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All Journal JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan JURNAL RUMPUN MANAJEMEN DAN EKONOMI
Eka Pratiwi, Yunita
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Chemistry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Mathematics Public Health Social Sciences

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Testing BIOSEL-SR2020 to Reduce Physical-Chemical Contents in Faecal Sludge Treatment Installations in Puulonggida and Potential as An Organic Fertilizer Ingredient Wibowo, Dwiprayogo; Sumarlin, Sumarlin; Aridan, Aridan; Herman, Suwardin; Murdi, Murdi; Ndibale, Wa; Eka Pratiwi, Yunita; Nurcayah, Nurcayah
JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan Vol 20 No 2 (2023): Jurnal Kesehatan Lingkungan Volume 20 No. 2, Juli 2023
Publisher : Poltekkes Kemenkes Banjarmasin Jurusan Kesehatan Lingkungan Banjarbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31964/jkl.v20i2.663

Abstract

To improve environmental health and address the issue of domestic fecal sludge waste, it is essential to treat the waste using an environmentally friendly organic oxidizing material, BIOSEL-SR2020. This study examines the effect of adding BIOSEL-SR2020 to reduce the physicochemical content of fecal sludge at the Puulonggida sludge treatment plant (STP) in Kendari City and its potential as a component of organic fertilizer. The environmental condition of Puulonggida STP shows that the air quality around the STP is excellent. The area is far from residential zones and features numerous trees, which help transform the toxic gases produced by septage treatment. The application of BIOSEL-SR2020 to septage solids significantly alters and enhances the chemical elements in the septage. Oxide composition data, such as MgO, Al2O3, SiO2, and CaO—soil components—indicate that BIOSEL-SR2020 application significantly improves chili plant growth compared to commercial organic fertilizer and untreated samples. Furthermore, treating fecal sludge liquids with BIOSEL-SR2020 affects the pH, maintaining a standard range of 7.06 - 7.13. The Dissolved Oxygen (DO) value increases slightly, and the fecal liquid’s salinity indicates no mineral salts. BIOSEL-SR2020 also demonstrates antibacterial properties, reducing bacterial colonies by an average of 26%. The most prevalent bacteria, Klebsiella sp., and Pseudomonas sp. are effective in decomposing fecal organic matter at the Puulonggida STP. In conclusion, BIOSEL-SR2020 effectively enhances the physicochemical properties of fecal sludge and holds potential as a mixture in organic fertilizers, significantly benefiting plant growth and environmental health.
Pengaruh Ukuran Perusahaan, Return On Asset Dan Price Book Value Terhadap Harga Saham Pada Pt Adaro Energy Tbk Periode 2014 - 2023 Eka Pratiwi, Yunita; Mardiati , Dijan
JURNAL RUMPUN MANAJEMEN DAN EKONOMI Vol. 2 No. 5 (2025): September
Publisher : CV. KAMPUS AKADEMIK PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61722/jrme.v2i5.6669

Abstract

The purpose of this study was to determine the effect of Firm Size, Return on Assets (ROA), and Price Book Value (PBV) on Stock Prices at PT Adaro Energy Tbk, a company listed on the Indonesia Stock Exchange, specifically PT Adaro Energy Tbk for the period 2014–2023. This is a quantitative study using linear regression analysis. Data were processed using SPSS software version 26. The sampling technique used was purposive sampling based on specific criteria. The results of the partial test (t-test) indicate that Firm Size has a positive and significant effect on Stock Price with a calculated t-value of 4.778 > table t-value of 1.860 and significance of 0.001 < 0.05. Meanwhile, ROA has a positive and significant effect on Stock Price with a calculated t-value of 7. 085 > t-table 1.860 and significance 0.000 <0.05. Similarly, PBV also has a positive and significant effect on Stock Price with t-count 2.766 > t-table 1.860 and significance 0.024 <0.05. The simultaneous test (F-test) shows that the three independent variables together have a significant effect on Stock Price, with F-calculated 98.031 > F-table 4.35 and significance 0.000 < 0.05. The coefficient of determination (Adjusted R²) value of 0.970 indicates that 97% of the variation in Stock Price can be explained by Firm Size, ROA, and PBV. This study shows that internal factors play an important role in determining the share price of PT Adaro Energy Tbk. These results can be used as a reference for investors in making decisions based on the company's financial indicators.  
Co-Authors Aminuyati Aridan, Aridan Herman, Suwardin Mardiati , Dijan Murdi, Murdi Ndibale, Wa Nurcayah Rasawula Lukman, Renaldo Rosdiana Rosdiana Wibowo, Dwiprayogo