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Jurnal Teknologi Lingkungan
Published by BRIN Publishing
ISSN : 1411318X     EISSN : 25486101     DOI : https://doi.org/10.55981/jtl
Core Subject : Science, Agriculture, Social, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Engineering Environmental Science
Jurnal Teknologi Lingkungan (JTL) is a journal aims to be a peer-reviewed platform and an authoritative source of information. JTL is published twice annually and provide scientific publication for researchers, engineers, practitioners, academicians, and observers in the field related to science and environmental technology. We publish original research papers and case studies focused on environmental sciences, environmental technology as well as other related topics to environment including sanitation, environmental biology, waste water treatment, solid waste treatment, environmental design and management, environmental impact assessment, environmental pollution control and environmental conservation. Jurnal Teknologi Lingkungan (JTL) adalah jurnal yang bertujuan untuk menjadi platform peer-review dan sumber informasi yang otoritatif. JTL diterbitkan dua kali setahun dan menyediakan publikasi ilmiah bagi para peneliti, insinyur, praktisi, akademisi, dan pemerhati di bidang yang berkaitan dengan ilmu pengetahuan dan teknologi lingkungan. Kami menerbitkan makalah penelitian asli dan studi kasus yang berfokus pada ilmu lingkungan, teknologi lingkungan serta topik terkait lainnya yang berhubungan dengan lingkungan termasuk sanitasi, biologi lingkungan, pengolahan air limbah, pengolahan limbah padat, desain dan manajemen lingkungan, analisis mengenai dampak lingkungan, pengendalian pencemaran lingkungan dan konservasi lingkungan.
Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Teknik Lingkungan
Articles 176 Documents
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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)

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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.
Karakteristik Biobriket dari Kotoran Sapi dengan Kulit Durian Arlini Radityaningrum; Bagus Harnawan
Jurnal Teknologi Lingkungan Vol. 23 No. 2 (2022)
Publisher : BRIN Publishing (Penerbit BRIN)

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Abstract

Cow manure derived biobriquette was an alternative fuel from organic materials. Cow manure contained high calorific value which was potential to be a biobriquette material. Durian bark waste was potential as a mixture material. Variation of material composition affected the biobriquette characteristics. This study aimed to investigate the biobriquette characteristics from the main material of cow manure with the mixture material of durian bark. Total mass of biobriquette materials and adhesive was 43 g, which consisted of cow manure and durian bark (90%) and adhesive material (10%). The material composition was varied in accordance to the percentage of the total mass. Tested parameters were moisture content, ash content, volatile matter, fixed carbon, calorific value, flame duration, and compressive strength value. Biobriquette quality standards were based on the Minister of Energy and Mineral Resources Regulation Number 047 of 2006 and SNI Number 1/6235/2000. Parameters of moisture content, ash content, and calorific value were the parameters that determined the highest quality of biobriquettes. The results showed that the highest quality of biobriquettes met the standards in the Minister of Energy and Mineral Resources Regulation Number 047 of 2006 and SNI Number 1/6235/2000. Biobriquettes with a composition of 20% cow manure, 70% durian skin, and 10% adhesive resulted in the highest quality with 0.90% of water content, 0.38% of ash content, 0.52% of volatile matter, 98.40% of fixed carbon, 4,912.11 Cal/g of the calorific value, and 79 minutes of flaming duration.
Keramba Jaring Apung SMART sebagai Inovasi Sistem Budidaya Ramah Lingkungan di Perairan Danau dan Waduk Andri Warsa; Lismining Pujiyani Astuti
Jurnal Teknologi Lingkungan Vol. 23 No. 2 (2022)
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Abstract

Aquaculture activity using floating net cage (FNC) in lake or reservoir was rapidly developing, and it was over carrying capacity. Uneaten feed and fish metabolisms were caused by water quality degradation. Some innovation was needed to diminish pollutant loading for cultivation activity, and SMART FCN can do it. SMART FNC is a water management system with circulation and aquatic plants as an innovation for conventional KJA. This paper aimed to shown SMART FCN construction as an eco-friendly cultivation system and estimate organic matter and phosphorus pollutant loading reduced by SMART FCN. The research was done at Cirata Reservoir in October–December 2019. The research using FCN with size 6x6 m with depth 4.5 m. The nile tilapia (Oreochromis niloticus) seed used was 15 kg with an average weight is 22.5 g/ind or with a density 7 ind/m3 or 775 fish total. It was feeding as much as 5% of the fish weight and three times per day. The average fish growth rate is 1.6 g/day with a food conversion ratio is 1.41, with a harvest biomass is 104.0 kg. FCR decreasing can reduce organic matter (OM) and total phosphorus for each ton of fish by 200 kg OM and 50.8 kg P, respectively. The filtration effectiveness of water spinach to decreasing P-PO4, BOT, NO2, and N-NO3 were 33.2, 31.2, 31.0, and 40.3%, respectively.
Kajian Potensi Air Tanah pada Formasi Vulkanik di Kecamatan Prambanan, Kabupaten Klaten, Jawa Tengah Erik Febriarta; Septian Vienastra; Gilang Arya Dipayana; Zulfahmi Sitompul; Ajeng Larasati
Jurnal Teknologi Lingkungan Vol. 23 No. 2 (2022)
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The presence of groundwater in volcanic rock formations is generally found in aquifer lithology in the form of loose deposits. The groundwater potential can be obtained by using the resistivity data approach. The purpose of this study was to determine the potential of aquifer parameters in volcanic formations on the middle slope of Mount Merapi in Prambanan District, Klaten Regency. The characteristics and thickness of the aquifer lithology can be determined by using the resistivity data approach which is correlated with rock material. Potential groundwater aquifer parameters were obtained from pump test measurements to determine the value of transmitivity (T) and value of permeability (K). The resistivity value is measured with a value range of 3 –75 ohm m which is interpreted by the aquifer lithology of loose material in the form of sand with fine to coarse grain sizes. The average thickness of the aquifer lithology is 80 m with free aquifer properties. Potential aquifer parameters in the form of transmitivity (T) of 330.6 m2/day and the value of permeability (K) of 8.03 m/day with an average aquifer thickness of 10 m. This value belongs to the category of high aquifer productivity potential.
Kajian Tingkat Kebisingan di Kawasan Rumah Sakit RSUD Sidoarjo di Masa Pandemi Maritha Nilam Kusuma; Dita Risti Fadhilah
Jurnal Teknologi Lingkungan Vol. 23 No. 2 (2022)
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Noise in the hospital has a negative impact on patients. According to the data obtained, the patient category is most affected by high noise levels, namely 31% reporting that elderly men are the most affected, while around 27% indicate that elderly women are the most affected, then 14% think that children are the most affected by noise. The impact can be in the form of reduced sleep time and disruption in the treatment process. Therefore, an analysis of the noise level in the hospital is carried out along with its mitigation as noise management in Sidoarjo Hospital. This noise level measurement was carried out for five days using a Sound Level Meter (SLM) measuring instrument with four sampling points. Then calculate the equivalent noise level (Leq), then calculate the daytime noise level (Ls), and finally do the mapping using Surfer software and recommend noise level mitigation in the hospital. The results showed that the noise level still exceeds the quality standard. On Wednesday, the noise level value is 69.59–76.21 dBA, Thursday 68.7–77 dBA, Friday 68–70.89 dBA, Saturday 72.91–79.68 dBA, and Sunday 70–74.73 dBA. Recommendations for mitigating noise reduction in hospitals are with the planting Durante repens, Casia siamea, Heliconia sp., and Vermenia obtusifolia.
Pengaruh Typha angustifolia, Echinodorus paniculatus, dan Ludwigia adscendens terhadap Kinerja Horizontal Sub-surface Flow Constructed Wetland dalam Penghapusan Total coliform dan TSS Abdul Gani Akhmad; Saiful Darman; Aiyen Aiyen; Wildani Pingkan S. Hamsens
Jurnal Teknologi Lingkungan Vol. 23 No. 2 (2022)
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The performance of the Wastewater Treatment Plants (WWTP) in several hospitals is reported low, where the wastewater often does not meet the quality standards so that it has the opportunity to pollute the environment. Horizontal Sub-surface Flow Constructed Wetland (HSSF-CW) is a green and sustainable technology; it can be used as an alternative technology for hospital wastewater treatment. This study aimed to evaluate the performance of HSSF-CW on a pilot-scale in the removal of total coliform (TC) and total suspended solids (TSS), as well as to assess the effect of Ludwigia adscendens, Echinodorus paniculatus, and Typha angustifolia plants on the performance of HSSF-CW using experimental methods. The operational and design strategy adopted was setting the water depth at 0.30 m, maximum hydraulic loading rate of 3.375 m3/day, continuous wastewater recirculation, the use of river sand-gravel media measuring 5–8 mm, as well as setting tight spacing for T. Angustifolia was 53 clumps per m2, L. adscendens 133 stems per m2, and E. paniculatus 13 clumps per m2. The results of this study indicate that the performance of the HSSF-CW system on a pilot-scale planted with L. adscendens, E. paniculatus, or T. Angustifolia has proven to be able to eliminate the TC and TSS parameters of hospital wastewater to match their respective quality standards in hydraulic retention times <2 and 4 days. It can be concluded that T. Angustifolia, E. paniculatus, and L. adscendens positively boost the performance of HSSF-CW in the removal of TC and TSS. However, T. Angustifolia had a better effect than E. paniculatus and L. adscendens on the performance of the HSSF-CW system. Abstrak Kinerja Instalasi Pengolahan Air Limbah (IPAL) beberapa rumah sakit dilaporkan rendah, dimana air buangannya seringkali tidak memenuhi baku mutu sehingga berpeluang mencemari lingkungan. Horizontal Sub-surface Flow Constructed Wetland (HSSF-CW) adalah teknologi hijau dan berkelanjutan, yang dapat digunakan sebagai teknologi alternatif untuk pengolahan air limbah rumah sakit. Penelitian ini bertujuan untuk mengevaluasi kinerja HSSF-CW skala percontohan dalam penghilangan total coliform (TC) dan total padatan tersuspensi (TSS), serta menilai pengaruh tumbuhan Ludwigia adscendens, Echinodorus paniculatus, dan Typha angustifolia terhadap kinerja HSSF-CW dengan metode eksperimental. Desain dan strategi operasional yang ditempuh adalah pengaturan kedalaman air pada 0,30 m, laju pemuatan hidrolik maksimal 3,375 m3/hari, resirkulasi air limbah secara kontinyu, pemakaian media pasir-kerikil sungai ukuran 5–8 mm, serta pengaturan jarak tanam yang rapat masing-masing untuk T. angustifolia adalah 53 rumpun per m2, L. adscendens 133 batang per m2, dan E. paniculatus 13 rumpun per m2. Hasil penelitian ini menunjukkan bahwa kinerja sistem HSSF-CW skala percontohan yang ditanami L. adscendens, E. paniculatus, ataupun T. angustifolia terbukti mampu menyisihkan parameter TC dan TSS air limbah rumah sakit hingga sesuai baku mutu dalam waktu retensi hidrolik <2 dan 4 hari. Dapat disimpulkan bahwa T. angustifolia, E. paniculatus, dan L. adscendens secara positif mendorong kinerja HSSF-CW dalam penghilangan TC dan TSS. Namun, T. angustifolia memiliki pengaruh lebih baik dibandingkan E. paniculatus dan L. adscendens terhadap kinerja sistem HSSF-CW.
Deep Eutectic Solvents from Palm Empty Fruit Bunch and Waste Cooking Oil: Synthesis, Characterization, and Catalytic Activity Irsal Hanafi; Tasya Widia Maharani; Muhammad Rauf Saputra; Masythoh Zulti; Ida Zahrina
Jurnal Teknologi Lingkungan Vol. 27 No. 2 (2026): Jurnal Teknologi Lingkungan
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Abstrak Deep Eutectic Solvents (DES) merupakan pelarut alternatif ramah lingkungan yang disintesis dari campuran komponen Akseptor Ikatan Hidrogen (AIH) dan Donor Ikatan Hidrogen (DIH). Pada riset ini, DES disintesis dari AIH yang diekstraksi dari abu limbah tandang kosong kelapa sawit (TKKS) dan DIH yang berasal dari poliol dalam minyak jelantah. Tujuan riset ini adalah untuk menentukan karakterisasi DES dengan variasi mol poliol dan K2CO3, dan untuk menguji aktivitas katalitiknya pada proses produksi biodiesel. Poliol diperoleh dari proses hidroksilasi minyak jelantah pada suhu 40oC selama 1,5 jam, sedangkan K2CO3 diperoleh dari hasil ekstraksi abu TKKS pada suhu 100oC selama 4 jam. DES dibentuk dari poliol dan K2CO3 melalui pengadukan selama 180 menit pada suhu 80oC dengan kecepatan pengadukan 300 rpm dengan variasi rasio mol AIH dan DIH yaitu 1:2, 1:3, 1:5, 1:7, dan 1:9. Pengujian aktivitas katalitik DES dilakukan dengan proses metanolisis Minyak Sawit Mentah (MSM) dengan rasio molar MSM terhadap metanol 1:20 selama 2,5 jam pada suhu 120oC dan dengan DES sebanyak 4% (berbasis MSM). DES berwujud cair tanpa endapan dan tidak berwarna dengan densitas melebihi 1 gr∙mL-1, viskositas pada rentang 1,18-1,76 cSt dan pH 1,1-1,45. Analisis FTIR dan NMR menunjukkan adanya ikatan hidrogen antara kalium karbonat dan poliol. DES menunjukkan aktivitas katalitik yang baik dalam produksi biodiesel, dengan menghasilkan rendemen sebesar 96,4% serta memenuhi standar mutu biodiesel (densitas dan viskositas). Abstract A Deep Eutectic Solvent (DES) is synthesized from a mixture of hydrogen bond acceptor (HBA) and hydrogen bond donor (HBD) components. In this study, DES was synthesized from HBA extracted from PEFB (Palm Empty Fruit Bunches) ash and HBD derived from polyol in waste cooking oil. The purpose of this study was to determine the characterization of DES with variations in the mol ratio of polyol to K2CO3, as well as to determine its catalytic activity in the biodiesel production. Polyol was obtained by hydroxylating waste cooking oil at 40°C for 1.5 hours. K2CO3 was extracted from PEFB ash. DES was formed from polyol and K2CO3 through stirring for 180 minutes at a temperature of 80°C with a agitation speed of 300 rpm with variations in the mol ratio of HBA:HBD, namely 1:2, 1:3, 1:5, 1:7, and 1:9. DES was tested for its catalytic activity on the methanolysis of CPO (Crude Palm Oil) with a molar ratio of CPO to methanol of 1:20 for 2.5 hours at a temperature of 120°C, with DES of 4% (based on weight of CPO). DES is a liquid without sediment and colorless, with a density exceeding 1 g∙mL-1, a viscosity in the range of 1.18–1.76 cSt, and a pH of 1.1–1.45. FTIR and NMR analysis indicate the presence of hydrogen bonds between potassium carbonate and polyol. DES shows good catalytic activity in biodiesel production, achieving a yield of 96.4% and meeting the quality standards (density and viscosity) for biodiesel.
Meta-Analysis of Green Roof Performance Parameters and Policy Readiness in Tropical Indonesia Fajri Gumilang
Jurnal Teknologi Lingkungan Vol. 27 No. 2 (2026): Jurnal Teknologi Lingkungan
Publisher : BRIN Publishing (Penerbit BRIN)

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Abstrak Urbanisasi pesat di Indonesia memperburuk urban heat island (UHI) dan degradasi lingkungan perkotaan. Penelitian ini mengevaluasi efektivitas atap hijau sebagai instrumen kebijakan pembangunan perkotaan berkelanjutan di wilayah tropis, sekaligus menjadi acuan regulasi seperti di Singapura. Pendekatan integratif multitahap digunakan melalui systematic literature review (SLR) berbasis PRISMA 2020 (2020–2025), meta-analisis kuantitatif 20 parameter operasional, dan analisis siklus kebijakan, dengan data ditriangulasi dari Scopus, ScienceDirect, dan Google Scholar untuk memetakan korelasi kinerja teknis dan kesiapan regulasi. Hasil menunjukkan atap hijau menawarkan keunggulan ganda, meningkatkan ketahanan lingkungan dan efisiensi biaya jangka panjang dibanding sistem fotovoltaik surya. Evaluasi difokuskan pada kinerja termal (penurunan suhu ruang hingga 13,14 °C; pengurangan beban pendinginan ±40%), mitigasi hidrologi (retensi air hujan 85,7%), serta fungsi sosial-spasial melalui pertanian perkotaan dan ketahanan pangan. Implementasi di Indonesia masih terfragmentasi akibat ketiadaan standar bangunan wajib dan minim insentif finansial. Transformasi pedoman teknis menjadi regulasi nasional yang mengikat, didukung pemetaan berbasis SIG, menjadi prasyarat strategis untuk transisi kota tangguh iklim dan pengambilan kebijakan perkotaan berkelanjutan. Abstract In Indonesia, rapid urban growth has worsened the urban heat island effect and led to more environmental degradation from urban areas. This study evaluates how green roofs are a sustainable urban development policy instrument in tropical regions while also providing a regulatory benchmark for comparison against Singaporean green roof practices. An integrative multi-phase approach was taken using a PRISMA 2020-based systematic literature review (2020-2025), quantitative meta-analysis of twenty operational parameters, and policy cycle analysis. The data sources were triangulated between Scopus, Science Direct, and Google Scholar to identify correlations between technical performance and regulatory readiness for green roofs. Findings for green roofs suggest that they provide dual benefits via improved environmental resilience and much greater long-term cost effectiveness compared to photovoltaic solar panels. The evaluation reviews three areas of impact: thermal performance (reduction of indoor temperatures up to 13.14 °C and cooling loads by approximately 40%), hydrological mitigation (rainwater retention up to 85.7%), and socio-spatial benefits through urban agriculture and food security. However, implementation of green roofs in Indonesia remains fragmented due to a lack of mandatory building codes and an absence of significant financial incentives to promote widespread adoption. Transforming technical guidelines into binding national regulations, supported by GIS-based spatial mapping, constitutes a strategic prerequisite for advancing climate-resilient cities and evidence-based sustainable urban policymaking.
Synthesis and Characterization of Cellulose-Based Hydrogel from Furniture Waste as a Sustainable Plant Growth Medium Yayan Dwi Sutarni; Shofi Nailin Ni'mah; Zahra Arika Putri; Syafriyanti Annur
Jurnal Teknologi Lingkungan Vol. 27 No. 2 (2026): Jurnal Teknologi Lingkungan
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Abstrak Sumber biomassa yang berasal dari limbah kayu industri furnitur belum banyak dimanfaatkan. Dalam penelitian ini, selulosa diekstraksi dari limbah kayu furnitur melalui beberapa tahap. Tahap pertama yaitu maserasi menggunakan etanol dilanjutkan hidrolisis menggunakan asam nitrat. Delignifikasi menggunakan basa, dilanjutkan dengan tahap pemutihan menggunakan hidrogen peroksida. Proses tersebut menghasilkan selulosa murni sebanyak 30% dengan kadar abu dan kadar air yang rendah (berturut-turut 0.56 dan 2,6%). Struktur selulosa dikonfirmasi melalui karakterisasi dengan FTIR. Munculnya serapan khas O–H, C–H, dan C=O menandakan selulosa telah berhasil diisolasi. Selulosa kemudian diikat silang dengan glutaraldehida untuk menghasilkan hidrogel (WWF hidrogel). Hidrogel ini mempunyai daya serap air yang tinggi dan stabil secara struktural. Uji coba aplikasi hidrogel sebagai media tanam untuk Dracaena sanderiana (bambu hoki) menunjukkan bahwa hidrogel WWF meningkatkan pertumbuhan tanaman sebesar 4,5% selama 10 hari, lebih besar dibandingkan dengan hidrogel komersial, yaitu sebesar 1,79%. Hasil ini menunjukkan bahwa hidrogel berbasis selulosa yang berasal dari limbah furnitur dapat berfungsi sebagai media tanam dengan penahan air yang efektif. Selain itu, material baru ini juga memberikan alternatif pemanfaatan limbah kayu yang berkelanjutan untuk meningkatkan nilainya. Abstract Biomass resources from furniture wood waste have not been widely used. In this study, furniture wood waste biomass was used as a cellulose source. Isolation of cellulose from furniture waste was carried out through a sequential process comprising maceration, hydrolysis, delignification, and bleaching. In this study, 30% purified cellulose was obtained from furniture waste, with 0.56% ash and 2.6% moisture content. FTIR spectra revealed that the structure of cellulose consisted of O-H, C-H, and C=O bands. Cellulose was then crosslinked with glutaraldehyde to form hydrogels (WWF hydrogel). This hydrogel has a high swelling and high structural stability. As a growth medium for Dracaena sanderiana (lucky bamboo), WWF hydrogel increased plant growth by 4.5% in 10 days. This is higher than that of commercial hydrogel, which is only 1.79%. These results confirmed that cellulose-based hydrogels derived from furniture waste could act as an effective water-retaining growth medium. Also, this new material offers a sustainable utilization pathway for increasing the value of biomass from furniture waste.
COD and Phosphate Distribution Analysis from Domestic and Agricultural Activities Along Irrigation Channel in Metro City, Lampung, Indonesia Nur Faizaturrohmah; Cheisyha Alfiradina; Annisa Fadhilah; Daffa Adli Nauval Purnomo; Ahmad Daudsyah Imami; Dion Awfa; Rifka Noor Azizah
Jurnal Teknologi Lingkungan Vol. 27 No. 2 (2026): Jurnal Teknologi Lingkungan
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Abstrak Kualitas air irigasi memiliki peran penting dalam mendukung ketahanan pangan, keberlanjutan ekosistem, dan kesehatan masyarakat. Kecamatan Metro Pusat di Kota Metro, Lampung, sebagai wilayah yang bergantung pada sistem irigasi pertanian, rentan terhadap pencemaran dari sumber domestik dan non-domestik. Penelitian ini bertujuan menganalisis konsentrasi Chemical Oxygen Demand (COD) dan fosfat pada saluran irigasi serta memprediksi distribusi polutan di bagian hilir yang berasal dari aktivitas rumah tangga dan pertanian. Pengambilan sampel dilakukan pada empat titik Non-Point Source (NPS) dan tiga titik Point Source (PS). Hasil penelitian menunjukkan bahwa seluruh nilai COD melebihi baku mutu Kelas II berdasarkan Peraturan Pemerintah Nomor 22 Tahun 2021. Konsentrasi tertinggi ditemukan pada PS1 sebesar 285 mgL-1, sedangkan konsentrasi fosfat tertinggi terdapat pada PS2 sebesar 4,34 mgL-1, yang dipengaruhi oleh pembuangan deterjen dan limbah organik domestik. Dengan menggunakan metode neraca massa melalui pemodelan analitik, diprediksi adanya penurunan konsentrasi polutan di sepanjang aliran irigasi akibat proses sedimentasi dan degradasi alami. Konsentrasi COD menurun dari 104,93 mgL-1pada segmen 1 (CR1) menjadi 89,63 mgL-1 pada segmen 2 (CR2) dan 50 mgL-1 pada segmen 3 (CR3). Konsentrasi ortofosfat menunjukkan pola serupa, yaitu penurunan dari 0,06512 mgL-1 (CR1) menjadi 0,06510 mgL-1 (CR2) dan 0,06481 mgL-1 (CR3). Oleh karena itu, pengendalian beban pencemaran, terutama di bagian hulu, sangat penting untuk menjaga keberlanjutan kualitas air. Hasil penelitian ini dapat menjadi rujukan bagi pemerintah daerah dalam merumuskan strategi pengelolaan sumber daya air yang berkelanjutan. Abstract Irrigation water quality is of major importance for public health, environmental sustainability and food security. Located in the heavy agricultural irrigation systems, the Central Metro District in Lampung, Metro City, is vulnerable to contamination from domestic and external sources. The objective of this study is to determine the concentration of phosphate and COD (Chemical Oxygen Demand) in the district irrigation channel and to predict the spread of pollutants downstream due to residential and agricultural activities. The study was conducted at three Point Source (PS) and four Non-Point Source (NPS) sites. The results showed that all COD measurements exceeded the water quality limits of Class II based on Government Regulation No. 22 of 2021. The highest COD content (285 mgL-1) was recorded in PS1 and the highest phosphate concentration (4.34 mgL-1) in PS2. Both were affected by the discharge of domestic organic waste from residential areas and detergents. The study used analytical modelling and a mass balance approach to estimate a slow decrease in pollutant concentrations downstream as a result of natural sedimentation and degradation processes. COD levels decreased from 104.93 mgL-1 in segment 1 or combined concentration NPS 1 (CR1) to 89.63 mgL-1 in segment 2 (CR2) and 50 mgL-1 in segment 3 (CR3). Orthophosphate concentrations exhibited a similar pattern, decreasing from 0.06512 mgL-1 (CR1) to 0.06510 mgL-1 (CR2) and 0.06481 mgL-1 (CR3). Therefore, lowering the total pollutant load in the irrigation system requires upstream pollution control. It is anticipated that the results of this study will assist local governments in developing sustainable plans for managing water resources.

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