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Journal Majelis Paspama
Published by Paspama Institute
ISSN : -     EISSN : 29871379     DOI : https://doi.org/10.58471
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Journal Majelis Paspama The following journals that receive a multidisciplinary research focus with a Scope of Engineering accept submissions of scientific articles for research in the form of research results, surveys, and literature in the fields of engineering, including: Informatics Engineering, Electrical engineering, Civil engineering, Architecture, Chemical engineering, Industrial engineering, Mechanical engineerin
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 52 Documents
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Sustainable Profitability Analysis of Natural Gas-Based Methanol Production Onuoha Fidelis Wopara; Nnadikwe Johnson
Journal Majelis Paspama Vol. 4 No. 02 (2026): Journal Majelis Paspama, 2026
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Methanol production from natural gas is gaining traction as a sustainable alternative to conventional fuels. This paper presents an economic analysis and design of large-scale methanol production, optimizing synthesis gas composition (CO/CO₂ ratio) for enhanced yield. A Maximum Energy Recovery (MER) heat exchanger network reduces operational costs, achieving a break-even point of 2.69 years. Key results include: production capacity meeting ~1% of global demand, total operating cost optimized at 4× raw materials cost, and a fixed-tube sheet heat exchanger (22.54 m²) selected for low-temperature heat exchange. Sensitivity analyses demonstrate robustness against natural gas price fluctuations and methanol market trends, underscoring the process's economic viability and environmental sustainability.
Efficient Propane-Ethane Fractionation within Petrochemical Plant Operations Nnadikwe Johnson; Onuoha Fidelis Wopara
Journal Majelis Paspama Vol. 4 No. 02 (2026): Journal Majelis Paspama, 2026
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Efficient propane-ethane fractionation is crucial in petrochemical complexes, enabling the production of high-purity products. This paper focuses on the treatment of ethane-propane mixtures recovered from natural gas, highlighting the interplay between key units: Gas Sweetening Unit (GSU), C2/C3 Recovery Unit, and Gas Cracker Unit (GCU). In the GSU, acid gases like CO2 are removed via chemical absorption using solvents like DEA, preventing freezing issues in downstream cryogenic processes. The 'sweetened' gas feeds into the C2/C3 Recovery Unit, where cryogenic conditions enable efficient ethane-propane separation. Optimizing fractionation in this unit enhances GCU performance, boosting ethylene and propylene yields. Process integration and energy efficiency are critical considerations. This study explores efficient propane-ethane fractionation strategies, aiming to improve overall petrochemical complex performance. Key aspects of this process include effective CO2 removal in the GSU, ensuring process reliability. Cryogenic separation in the C2/C3 Recovery Unit enables high-purity product recovery. The impact on GCU performance is significant, as efficient fractionation boosts downstream yields. Energy-efficient fractionation strategies are also crucial for reducing operating costs and environmental impact. By optimizing these aspects, petrochemical complexes can improve product yields, reduce energy consumption, and enhance overall efficiency. This research contributes to the development of efficient propane-ethane fractionation technologies, supporting the growth of the petrochemical industry.
Design and Construction of a Biogas Digester for Producing Methane from Cow Dung Nnadikwe Johnson; Khama Rieborue Emmanue; IKputu Woyengikuro Hilary; Amaefule Chibunma Vivian
Journal Majelis Paspama Vol. 4 No. 02 (2026): Journal Majelis Paspama, 2026
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The increasing demand for renewable energy and the need for sustainable waste management necessitated this study on the design and construction of a biogas digester for producing methane from cow dung. The objectives were to design a mini floating-drum biogas digester, construct and operate the system using cow dung as substrate, evaluate its performance based on biogas volume and methane content, and assess the digested slurry as organic fertilizer. The digester was constructed using locally available materials and consisted of a digestion chamber, inlet and outlet pipes, a water-jacket seal, and an inverted floating drum as gas holder. The system was charged with cow dung slurry mixed at a 1:1 ratio with water and operated under ambient conditions for a retention period of 30 days. Results showed that biogas production commenced on day 3 and reached a peak between day 14 and day 18. A total cumulative biogas yield of 1.26 m³ was recorded, with an average daily production of 0.042 m³. Gas analysis revealed a methane content of 61.4%, carbon dioxide 34.8%, and trace amounts of hydrogen sulfide, hydrogen, nitrogen, oxygen, and water vapor. The methane content was sufficient for combustion, confirming the biogas as methane-rich. The digested slurry obtained was odorless and suitable for use as organic fertilizer. The study concluded that the floating-drum biogas digester is effective for converting cow dung to methane and organic fertilizer under local conditions. The design is simple, cost-effective, and can be adopted by small-scale farms and households for waste management and renewable energy generation. It is recommended that further work focus on gas purification and scale-up for community use.
Implementation of the Phase Coding Steganography Method for Embedding Secret Messages in Audio Media Daniel S. Simbolon; Daniel Adrian Sirait; Stephen Gilbert R. Gulo
Journal Majelis Paspama Vol. 2 No. 2 (2024): Journal Majelis Paspama, July 2024
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The development of information technology has driven an increasing need for data security, particularly in the transmission of secret messages through digital media. One technique that can be used to maintain information confidentiality is steganography, which is the method of hiding messages within other media without causing noticeable changes. This study aims to implement the Phase Coding steganography method for embedding secret messages into digital audio media, so that the message is not easily detected by unauthorized parties. The Phase Coding method works by modifying the phase of the audio signal without significantly altering its amplitude, thereby maintaining audio quality and making it difficult to distinguish from the original audio by human hearing. In this study, the process includes preparing the audio file as a cover, converting the secret message into binary form, embedding the message using the Phase Coding technique, and extracting the hidden message. The implementation is carried out using a programming language to test the success of both embedding and retrieving the message. The results show that the Phase Coding method is capable of embedding secret messages into audio media with good performance without significantly degrading audio quality. The secret message can also be accurately extracted and recovered in its original form. Therefore, the Phase Coding steganography method can be considered an effective solution for securing information in audio-based media.
Studies on the Compressive Behaviour of Aluminum–Zircon composites Oluwaseyi Omotayo Taiwo; Abraham Kehinde Aworinde; Kenechukwu ThankGod Onyena; Darlington Chinaza Amadi; Binah Somtochukwu Ojiyi
Journal Majelis Paspama Vol. 4 No. 02 (2026): Journal Majelis Paspama, 2026
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The use of Zircon (ZrSiO4) as reinforcement for aluminum (Al) alloys is generating interest due to its attractive properties. This has therefore made zircon a promising reinforcement for Al composites in automobile, aerospace, packaging and structural applications. While investigations on the mechanical responses of aluminum reinforced with zircon composites (especially hybrid composites) developed via stir casting has been extensively considered, limited works have been done on the compressive behaviour of single reinforced zircon composites. Hence, this work evaluates the compressive strength, compressive modulus, hardness, density, and impact strength of Al–ZrSiO4 composites produced by stir casting process. Compressive strength, hardness density increased with increasing zircon reinforcement while the compressive modulus and impact energy greatly reduced. Microstructural analysis confirms the presence and distribution of zircon particles. 
Microbiological Contamination and Hydrocarbon Pollution of Surface Water and Sediments in the Okulu River, Rivers State, Nigeria Chukwudozie Colman Ifiora; G. N. Woke; Felicity Uju Onwudinjo; Chimezie Ekeke; T. M. Iringe-Koko; Paul Aforji Osaro
Journal Majelis Paspama Vol. 4 No. 02 (2026): Journal Majelis Paspama, 2026
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Surface water bodies in industrialized regions are increasingly threatened by microbiological contamination and hydrocarbon pollution, raising serious concerns for environmental sustainability and public health The study employed a field-based analytical design to evaluate microbiological and physicochemical contamination of surface water and sediments in the Okulu River. Five sampling stations were established, comprising four industrially impacted sites and one control site. Surface water and sediment samples were systematically collected, preserved, and analyzed for total coliforms, Escherichia coli, petroleum aromatic hydrocarbons, and potassium using standard laboratory techniques. Results were statistically analyzed and compared with World Health Organization standards to assess contamination levels, spatial variation, and associated environmental and public health risks. Results revealed marked spatial variation and widespread contamination of the Okulu River. Total coliforms in surface water exceeded WHO limits at all stations, peaking at SW4 (712 cfu/100 ml) compared to the control (0.01 cfu/100 ml). Sediments showed even higher coliform loads, with SD4 recording 7,765 cfu/100 ml. E. coli counts followed similar trends in surface water (SW4: 84.2 cfu/100 ml) and sediments (SD4: 903.5 cfu/100 ml), indicating fecal pollution. PAH concentrations were extremely elevated in surface water (SW4: 1,723 ppm) and sediments (SD4: 2,606 ppm), far above WHO limits. Potassium exceeded guidelines in impacted sites for water (up to 17.02 mg/L) and sediments (up to 84.08 mg/L). In conclusion, the Okulu River is severely degraded by combined microbiological and hydrocarbon pollution, posing significant ecological and public health risks and necessitating urgent regulatory enforcement, continuous monitoring, and remediation interventions.
Development of a Web-Based Training Administration Information System at PT ZAF International Muhammad Fahmi; Septiano Alvian Ismau; Yasin Kamil; Sutriyono Sutriyono
Journal Majelis Paspama Vol. 4 No. 02 (2026): Journal Majelis Paspama, 2026
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PT ZAF International is a training institution that provides various training programs for the community. Previously, the training administration process utilized Google Forms for participant registration and spreadsheets for data management. The use of separate applications made the administrative process less efficient, required more time for data processing, and increased the risk of errors in assigning Participant Identification Numbers (NIP) and managing participant records. This internship aimed to design and develop a Web-Based Training Administration Information System to improve the administrative process at PT ZAF International. The system was developed using the Waterfall software development method, which consists of the requirements analysis, system design, implementation, testing, and maintenance stages. The application was built using the Laravel framework with PHP as the programming language and MySQL as the database management system. System testing was conducted using the Black Box Testing method to ensure that all system functions operated according to the specified requirements. In addition, User Acceptance Testing (UAT) was carried out to evaluate the system's acceptance by the end user. The result of this internship is a web-based information system that provides features for participant registration, registration data management, participant management, training management, training categories, training batches, referral management, and user management. The system is also capable of generating Participant Identification Numbers (NIP) automatically, thereby reducing the manual work previously performed by the administrator. Based on the testing results, all system functions operated successfully, and the system was considered capable of improving the efficiency and effectiveness of the training administration process while facilitating data management at PT ZAF International.
Development of a Web-Based Student Admission System with Cloud Storage for Permanent Registration at Darel Azhar Modern Islamic Boarding School Dwi Fitria Alfiani; Najwa Masayu Azzahra; Ariyas Pratama; Sutriyono Sutriyono
Journal Majelis Paspama Vol. 4 No. 02 (2026): Journal Majelis Paspama, 2026
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Pondok Pesantren Modern Darel Azhar is currently facing a serious challenge in the form of an unstable registration platform, which frequently changes links every academic year owing to third-party dependencies. The primary impact of this condition is the permanent loss of applicant student (santri) data from previous periods due to the absence of an adequate internal storage system. This study aims to build an independent online student admission information system (PPDB Online) utilizing cloud storage infrastructure to ensure data sustainability and information access stability. The system was developed using the Laravel framework following the SDLC Waterfall model, which encompasses requirement analysis through observation, interviews, and literature reviews. The supporting infrastructure is entirely cloud-based, utilizing Vercel for hosting, TiDB Cloud as the centralized database, and Cloudinary for centralized digital document storage. System testing was conducted using Black-box Testing to ensure feature functionality, and User Acceptance Testing (UAT) to validate that the system meets user requirements and is ready for implementation. The implementation results indicate that this PPDB Online system successfully integrates data into a single centralized database. Consequently, the Islamic boarding school management can securely manage student information from various academic years without the risk of data loss caused by changing platforms. Thus, this system provides full independence for Pondok Pesantren Modern Darel Azhar in managing its information assets while enhancing administrative service professionalism in the digital era.
Design and Development of Hydrothermal Carbonization Reactor Calistus Princewill Odeh; Orobosa Kingsley Osasuwa; Augustine Uzodimma Madumere; Sunday Chimezie Anyaora
Journal Majelis Paspama Vol. 4 No. 02 (2026): Journal Majelis Paspama, 2026
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This project presents the design, development, and evaluation of a hydrothermal carbonization (HTC) reactor for the conversion of biomass into carbon-rich hydrochar. The reactor was designed to operate under subcritical water conditions with controlled temperature and voltage inputs. Experimental tests were conducted at three voltage levels (185V, 210V, and 220V) and target operating temperatures of 180°C, 200°C, and 220°C. The results showed that heating rate and energy efficiency were directly influenced by voltage level. At higher voltages, the reactor attained the set temperatures in shorter times, with 220V achieving 220°C in 37 minutes compared to 44 minutes at 185V. The evaluation confirmed a linear correlation between temperature and time for all test conditions. The developed reactor demonstrates the potential for efficient thermal processing of wet biomass without prior drying, offering a sustainable pathway for waste-to-energy conversion. The study provides a foundation for further optimization of HTC reactor designs to enhance efficiency and scalability for industrial applications.
Application of Steam Distillation in Natural Gas Liquid Recovery and Stripping Nnadikwe Johnson; Samuel Kwelle; Okpala Blessing Chiamaka; Amaefula Chibunma Vivan; Momoh Abdulazeez Adeyemi; Ezechukwu Chioma Mary-Jane
Journal Majelis Paspama Vol. 4 No. 02 (2026): Journal Majelis Paspama, 2026
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Natural Gas Liquid, NGL, recovery is energy intensive due to the high reboiler duties required in multi-column fractionation trains. Conventional distillation accounts for over 50% of plant energy consumption, posing economic and environmental challenges especially for utility-limited and marginal fields. This study investigates the technical and energetic feasibility of integrating direct steam-assisted distillation with inter-column heat integration for NGL recovery. Process simulation was conducted using Aspen HYS V12.1 with Peng-Robinson Equation of State for a 10,000 BPD lean NGL feed. Two cases were evaluated: a conventional 4-column base case and a proposed steam-assisted case with steam strippers S-101 and S-102, and an inter-column heat exchanger E-101. The effect of steam-to-feed ratio, S/F, ranging from 0.00 to 0.10 lb/lb on product recovery and energy performance was analyzed. Two new performance metrics, Specific Energy Consumption, SEC, and Steam Utilization Index, SUI, were introduced. Results show that steam addition significantly improved C3+ recovery from 92.1% in the base case to 97.3% at an optimum S/F of 0.08 lb/lb. At this optimum, total reboiler duty was reduced by 14.2% from 142.3 to 122.1 MM Btu/hr, and SEC decreased by 12.4% from 1.85 to 1.62 MM Btu/GPM. Beyond S/F = 0.08, diminishing returns and increased SEC were observed due to excess steam cost. The study concludes that steam-assisted distillation with heat integration is a viable strategy for energy-efficient NGL recovery.

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