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I Made Wahyu Wijaya
Program Studi Perencanaan Wilayah dan Perdesaan, Program Pascasarjana, Universitas Mahasaraswati Denpasar
Energy Engineering Environmental Science

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ANALISIS KONDISI PENGELOLAAN SAMPAH BERKELANJUTAN DI TPA TEMESI GIANYAR Alfret Lango Reda Mata; I Kadek Widiantara; 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.v6i1.13779

Abstract

Sustainable waste management has become a highly strategic issue in Gianyar Regency, Bali, in line with the increasing volume of waste generation and the limited capacity of final disposal sites. This study aims to analyze the existing conditions and performance of waste management at the Temesi landfill based on technical, environmental, economic, and social aspects. The method employed is a descriptive-quantitative approach, involving field observations, interviews with site managers, documentation of operational data from January to May 2025, and mass balance analysis. The results indicate that the total waste generation reached 30,964 tons, with an average of 213.54 tons per day, predominantly composed of organic waste. Approximately 50.16% of the waste is processed into compost, 11.08% is recycled, and 38.76% remains as residual waste disposed of in the landfill. The material recovery rate has reached 61%, indicating that the system is moving toward the implementation of circular economy principles. Economically, the waste bank operation generates a surplus of IDR 149,933,210. However, environmental aspects remain a major challenge, particularly due to the suboptimal leachate treatment system, which poses a potential risk of environmental pollution. Furthermore, improvements in technological capacity and community participation are required to support more sustainable waste management.
ANALISIS KARAKTERISTIK FILTRASI DENGAN MEDIA BIOCHAR UNTUK PENURUNAN KONSENTRASI AMMONIUM DAN FOSFAT Filemon Bram Gunas Junior; Shinta Enggar Maharani; 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.v6i1.13807

Abstract

This study is motivated by the high concentration of nutrients, particularly ammonium (NH₄⁺) and phosphate (PO₄³⁻), in domestic wastewater, which can lead to eutrophication if not properly treated. The objective of this research is to analyze the hydraulic characteristics and filtration performance of biochar media in a two-compartment filtration system for domestic wastewater treatment. The study was conducted experimentally using a laboratory-scale filtration unit with effective dimensions of 200 mm × 200 mm and a media height of 700 mm. The system was operated under continuous flow conditions at a discharge rate of 50 L/h for 3 hours per day. The analyzed parameters included filtration effectiveness duration, bed volume (BV), head loss, permeability coefficient (K), and hydraulic retention time (HRT), as well as the removal efficiency of ammonium and phosphate, measured using spectrophotometric methods. The results showed that the filtration effectiveness duration reached 28.17 hours, with a total treated water volume of 1.4083 m³, equivalent to 66.45 BV. The head loss value of 0.50 m remained relatively stable throughout the operation, indicating no significant clogging of the media. The permeability coefficient of 3.12 × 10⁻⁴ m/s indicates moderate to high permeability, with an HRT ranging from 21 to 25 minutes. The biochar media achieved ammonium removal efficiencies of 65–75% and significantly reduced phosphate concentrations, with the highest efficiency observed at the initial stage before declining due to media saturation.
ANALISIS KARAKTERISTIK FILTRASI DAN EFISIENSI ADSORPSI AMONIUM PADA SISTEM FILTER BIOCHAR TERAKTIVASI Mg2+ Dewa Agung Dibyacitta; I Gede Yudha Pratama; 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.
Co-Authors Alfret Lango Reda Mata Dewa Agung Dibyacitta Filemon Bram Gunas Junior I Gede Yudha Pratama I Kadek Widiantara Shinta Enggar Maharani