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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan Jurnal Abadimas Adi Buana Al-Ard: Jurnal Teknik Lingkungan Jurnal EnviScience (Environment Science) Nusantara Science and Technology Proceedings Jurnal Komposit : Jurnal Ilmu-Ilmu Teknik Sipil Envirous AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Environmental Engineering Journal ITATS Journal Serambi Engineering (JSE)
Rosariawari, Firra
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Optimization of Electro-Fenton Process in Reducing COD and TSS Levels in Batik Wastewater Ramadeandra, Shafa Azzahra; Rosariawari, Firra
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 9 No. 3 (2025)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v9i3.816

Abstract

Batik industries, ranging from household-scale to large-scale, generate wastewater containing high levels of organic compounds, dyes, and other pollutants such as COD (Chemical Oxygen Demand) and TSS (Total Suspended Solids), which are difficult to degrade. Wastewater treatment is necessary to reduce pollutant content to meet environmental quality standards. Therefore, this study investigates the effectiveness of the Advanced Oxidation Process (AOP) using the electro-Fenton method. The objective of this research is to analyse the effectiveness of and optimise the ElectroFenton process for reducing COD and TSS in batik wastewater. The study aims to determine the optimal combination of current intensity, contact time, and molar ratio of H2O2:FeSO4 that yields the highest removal efficiency. Based on the survey, the electro-Fenton treatment achieved a COD removal efficiency of 77.14% under conditions of 5 amperes current, 55 minutes contact time, and ratio of 10:0.3. At a current of 3 amperes, a contact time of 55 minutes, and a ratio of 10:0.3, the TSS removal efficiency was 98.3%. Contribution to Sustainable Development Goals (SDGs):SDG 6: Clean Water and SanitationSDG 12: Responsible Consumption and ProductionSDG 14: Life Below WaterSDG 15: Life on Land
Utilization of Fly Ash in the Fertilizer Industry as an Alternative to Synthetic Coagulants with the Addition of H₂SO₄ Pratama, Bagas Chrisma; Rosariawari, Firra
JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan Vol 22 No 2 (2025): Jurnal Kesehatan Lingkungan Volume 22 No. 2, Juli 2025
Publisher : Poltekkes Kemenkes Banjarmasin Jurusan Kesehatan Lingkungan Banjarbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31964/jkl.v22i2.983

Abstract

This study aimed to utilize fly ash, a solid waste generated from coal combustion in the fertilizer industry, as an alternative coagulant for wastewater treatment. Fly ash was activated using H₂SO₄ at varying concentrations (2%, 4%, 6%, and 8%) and coagulant dosages (2 mL, 4 mL, and 6 mL). The effectiveness of fly ash as a coagulant in degrading suspended particles and Chemical Oxygen Demand (COD), as well as in reducing wastewater pH, was analyzed using the jar test method. The results demonstrated that fly ash coagulant was effective in reducing Total Suspended Solids (TSS) and COD, with the most significant reduction observed at a dosage of 4 mL and an H₂SO₄ concentration of 8%. Under these conditions, TSS decreased by 82.35% (from 0.79019 kg/ton to 0.13945 kg/ton), while COD decreased by 72.72% (from 0.02045 kg/ton to 0.00558 kg/ton). Correlation analysis indicated a strong relationship between H₂SO₄ concentration, coagulant dosage, and the reduction of TSS and COD. Although effective in reducing TSS and COD, the fly ash coagulant caused a decrease in wastewater pH due to its acidic nature. Further research is required to improve wastewater pH after the addition of fly ash coagulant.
Analisis Dampak Lingkungan Emisi Gas Rumah Kaca Menggunakan Metode Life Cycle Assessment di Perusahaan Penyedia Layanan dan Perakitan Sistem Turbocharger Suhada, Aisyah Ramadhanti; Murti, Restu Hikmah Ayu; Rachmanto, Tuhu Agung; Wibisana, Hendrata; Rosariawari, Firra
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Greenhouse gas (GHG) emissions from the industrial sector have a significant impact on global climate change. To assess the overall environmental impact, an analysis capable of mapping emissions from various operational activities is required. This study aims to analyze GHG emissions in a manufacturing company that focuses on turbocharger system assembly and services using the Life Cycle Assessment (LCA) method. The analysis was conducted with reference to the 2006 IPCC Guidelines and openLCA software, with the scope of research covering the transportation and energy sectors within the company. The inventory results show that the energy sector is the main contributor to emissions, with the largest impact category being climate change (GWP 100a). Next, a scenario analysis was conducted, namely real conditions, the use of solar panels, the use of diesel fuel, and a mixture. A comparison of the scenarios showed that the use of renewable energy in the form of solar panels could significantly reduce GHG emissions compared to the current conditions. This study confirms that the application of LCA can provide a quantitative picture of the potential environmental impact and serve as a scientific basis for formulating GHG emission management strategies in the industrial sector.
Batik Wastewater Treatment: Performance of Combination PAC with Hydrocyclone Separation Rosariawari, Firra; Amalia, Aussie; Dienullah, R Mohammad Alghaf; Fauzianto, Fajar Shufi; Rizqa, Fauzul
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 23, No 1 (2026): March 2026
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v23i1.188-202

Abstract

Batik wastewater contains high levels of total suspended solids (TSS) and turbidity, making it difficult to decompose naturally. To prevent environmental pollution, this study investigated a treatment method that combined coagulation in a mixing tank and flocculation using a hydrocyclone. Polyaluminum chloride (PAC) was used as the coagulant. The coagulation process was tested at stirring speeds of 100–140 rpm and coagulant doses of 150–300 mg/L. The results showed that a coagulant dose of 300 mg/L and a stirring speed of 140 rpm achieved the highest removal efficiencies: 95.45% for TSS and 95.24% for turbidity. A two-way analysis of variance (ANOVA) confirmed that the coagulant dose significantly affected removal efficiency (p=0.049), whereas the stirring speed did not have a significant effect (p=0.77). Furthermore, particle size analysis (PSA) and zeta potential tests indicated that the PAC coagulant successfully destabilized the suspension in the wastewater, leading to the formation of large aggregates and accelerating the separation process. Overall, these results indicate that combining a coagulation mixing tank with a hydrocyclone flocculation unit offers an efficient and rapid solution for treating batik wastewater.  
Analisis Pengaruh Media Imobilisasi Kasa dan Resin Terhadap Laju Penurunan Escherichia Coli Dengan Fotokatalis TiO2 Ralanita, Zahra Rahimaputri; Rosariawari, Firra
Jurnal Serambi Engineering Vol. 11 No. 2 (2026): April 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Adanya kontaminasi bakteri Escherichia Coli pada air tanah di kawasan padat penduduk pada salah satu kota besar di Indonesia yaitu Surabaya menjadi ancaman yang serius bagi kesehatan masyarakat dan keberlanjutannya. Proses fotokatalis menggunakan TiO2 merupakan salah satu teknologi alternatif yang efektif untuk menurunkan laju bakteri Escherichia Coli tanpa menghasilkan residu berbahaya. Penelitian ini dilakukan untuk menganalisis efektivitas dan laju kinetika penurunan bakteri Escherichia Coli menggunakan dua sistem reaktor dengan media immobilisasi yang berbeda yaitu media kasa berlapis TiO2 dan RIPT-TiO2. Reaktor dirancang secara annular dengan diameter 10 cm dan tinggi 26 cm yang dioperasikan pada variasi waktu 10, 20, dan 30 menit. Sampel air tanah memiliki konsentrasi E. Coli awal sebesar 170 MPN/100 mL. Immobilisasi kasa dilakukan menggunakan metode dip-coating, sedangkan pada resin dilakukan pengadukan selama 72 jam. Hasil ini menunjukkan persentase penyisihan bakteri dan konstanta laju penurunan pada kedua sistem reaktor. Hasil penelitian diharapkan akan memberikan rekomendasi media immobilisasi yang paling stabil dan efisien untuk pengembangan teknologi pengolahan air bersih di masa depan.
Analisis Pengaruh Karakteristik Aliran Laminer dan Turbulen Pada Fotokatalitik Terhadap Penurunan Bakteri Escherichia Coli Dalam Air Tanah Putri Dinatha, Nabila; Rosariawari, Firra
Jurnal Serambi Engineering Vol. 11 No. 2 (2026): April 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Air tanah di kawasan padat penduduk berpotensi mengalami pencemaran biologis akibat keberadaan bakteri Escherichia coli yang dapat membahayakan kesehatan masyarakat. Penelitian ini bertujuan menganalisis efektivitas proses fotokatalisis dengan perbedaan karakteristik aliran laminer dan turbulen dalam menurunkan bakteri Escherichia coli pada air tanah. Penelitian skala laboratorium ini menggunakan reaktor fixed bed photocatalytic continuous flow dengan katalis TiO₂ terimobilisasi pada media kasa dan penyinaran sinar ultraviolet (UV). Variabel yang diuji meliputi jenis aliran (laminer dan turbulen), variasi Hydraulic Retention Time (HRT) selama 10, 20, dan 30 menit, serta pengaruh kadar Dissolved Oxygen (DO). Tahapan penelitian mencakup persiapan katalis melalui metode dip coating, karakterisasi air baku, serta pengoperasian reaktor hingga kondisi stabil. Hasil menunjukkan bahwa kondisi operasional optimum tercapai pada proses fotokatalis aliran turbulen dengan HRT 30 menit, yang menghasilkan penurunan bakteri Escherichia coli lebih tinggi dibandingkan aliran laminer. Peningkatan kadar DO pada sistem turbulen turut meningkatkan efisiensi proses melalui pembentukan reactive oxygen species (ROS) yang lebih besar. Parameter pendukung seperti pH, suhu, dan kekeruhan berada pada rentang yang mendukung proses fotokatalisis. Disimpulkan bahwa peningkatan intensitas pencampuran dan waktu tinggal berbanding lurus dengan efisiensi penurunan bakteri karena meningkatkan kontak antara bakteri, oksigen terlarut, permukaan katalis, dan radikal oksidatif.
Co-Authors Addzikri, Ahmad Iqbal Ali, Munawar Almadhany, Muhammad Aussie Amalia Azzahra, Maulayya Fatimah Cahyani, Nurilita Amalia Dienullah, R Mohammad Alghaf Dwi Arman Prasetya Dyani, Olla Kemala Edy Mulyadi Euis Nurul Hidayah Eva Oktavia, Eva Faradina, Nasilla Aulia Fauzianto, Fajar Shufi Hendrata Wibisana Hikmah Ayu M, Restu Jariyah Jawwad, Muhammad Abdus Salam Kasih, Bunga Cinta Krisnawati, Anik Kristianto P, Alfredo Kurnia Sari, Hanna Putri Maharani, Cahya Nova Putri Maroeto Maroeto Nisa', Syadzadhiya Qothrunada Zakiyayasin Nisa, Syadzadhiya Qothrunada Zakiyayasin Novembrianto, Rizka Novianto, Dwi Agus Novirina Hendrasarie Nurrahma, Anisa Okik Hendriyanto Cahyonugroho Oktavianto, Achmad Afandi Pamungkas, Lestari Ayu Septian Praditya Sigit Ardisty Sitogasa Pratama, Bagas Chrisma Putri Dinatha, Nabila Rachmanto, Tuhu Agung Ralanita, Zahra Rahimaputri Ramadeandra, Shafa Azzahra Restu Hikmah Ayu Murti Rhomadhoni, Muslikha Nourma Rizki, Azizah Mahirah Rizqa, Fauzul Romadon, Syahrul Rositasari, Putri Redita Sagita Rochman Serenai, Fabian Pascalis Shalsabila, Marshanda Afifa Sholikin, Mohamad Siti Nuurlaily Rukmana, Siti Nuurlaily Suhada, Aisyah Ramadhanti Susanti, Laila Wahyu Tampubolon, Debora Rousyella Saulina Thohiroh, Mubayyinatuth Utami, Atikah Margi Yunia Dwie Nurchayanie