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Wastewater monitoring system in the textile industry Raditya, Murry; Pratama, I Putu Eka Widya; Bagastyo, Arseto Yekti; Nurhayati, Ervin; Kalahari, Bintang
Bulletin of Electrical Engineering and Informatics Vol 13, No 5: October 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v13i5.7220

Abstract

Recently, a problem which often experienced by the Environmental Agency is to monitor the quality of industrial waste. The problem comes from manual monitoring of wastewater and the high cost of laboratory tests for each variable for the waste. This system is intended to develop a wastewater monitoring system considering the state of the environment and technology. This system uses 5 types of sensors to measure the quality of wastewater. The sensor will display measurement data both offline via liquid crystal display (LCD) and online via the website. For the pH sensor test, we obtained an error value approximately of 1.32% and accuracy of 98.68%. For the oxidation reduction potential (ORP) sensor test, we obtained an error value of 1.4% with 98.6% accuracy. We obtained an error value of 0.22% with 99.78% accuracy for the temperature sensor test. For the total dissolved solid (TDS) sensor test, we obtained an error value of 1.02% with 98.98% accuracy. The color sensor is validated using a spectrometer to measure the variation of color in remazol waste concentration. For the Client - Server communication test, the system has a delay of 2 seconds. One of the advantages of using a web server is the system has minimum network traffic.
PENTINGNYA PEMULIHAN URINE DARI AIR LIMBAH PERKOTAAN Bagastyo, Arseto Yekti; Anggrainy, Anita Dwi; Fatkhasari, Yasokhi; Noviani, Riskha
Purifikasi Vol 21 No 2 (2022): 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/j25983806.v21.i2.439

Abstract

Urine contains a high concentration of nutrients that could increase water pollution and corrosion in the sewerage system. Along with the decrease in global phosphorus reserves, this condition may aggravate the worldwide population’s vulnerability in food security, drinking water, sanitation, and hygiene. This paper aims to gain more knowledge on the importance of urine recovery from municipal wastewater. The previous implementation of the urine separation system, the importance of urine diversion, the potential product, and technologies for urine recovery was briefly described. Overall, urine diversion is expected to address those environmental problems by reducing water pollution and organic loading in wastewater treatment plants, providing valuable nutrients for agricultural production, and lessening the economic cost of improper sanitation.
Effect of ammonium/phosphate molar ratio on struvite production via electrolysis using a sacrificial magnesium anode Pangestu, Aditya Kurnia Aji; Bagastyo, Arseto Yekti; Nurhayati, Ervin; Lin, Jr-Lin; Sidik, Fahrudin
Sustinere: Journal of Environment and Sustainability Vol. 9 No. 1 (2025): pp. 1-127
Publisher : Center for Science and Technology, IAIN Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22515/sustinere.jes.v9i1.473

Abstract

Excessive ammonium and phosphate levels in aquatic environments potentially cause eutrophication, leading to water quality imbalance, algal blooming, and disturbance of biodiversity status. Electrolysis using a sacrificial magnesium anode effectively removes and recovers ammonium and phosphate, producing struvite (MgNH4PO4.6H2O). The present study investigated the optimum current density and the effect of the ammonium/phosphate molar ratio on struvite production. The current density was controlled at 10, 50, and 100 mA/cm2. An artificial wastewater containing [NH4+]:[PO43-] in a molar ratio of 1:10, 1:1, and 10:1 was used as the test solution. The optimum current density was determined as 50 mA/cm2. The ammonium and phosphate reduction ratios at a 1:1 molar ratio was approximately 46.91% and 74.26%, respectively. Increasing the ammonium molarity in the test solution to 10:1 increased the phosphate reduction ratio to 96.38% while decreasing the ammonium reduction ratio to 26.28%. The maximum precipitation of 4.1914 g was generated at a molar ratio of 10:1 with a specific energy consumption of 0.011 Wh/mg-P, out of the three ammonium/phosphate molar ratio variations. Microscopes and SEM-EDS were used to characterize the precipitates produced, and Visual MINTEQ 3.1 was then used for modeling.
Analisis Aliran Material Limbah Domestik di Pembangkit Listrik Tenaga Batubara Wicaksono, Aris Dwi; Bagastyo, Arseto Yekti
Jurnal Serambi Engineering Vol. 10 No. 3 (2025): Juli 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

This study evaluates the zero waste strategy for managing domestic solid waste within the operational environment of a large-scale coal-fired power plant (CFPP) in East Java. The Material Flow Analysis (MFA) method, which uses STAN 2.7.101 software, was employed to map waste flows and evaluate the potential for recovery. Data were collected through field observations, representative sampling and laboratory analysis, including proximate and ultimate testing. The results show that organic waste, such as leaves, food scraps and fruit peels, accounted for over 85 per cent of total waste generation. With recovery factors (RF) exceeding 70 per cent, this supports composting and maggot-based biodegradation. In contrast, inorganic waste, such as plastics and used pipes, had lower RF values ranging from 15 to 45 per cent. MFA modelling estimated that 25–30% of the total waste would remain as residue to be sent to landfill. This study emphasises the importance of reducing and recovering waste upstream to minimise final disposal. The study's originality lies in its systemic focus on domestic waste within an energy industry infrastructure, using MFA and RF as a robust basis for adaptive, sustainable waste management strategies.
PLASTIC PARTICLE CONTAMINATION IN SUBSTRATE AND FRASS OF BLACK SOLDIER FLY LARVAE CULTIVATION IN COMMUNITY SOLID WASTE RECYCLING CENTERS Octavia, Lusya Sevyana; Bagastyo, Arseto Yekti; Trihadiningrum, Yulinah
Purifikasi Vol 24 No 1 (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.v24i1.487

Abstract

Bioconversion of solid waste (SW) by black soldier fly (BSF) is a promising sustainable SW treatment approach. However, insufficient segregation may lead to plastic contamination in BSF larvae (BSFL) substrates, compromising the quality of BSFL-derived products and potentially introducing plastic particles into the food chain. This study aimed to investigate plastic abundance in SW from different sources and determine abundance of plastic particles in BSFL substrates and frass. The research was conducted at the Jambangan Recycling Center (JRC) and the Wonorejo Composting Center (WCC) in Surabaya, Indonesia. The results showed that 74% of SW at JRC was suitable for BSFL substrate, while only 36.62% of SW can be used in WCC. The amount of plastic abundance in the BSFL substrate in JRC and WCC were 2.28% and 7.63%, respectively. At JRC, 12 macroplastic (MaP), 9 mesoplastic (MeP), and 334 microplastic (MP) particles were detected per kilogram dry-weight (DW) of BSFL substrate, whereas 250 MP particles were found in frass. The insufficient SW segregation at the WCC has led to an abundance of plastic particles per kilogram DW of BSFL substrate (i.e., 40 MaP, 35 MeP, and 734 MP particles) and frass (484 MP particles). Plastic transparent films were mostly found in both substrates and frass. The size of MaPs typically ranged from 2.5 to 10 cm, while MPs predominantly fell within the 1 µm to 1 mm range. These findings highlight the importance of source segregation to reduce plastic contamination and enhance the efficiency and safety of BSF bioconversion process.
Potensi Pengolahan Sampah Domestik Kota Sawahlunto Menjadi Refuse Derived Fuel (RDF) Rusyadi, Mughni Alvin; Bagastyo, Arseto Yekti; Goembira, Fadjar
Dampak Vol. 22 No. 2 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.22.2.42-49.2025

Abstract

Peningkatan timbulan sampah seiring dengan pertumbuhan populasi dan konsumsi masyarakat menimbulkan tantangan besar dalam pengelolaannya, terutama di tengah meningkatnya kebutuhan energi. Upaya menghadapi tantangan tersebut dapat dilakukan dengan pengembangan energi terbarukan di Indonesia. Sumber energi yang belum banyak dimanfaatkan oleh masyarakat adalah energi yang berasal dari biomassa seperti sampah (waste to energy). Refuse Derived Fuel (RDF) menjadi salah satu alternatif yang dapat digunakan untuk menanggulangi permasalahan peningkatan timbulan sampah dan peningkatan kebutuhan energi. Penelitian bertujuan untuk menganalisis potensi pengolahan sampah domestik Kota Sawahlunto menjadi RDF berdasarkan kelayakan aspek teknis dan nonteknis, serta memberikan rekomendasi strategi pengelolaannya. Data menunjukkan timbulan sampah domestic Kota Sawahlunto sebesar 1,24 kg/orang/hari dengan densitas 3,07 L/orang/hari. Komposisi dari sampah domestik yang dihasilkan berturut-turut adalah sampah sisa makanan sebesar 42,12%; sampah plastik 26,37%; sampah kertas 18,69%; sampah kayu/daun 6,93%; residu 3,11%; sampah tekstil 2,21%; dan sampah karet/kulit 0,57%. Analisis karakteristik sampah domestik sebagai bahan baku RDF mengungkapkan: kadar air (10,66%), zat mudah menguap (32,26%), kadar abu (4,98%), dan nilai kalor (16,74 MJ/kg). Hasil analisis ini memenuhi persyaratan teknis SNI 8966:2021 sebagai bahan baku RDF, kecuali pada beberapa komponen yang memerlukan pretreatment.   Kata Kunci: RDF, Kota Sawahlunto, sampah domestik, energi
Feeding Frequency and Amino Acid Effects on Black Soldier Fly Larvae Performance Ursada, Riang; Bagastyo, Arseto Yekti; Radita, Deqi Rizkivia; La’ali, Anisah Zahira
Jurnal Serambi Engineering Vol. 10 No. 3 (2025): Juli 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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

Abstract

The continuous increase in waste generation, driven by population growth, necessitates sustainable waste management solutions. One promising approach is the bioconversion of organic waste using Black Soldier Fly (BSF) larvae, which naturally accelerate the decomposition process. This study investigates the effect of amino acid supplementation and feeding frequency on BSF larval growth, nutrient composition (protein, fat, carbohydrate, moisture, ash), waste reduction, and cultivation efficiency. A total of 700 five-day-old larvae were fed 1.8 g/larva/day using a mixture of restaurant and market waste. Results showed that the addition of 15 mL amino acids did not significantly enhance larval growth, except in fresh waste with a 70:30 ratio over three days, where larvae reached 27 g at 17 days old. Nutrient content varied with waste composition, while feeding frequency had minimal influence. The highest values recorded were moisture (72%) in fresh P100 (1-day feeding), ash (26.29%) in fresh R100 (1-day), protein (46.97%) in fresh 70:30 (3-day), fat (45.11%) in landfill 70:30 (3-day), and carbohydrate (0.15%) in landfill waste. Amino acid addition contributed to increased protein content. Feeding frequency impacted the Waste Reduction Index (WRI), waste reduction rate, and frass C/N ratio. The highest WRI (5.27%) and reduction rate (94.90%) were observed in fresh P100 (1-day feeding), with frass C/N ratios ranging from 13.09 to 28.82. These findings highlight the potential of optimizing feed composition and frequency for enhanced BSF-based organic waste bioconversion.