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Evaluasi Efektivitas Fotokatalisis TiO₂ dan H₂O₂ terhadap Pengolahan Limbah Cair dari Industri Tahu Meta Kholjana, Ahjul; Masriatini, Rully; Husnah
Jurnal Ilmiah Teknik Kimia Vol. 10 No. 1 (2026): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v10i1.52500

Abstract

The tofu industry in Indonesia significantly contributes to the national economy but also poses environmental challenges due to the liquid waste it generates. This wastewater contains organic and inorganic pollutants such as BOD, COD, TSS, and pH levels that do not meet effluent quality standards, potentially harming aquatic ecosystems. This study aims to evaluate the effectiveness of a photocatalytic process using titanium dioxide (TiO₂) and hydrogen peroxide (H₂O₂), activated by artificial UV-C light and sunlight, in reducing pollutants in tofu industrial wastewater. The treatment was conducted with a fixed concentration of 50 mg/L TiO₂ and 140 mL H₂O₂ per 1000 mL of wastewater, with contact times ranging from 30 to 60 minutes. Results showed that the TiO₂-H₂O₂ combination reduced COD by up to 84.78%, BOD by 76.75%, and TSS by 78.37%, while increasing the pH toward acceptable limits. The optimal degradation occurred under sunlight exposure for 60 minutes. This method offers a promising, eco-friendly, and cost-effective wastewater treatment solution.
The Impact of the Covid-19 Pandemic on Financial Performance: Evidence from State-Owned Infrastructure and Non-Infrastructure Companies Listed on the Indonesia Stock Exchange Muhammad Yunus Kasim; Muslimin; Husnah; Vitayanti Fattah; Munawarah; Adriyani Marwah
International Journal of Health, Economics, and Social Sciences (IJHESS) Vol. 8 No. 2: April 2026
Publisher : Universitas Muhammadiyah Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56338/ijhess.v8i2.10941

Abstract

This study aims to analyze and compare the performance of SOEs in the infrastructure and non-infrastructure sectors listed on the Indonesia Stock Exchange (IDX) for the 2019–2021 period. The method used is quantitative descriptive with secondary data in the form of annual performance values and corporate health predicates based on the assessment set. The results show that the performance of infrastructure SOEs fluctuated with a significant decrease in 2020 (50.68) due to the COVID-19 pandemic, then recovered in 2021 (55.05) in line with government stimulus and the acceleration of strategic projects. Meanwhile, non-infrastructure SOEs also recorded a sharp decline in 2020 (43.75) and experienced a slower recovery in 2021 (49.82), not yet reaching pre-pandemic levels. Comparatively, infrastructure SOEs consistently have higher performance values than non-infrastructure throughout the observation period. Based on a three-year average, both sectors are in the "Less Healthy" category, with the predicate BBB for infrastructure and BB for non-infrastructure. The study's conclusions confirm that although both sectors faced pressures during the crisis, infrastructure SOEs showed better resilience and recovery, so different policy interventions are needed to strengthen the performance of each sector going forward.
Co-Authors Adriyani Marwah Agus Wahyudi Agus Wahyudi Alia, Dina Antonius Yudhis Hindriarsana Azzahra, Irchi Amanda Fajaruna, Eva Fatimura, Muhrinsyah Fatmasari, Wida Fitriyanti, Reno Husni Mubarak Ian Kurniawan Irlina Dewi Jumita, Tiara Kurnia, Benny Meta Kholjana, Ahjul Muhammad Bakrie Muhammad Yunus Kasim Munawarah MUSLIMIN Neny Rochyani Neny Rochyani Nurjannah Nurlela Oktaviansyah, Ikbal Puspa Ningrum Rully Masriatini Saputro, Dimas Andrian Ully, Rully Masriatini Vitayanti Fattah Wida Fatmasari