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World Chemical Engineering Journal
Published by Universitas Sultan Ageng Tirtayasa
ISSN : -     EISSN : 24432261     DOI : https://dx.doi.org/10.62870/wcej.v8i1.26617
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering
WCEJ publishes original papers and reviewed papers on the fundamental, theoretical as well as applications of Chemical Engineering. WCEJ is published two times a year. This journal covering some aspects of chemical engineering, which are environmental chemical engineering, chemical reaction engineering, bioprocess-chemical engineering, materials synthesis and processing.
Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)
Articles 85 Documents
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Analysis of Biogas Production Kinetics from Cow Dung and Food Waste Puspitasari, Sasikirana; Amanda, Syahla; Prasetyawati, Eka; Syaichurrozi, Iqbal
World Chemical Engineering Journal VOLUME 9 NO. 1 JUNE 2025
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v9i1.33629

Abstract

The increasing volume of organic waste, such as cow dung and food waste, is a significant environmental problem. One potential solution is the utilization of these wastes as raw materials for biogas production through anaerobic processes. This study aims to analyze the rate of biogas production from a mixture of cow dung and food waste with a kinetic approach using three mathematical models: First-Order, Gompertz, and Logistic. The volume of biogas produced was measured periodically and analyzed using the three models to determine kinetic parameters such as the maximum rate of biogas production and time. Using secondary data from previous studies, three kinetic models, namely Gompertz, First Order, and Logistic, were applied to predict biogas. The best modeling results that have been obtained are in Logistic modeling. In this modeling, the SSE value of cow dung is 58.62 mL and potential biogas peoduction is 167.12 mL,  lag phase period is 3.82 mL and maximum biogas production is 15.91 mL.
Analysis of Quality Control of Drawn Textured Yarn Using Six Sigma Method at Indorama Engineering Polytechnic Production Unit Ulum, Rikzan Bachrul; Agassi, Andre; Muchtar, Diki
World Chemical Engineering Journal VOLUME 9 NO. 1 JUNE 2025
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v9i1.33651

Abstract

Drawn textured yarn is one of the production outputs of the Vocational Training Center at Politeknik Enjinering Indorama, a partner of PT Indorama Synthetics Tbk. In its production process at the Vocational Training Center of Politeknik Enjinering Indorama, product defects are still encountered. To reduce product defects, the Six Sigma method with DMAIC approach is employed. For companies prioritizing product quality, quality control over the products must be conducted. This can manage and control the number of rejected or damaged products that could potentially harm the company's reputation in the eyes of consumers when the products are marketed.
Kinetic Analysis of Biogas Production from Cow Manure Waste Tsaqif, Farhan Fadlurohman; Erlina, Laras; Putra, Afshar Rehansyah; Akram, Felda; Syaichurrozi, Iqbal
World Chemical Engineering Journal VOLUME 9 NO. 1 JUNE 2025
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v9i1.33593

Abstract

Biogas is the result of decomposing organic waste that can be used as alternative energy. One of the organic waste that has the potential to produce biogas is livestock waste. The purpose of this scientific article is to see the results of kinetic models on secondary data processing of biogas volume acquisition/day. This scientific article was conducted by processing secondary data on biogas production at several pH variations (N1 = 7.17, N2 = 7.22, N3 = 7.24) using several kinetic models, namely the Gompertz model, logistic model, and first-order model. The best results are obtained in the logistic model, where the objective function value is the smallest. For each variation of N1, N2, and N3, the SSE values obtained are 458.37, 423, and 309. For the Gompertz and logistic models have the same graphical shape which is sigmoid-shaped or "s" shaped, which indicates that there are three phases in the formation of biogas, namely the pause phase, the rapid growth phase, and the stable growth phase. For the first-order model, it has a linear graph shape which states that in this model, there is a simplification of stages, namely only the hydrolysis stage which follows a first-order pattern.
Utilization of Agricultural and Organic Waste as Eco-Friendly Biomass-based Adsorbents Pujiastuti, Hendrini; Aziz, Sarah Rafidah
World Chemical Engineering Journal VOLUME 9 NO. 1 JUNE 2025
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v9i1.33760

Abstract

The development of effective and sustainable remediation techniques is required due to the growing environmental contamination brought on by industrial activities, especially from heavy metals and organic pollutants. The purpose of this review is to evaluate critically the potential of biomass-based adsorbents made from organic and agricultural waste for use in environmental remediation, specifically in the treatment of soil and water. The study assesses the surface properties, functional groups, and adsorption mechanisms of several bio-adsorbents and groups them according to their sources, including activated carbon, agricultural residues, and biochar. The impact of chemical and physical changes on improving adsorption performance is also thoroughly examined. The results show that these environmentally friendly materials have notable adsorption capacities and provide a sustainable, scalable, and affordable substitute for traditional synthetic adsorbents. The study adds to the expanding corpus of research that supports the circular economy's waste valuation principles and emphasises the usefulness of green environmental management techniques.
Kinetic Analysis of the Effect of pH on Biogas Production from Cow Manure Waste through Anaerobic Processes Priyatna, Aufa Irsyad; Firdaus, Alzena Nasywa; Sa'diyah, Siti Halimatu; Syaichurrozi, Iqbal
World Chemical Engineering Journal VOLUME 9 NO. 1 JUNE 2025
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v9i1.33625

Abstract

Biogas is the decomposition of organic waste by bacteria through an anaerobic fermentation process that can be managed to produce biogas in the form of methane gas (CH4). This study aims to analyze the effect of pH variation on biogas production through anaerobic digestion using a kinetic modeling approach. Using secondary data from previous studies, three kinetic models Gompertz, First Order, and Logistic were applied to predict biogas volume at acidic pH 4.52, neutral (6.80), and alkaline (8.52). Alkaline pH (8.52) resulted in the highest biogas production at 2850 mL. At pH 8.52, Gompertz parameters such as production potential (4,231.24 mL), maximum rate (163.19 mL/day), and shortest lag phase (3.92 days) indicated the highest efficiency.

Page 9 of 9 | Total Record : 85

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