https://mail.ejournal.itn.ac.id/JSTAS <p style="margin: 0in; text-align: justify;"><em><strong>The Journal of Sustainable Technology and Applied Science (</strong></em><strong>JSTAS</strong><em><strong>)</strong></em> is an accessible and peer-reviewed journal that publishes current findings from cutting-edge research in sustainable technology, sciences, and related issues. The journal focuses on both theoretical and empirical research on technologies and sciences, including related theories and applications of technologies and sciences, chemistry, technology management, engineering, architecture, transfer of technology, and green technology. Contributions must be original, not previously or simultaneously published elsewhere, and critically reviewed before publication. Papers must be written in English and have sound grammar and proper terminologies. The journal is published online twice a year, in May and November.</p> <p style="margin: 0in;"><a href="https://issn.brin.go.id/?daftar&amp;1516285482&amp;1&amp;&amp;"><strong>e-ISSN 2722-2403</strong></a></p> <p style="margin: 0in;"><strong>Suitable topics include but are not limited to:</strong><strong><br>• Science, technology and innovation (STI)<br>• Role of STI in achieving SD<br>• SD policies and strategies and the government's involvement in SD practices and regulations<br>• Research and development<br>• ICTs and SD<br>• Education and SD<br>• Engineering, industry and sustainable manufacturing systems<br>• Food security policies and sustainable food production systems<br>• Future trends in STI<br>• UN Millennium Development Goals (MDGs)<br>• Water, energy and climate change<br>• Impact of innovation and knowledge upon productivity increase/enhancement<br>• Knowledge-based economy and SD<br>• The role of the informal sector in sustainable economic growth</strong></p> <p style="margin: 0in;"><strong>Akreditasi</strong> : <a href="https://sinta.kemdikbud.go.id/journals/profile/9415">Terakreditasi Sinta 4</a></p> <p style="margin: 0in;">&nbsp;</p> Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang en-US Journal of Sustainable Technology and Applied Science (JSTAS) 2722-2403 https://mail.ejournal.itn.ac.id/JSTAS/article/view/11746 <p>This community service-based research is simply an effort to treat household wastewater to support the availability of clean water sources in urban areas. The type of waste treated here is <em>graywater </em>waste, which is wastewater that comes from kitchen and bathroom sinks or washing water (not feces and urine). The reason for choosing this type of <em>graywater </em>waste is because of its high production, which is up to 70-75% of the total liquid waste generated from domestic activities. The method used is a physical model in the laboratory using wastewater with a model scale that uses variations in discharge, number of vetiver stems, and residence time. The study's results indicated that the filter model improved wastewater quality, producing an output that met clean water standards. This demonstrates that using wastewater treatment filters with variations in water discharge, number of rods, and residence time effectively reduces pollutants in graywater.</p> Lies Kurniawati Wulandari I Wayan Mundra Hardianto Yosimson Petrus Manaha Copyright (c) 2025 Journal of Sustainable Technology and Applied Science (JSTAS) 2025-11-19 2025-11-19 6 2 51 56 10.36040/jstas.v6i2.11746 https://mail.ejournal.itn.ac.id/JSTAS/article/view/9411 <p>Lighting conditions in office building B of UNISMA have not met the SNI standard because each room has the same number of lights for different rooms; this results in a large amount of electricity consumption from the lighting sector. The installation of the number of lamp armatures should be in accordance with the area of ​​the room and then related to the function of the room and must also meet the standard lighting of the room (SNI 03 – 6575 – 2011.2011). For that, the calculation of the number of lamp armatures is appropriate for the standard and design of room lighting using Dialux software, where the office lighting standard is 350 Lux. Based on these steps, the lighting standard is produced approaching the SNI standard using Philips LED lights. With this design condition, the use of electrical energy becomes optimum and energy efficiency is achieved. Based on the Dialux software simulation, the percentage of savings in the initial conditions and design was 39%:61%.</p> <p>&nbsp;</p> Ainun Zakiyah Abraham Lomi Fourry Handoko Copyright (c) 2025 Journal of Sustainable Technology and Applied Science (JSTAS) 2025-12-16 2025-12-16 6 2 57 62 10.36040/jstas.v6i2.9411