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Ratnawati, Rhenny
Universitas PGRI Adi Buana Surabaya
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PENGOLAHAN LIMBAH CAIR INDUSTRI ADHESIVE TAPE MENGGUNAKAN METODE ELEKTROKOAGULASI Wahid, Ahmad; Sugito, Sugito; Widyastuti, Sri; Ratnawati, Rhenny
Purifikasi Vol 24 No 2 (2025): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Planning, and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/purifikasi.v25i2.469

Abstract

Limbah cair dari hasil industri adhesive tape mengandung kadar COD, TSS, amonia total, minyak lemak dan pH yang tinggi. Penelitian ini bertujuan untuk mengkaji pengaruh variasi tegangan dan waktu kontak saat proses elektrokoagulasi terhadap penurunan kadar COD, TSS, amonia total, minyak lemak dan pH pada limbah adhesive tape. Pengujian dilakukan menggunakan reaktor berukuran 20 cm x 20 cm x 14 cm. Tegangan yang digunakan adalah 8V, 14V dan 20V, sedangkan waktu kontak terdiri dari 40 menit dan 70 menit. Elektroda yang digunakan adalah plat Seng (Zn) dengan ukuran 10 cm x 4 cm dengan jumlah total 8 plat. Hasil penelitian menunjukkan bahwa tegangan yang paling efektif adalah 20V dengan waktu pengolahan selama 70 menit. Efisiensi penurunan kadar COD sebesar 99,12% TSS sebesar 89,61% amonia total sebesar 93,14% dan minyak lemak sebesar 97,38%.
PERENCANAAN DESAIN TEMPAT PENYIMPANAN SEMENTARA (TPS) LIMBAH B3 TEMPAT PEMROSESAN AKHIR (TPA) PT. X: PERENCANAAN DESAIN TEMPAT PENYIMPANAN SEMENTARA (TPS) LIMBAH B3 TEMPAT PEMROSESAN AKHIR (TPA) PT. X Wazna Auvaria, Shinfi; Muhammad Andi , Ramadhan; rhenny, ratnawati
Jurnal Teknologi Lingkungan Vol. 3 No. 2 (2025): Jurnal Teknologi Lingkungan
Publisher : Fakultas Teknik Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/jtl.v3i2.33346

Abstract

Hazardous Waste Management at PT. X is focused on the design of a Temporary Storage Facility (TSF) that complies with technical standards and regulatory requirements. The types of hazardous waste identified include used oil, used rags, grease, and hazardous waste packaging, all of which require special handling to prevent adverse impacts on human health and the environment. The objective of this study is to design a hazardous waste TPS at PT. X. The planning method refers to the Regulation of the Minister of Environment and Forestry (Permen LHK) No. 6 of 2021. Data were collected through interviews, observations, and logbook analysis to determine the characteristics, quantities, and sources of hazardous waste generation. Based on these data, a TPS design was developed with supporting facilities such as ventilation, fire extinguishers, first aid kits, and specific labeling according to waste characteristics. Hazardous waste is stored for a maximum of 90 days before being transported by an authorized third party, ensuring structured and environmentally sound management. The proposed TPS design measures 3 × 2 × 3 meters and is equipped with safety facilities, including ventilation, fire extinguishers, first aid kits, and labeling in accordance with waste characteristics. This design complies with regulations on maximum storage duration before transfer to a licensed third party. Therefore, the results of this study provide a TPS design that is not only spatially efficient but also ensures regulatory compliance, enhances occupational safety, and minimizes the potential risk of environmental pollution.
Evaluasi Pengelolaan Limbah Fly Ash dan Bottom Ash dari Proses Produksi Energi Listrik PLTU Pacitan Abidin, Minhajul; Auvaria, Shinfi Wazna; Ratnawati, Rhenny
Composite: Journal of Civil Engineering Vol. 4 No. 2 (2025): December 2025
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/cjce.v4i2.16210

Abstract

Konsumsi energi listrik yang meningkat mengakibatkan Pembangkit tenaga listrik yang didirikan semakin banyak. Pembangkit Listrik Tenaga Uap (PLTU) termasuk pemasok listrik terbesar yang menggunakan batu bara sebagai bahan bakar. Limbah yang dihasilkan akan berpotensi mengakibatkan terjadinya pencemaran lingkungan. Limbah yang dihasilkan berupa Fly Ash dan Bottom Ash (FABA). Pengelolaan limbah harus dilakukan berdasarkan regulasi yang berlaku. Tujuan penelitian ini adalah menganalisis pengelolaan FABA PLTU Pacitan dan membandingkan dengan peraturan. Metode penelitian ini menggunakan pendekatan deskriptif kualitatif. Data yang dibutuhkan berasal dari studi literatur, observasi lapangan, wawancara, dan dokumentasi. Hasil uji karakteristik ini menunjukkan terdapat parameter SiO2, Al2O3, Fe2O3, CaO, MgO, dan Na2O yang kurang memenuhi standar kualitas pozzolan. Namun pada Bottom Ash, SiO2 telah memenuhi standar. Proses pengelolaan limbah yang diterapkan dinilai telah memenuhi standar atau regulasi yang berlaku untuk mendukung kebijakan perlindungan dan pengelolaan lingkungan hidup.
Analisis Pembentukan Sludge Granular dari Lumpur Anaerobik Pengolahan Limbah di Effluent Treatment Plant PT XYZ Ratnawati, Rhenny; Agustin, Dewi; Auvaria, Shinfi Wazna; Arida, Vera
Jurnal Rekayasa Lingkungan Vol. 25 No. 2 (2025)
Publisher : Institut Teknologi Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37412/jrl.v25i2.395

Abstract

Limbah cair dari proses produksi minyak sawit mengandung bahan organik yang tinggi sehingga pengolahan yang tepat untuk menghilangkan bahan organik adalah dengan proses anaerobik. Di PT XYZ pada proses anaerobik digunakan beberapa jenis reaktor, diantaranya Upflow Anaerobic Sludge Blanket (UASB), Expanded Granular Sludge Blanket (EGSB), Internal Circulation (IC) Tank, dan Super Internal Circulation Tank. Bakteri yang digunakan umumnya berbentuk granular yang lebih cepat mengendap, tetapi pada kondisi lapangan bakteri yang digunakan untuk UASB adalah sludge powdering dimana cenderung washing out. Hal tersebut dapat menurunkan efisiensi pengolahan air limbah. Tujuan penelitian ini adalah menganalisis pembentukan sludge granular dari sludge powdering pada reaktor UASB. Metode yang digunakan adalah eksperimental menggunakan reaktor dari gelas beker dengan pengoperasian selama 6 minggu. Digunakan prinsip koagulasi flokulasi dengan penambahan urea 0,3 gr/L/hr sebagai nutrisi bagi bakteri dan FeCl3 sebagai bahan pengikat. Tahapan penelitian ini diantaranya pengambilan sampel, operasi reaktor, pengamatan, dan pemberian perlakuan kemudian analisis data. Hasil penelitian menunjukkan bahwa reaktor UASB tidak terbentuk sludge granular, karena sludge yang dihasilkan berbentuk flok halus. Penambahan bahan FeCl3 dan urea membuat nilai pH reaktor naik turun dan cenderung basa mengakibatkan terciptanya kondisi yang tidak optimal bagi aktivitas bakteri pembentuk granular. Sehingga belum didapatkan sludge granular dari percobaan menggunakan sludge powdering UASB dengan reaktor gelas beker.
EVALUASI KUALITATIF OPERASIONAL DAN PEMELIHARAAN INSTALASI PENGOLAHAN AIR LIMBAH (IPAL) DI RUMAH SAKIT X Sularto, Danang Juniztyo; Nilandita, Widya; Auvaria, Shinfi Wazna; Ratnawati, Rhenny
Jurnal Teknologi Lingkungan UNMUL Vol 9, No 2 (2025): Jurnal Teknologi Lingkungan UNMUL
Publisher : Mulawarman University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jtlunmul.v9i2.22469

Abstract

Rumah sakit menghasilkan limbah padat, cair, dan gas yang berpotensi mengandung mikroorganisme penyebab penyakit, bersifat infeksius, serta mengandung bahan kimia berbahaya maupun zat radioaktif dalam kadar kecil yang berdampak negatif terhadap kesehatan manusia dan lingkungan. Pengolahan limbah berperan penting dalam mengurangi sifat berbahaya serta memastikan kualitasnya sesuai standar sebelum dibuang ke lingkungan. Penelitian ini bertujuan mengevaluasi sistem operasional serta pemeliharaan Instalasi Pengolahan Air Limbah (IPAL) Rumah Sakit X, berdasarkan Buku 3 Pedoman SOP UPTD Pengelola Air Limbah Domestik Tahun 2018 dan Peraturan Gubernur Jawa Timur No. 72 Tahun 2013. Metode yang digunakan adalah dengan cara melakukan observasi, wawancara dengan pengawas operator dan juga melakukan dokumentasi unit pengolahan di IPAL. Hasil evaluasi menunjukkan bahwa sistem pengolahan limbah telah berjalan sesuai prosedur, di mana efisiensi penyisihan parameter pencemar untuk kadar BOD, COD, TSS, dan mikroorganisme patogen memenuhi baku mutu. Pengelolaan IPAL secara rutin dan pencatatan parameter harian juga telah dilakukan dengan baik. Kesimpulannya, hasil evaluasi menunjukkan bahwa tingkat kesesuaian operasional IPAL terhadap Peraturan Gubernur Jawa Timur Nomor 72 Tahun 2013 mencapai 100%. Berdasarkan dengan Buku 3 SOP Aset Operasi UPTD, tingkat kesesuaian operasional tercatat sebesar 93,3% dengan 28 dari 30 parameter terpenuhi, sedangkan tingkat kesesuaian pemeliharaan sebesar 89,65% dengan 26 dari 29 parameter terpenuhi.
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.
REDUCTION OF AMMONIA EMISSIONS FROM THE COMPOSTING OF SLAUGHTERHOUSE SOLID WASTE USING ZEOLITE Rhenny Ratnawati; Sugito Sugito
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 3, NUMBER 2, APRIL 2020
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v3i2.5795

Abstract

The process of aerobic composting the slaughterhouse (SH) solid waste generate ammonia emissions. Aim: The objective of this research to study the ability of the adsorbent to use zeolite to reduce ammonia gas emissions during the composting process of SH solid waste. Methodology and Results: Reduction of ammonia emission is conducted during the aerobic composting process which is 50 days. The raw material composition of the composting process used was 100% rumen contents, 60% rumen contents: 40% straw, 50% rumen contents: 50% straw, and 40% rumen contents: 60% straw. Zeolite used in the form of granular size 100 mesh. The result of the research showed that the level of release of ammonia gas emissions during the composting process could be reduced by zeolite. Conclusion, significance, and impact study: The efficiency of reducing ammonia gas emissions using zeolite adsorbents in the composting process of SH solid waste ranges from 98.09 - 99.40% on average. Zeolite is an adsorbent that has high adsorption power because it has many pores and has a high ion exchange high capacity and serves as an absorbent cation that can cause environmental pollution.
HYBRID ANAEROBIC BAFFLED REACTOR FOR REMOVAL OF BOD AND PHOSPHATE CONCENTRATION IN DOMESTIC WASTEWATER Sugito Sugito; Rhenny Ratnawati; Herlina Afiafani
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 5, NUMBER 1, OCTOBER 2021
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v5i1.10571

Abstract

Hybrid Anaerobic Baffled Reactor (HABR) is a development technology from the Anaerobic Baffled Reactor (ABR), which was already known as a technology that is successful in treating domestic waste. Aims: The objectives of these studies were to investigate the efficiency of reducing BOD and phosphate levels in HABR with zeolite (ZE) and activated carbon (AC) media. Methodology and Results: HABR reactor made of acrylic material with a size of 90 cm x 20 cm x 30 cm. The reactor designed has 7 compartments, with details the first 5 compartments are suspended growth microorganism reactors and the next 2 compartments are attached growth microorganism reactors. Conclusion, significance, and impact of study: The result of the research showed that the efficiency of reducing BOD concentration in the reactor with ZE and AC media were 59.30% and 65.12%, respectively. The final BOD concentration in the AC reactor is 30 mg/L, this value meets the domestic wastewater quality standard required by East Java Governor Regulation Number 72 of 2013 concerning Wastewater Quality Standards for Industry and/or Other Business Activities. The final BOD concentration in the ZE reactor exceeded the required quality standard with a value of 35 mg/L. The final phosphate levels of the two reactors meet the wastewater quality standards for business and/or laundry activities with a maximum phosphate concentration of 10 mg/L. The final phosphate levels in the ZE and AC reactors were 3.74 mg/L and 8.79 mg/L, respectively. The efficiency of phosphate removal in ZE and AC reactors were 70.58% and 30.87%, respectively.
BIOPLASTIC FROM TAPIOCA STARCH WASTE AND RICE WASTE Sri Widyastuti; Yitno Utomo; Annisa Firdayanti; Rhenny Ratnawati; Umi Solikah
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 7, NUMBER 1, APRIL 2024
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v7i1.18775

Abstract

Bioplastic is a plastic that is easily decomposed naturally by the activity of microorganisms without leaving toxic residues because of its that can return to nature. Aim: This study aim to examine the quality of bioplastics from variations of tapioca starch and rice waste raw materials for optimal composition. Methodology and Results: The method used is by mixing the raw material of tapioca starch waste and rice waste with variations in the composition of the material; 100% rice waste, 100% tapioca starch waste, 30% tapioca starch waste: 70% rice waste, 50% tapioca starch waste: 50% rice waste, 70% tapioca starch waste: 30% rice waste. Add 10 mL of glycerol, 30 mL of distilled water, 40 mL of acetate solvent, and 40 ml of 96% ethanol. The product will be tested on a laboratory scale for tensile strength, elongation at break, FTIR tests, and biodegradation according to SNI 7188.7:2016 for the bioplastic category that is easily biodegradable. The result shows that the optimal composition was found in the composition of 100% rice waste raw material with the quality of the tensile strength test results of 3,45 MPa, the value of elongation at break 3,8%, and the value of biodegradation 100%. The resulting bioplastics contain functional groups O-H (hydroxyl) bonded to hydrogen, C-H (alkanes), C≡C (alkynes), esters, simple aromatic compounds, C-O (carboxyl), C=C (alkenes), and hydrocarbons -(CH2)n. Conclusion, significance, and impact of study:  The use of starch to produce biodegradable materials is because it is environmentally friendly, easily degraded, available in large quantities, and affordable, moreover, the bioplastics derived from these waste sources are typically biodegradable, meaning they can break down into natural compounds under certain conditions, reducing environmental pollution.
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.
Co-Authors Abidin, Minhajul Achmad Chusnun Ni'am Agustin, Dewi Agustini, Elyana Ainiyah, Siti Irhayatul Annisa Firdayanti Annisa Rifka Alifia Annisa Rifka Alifia Aprilia Talarima Arif Rahman Nugroho Arson, Rudolfus Aulia Nur Febrianti Auvaria, Shinfi Wazna Bangun Wahyu Ramadhan Ika Hariyanto Putra Dano, Gita Hang Dian Majid Diana Evawati, Diana Diyana, Ulfatud F. Faizah Faizah, F. Farikh Akhsanul Hafidhin Fatmasari, Risna Dwi Febrioko, Dwi Herlina Afiafani Indah Nurhayati Irnawati Joko Sutrisno Joko Sutrisno Joko Sutrisno Khoiriyah, Shobah Fauzul Ula Kurniawan, Helminoufal Laba, Vinsensius Fereri Laksono Trisnantoro Latifah Mega Latifah, Nabila Fuadah M. Nushron Ali Mukhtar Mega Tri Yunita Moch. Shofwan Muhammad Al Kholif Muhammad Andi , Ramadhan Muhammad Ilham Habibi Muhammad Indra Ramadhan Muhammah Hilal Nur Anshori Nilandita, Widya Nur Rohim, Imam Nurmasyta Sylviana Priyono Permata Sari, Dinda Permatasari, Nidya Pungut Pungut Pungut Pungut Pungut Pungut, Pungut Purwanto Utomo, Hendra Putra, Firmanudin Yuga Rahayaan, Natalia Risna Dwi Fatmasari Rohim, Imam Nur Sakbanul Lailatul Ulfah Sari, Venny Yunita Sri Widyastuti Sugito SUGITO Sugito - Sugito Sugito Sularto, Danang Juniztyo Suning, Suning Susilowati Talarima, Aprilia Umi Solikah Vera Arida Wahid, Ahmad Wahyuni, Hasri Yitno Utomo Yohanita Anggraini, Viona Yoso Wiyarno Yoso Wiyarno Yulinah Trihadiningrum