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Ramadhani, Ahmad Akbar
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Civil Engineering, Building, Construction & Architecture Environmental Science

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PERMODELAN MODIFIKASI ALAT PEMADATAN DI LABORATORIUM SESUAI DENGAN SNI SNI 1743:2008 Norhadi, Ahmad; Surat, Surat; Fauzi, Muhammad; Ramadhani, Ahmad Akbar; Rachman, Dede
Jurnal Teknik Sipil Vol 4 No 1 (2020): Jurnal Gradasi Teknik Sipil - Juni 2020
Publisher : P3M Politeknik Negeri Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31961/gradasi.v4i1.813

Abstract

Pesatnya perkembangan prasarana di kota Banjarmasin terutama dalam sarana transportasi, akibat jumlah kendaraan yang semakin meningkat kian harinya. Hal tersebut menyebabkan kebutuhan masyarakat yang juga bertambah, seperti kebutuhan jalan yang baru dan sesuai Spesifiikasi Umum Bina Marga. Oleh sebab itu, pembangunan jalan baru atau perbaikan jalan yang lama harus segera terealisasikan oleh pemerintah. Dalam rangka membangun suatu konstruksi seperti salah satunya pembangunan jalan baru perlu perencanaan dan penelitian yang matang sebab pembangunan jalan sangat berkaitan dengan kondisi fisik dan mekanis lapis pondasi, dimana jalan mempunyai beberapa lapis pondasi ditinjau berdasarkan gradasi agregatnya. Dalam pelaksanaan pekerjaan lapis pondasi di lapangan diperlukan pemadatan yang maksimum agar mengantisipasi terjadinya penurunan akibat adanya pembebanan lalu lintas. Dalam praktek pemadatan di lapangan pada umumnya menggunakan mesin penggilas tanpa ada persyaratan material harus lolos saringan 19,00 mm (3/4″) sedangkan pada pekerjaan pemadatan Lapis Pondasi Agregat Kelas B di laboratorium menggunakan metode pemadatan berat dan untuk bahan campuran material harus yang lolos saringan 19,00 mm (3/4″). Dari hasil penelitian ini dapat diketahui nilai kepadatan maksimum dan kadar air optimum serta nilai CBR desain sesuai dengan SNI 1743:2008 yaitu Nilai Kepadatan Kering Maksimum (maks) 2,243 gr/cm3, Kadar Air Optimum 4,7%, dan Nilai CBR desain 78%. Nilai kepadatan maksimum dan kadar air optimum serta nilai CBR desain sesuai dengan permodelan alat pemadatan 2 lapisan dan 3 lapisan, hasil pengujian permodelan modifikasi alat pemadatan 2 lapisan didapatkan Nilai Kepadatan Kering Maksimum (maks) 2,183 gr/cm3, Kadar Air Optimum 4,9 %, dan Nilai CBR desain 16%, hasil pengujian permodelan modifikasi alat pemadatan 3 lapisan mendapatkan rata-rata Nilai Kepadatan Kering Maksimum (maks) 2,194 gr/cm3, Kadar Air Optimum 4,6 %, dan Nilai CBR desain 22%. Kesesuaian parameter hasil sifat mekanis antara standar SNI 1743:2008 dengan permodelan modifikasi alat pemadatan di laboratorium menunjukkan bahwa permodelan modifikasi alat pemadatan dan CBR Laboratorium tidak sesuai dengan SNI 1743:2008 karena tidak mencapai minimum desain CBR Laboratorium dalam Spesifikasi Umum 2010 Rev 3 Bina Marga Divisi 5 pada Lapis Pondasi Agregat Kelas B.
ANALYSIS OF BOD LEVELS IN LABORATORY WASTE USING THE PHYTOREMEDIATION METHOD OF WATER HYACINTH (Eichornia Crassipes) Malina, Lina; Rasyidah, Rasyidah; Ramadhani, Ahmad Akbar
EnviroScienteae Vol 20, No 4 (2024): ENVIROSCIENTEAE VOLUME 20 NOMOR 4, NOVEMBER 2024
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/es.v20i4.20884

Abstract

Laboratory wastewater is characterized by significant pollutants, including surfactants, phosphates, organic compounds, and inorganic compounds, leading to elevated BOD levels. BOD (Biological Oxygen Demand) serves as a key parameter for assessing the likelihood of pollution in waste materials. The higher the BOD level, the greater the potential for pollution. The utilization of phytoremediation technology with water hyacinth plants presents a promising alternative for the removal of waste pollutants, harnessing natural resources that are frequently regarded as weeds. This study thus seeks to examine BOD levels, the impact of water hyacinth quantity and waste exposure duration, and the effectiveness of the water hyacinth phytoremediation technique in lowering BOD levels in laboratory waste. This study’s benefits are to provide information on BOD level analysis, examine the impact of water hyacinth quantity and the duration of waste exposure, and assess the effectiveness of the water hyacinth phytoremediation method on BOD levels in laboratory waste. The employed research method is experimental, utilizing phytoremediation with water hyacinth plants, structured as a Factorial Randomized Block Design (RAK) with two factors and three replications. The variations consisted of 5, 10, and 15 plant clumps, with exposure durations of 3, 6, and 9 days. BOD levels were determined using the SNI 6989.72: 2009 method for the Biochemical Oxygen Demand/BOD test. The study results demonstrated an efficiency in reducing BOD levels ranging from 83.60% to 96.33%. The number of water hyacinth clumps and the duration of waste exposure had a substantial impact on the reduction of BOD and COD, with a significance level of less than 0.01. The effectiveness of the water hyacinth phytoremediation method in reducing BOD levels in laboratory waste achieved a notable N gain score of 93.27%. In conclusion, the efficiency of BOD reduction attained 96.33%. Furthermore, an increased quantity of water hyacinth plants and prolonged exposure to waste would further diminish BOD levels, indicating that the water hyacinth phytoremediation technique is effective in lowering BOD levels in laboratory waste.
Co-Authors A.A. Ketut Agung Cahyawan W Ahmad Norhadi, Ahmad Malina, Lina Rachman, Dede Rasyidah Rasyidah Surat, Surat