ABSTRACT Chromium Hexavalent (Cr(VI)) is a type of waste that is carcinogenic and persistent in the environment. One method that can be used to remove Cr(VI) metal is the biosorption method, which utilizes microalgae immobilized with sodium alginate to achieve a stable structure. This study aims to obtain optimum conditions and empirical models for Cr(VI) removal and optical density using …
ABSTRACT Methylene blue synthetic dye is carcinogenic, toxic, and flammable so it needs to be processed before being discharged into the environment. In this study, methylene blue was processed by biosorption method using immobilized Chlorella sp. microalgae (Immobilized Microalgae Beads / IMB). This study aims to obtain the optimum variables and empirical model of IMB in the removal of me…
ABSTRACT Ammonia in wastewater can harm aquatic environments due to its toxicity, with LC50 values of 0.56–2.36 ppm for fish and 1.10–22.8 ppm for invertebrates within 24–96 hours of exposure. It contributes to eutrophication, microbial death, and reduced dissolved oxygen levels. Conventional are still limited, especially under high ammonia concentrations. Therefore, this study appli…
ABSTRACT Phenol is a toxic aromatic compound commonly found in industrial wastewater and has the potential to pollute aquatic environments. Treating phenol poses a challenge due to its resistance to biological degradation, high solubility in water, and its carcinogenic and bioaccumulative nature. Therefore, an effective and environmentally friendly treatment method is required. . One of th…
ABSTRACT Wastewater often contains pollutants such as ammonia, which can disrupt ecological balance. This study aimed to determine the optimum conditions, develop an empirical model, and characterize Immobilized Microalgal–Bacterial Beads (IMBB) for ammonia removal using Response Surface Methodology (RSM). The IMBB were formed by immobilizing microalgae Chlorella sp. and bacteria Nitros…
ABSTRACT The rise in traffic density in urban regions presents a threat of microplastic emission into the atmosphere. Road dust now contains microplastics, which are plastic particles that range in size from 0.001 to 5 mm. Due to their little weight and ease of airborne suspension, these particles have the potential to lower air quality and endanger human health. This study is to examine t…
ABSTRACT PKS. X in Tapung is one of the strategic business units in supporting the production of crude palm oil (CPO). One of its main operational units is the engine room station equipped with a Genset, Back Pressure Vessel (BPV), Turbine, and Main Panel. This unit produces noise levels that exceed the Threshold Limit Value (NAB) of 85 dB(A), thus risking hearing loss in workers. This stu…
ABSTRACT The management of cooperation activities at the Faculty of Engineering, Riau University was previously carried out using Google Spreadsheet or conventionally. In the process of collecting and distributing documents and document templates, it is still done using the WhatsApp application so that this process takes time and documents cannot always be obtained quickly. In addition, monito…
ABSTRACT Terephthalic acid is used as the main raw material for making polyester yarn fiber for the textile industry, as the main raw material for making "polyester chips" as a raw material for making polyester fiber which is useful for textile raw materials, tires, seatbelts, reinforcement and heat-resistant jackets, as polyester filament for polyester yarn raw materials, can be used as a…
ABSTRACT The internship management process at the Central Bureau of Statistics Riau Province faced various challenges, including costs and time for prospective participants, risks of physical document damage or loss, difficulties in monitoring internship slot availability, subjective intern performance evaluations, and inconsistent certificate formats. To address these issues, a web-based inte…
ABSTRACT The development of alternative energy sources is currently experiencing rapid growth, particularly in the development of solar power plants (SPPs) that convert solar energy into electricity. As the use of SPPs continues to expand, it is important to understand the factors that influence the efficiency of the system, including temperature fluctuations and partial shading caused by surr…
ABSTRACT This research analyzes the effect of azimuth angle variations on the performance of solar panels on the rooftop solar power generation system (PLTS) at the Faculty of Engineering Building, Riau University. The azimuthal angles tested were 160°, 170°, 180°, and 190° with a fixed tilt angle of 5°, using 4 x 100 Wp solar panels. Data were collected through direct measurements from 0…
ABSTRACT Transformers are an important asset whose health condition needs to be monitored regularly to maintain operational reliability and prevent potential failures. Therefore, regular monitoring and testing of transformer oil and paper insulation (furan) is necessary. This study aims to evaluate health index, estimate remaining life, and detect potential transformer failures. The data param…
ABSTRACT Radar is a vital technology in monitoring and security systems, especially in archipelagic countries like Indonesia. One of its key components is the antenna, which functions to receive and transmit electromagnetic signals. Microstrip antennas are selected for their compact size, efficiency, and ease of integration. This study designs microstrip MIMO array antennas with 2×2, 4×4, 8�…
ABSTRACT Slope stability is essential in ensuring the safety of residential areas, especially in regions with unstable soil conditions. This study aims to design gravity and cantilever type retaining walls as an effort to prevent soil instability at the Derofizha Permata Indrapuri Housing site in Pekanbaru. The methods used include field surveys, collection of soil parameter data, manual c…
ABSTRACT The research aims to analyze the stability of the slope at the Derofizha Permata Indrapuri Pekanbaru Housing site to obtain the Safety Factor value, The safety factor is an important consideration in the stability of slopes or embankments. The stability of a slope is a crucial factor in work that involves excavation, earthworkers, rocks, and mineral materials. The results of this …
The design of pile foundations requires accuracy in determining the soil bearing capacity in accordance with field conditions. This research was conducted to compare the bearing capacity of single pile foundations based on two types of data: Cone Penetration Test (CPT) results and laboratory soil test data. The study was carried out in the Indrapuri Housing area, Pekanbaru City. The analysis me…
ABSTRACT A slope is a land surface that makes a certain angle to the horizontal plane, causing a slope. Slopes that have a crucial slope need to be analyzed for slope stability. The purpose of this study, is a comparative analysis of the slope safety factor between the limit equilibrium method (Limite Equilibrium Method) and the finite element method (Finite Element Method) in terms of the…
ABSTRACT Erosion can reduce the capacity of water channels. So to overcome the problem of erosion in river channels, a river bank protection structure is needed. Therefore, in this study, analyzing the capacity of the river cross-section. This study aims to determine the flow rate of the Kampar River, the depth of the Kampar River in order to determine the river discharge after the constructio…
ABSTRACT This research aims to develop an intelligent system capable of detecting and repelling wild boar pests in plantations. Wild boars are known as agricultural crop destroyers, often causing significant losses for farmers in Indonesia, especially in areas close to forests and mountains. With the increasing need to protect crops such as corn, bananas, and coffee, technology emerges as a cr…