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All Journal Potensi : Jurnal Sipil Politeknik SIKLUS: Jurnal Teknik Sipil Edubiotik : Jurnal Pendidikan, Biologi dan Terapan
Gulo, Elrich Gratiawan WD
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Transportation

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Pengaruh Usia Stabilisasi Tanah Gambut Melalui Bioaugmentasi Oleh Bakteri Pseudomonas Taiwanensis Gulo, Elrich Gratiawan WD; Amalia, Dewi; Mase, Lindung Zalbuin; Yulianto, Faisal Estu
Siklus : Jurnal Teknik Sipil Vol. 9 No. 2 (2023): Siklus: Jurnal Teknik Sipil
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/siklus.v9i2.16064

Abstract

Sebelum membangun di atas tanah gambut harus dilakukan perlakuan treatment khusus agar struktur yang dibangun dapat stabil. Salah satu metode yang telah diusulkan untuk memperbaiki sifat tanah gambut adalah stabilisasi tanah biologis melalui pendekatan bioteknologi. Metode bioaugmentasi merupakan salah satu pendekatan perbaikan tanah yang ramah lingkungan. Penelitian ini bertujuan untuk mempercepat dekomposisi serat gambut, menurunkan kadar air dan mengatasi tingkat keasaman yang tinggi pada tanah gambut. Dalam studi eksperimen ini, bakteri pseudomonas taiwanensis digunakan sebagai agen dalam proses bioaugmentasi, karena memiliki kemampuan yang tinggi dalam dekomposisi serat gambut. Hasil penelitian menunjukkan bahwa penambahan bakteri pseudomonas taiwanensis sebesar 5% di masa pemeraman 28 hari berhasil mengurangi kadar air hingga 309,45%, dari awalnya 704,02% menjadi 394,57%. Selain itu, terjadi peningkatan signifikan pada nilai pH, dari 3,2 menjadi 6,5, pada semua variasi sampel. Oleh karena itu, dapat disimpulkan bahwa bakteri pseudomonas taiwanensis dapat efektif meningkatkan sifat fisik tanah gambut.
The Influence of Buton Tailing and Expanded Polystyrene (EPS) on The Shear Strength of Sandy Soil Amalia, Dewi; Gulo, Elrich Gratiawan WD; Hendry, Hendry; Kumala sari, Putu tantri; Lhwaint, Abdallh
Potensi: Jurnal Sipil Politeknik Vol. 27 No. 1 (2025): Potensi: Jurnal Sipil Politeknik
Publisher : Department of Civil Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v27i1.6415

Abstract

Buton tailings, which are a by-product of Buton asphalt, have not been optimally utilized. In fact, research shows that Buton tailings have the potential as an additive to improve soil characteristics, especially sandy soil. This study aims to analyze the effect of the addition of Buton tailings and Expanded Polystyrene (EPS) on the shear strength of sandy soil. The sandy soil used came from Padalarang, Indonesia. Tests were conducted by adding Buton tailings at 0%, 2.5%, 5%, 7.5%, 10%, and 12.5% of the soil weight, and EPS at 0.15%, 0.3%, and 0.45%. The results showed that the addition of Buton tailings increased the cohesion and shear angle of sand soil. The most significant increase occurred with the addition of 5% Buton tailings and 0.15% EPS which increased the inner shear angle by 44% from the initial condition. Based on these results, it can be concluded that the combination of Buton tailings and EPS has the potential to increase the shear strength of sand soil.
Bacteria Pseudomonas taiwanensis as a decomposing agent of peat fiber Gulo, Elrich Gratiawan WD; Amalia , Dewi; Mase, Lindung Zalbuin; Yulianto, Faisal Estu; Kusuma, Yusmiati; Juarti, Ery Radya; Suyono, Agus
Edubiotik : Jurnal Pendidikan, Biologi dan Terapan Vol. 8 No. 02 (2023): Edubiotik : Jurnal Pendidikan, Biologi dan Terapan
Publisher : Biology Education Department, Universitas Insan Budi Utomo, Malang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33503/ebio.v8i02.1046

Abstract

Efforts are needed to accelerate the decomposition of peat fiber to reduce the fiber content through bioaugmentation using Pseudomonas taiwanensis bacteria so that it can reduce the high-water content of peat fiber. The research aimed to determine the effect of adding Pseudomonas taiwanensis bacteria on the decomposition of peat fiber. This research is a laboratory experimental research. The research sampling location was in Bereng Bengkel Village, Palangkaraya. The parameters observed included fiber content, fiber size distribution, and peat fiber decomposition speed following the Peat Testing Manual. The research instrument was an observation sheet for fiber content, size distribution, and peat fiber decomposition speed. Research data was analyzed using descriptive statistical analysis. The results showed that adding 15% Pseudomonas taiwanensis bacteria with a curing period of 28 days in fibrous peat resulted in the highest reduction in fiber content, from the initial condition of 61.14% to 12.33%. This variation also shows a decrease in coarse and medium fiber content and a significant increase in fine fiber content. The decomposition rate for this variation shows good consistency. The conclusion was that adding 15% Pseudomonas taiwanensis bacteria with a curing period of 28 days showed optimal results in accelerating the decomposition of peat fiber through the bioaugmentation method.
Co-Authors Abdallh Lhwaint, Abdallh AGUS SUYONO Amalia , Dewi Chatarina Umbul Wahyuni Dewi Amalia Ery Radya Juarti, Ery Radya Faisal Estu Yulianto, Faisal Estu Kumala sari, Putu tantri Kusuma, Yusmiati Lindung Zalbuin Mase, Lindung Zalbuin