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All Journal Teras Jurnal Potensi : Jurnal Sipil Politeknik Journal of Innovative and Creativity
Dewi Amalia
Politeknik Negeri Bandung
Civil Engineering, Building, Construction & Architecture Education Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics Social Sciences Transportation Other

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Strategi Pengelolaan Bisnis Budidaya Maggot Black Soldier Fly (BSF) dalam Akselerasi Program Kampus Zero Waste: Studi Kasus Politeknik Negeri Bandung Dewi Amalia; Aceng Gima Sugiama; Yackob Astor; Harita Nurwahyu Chamidy; Keryanti; Ira Puspitasari
Journal of Innovative and Creativity Vol. 6 No. 1 (2026)
Publisher : Fakultas Ilmu Pendidikan Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joecy.v6i1.7478

Abstract

Institusi pendidikan tinggi menghadapi tantangan signifikan dalam mengelola limbah organik. Studi ini mengevaluasi proyek percontohan budidaya larva lalat Black Soldier Fly (BSF) sebagai solusi ekonomi sirkular di Politeknik Negeri Bandung (POLBAN). Menggunakan pendekatan metode campuran konvergen paralel, penelitian ini menggabungkan data operasional kuantitatif dengan analisis pemangku kepentingan kualitatif. Hasil menunjukkan bahwa sistem mencapai indeks pengurangan limbah sebesar 90,07%, dengan pemrosesan limbah organik hingga 1,57 ton per bulan secara konsisten. Efisiensi produksi meningkat secara signifikan, dengan Rasio Konversi Pakan (FCR) turun dari 19,9:1 menjadi 2,7:1 dalam tiga bulan. Secara finansial, proyek ini mencapai kemandirian dalam pembibitan, dan menghilangkan biaya benih. Penelitian ini menyediakan peta jalan strategis untuk mengintegrasikan teknologi biokonversi ke dalam kebijakan pengelolaan limbah institusional.
Analysis of Permeability Coefficient on Stabilished Peat using Bacillus Subtilis Bacteria Annisa Khoerani; dewi amalia; Suherman Sulaiman
Potensi: Jurnal Sipil Politeknik Vol. 26 No. 2 (2024): 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.v26i2.5825

Abstract

In construction sector, peat is one type of soil that is avoided because it has poor characteristics. This is because peat has very different characteristics when compared to other types of soil. Poor peat characteristics often lead to damage and construction failure of infrastructure buildings on peat. For example, large settlement values are caused by high peat compression that strongly influenced by its permeability value. The smaller the permeability value, the smaller the compression that occurs. Indonesia has the largest peatland distribution in Southeast Asia, this is a problem that must be resolved immediately. Much research has been done to improve the characteristics of peat, one of which is peat stabilization. Microbially Induced Calcite Precipitation (MICP) method using Bacillus subtilis was considered as an effective method in peat stabilization. This stabilization can reduce the permeability value of the peat by closing the pores in the peat. To investigate the influence of the bacteria on the peat sample, several tests was conducted including the physical property and permeability test. In this study, the addition of Bacillus subtilis bacteria solution can reduce the permeability value of peat from 0.001170 cm/sec to 0.000317 cm/s at the addition of 5% bacteria solution.
Pemanfaatan Limbah Beton dan Serbuk Batu Kapur sebagai Bahan Stabilisaasi Tanah Lunak Dewi Amalia; Firuliadhim Firuliadhim; Sitorus Tio Rani Betseba; Rifa Sabila
Teras Jurnal : Jurnal Teknik Sipil Vol. 15 No. 2 (2025): Teras Jurnal (September)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v15i2.1304

Abstract

Abstrak   Tanah lempung lunak sering menjadi kendala dalam pekerjaan konstruksi karena daya dukungnya rendah dan sifatnya mudah berubah akibat kadar air. Untuk mengatasi hal tersebut, penelitian ini dilakukan dengan menstabilisasi tanah menggunakan campuran serbuk batu kapur 10% dan limbah beton sebanyak 5%, 10%, dan 15% sebagai bahan alternatif ramah lingkungan. Serangkaian pengujian laboratorium seperti berat jenis, analisa ukuran butir, atterberg limit, pemadatan, california bearing ratio (CBR), dan swelling dilakukan setelah masa pemeraman selama 14 hari. Hasil menunjukkan bahwa campuran terbaik terdapat pada variasi 10% serbuk batu kapur dan 15% limbah beton. Pada variasi ini, indeks plastisitas menurun 85,90%, dari 36,60% menjadi 5,15%. Nilai CBR unsoaked meningkat 435,38%, dari 6,2% menjadi 33,2%, sedangkan nilai CBR soaked meningkat 523,66%, dari 4,65% menjadi 29%. Nilai swelling pun mengalami penurunan sebesar 89,18%, dari 6,47% menjadi 0,70%. Hasil ini membuktikan bahwa kombinasi bahan tersebut efektif memperbaiki karakteristik tanah lempung lunak.   Kata kunci: Stabilisasi, Lempung, Limbah Beton, Serbuk Batu Kapur, California Bearing Ratio   Abstract   Soft clay soils often pose challenges in construction due to their low bearing capacity and high sensitivity to moisture content. To address this issue, this study stabilized soft clay using a mixture of 10% limestone powder and concrete waste at 5%, 10%, and 15% as environmentally friendly alternative materials. Laboratory tests—including specific gravity, grain size analysis, Atterberg limits, compaction, California Bearing Ratio (CBR), and swelling—were conducted after 14 days of curing. The results showed the optimal mix was 10% limestone powder and 15% concrete waste. In this variation, the plasticity index decreased by 85.90%, from 36.60% to 5.15%. The unsoaked CBR value increased by 435.38%, from 6.2% to 33.2%, while the soaked CBR value rose by 523.66%, from 4.65% to 29%. Swelling also decreased significantly by 89.18%, from 6.47% to 0.70%. These findings confirm that the material combination effectively improves the engineering properties of soft clay soils.   Keywords: Stabilization, Clay, Concrete Waste, Limestone Powder, California Bearing Ratio
Co-Authors Aceng Gima Sugiama Annisa Khoerani Firuliadhim Firuliadhim Ira Puspitasari Keryanti, Keryanti Rifa Sabila Sitorus Tio Rani Betseba Suherman Sulaiman Yackob Astor