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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Al-Ard: Jurnal Teknik Lingkungan Journal of Natural Sciences Envirous Jurnal Teknik Informatika dan Elektro (JURTIE) Jurnal Sains dan Teknologi Jurnal Indonesia Sosial Teknologi Lingkar : Journal of Environmental Engineering Serambi Engineering
Rachmanto, Tuhu Agung
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Veterinary

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Journal : Serambi Engineering

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Pemanfaatan Eco-Enzyme sebagai Koagulan dan Pupuk Ramah Lingkungan Arianti, Miranda Putri; Rachmanto, Tuhu Agung
Jurnal Serambi Engineering Vol. 10 No. 1 (2025): Januari 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Environmental issues related to waste management and the need for sustainable agriculture have driven the search for eco-friendly alternatives. This study explores the utilization of eco-enzyme as a coagulant and organic fertilizer. Eco-enzyme, produced through fruit peel fermentation, was tested for its effectiveness in particle sedimentation in wastewater and enhancing soil fertility. The research employed an experimental approach, using jar test for coagulation and applying eco-enzyme as a liquid fertilizer on plants. Results indicate that eco-enzyme is less effective as a coagulant due to an increase in Total Suspended Solids (TSS) and water turbidity. However, eco-enzyme made from dragon fruit peel (U3) met the liquid organic fertilizer standards with appropriate C, N, P, and K levels, significantly improving soil fertility and plant growth. In conclusion, eco-enzyme has potential as an eco-friendly organic fertilizer but is less effective in coagulation functions.
Analisis Tingkat Kebisingan Menggunakan Model Calculated of Road Traffic Noise di Area UPN “Veteran” Jawa Timur Dinayah, Ignacia Putri; Rachmanto, Tuhu Agung
Jurnal Serambi Engineering Vol. 10 No. 2 (2025): April 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Each year, universities enroll new students, which increases the use of motorized vehicles. An increase in the number of motorized vehicle users can cause noise impacts around the learning area, which can disrupt the learning process. The data needed is vehicle volume, vehicle speed, and road specifications. The collected data are then processed using the CoRTN model to obtain the noise level. The research was conducted at UPN "Veteran" East Java with 4 locations in the morning, afternoon and evening. Based on the results obtained, the peak of vehicle volume occurred in the afternoon with 14,763 vehicles at point 1, the highest vehicle speed occurred at 12.30 WIB at points 1 and 2 with 15 Km/hour, the highest noise occurred in the afternoon at point 2, namely 84 dB(A), and the noise with the lowest intensity occurred in the afternoon at point 4 with 62 dB(A). The noise level prediction results indicate that the noise exceeds the quality standard. Noise is affected by vehicle volume and vehicle speed. However, the vehicle volume affects the vehicle speed. The larger roads but low volume, vehicle speed will increase. However, if the volume is high, the vehicle speed will decrease. The statistics show that the model is good enough to explain the influence of vehicle volume and vehicle speed on noise.
Kombinasi Proses Anoxide – Oxide Menggunakan Tanaman Kayu Apu (Pistia Stratiotes) untuk Penyisihan COD dan Total Nitrogen Pada Limbah Cair Domestik Ningrum, Aprilia Putri; Rachmanto, Tuhu Agung
Jurnal Serambi Engineering Vol. 10 No. 3 (2025): Juli 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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The increase in population and urbanisation has led to to an increased volume of domestic wastewater containing pollutants such as organic matter and nitrogen, which pose a significant risk to the environment and aquatic ecosystems. This study aims to evaluate the effectiveness of a combined anoxic–oxic process integrated with Pistia stratiotes (water lettuce). constructed wetland system for removing Chemical Oxygen Demand (COD) and total nitrogen from domestic wastewater. The experiment was conducted using wastewater concentrations of 20%, 40% and 60%, with a retention time of five days. The system operated under anoxic conditions for the first two days, This was followed by oxic conditions with aeration from days three to five. The Results showed that the highest removal efficiency was achieved at a wastewater concentration of 20%. wastewater concentration and a five-day retention time. This resulted in COD and total nitrogen removal efficiencies of 63.16% and 70%, respectively. These findings suggest that the anoxic–oxic system combined with Pistia stratiotes is effective in enhancing the treatment performance of domestic wastewater. This is particularly evident at lower concentrations and optimal retention times.
Pemantauan Parameter Fisik dan Aktivitas Mikroorganisme Aerob di Unit Oxidation Ditch Instalasi Pengolahan Lumpur Tinja Setia Wati, Syaharani; Rachmanto, Tuhu Agung
Jurnal Serambi Engineering Vol. 10 No. 3 (2025): Juli 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Oxidation ditch is one of the widely used biological sewage treatment systems to treat fecal sludge by means of continuous aeration. This system relies on the activity of aerobic microorganisms, which require dissolved oxygen to break down organic compounds in wastewater effectively and sustainably. This study aims to monitor three important parameters in the oxidation ditch unit at the Instalasi Pengolahan Lumpur Tinja (IPLT), namely Dissolved Oxygen (DO), temperature, and Sludge Volume 30 minutes (SV30). DO and temperature measurements are carried out routinely to ensure that environmental conditions continue to support the biological process in the aeration channel optimally. Meanwhile, the SV30 value is used to evaluate the effectiveness of activated sludge precipitation formed during the treatment process. Observations show that fluctuations in DO and temperature affect the performance of the treatment system, while the SV30 value reflects the sludge quality and overall process stability. Monitoring these three parameters is important to maintain the efficiency, reliability and sustainability of the overall domestic effluent treatment process.
Pengaruh Desain Impeller terhadap Perilaku Hidrodinamika dan Efisiensi Penyisihan TSS serta Kekeruhan pada Proses Koagulasi Flokulasi Maharani, Cahya Nova Putri; Rachmanto, Tuhu Agung
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Domestic wastewater pollution remains a significant environmental issue in Indonesia, characterized by high levels of Total Suspended Solids (TSS) and turbidity that exceed quality standards. One of the effective treatment methods is the coagulation flocculation process, which involves the addition of chemical coagulants, such as Poly Aluminium Chloride (PAC). This study aims to analyze the influence of hydrodynamic variables, including the presence of baffles, impeller types (paddle, turbine, and propeller), and impeller installation height, on flow patterns, floc formation, and the removal efficiency of TSS and turbidity. Experiments were conducted using a laboratory scale tank with impeller positions varied at 30–50% of the impeller diameter from the bottom of the tank. The results showed that the flow pattern within the tank was significantly affected by the impeller design and installation height, while the presence of baffles with small dimensions tended to accelerate floc breakage. The optimum condition was achieved using a turbine with four flat blades and a vaned disc, installed at a height of 3.0 cm from the tank bottom without baffles, resulting in TSS and turbidity removal efficiencies of up to 91.67% and 83.27%, respectively. This study highlights the critical role of hydrodynamic variables in enhancing the effectiveness of the coagulation flocculation process for domestic wastewater treatment.
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.
Co-Authors Annidya, Putri Azmi Arianti, Miranda Putri Arohmah, Nicken Elok Aulia Ulfah Farahdiba Aussie Amalia Dinayah, Ignacia Putri Hendrata Wibisana Indrawanto, Mochammad Shaifullah Juliardi A.R, Naniek Ratni Maharani, Cahya Nova Putri Mufida, Yuni Imroatul Murti, Restu Hikmah Ayu Nanda Henik Pratiwi Ningrum, Aprilia Putri Novembrianto, Rizka Nurbaiti, Geafiata Amalia Nurkomariyah, Safitri Okik Hendriyanto Cahyonugroho Pandriratri, Purnasari Pramesti, Thineza Ardhea Pratama Putri, Esha Nurrahmania Prawardani, Salsabila Purnamasari, Syafta Indah Purnomo, Yayok Suryo Putra Pratama, Rizaldi Rafsanjani, Lintang Putri Romanda, Yoga Rosariawari, Firra Rositasari, Putri Redita Safitri Nurkomariyah Salamah, Umi Hafilda Sasdika, Azzahra Hanggararas Setia Wati, Syaharani Soobirumbassa, M. Yureico Suhada, Aisyah Ramadhanti Sulistyaningsih, Angger Yayok Suryo Purnomo