Characteristic of concrete using acetylene sludge as a substitute material for sand and cement

Acetylene sludge comes from the production of acetylene gas which is produced in large quantities from industrial plants. Since acetylene sludge waste has a baling and mortar properties as well as lime derivative products, they can be used as substitutes or substitutes for cement in concrete products and other construction materials.  The aim of this study is to obtain a concrete with a proper strength and comply the toxicity standards by utilizing acetylene sludge waste. The waste (containing of 60% acetylene sludge and 40% fly ash) is utilized by mixing it on some series of trial that are 5%, 10%, and 15% waste from the main concrete materials. The concrete strength is measured using Compressive Strength Test Method that refers to Indonesian National Standard No. 1974:2011. Other than that, Toxicity Characteristic Leaching Procedure (TCLP) test were also done using Optical Emission Spectrometer to determine the leaching potential from concrete utilization. The concrete paste gave the value of slump 6 and 7 with concrete mixture declined by 15-18 cm. Result showed that the strongest concrete is from the mixture of 15% sand material that was substituted by the acetylene sludge waste with the strength value of 41.9 MPa. TCLP test results were given the value of Barium 0.019 mg/L and Chromium 0.680 mg/L with a pH value of 12.24. Referring to Indonesian Government Regulation No. 101 Year 2014, the quality standards of Barium and Chromium are 35 mg/L and 2.5 mg/L. That showed the characteristic of concrete which is produced from acetylene sludge waste complies the standards and safe for the environment

Chlorpyrifos removal by Thiobacillus sp. and Clostridium sp. in liquid medium

The bioremediation research of chlorpyrifos has been done to remove the concentration of chlorphyrifos using the natural bacterial Thiobacillus sp. and Clostridium sp.. The efficiency of chlorpyrifos removal was determined by the temperature and contact time. The research was done by adding 100 ppm of chlorpyrifos into the Stone Mineral Salt solution (SMSs) under controlled condition, then each bacterial are added as much as 10% (v/v) with pH 7. To obtain optimum efficiency, this study was conducted with temperature variation (°C) 25, 30, 35, 40 and contact time (hours) 12, 24, 36, 48. Based on Gas Chromatography Mass Spektrofotometer (GC-MS) analysis, the efficiency of removal at temperature (°C) 25, 30, 35, 40 are 43%, 68%, 71% and 52% respectively, while the removal efficiency at contact time (hours) 12, 24, 36, 48 are 43%, 49%, 74%, and 36%. The result showed that 74% removal efficiency by Thiobacillus sp. and Clostridium sp. obtained at 35°C in 36 hours of contact time. Thus, the mixed culture of Thiobacillus sp. and Clostridium sp. are able to synergize for removing the chlorpyrifos at 100 ppm

Chlorpyrifos removal by Thiobacillus sp. and Clostridium sp. in liquid medium

The bioremediation research of chlorpyrifos has been done to remove the concentration of chlorphyrifos using the natural bacterial Thiobacillus sp. and Clostridium sp.. The efficiency of chlorpyrifos removal was determined by the temperature and contact time. The research was done by adding 100 ppm of chlorpyrifos into the Stone Mineral Salt solution (SMSs) under controlled condition, then each bacterial are added as much as 10% (v/v) with pH 7. To obtain optimum efficiency, this study was conducted with temperature variation (°C) 25, 30, 35, 40 and contact time (hours) 12, 24, 36, 48. Based on Gas Chromatography Mass Spektrofotometer (GC-MS) analysis, the efficiency of removal at temperature (°C) 25, 30, 35, 40 are 43%, 68%, 71% and 52% respectively, while the removal efficiency at contact time (hours) 12, 24, 36, 48 are 43%, 49%, 74%, and 36%. The result showed that 74% removal efficiency by Thiobacillus sp. and Clostridium sp. obtained at 35°C in 36 hours of contact time. Thus, the mixed culture of Thiobacillus sp. and Clostridium sp. are able to synergize for removing the chlorpyrifos at 100 ppm

Pengelolaan dan Kesehatan Lingkungan di Sekolah Bersama SMAN Cahaya Madani Banten Boarding School, Kabupaten Pandeglang, Banten

Kesehatan lingkungan adalah elemen yang sangat penting dalam kaitannya dengan potensi penyebaran penyakit terutama di era pandemi Covid-19 bila kondisi lingkungan tidak layak. Melalui pengelolaan lingkungan yang baik disertai dengan edukasi yang rutin dan kontinyu pada lingkungan, maka sekolah berasrama dapat menjadi contoh penerapan pengelolaan kesehatan lingkungan yang baik. Melalui kegiatan penyuluhan ini, Tim Pengabdian kepada Masyarakat Program Studi Teknik Lingkungan dan Arsitektur Lanskap bertujuan untuk mengedukasi sivitas akademika SMAN CMBBS agar dapat meningkatakan kesadaran dalam memenuhi Fasilitas dasar yang layak dan penerapan pola kesehatan lingkungan yang terpadu dengan menerapkan perilaku hidup bersih dan sehat (PHBS). Metode yang digunakan adalah penyuluhan materi edukasi dan poster melalui seminar daring menggunakan media tatap muka daring (video conference). Sebanyak 48,1% responden peserta penyuluhan ini belum memiliki kesiapan untuk memulai kembali sekolah tatap muka karena belum adanya persiapan matang dari pihak sekolah terkait sistem pengelolaan kesehatan lingkungan terpadu terutama tentang PHBS untuk mencegah terbentuknya klaster pandemi. Kegiatan penyuluhan tentang lingkungan yang berdampak pada Kesehatan ini sangat bermanfaat dalam membuka wawasan dan kesadaran sivitas akedemika CMBBS untuk menghadapi dimulainya proses belajar tatap muka di kelas