abstract

Papaya is a tropical plant that is widely cultivated in Indonesia. Papaya seeds have a high cellulose content, so that papaya seeds can be used as raw material for adsorbents (biosorbents). Biosorbent is used to reduce environmental pollution through the absorption of various types of liquid waste including heavy metals. Fe is an essential heavy metal if in excess amounts can cause toxic effects. One of the methodes to reduce  of iron ion in wastewater is  the adsorption method is using papaya seed biosorbents. The aim of study was to determine the effectivness of using papaya seedd as bioadsorbent  to reduce of iron ion in the wastewater. Papaya seed as the adsorbent agent activated ones was used in five particle size and contact time variations in order to determine the optimum particle size and contact time of papaya seed powder to absorb the heavy metals. The results show that the optimum adsorbent particle size was 100 mesh and the optimum contact time was 60 minute. The adsorption efficiency of (Fe) metal ions in wastewater was 60%, the adsorption capacity value was 0.365 mg/g.  Kinetic modelling of adsorption process is  pseudo second order.

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