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Analisis Pembentukan Sludge Granular Dari Lumpur Anaerobik Pengolahan Limbah Di Effluent Treatment Plant PT XYZ Agustin, Dewi; Arida, Vera; Auvaria, Shinfi Wazna; Ratnawati, Rhenny
JURNAL TECHLINK Vol 9 No 2 (2025): Vol. 9 No. 2 (2025)
Publisher : Fakultas Teknik - Universitas Satya Negara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59134/jtnk.v9i2.734

Abstract

Wastewater from the palm oil production process contains high levels of organic matter, so the appropriate treatment to remove organic matter is anaerobic processing. At PT XYZ, several types of reactors are used in the anaerobic process, including Upflow Anaerobic Sludge Blanket (UASB), Expanded Granular Sludge Blanket (EGSB), Internal Circulation (IC) Tank, dan Super Internal Circulation Tank. The bacteria used are generally granular in shape, which settle more quickly, but in field conditions, the bacteria used for UASB are sludge powdering, which tends to wash out. This can reduce the efficiency of wastewater treatment. The purpose of this study is to analyze the formation of granular sludge from sludge powdering in UASB reactors. The method used was experimental using a beaker glass reactor operated for 6 weeks. The principle of coagulation flocculation was used with the addition of 0.3 g/L/hr of urea as nutrients for bacteria and FeCl3 as a binding agent. The stages of this study included sampling, reactor operation, observation & treatment, and data analysis. The results showed that the UASB reactor did not form granular sludge, because the sludge produced was in the form of fine flocs. The addition of FeCl3 and urea caused the pH value of the reactor to fluctuate and tend to be alkaline, resulting in conditions that were not optimal for the activity of granular-forming bacteria. Therefore, granular sludge was not obtained from the experiment using UASB sludge powdering with a glass beaker reactor.
Kemampuan Bacillus subtilis dalam mendegradasi limbah plastik polystyrene ditinjau dari perubahan berat kering dan spektrum Fourier Transform Infra-Red (FTIR) Putri Darmansyah, Alifia; Purnamasari, Risa; Wazna Auvaria, Shinfi
Biotropic : The Journal of Tropical Biology Vol. 9 No. 2 (2025): Biotropic, Volume 9 Nomor 2, 2025
Publisher : Program Studi Biologi, Fakultas Sains dan Teknologi, Universitas Islam Negeri Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/biotropic.v9i2.2373

Abstract

Polystyrene is a type of plastic that is difficult to decompose naturally and  one of the main causes of environmental problems, especially in Indonesia, styrofoam waste in 2023 reached more than 32 million tons per year. This study uses quantitative descriptive and experimental methods to determine the ability of Bacillus subtilis bacteria to decompose polystyrene waste. The quantitative descriptive method was carried out by measuring the decrease in dry weight of polystyrene, while the experimental method was carried out by incubating 1x1 cm and 2x2 cm polystyrene samples with B. subtilis in Bushnell Haas media at 37°C for 40 days, with observations performed every 10 days. In addition, chemical changes in polystyrene were observed using Fourier Transform Infrared (FTIR) to see changes in functional groups. The results showed that the 1×1 cm sample experienced a weight loss of up to 20.65% after 40 days, while the 2×2 cm sample only decreased by 8.70%. FTIR analysis showed changes in absorption intensity and the appearance of carbonyl (C=O) and hydroxyl (O–H) groups, indicating the occurrence of oxidation and polymer chain cleavage. In conclusion, Bacillus subtilis was able to degrade polystyrene gradually, with effectiveness influenced by the size of the sample surface and the length of incubation time.
EVALUASI PENGELOLAAN LIMBAH MEDIS PADAT DI RUMAH SAKIT X KABUPATEN GRESIK, JAWA TIMUR, INDONESIA Agustini, Elyana; Nilandita, Widya; Ratnawati, Rhenny; Auvaria, Shinfi Wazna
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.v6i1.12926

Abstract

X Hospital in Gresik Regency is a hospital that generates a significant amount of solid medical waste. Solid medical waste has the potential to pollute the environment and pose health risks if not managed properly. This study aims to identify and evaluate the solid medical waste management system implemented at X Hospital in Gresik. The research method used is descriptive, including observation, documentation, and interviews, using secondary data regarding the existing conditions of hazardous and toxic (B3) waste generation and the Standard Operating Procedures for B3 waste management in effect at X Hospital. Data analysis was carried out with reference to the Regulation of the Minister of Health of the Republic of Indonesia Number 2 2023, the Regulation of the Minister of Environment and Forestry of the Republic of Indonesia Number 56 2015, and Government Regulation Number 22 2021. The results indicate that medical waste originates from almost all hospital service installations, categorized as infectious, sharp, and non-infectious waste. The amount of infectious waste from January to April 2025 reached 23,697.5 kg, while non-infectious waste amounted to 8,341 kg. The management system includes sorting, packaging, internal transportation, temporary storage, treatment, and collaboration with third parties. Solid medical waste management at Hospital X has been carried out quite well in accordance with applicable regulations.
The Estimation of the Global Warming Potential (GWP) in the Scenario of Domestic Waste Management in Sukabumi City Thayyibah Nazlatul Ain; Shinfi Wazna Auvaria; Dyah Ratri Nurmaningsih
Jurnal Teknologi Lingkungan Vol. 23 No. 2 (2022)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Potensi pemanasan global disebabkan oleh beberapa aktivitas manusia, salah satunya pengelolaan sampah. Pengelolaan sampah menghasilkan potensi pemanasan global dari proses pengangkutan dan pengolahan yang berhubungan dengan material, kebutuhan energi dan hasil sampling dari keseluruhan prosesnya. Dampak lingkungan dari pengelolaan sampah sering kali tidak dipertimbangkan. Hal tersebut akan berpengaruh pada penerapan regulasi untuk mengelola sampah secara holistik. Penelitian ini bertujuan untuk mengetahui skenario terbaik dengan potensi pemanasan global yang paling rendah dari pengelolaan sampah rumah tangga dengan mempertimbangkan dampak lingkungan dari proses pengelolaanya terutama yang berhubungan dengan potensi pemanasan global. Penelitian ini menggunakan pendekatan penilaian daur hidup atau LCA menurut ISO 14040:2006 dengan unit fungsional 1 ton sampah rumah tangga. Kategori dampak dibatasi hanya untuk analisis potensi pemanasan global dari ketiga skenario yang ditentukan berdasarkan tujuan dan definisi. Metode analisis dampak (LCIA) menggunakan Center of Environmental Science Leiden University Impact Assessment (CML-IA) dengan software SimaPro program versi 9.1. Hasil penelitian menunjukan bahwa skenario terbaik dengan potensi pemanasan paling rendah yang dianalisis dengan pendekatan LCA adalah skenario 2 dengan 5,0 × 10-6 kg CO2-eq, sedangkan skenario 0 adalah 1,21 × 10-5 kg CO2-eq dan skenario 1 adalah 6,0001 kg CO2-eq. Maka, pengelolaan sampah rumah tangga terbaik dengan dampak paling kecil adalah pengelolaan dengan skenario 2, meliputi: pemilahan sampah, komposting rumah tangga, penyaluran ke bank sampah, dan pengangkutan residu ke TPA.
ANALISIS POTENSI SEBARAN KONTAMINAN LINDI TPA TAMBAKRIGADUNG TERHADAP AIR TANAH MENGGUNAKAN MODFLOW DAN MT3DMS Ni'mah, Mutiara Ulin; Suprayogi, Dedy; Hakim, Abdul; Auvaria, Shinfi Wazna; Falasifah, Nihlatul
Jurnal Riset Rekayasa Sipil Vol 9, No 2 (2026): Maret 2026
Publisher : Prodi Teknik Sipil Fakultas Teknik Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jrrs.v9i2.107161

Abstract

Population growth, economic development, and improved public welfare in Indonesia have led to a significant increase in domestic waste generation. In Lamongan Regency, this condition has directly contributed to the growing amount of waste disposed of at the Tambakrigadung Landfill. The accumulation of large volumes of waste produces leachate, a dark-colored liquid formed through rainwater infiltration and the decomposition of organic matter. This leachate contains various hazardous pollutants, including heavy metals such as mercury (Hg) and cadmium (Cd), which can contaminate soil and groundwater. This study aims to analyze the potential distribution of leachate contaminants using GMS-based MODFLOW and MT3DMS modeling, as the first application at the Tambakrigadung Landfill. Model parameters were derived from primary and secondary data, assuming a single saturated aquifer and steady-state flow conditions. Simulations were carried out over 25 years to map groundwater flow directions and contaminant distribution patterns. The MODFLOW simulation results indicate a dominant groundwater flow direction from south to north, while MT3DMS results show that after 25 years, Hg contaminants spread approximately 112 meters with a final concentration below 0.005 mg/L, and Cd spread about 107 meters with a concentration below 0.021 mg/L. The very low RMSE values (Hg = 0.0006; Cd = 0.0002) indicate a high level of model accuracy in representing actual field conditions.