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All Journal International Journal of Renewable Energy Development Journal of Pragmatics and Discourse Research RESWARA: Jurnal Riset Ilmu Teknik
Wei Chen
Institute of Energy and Power Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Transportation

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 1 
Effect of hydrothermal treatment temperature on the properties of sewage sludge derived solid fuel Yan, Mi; Prabowo, Bayu; Fang, Zhumin; Chen, Wei; Jiang, Zhiqiang; Hu, Yanjun
International Journal of Renewable Energy Development Vol 4, No 3 (2015): October 2015
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.4.3.163-169

Abstract

High moisture content along with poor dewaterability are the main challenges for sewage sludge treatment and utilization. In this study, the effect of hydrothermal treatment at various temperature (120-200 ËšC) on the properties of sewage sludge derived solid fuel was investigated in the terms of mechanical dewatering character, drying character, calorific value and heavy metal distribution. Hydrothermal treatment (HT) followed by dewatering process significantly reduced moisture content and improved calorific value of sewage sludge with the optimum condition obtained at 140ËšC. No significant alteration of drying characteristic was produced by HT. Heavy metal enrichment in solid particle was found after HT that highlighted the importance of further study regarding heavy metal behavior during combustion. However, it also implied the potential application of HT on sewage sludge for heavy metal removal from wastewater.
THE IMPORTANCE OF GUIDANCE IN UNDERSTANDING CULTURAL DISCOURSE IN THINKING AND SPEAKING FOR FOREIGN STUDENTS IN BIPA PROGRAM Tiawati, Refa Lina; Rahmat, Wahyudi; Kemal, Edwar; Chen, Wei
Journal of Pragmatics and Discourse Research Vol 2, No 1 (2022)
Publisher : ppjbsip

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51817/jpdr.v2i1.203

Abstract

The lack of understanding of cultural discourse in speech is the key to international failure success in understanding language concepts, especially for BIPA  learners in Indonesia.  This research aims to reveal the importance of understanding the concepts of speech that must be considered in communicating. The method used is qualitative descriptive. The object of this study is an international student from Taiwan named Xing-Qian, who is participating in the Indonesian program for Foreign Speakers (BIPA) at PGRI University of West Sumatra. This research is naturalistic. The data in this study is in the form of video that is the result of recording in the field directly, then using the technique of seeing the record to transcribe the research results into writing form. The results showed that the international students used a form of guidance on the instructions for begging, asking, welcoming, advising, and inviting.
Performance Evaluation of Urban Drainage Systems Using Hydrological Modeling in Makassar City Panguriseng, Darwis; Syafaat, Muhammad; Chen, Wei
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 1 (2026): RESWARA: Jurnal Riset Ilmu Teknik, January 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i1.363

Abstract

Urban flooding remains a critical issue in rapidly growing coastal cities, including Makassar City, Indonesia. Inadequate drainage capacity, land use change, and increasing rainfall intensity contribute to frequent inundation events. This study evaluates the performance of the urban drainage system in Makassar City using hydrological and hydraulic modeling approaches. The objective is to assess channel capacity, flow behavior, and system reliability under design rainfall scenarios. The research applies a quantitative approach using secondary rainfall data, drainage geometry, and land use information. Hydrological analysis estimates peak runoff, while hydraulic simulation evaluates flow capacity and water level conditions within the drainage network. The results indicate that several primary and secondary channels operate beyond their design capacity during peak rainfall events. Flow overflow and backwater effects occur in densely populated areas, particularly near the Pannampu Canal. Comparative analysis with previous studies confirms that insufficient channel dimensions and limited storage capacity are the main causes of system failure. The findings highlight the need for drainage normalization, integrated modeling-based planning, and sustainable urban drainage strategies. This study provides empirical evidence to support data-driven drainage management and flood mitigation policies in Makassar City.
Co-Authors Bayu Prabowo, Bayu Mi Yan, Mi Panguriseng, Darwis Syafaat, Muhammad Tiawati, Refa Lina Wahyudi Rahmat Yanjun Hu Zhiqiang Jiang, Zhiqiang Zhumin Fang, Zhumin