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Muhammad Zulfikar Luthfi
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ANALYSIS OF AMMONIA ASSIMILATION KINETICS AND DETERMINATION OF SUBSTRATE INHIBITION CONDITIONS IN VARIATIONS OF MOLASSES DOSE IN A BATCH REACTOR SYSTEM Muhammad Iqbal Putra; Rizky Ibnufaatih Arvianto; Suhirman Suhirman; Adna Ivan Ardian; Denanda Clarasati Puteri; Dennis Farina Nury; Muhammad Zulfikar Luthfi; Maghfira Arum Lestari
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.
Co-Authors Abdul Halim Adelia, Putri Jesika Adna Ivan Ardian Adna Ivan Ardian Adna Ivan Ardian Ahmad Rifqiyan Farohi Aini, Apsari Puspita Aldi Dwi Ramadhan Alfira Putri Damayanti Amelia Naomi Agustina Andi Hardiansyah Andri Saputra Apsari Puspita Aini Arum, Amalia Sekar Arvianto, Rizky Ibnufaatih Auriyani, Wika Atro Betariani, Khairunisa Chalista Balqis Aurellia Choerudin, Choerudin Damayanti, Alfira Putri Denanda Clarasati Puteri Denanda Clarasati Puteri Dennis Farina Nury Dennis Farina Nury Dennis Farina Nury Dennis Nury Deviany Deviany, Deviany Didik Supriyadi, Didik Eko Supriadi Endrigo Chrystover Enny Nurmalasari Farohi , Ahmad Rifqiyan Febriyanto, Pramahadi Feerzet Achmad Ferry Ikhsandy Firman Ayub Fitriyani, Vira Hafidz Naufal Harmiwati N. H Hasnah Ulia Hendri Kurniawan Hibrah Hibrah Hibrah, Hibrah Ihsan Wiratama Ihsan Wiratama Jabosar Ronggur Hamonangan Panjaitan Janah, Dikri Uzlifah Jerry Jerry Jerry Jerry Jerry Jerry Jerry, Jerry Khairati, Miftahul Kurniawati, Intan Wahyuning Maghfira Arum Lestari Manurung, Martin Sugiarto Maulana, Akmal Mayastuti, Sherina Mega Tiara Miftahul Khairati Miftahurrahmah Miftahurrahmah, Miftahurrahmah Misbahul Huda Monita Pasaribu Monita Pasaribu Muhamad Iqbal Putra Muhamad Iqbal Putra Muhamad Iqbal Putra Muhammad Iqbal Putra Muhammad Nasyarudin Iqbal Muhammad Nasyarudin Iqbal, Muhammad Nasyarudin N. H. , Harmiwati N. H., Harmiwati N.H, Harmiwati Nainggolan, Denny Hendrik Nasyarudin Iqbal, Muhammad Nayaka Sandi Prayoga Ningrum, Khofifah Anggitiya Nugroho , Muhammad Erwin Cahyo Nugroho, Muhammad Erwin Cahyo Nurul Ulfa Safitri Nury , Dennis Farina Nury, Dennis Oktria, Dandi Oldy Fahlovi Permadani, Resi Levi Puji Rahayu Puteri, Denanda Clarasati Putra, Muhammad Iqbal Putra, Renold Ramadhan Ramadhan, Aldi Dwi Renold Ramadhan Putra Rifqi Sufra Rizky Ibnufaatih Arvianto Rizky Ibnufaatih Arvianto RR. Ella Evrita Hestiandari Setiadi, Tjandra Siti Aisyah Rahimah Aulia Siti Zullaikah Suhirman SUHIRMAN SUHIRMAN Suhirman Suhirman Suhirman Suhirman Surya, Dhanu Fransgio Pratama Sutri, Reni Tri Widjaja Tulusma Basana Simaremare Tutuka, Rachmadi Ulia, Hasnah Variyana, Yeni Wiratama, Ihsan Yahya , Agung Kurnia Yahya, Agung Kurnia Yohanes Tri Handoko Zulkipli, Rohiman Ahmad