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All Journal Jurnal Rekayasa Proses Jurnal Sains dan Seni ITS World Chemical Engineering Journal JURNAL INTEGRASI PROSES Konversi Jurnal Chemurgy Jurnal Rekayasa Proses Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Jurnal Tekno Insentif Jurnal Abdi Masyarakat (JAM) Jurnal Teknik Industri Terintegrasi (JUTIN) Equilibrium Journal of Chemical Engineering Jurnal Riset Teknologi Pencegahan Pencemaran Industri REACTOR : Journal of Research On Chemistry And Engineering Warta Perkaretan Jurnal Teknologi Kimia Unimal Jurnal Ilmiah Berkala Sains dan Terapan Kimia CHEMTAG Journal of Chemical Engineering Journal of Industrial Community Empowerment SAINTI: Majalah Ilmiah Teknologi Industri Jurnal Teknologi Kimia Mineral Journal of Energy, Materials, & Manufacturing Technology Majalah Teknik Industri Jurna Beta Kimia Communication in Food Science and Technology Maximus: Journal of Biological and Life Sciences Journal Of Chemical Process Engineering Jurnal Polimesin Jurnal Rekayasa Proses PATRIOTIK: Jurnal Inovasi dan Pemberdayaan Masyarakat
Dennis Farina Nury
Politeknik Industri Petrokimia Banten
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Kinetics of Ammonia Biodegradation Using EM4 with Palm Sugar as an External Carbon Source Puteri, Denanda Clarasati; Arvianto, Rizky Ibnufaatih; Suhirman, Suhirman; Ardian, Adna Ivan; Putra, Muhamad Iqbal; Luthfi, Muhammad Zulfikar; Wiratama, Ihsan; Jerry, Jerry; Nury, Dennis Farina
Jurnal Beta Kimia Vol 6 No 1 (2026): Volume 6 Issue 1, May 2026
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v6i1.27517

Abstract

Biological treatment of ammonia requires sufficient carbon availability to maintain stable microbial activity and sustain optimal degradation rates. This study evaluates the kinetics of ammonia biodegradation using an EM4 microbial consortium supplemented with palm sugar as an external carbon source in aerobic batch reactors. Initial ammonia concentrations of 10, 30, and 50 ppm were evaluated over six days of operation. Monitored parameters included ammonia concentration, pH, and biomass (MLSS), while kinetic evaluation applied a pseudo–first‑order model via the ln(St/S0)–time relationship. The results showed removal efficiencies of 79.0–83.4%, accompanied by MLSS increases from ~2,000 to ~4,600 mg/L with higher initial concentrations. The pH range of 5.8–8.5 remained conducive to microbial activity. The ln(St/S0) curves exhibited strong linearity, confirming the suitability of the pseudo–first‑order model, and the reaction rate constants increased under higher substrate and biomass conditions. These findings indicate that palm sugar is effective as an external carbon source for sustaining process stability and accelerating ammonia removal. The integration of EM4 with a natural carbon source demonstrates potential as an efficient, economical, and readily implementable biological approach for ammonia treatment in wastewater.
Performance Evaluation of Bentonite–Nano SiO₂ as an Adsorbent in the Decolorization Process of Rhodamine B Regna Tri Jayanti; Miftahul Khairati; Enny Nurmalasari; Puji Rahayu; Dennis Farina Nury; Okti Ulandari; Andhini Putri Trianita
Jurnal Sains dan Terapan Kimia Vol 20, No 1 (2026)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v20i1.24444

Abstract

Among various sources of industrial water pollution, effluents from printing, dyeing, and textile processes represent one of the most significant environmental threats. These wastewaters contain numerous toxic and hazardous substances that are difficult to biodegrade. This study investigates the synthesis, characterization, and adsorption performance of a Bentonite–Nano SiO₂ composite for the removal of Rhodamine B dye from aqueous solutions. The research was conducted in two main stages: the preparation of the Bentonite–Nano SiO₂ composite and the evaluation of its adsorption performance at various adsorbent concentrations and contact times. The composite was synthesized by dispersing nano-silica (15% w/w) into bentonite using ethanol as the solvent, followed by stirring, filtration, and drying processes. Characterization using Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) confirmed successful modification. Adsorption tests showed that Rhodamine B removal efficiency increased with higher adsorbent concentration, reaching optimal conditions at 0.75% (w/v) with a removal efficiency of 90.2% after a contact time of 10–15 minutes. The enhanced adsorption performance was attributed to the larger surface area, higher porosity, and increased number of active sites resulting from the incorporation of nano-silica
ANALYSIS OF AMMONIA ASSIMILATION KINETICS AND DETERMINATION OF SUBSTRATE INHIBITION CONDITIONS IN VARIATIONS OF MOLASSES DOSE IN A BATCH REACTOR SYSTEM Putra, Muhammad Iqbal; Arvianto, Rizky Ibnufaatih; Suhirman, Suhirman; Ardian, Adna Ivan; Puteri, Denanda Clarasati; Nury, Dennis Farina; Luthfi, Muhammad Zulfikar; Lestari, Maghfira Arum
Equilibrium Journal of Chemical Engineering Vol 10, No 1 (2026): Volume 10, No 1 July 2026 (First Online)
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v10i1.115734

Abstract

The purpose of this study is to find the inhibitory phenomena caused by an excessive organic load and to estimate the ideal molasses dosage for ammonia assimilation by Saccharomyces spt. The experiment was carried out utilizing a batch reactor system with different molasses doses of 0, 5, 10, 15, and 20 mL at a constant starting ammonia content of 50 mg/L. Ammonia assimilation followed a pseudo-first-order model with a significant coefficient of determination R2 > 0.90 in the active dose range, according to the kinetic studies. The results confirmed that a dose of 10 mL was the optimum condition, producing the highest reaction rate constant (k) of 0.5107 day-1 and an ammonia reduction efficiency of 93.58%. On the other hand, raising dosage 20 mL caused a substrate inhibition phenomenon, which was marked by a drop in the k value to 0.2268 day-1 and a low ammonia reduction efficiency of 58.42% because of the initial acidification. The ammonia removal rate and biomass concentration (MLSS) had a very strong positive linear connection (r=0.98) according to Pearson correlation analysis, indicating that nitrogen assimilation with biomass growth-rather than physical volatilization-is the primary mechanism of removal. In order to optimize ammonia absorption performance without causing environmental toxicity, this study suggests a dose of 10 mL.
Analysis Of Recent Research In Solketal Synthesis Toward Circular Economy : A Review Ardian, Adna Ivan; Trisnantari, Tamaratritania Citta; Nury, Dennis Farina; Arvianto, Rizky Ibnufaatih; Suhirman, Suhirman
Equilibrium Journal of Chemical Engineering Vol 10, No 1 (2026): Volume 10, No 1 July 2026 (First Online)
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v10i1.113030

Abstract

Indonesia’s growing biodiesel production has caused a large surplus of crude glycerol, which becomes both an economic and environmental problem. The study present a systematic chemical engineering perspective on how glycerol can be transformed into solketal, a compound that can act as a biofuel additive and green solvent. The discussion is based on a systematic reading method of twelve research papers published between 2018 and 2024, specifically discuss the development of catalysts related to this process. The contrasting performance between catalyst efficiency and its industrial implementation become a concern. It shows Zeolites and MOF catalyst exceed other types of catalysts by using process intensification in laboratory. But in contrast, their stability lower when associated with impurities found in feedstock, followed by heat-related problems. On the other side, simple and cheaper catalysts such as acid-treated clays still show steady activity even in less clean feedstocks, making them more realistic for larger scale operation. The review also points out that improving catalyst lifetime and using new process approaches like microwave heating are important to make the process more economical. Overall, this study suggests that creating catalysts which can resist impurities together with better process design is necessary to make glycerol utilization more sustainable and in line with Indonesia’s circular economy plan.
Co-Authors AA Sudharmawan, AA Adelia, Putri Jesika Agnesia Putri Rini Agustian, Mertza Fitra Agustina, Amelia Naomi Ahmad Rifqiyan Farohi Akhmad Zainal Abidin Akhmad Zainal Abidin, Akhmad Zainal Aldillah Herlambang Andhini Putri Trianita Andri Saputra Ardian, Adna Ivan Arum, Amalia Sekar Arvianto, Rizky Ibnufaatih Auriyani, Wika Atro Aziz, Arizal Abdul Betariani, Khairunisa Choerudin, Choerudin Chrystover, Endrigo Damayanti Damayanti Damayanti, Alfira Putri Deviany Deviany Deviany, Deviany Enny Nurmalasari Fahlovi, Oldy Fahni, Yunita Febriyanto, Pramahadi Feerzet Achmad Ferry Ikhsandy Fitriyani, Vira Fredy Kurniawan Handik Hendratama Handoko, Yohanes Tri Hendra Setyawan Hidayah , Rahmat Taufik Hutabarat, Fransisco Xala Hutabarat, Monalisa Ismi, Lisa Anggraini Jabosar Ronggur Hamonangan Panjaitan Janah, Dikri Uzlifah Jerry, Jerry Kurniawati, Intan Wahyuning Lestari, Maghfira Arum Lisa Anggraini Ismi Manurung, Martin Sugiarto Maulana, Akmal Mayastuti, Sherina Melani Putri Miftahul Khairati Miftahurrahmah Miftahurrahmah, Miftahurrahmah Monita Pasaribu Muhammad Fajri Muhammad Luthfi Muhammad Nasyarudin Iqbal, Muhammad Nasyarudin Muhammad Zulfikar Luthfi Mustafa , Mustafa Mustafa Mustafa Nainggolan, Denny Hendrik Napitupulu, Lukas Fernando Naufal, Hafidz Naulina, Rosada Yulianti Ningrum, Khofifah Anggitiya Nugroho , Muhammad Erwin Cahyo Nugroho, Muhammad Erwin Cahyo Oktavianto, Putra Okti Ulandari Prahmana, Rico Aditia Pramahadi Febriyanto Puji Rahayu Puji Rahayu Puteri, Denanda Clarasati Putra, Muhamad Iqbal Putra, Muhammad Iqbal Rahmat Taufik Hidayah Regna Tri Jayanti Reni Yuniarti Ritonga, Jhordan Safitri, Nurul Ulfa Saputra, Danang Cahya Eka Saragih, Juro Dufan Sarifudin, Alfan Satria , Arysca Wisnu Satria, Arysca Wisnu Setiadi, Tjandra Simanjuntak, Tiurmaida Gebryela Siti Zullaikah Suharto Suharto Suharto Suharto Suhartono Suhartono Suhartono SUHIRMAN SUHIRMAN Sutri, Reni Tampubolon, Yosi Anugrah S.M Tri Widjaja Trisnantari, Tamaratritania Citta Tutuka, Rachmadi Variyana, Yeni Windiastuti, Septiyana Wiratama, Ihsan Yunita Fahni Zulkipli, Rohiman Ahmad Zullaikah, Siti