ARRUS Journal of Engineering and Technology

Performance Evaluation of an Anaerobic-Aerobic Biofilter in the Wastewater Treatment System of a Mortuary Facility

2025-12-01T19:37:23+08:00

Mortuary facilities generate wastewater with elevated concentrations of organic matter, suspended solids, oils and grease, ammonia, and microbial contaminants, necessitating effective treatment to mitigate environmental and public health risks. This study evaluates the performance of an anaerobic–aerobic biofilter wastewater treatment plant (WWTP) serving a mortuary facility in Makassar City. Wastewater samples were collected at the influent and effluent points of the system during July and August 2025 and analyzed for BOD₅, COD, TSS, oil and grease, NH₃–N, and total coliforms. The influent wastewater exhibited high pollutant loads (e.g., BOD₅: 58.1–58.4 mg/L; COD: 139.50–140.33 mg/L; TSS: 63.2–64.9 mg/L; NH₃–N: 13.42–13.94 mg/L; coliforms: 9532–9541 CFU/100 mL). Treatment by the biofilter consistently reduced these contaminants, producing effluent concentrations within applicable national standards. Removal efficiencies in July ranged from 45.56–67.81%, while efficiencies in August ranged from 52.11–70.03% for physicochemical parameters. Microbial removal was also effective, achieving 75.55% and 77.58% reduction in July and August, respectively. These findings demonstrate that the anaerobic–aerobic biofilter performs reliably under routine operating conditions, effectively reducing organic pollutants, suspended solids, oils and grease, ammonia, and total coliforms in mortuary wastewater. The system provides compliant effluent quality without additional treatment stages, indicating its suitability for managing medium-strength, high-organic-load wastewater generated by mortuary activities.

Design Of An Educational Game For Introducing Flat Shapes To 4th Grade Elementary Students At Sdn Temugiring Using Construct 2

2025-12-01T19:37:23+08:00

This study aims to design and develop an educational game that serves as an interactive learning medium to introduce the concept of flat shapes to fourth-grade students at SDN Temugiring. In elementary school mathematics, especially on the topic of flat shapes, many students still face difficulties in understanding the forms and characteristics of each shape. Therefore, the use of interactive learning media in the form of educational games is expected to provide a more enjoyable and engaging learning experience for students. The development of this game follows the Multimedia Development Life Cycle (MDLC) method, which consists of several stages: concept formulation, design, material collection, production, testing, and distribution. The game application was developed using Construct 2, as this platform offers an easy-to-understand interface and supports the development of 2D-based games. The results of the study show that this educational game successfully enhances students’ understanding of flat shape material and positively impacts their learning motivation in the classroom.

Development Of An Educational Game For Introducing Indonesian Traditional Musical Instruments Using Construct 2 At Sdn Patra Manggala 2, Tangerang Regency

2025-12-01T19:37:23+08:00

The rapid development of information technology can be utilized as an engaging and interactive learning medium, especially for elementary school students. One effective way to introduce Indonesian culture from an early age is through digital media that presents traditional musical instruments. This study aims to develop an educational game using Construct 2 as an interactive learning medium to introduce various types of Indonesian traditional musical instruments to fourth-grade students at SDN Patra Manggala 2, Tangerang Regency. The research method used is Research and Development (R&D) with the ADDIE development model (Analysis, Design, Development, Implementation, Evaluation). The analysis stage is conducted to identify the needs of students and teachers, while the design and development stages are used to design and build the educational game. Subsequently, the implementation and evaluation stages are carried out to test the feasibility and effectiveness of the game in the learning process. The test results show that the developed game is rated as "highly feasible" based on validation from media and content experts, and received positive responses from both students and teachers. This game not only provides knowledge about traditional musical instruments but also enhances students' learning motivation through enjoyable visual, audio, and interactive approaches. Therefore, this Construct 2-based educational game can serve as an effective and engaging alternative learning medium to introduce Indonesian culture to elementary school students.

Reservoir Characterization of the Hugin Formation, Volve Field Norway, Using Integrated Seismic Inversion and Multiattribute Analysis Based on a Probabilistic Neural Network (PNN)

2025-12-02T18:56:52+08:00

Akuisisi seismik 3D di Lapangan Volve, yang terletak di Cekungan Laut Utara, Norwegia, dilakukan untuk mengeksplorasi potensi hidrokarbon Formasi Hugin, yang diendapkan selama era Mesozoikum. Dataset yang dianalisis terdiri dari data seismik migrasi waktu pasca-tumpukan 3D dan data log sumur (sonik, densitas, dan porositas) untuk mendukung proses interpretasi. Penelitian ini bertujuan untuk mengkarakterisasi zona reservoir melalui integrasi inversi seismik Impedansi Akustik (AI) dan analisis multiatribut menggunakan metode Jaringan Syaraf Tiruan Probabilistik (PNN). Inversi seismik digunakan untuk menghasilkan penampang AI yang merepresentasikan variasi sifat fisik batuan, sementara analisis multiatribut berbasis PNN digunakan untuk memprediksi distribusi log porositas dari data seismik secara nonlinier. Hasil penelitian menunjukkan bahwa reservoir batupasir di dalam Formasi Hugin memiliki nilai AI berkisar antara 7000 hingga 8000 (g/cc·m/s) dan nilai porositas antara 0,15 hingga 0,30 (v/v). Integrasi kedua metode ini terbukti efektif dalam meningkatkan resolusi karakterisasi reservoir dan mendelineasi zona prospek hidrokarbon di Lapangan Volve.

Kata kunci: Formasi Hugin, inversi impedansi akustik, karakterisasi reservoir, jaringan saraf probabilistik, refleksi seismik.

Development of a Menu Introduction Application for Domino's Pizza Serang Using Construct 2

2025-12-01T19:37:23+08:00

The development of information technology has had a significant impact on various aspects of life, including the culinary field. Domino’s Pizza, as one of the international fast-food restaurant franchises, offers a wide variety of menu items that need to be introduced effectively to customers. However, the menu introduction media used so far is still conventional, such as brochures and verbal explanations, which are considered less engaging and interactive. This study aims to develop a menu introduction application for Domino’s Pizza Serang using Construct 2 as an interactive multimedia-based tool. The development method used in this study is the Multimedia Development Life Cycle (MDLC), which consists of the stages: concept, design, material collecting, assembly, testing, and distribution. The application includes several main features, such as the main menu, menu list, and company profile. Application testing was conducted by distributing questionnaires to 10 respondents using the Likert scale. The evaluation results showed that the application received an average user satisfaction score of 4.29 out of 5, indicating that the application is considered good and suitable for use as a promotional and product information medium. Therefore, this application can be an effective solution in introducing Domino’s Pizza products in an engaging and efficient manner.

Green Feed Innovation with Goat Milk Yogurt Casein to Mitigate Dioxin Accumulation in Nile Tilapia

2025-12-02T13:12:27+08:00

Dioxins are toxic and persistent organochlorine pollutants that bioaccumulate in fish tissues, posing health risks to consumers. This study evaluated the potential of casein isolated from goat milk yogurt as a bioprotective agent to reduce dioxin bioaccumulation in Nile tilapia (Oreochromis sp.). A Completely Randomized Design (CRD) was employed with three groups: a negative control (no exposure), a positive control (dioxin exposure), and a therapy group (dioxin exposure plus dietary casein supplementation). Fish were maintained for 30 days, consisting of 15 days of dioxin exposure followed by 15 days of casein therapy. Survival rate was highest in the negative control (100%), intermediate in the therapy group (67%), and lowest in the positive control (17%). Gas Chromatography–Mass Spectrometry (GC–MS) analysis showed that casein supplementation reduced dioxin concentration in muscle tissue threefold compared with the positive control (0.02% vs. 0.06%; p < 0.001). Histopathological analysis further indicated that casein attenuated hepatic damage, with a lower damage score in the therapy group (10) compared to the positive control (16). These findings suggest that casein from goat milk yogurt has potential as a functional feed ingredient to suppress dioxin accumulation and mitigate toxic effects in fish, although full physiological recovery was not achieved.