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All Journal Jurnal Ecocentrism Jurnal Ilmiah Teknik Unmas (Jitumas) Denpasar
Dewa Agung Dibyacitta
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering Environmental Science Transportation

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ANALISIS KARAKTERISTIK FILTRASI DAN EFISIENSI ADSORPSI AMONIUM PADA SISTEM FILTER BIOCHAR TERAKTIVASI Mg2+ Dewa Agung Dibyacitta; Yudha Pratama, I Gede; I Made Wahyu Wijaya
Jurnal Ecocentrism Vol. 6 No. 1 (2026): Jurnal Ecocentrism
Publisher : Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Mahasaraswati Denpasar, Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36733/jeco.v6i1.13816

Abstract

The increasing concentration of ammonium (NH4+) in domestic wastewater contributes to eutrophication, depletion of dissolved oxygen, and disruption of aquatic ecosystem balance. Continuous treatment systems often face operational stability challenges due to fluctuations in flow rate and pollutant loading, thereby requiring filtration technologies that are both effective and hydraulically stable. This study aimed to analyze the filtration characteristics and ammonium adsorption efficiency of an upflow Mg2+-activated biochar filter system arranged in four serial compartments. Wood-based biochar was chemically modified using a 4.2 g/L MgCl2.6H2O solution for 70 minutes. The system was operated continuously for six days at a constant flow rate of 100 mL/min using domestic wastewater with ammonium concentrations ranging from 27.74 to 42.73 mg/L. The results showed a head loss of 0.0267 m per compartment and a total of 0.1068 m, indicating stable hydraulic conditions without significant clogging. The average hydraulic retention time (HRT) was 1.79 hours per compartment (9.78 hours total), providing adequate contact time for adsorption. Ammonium adsorption efficiency reached 94.28–96.53% and increased progressively across the compartments. It can be concluded that the Mg2+-activated biochar filter system demonstrated favorable hydraulic performance and high ammonium adsorption efficiency under continuous operation.
EFEKTIVITAS FILTER BIOCHAR TERAKTIVASI Mg²⁺ DALAM PENYISIHAN AMONIUM DARI AIR LIMBAH DOMESTIK Dewa Agung Dibyacitta; Wijaya, I Made Wahyu; I Gusti Ngurah Made Wiratama
Jurnal Ilmiah Teknik Universitas Mahasaraswati Denpasar (JITUMAS) Vol. 6 No. 1 (2026): Jurnal Ilmiah Teknik Unmas (Jitumas) Denpasar
Publisher : Fakultas Teknik Universitas Mahasaraswati Denpasar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36733/jitumas.v6i1.13801

Abstract

Air limbah domestik mengandung nitrogen dalam bentuk amonium (NH4+) yang berpotensi menurunkan kualitas perairan apabila tidak diolah secara memadai. Penelitian ini bertujuan menganalisis efektivitas sistem filtrasi biochar teraktivasi magnesium (Mg2+) dalam menyisihkan amonium dari air limbah domestik menggunakan reaktor aliran ke atas (upflow) yang terdiri atas empat kompartemen yang tersusun secara seri. Biochar biomassa kayu diaktivasi dengan larutan MgCl2 untuk meningkatkan adsorpsi dan sistem dioperasikan selama enam hari pada debit 100 mL/menit. Hasil penelitian menunjukkan bahwa konsentrasi NH4+ influen berfluktuasi pada kisaran 27,74–42,73 mg/L, sedangkan konsentrasi efluen relatif rendah dan stabil pada rentang 1,19–1,89 mg/L. Efisiensi penyisihan pada kompartemen akhir mencapai 94,28–96,53%, yang menunjukkan kemampuan sistem filtrasi efektif dalam menyisihkan NH4+ selama periode operasi. Efektivitas dipengaruhi oleh perpanjangan waktu kontak dalam sistem seri serta mekanisme pertukaran ion, interaksi elektrostatik, dan jembatan ionik oleh Mg2+ pada permukaan biochar. Secara keseluruhan, sistem menunjukkan efisiensi tinggi (>90%) dan stabil selama operasi, dengan tiga kompartemen telah memadai untuk mencapai kinerja optimal.
Co-Authors I Gusti Ngurah Made Wiratama I Made Wahyu Wijaya I Made Wahyu Wijaya Yudha Pratama, I Gede