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Pengaruh Penggunaan Fly Ash dan Bottom Ash sebagai Cover dalam Pencegahan Pembentukan Air Asam Tambang Menggunakan Metode Free Draining Column Leach Test Farhan, Muhammad; Nugraha, Candra
Rekayasa Hijau : Jurnal Teknologi Ramah Lingkungan Vol 5, No 2 (2021)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/jrh.v5i2.136-149

ABSTRAKUpaya pencegahan pembentukan air asam tambang dapat dilakukan dengan metode dry cover yang dilakukan dengan menutup batuan yang berpotensi membentuk asamÂ (PAF)Â dengan batuan yang tidak berpotensi membentuk asamÂ (NAF).Â Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan fly ash dan bottom ash sebagai NAF dalam mencegah pembentukan AAT dengan cara mengurangi kontak antara mineral sulfida dengan air dan oksigen.Â Metode Free Draining Column Leach Test digunakan untuk memprediksi pembentukan AAT yang terbentuk. Simulasi perbedaan perlakuan sampel digunakan dengan 2 variasi pelapisan sampel NAF dan 3 variasi pencampuran sampel NAF.Â Hasilsimulasi menunjukkanÂ bahwaÂ dengan variasi pelapisan sampel NAF didapatkan kualitas air yang lebih baik. Penggunaan variasi pelapisanmeningkatkan nilai pH, menurunkan nilai TDS serta DHL sebagai hasil oksidasi pirit didalam batuan.Â Untuk menunjang hasil analisis kualitas air, pengujianÂ statistika juga digunakan untuk mengetahui perbedaan dari variasi penggunaan fly ash dan bottom ash terhadap perubahan nilai pH, TDS dan DHL yangÂ dihasilkan.Â Kata kunciÂ : Fly ash, Bottom ash, pH, TDS, DHLÂ ABSTRACTAcid mine drainage prevention efforts can be carried out by the method of the dry cover which is done by closing the rock that is potentially acid forming (PAF) with theÂ non-potentially acid forming rockÂ (NAF). This study aims to determine the effect of the fly ash and bottom ash as NAF in preventing the formation of AMD byÂ reduceÂ contact between the sulfide mineralsÂ withÂ water and oxygen. The method of Free Draining Column Leach Test is used to predict the formation of AMDÂ formed. Simulated difference in sample treatment is used with 2 variations in the coating samples of NAF and 3 variations of the mixing a sample of NAF. The simulation results show that with the variation of the coating sample of NAF obtained better water quality. The use of variations of the coating increases pH value, lower the value of TDS as well as DHL as a result of oxidation of pyrite. To support the results of water quality analysis, the statisticsÂ testÂ is also used to determine the difference from the variation of the use of fly ash and bottom ash to change the pH value, TDS and DHL that is produced.Keywords: Fly ash, Bottom ash, pH, TDS, DHL

Identifikasi Genangan Banjir yang Terjadi di Kecamatan Cikampek, Kabupaten Karawang Deandra Auliana Izmah; Eka Wardhani; M. Candra Nugraha
Journal of Mechanical Engineering and Mechatronics Vol 4, No 2 (2019): JOURNAL OF MECHANICAL ENGINEERING AND MECHATRONICS
Publisher : President University

Cikampek District is one of the sub-districts in the Karawang Regency located in the Southeast part of the Karawang Regency area. Cikampek sub-district is one of the areas that is growing rapidly due to the development of industrial allotment areas and urban settlements. This study aims to determine the flood inundation that must be addressed immediately. The research method was carried out by observation in the field and interviews with related parties. Based on the results of research in the District of Cikampek, there was inundation with an area of 274 Ha, inundation height of 10-40 cm, drainage time of 3 hours / day, and inundation frequency (9 times / year) due to overflow of secondary drainage channel namely Cikaranggelam River. There are three priority areas that the drainage system must immediately address, namely Desa Cikampek Selatan, Dawuan Tengah and Dawuan Barat.

Analisis Sistem Tanggap Darurat Tumpahan B3 Studi Kasus di Perusahaan Manufaktur Mochamad Ulwan Pasha; Juli Soemirat; M Candra Nugraha Deni
Jurnal Reka Lingkungan Vol 10, No 1 (2022)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekalingkungan.v10i1.23-34

AbstrakIndustri semakin banyak menggunakan material dan proses yang tergolong berbahaya yang dikelompokan sebagai bahan berbahaya dan beracun (B3). Setiap proses produksi memiliki risiko terjadinya kecelakaan kerja yang diakibatkan oleh B3 hingga mengakibatkan keadaan darurat yang dapat merugikan secara kesehatan, material, dan finansial. PT X merupakan perusahaan yang bergerak di bidang manufaktur, dengan terdapat 5 proses produksi diantara nya: gudang penyimpanan barang produksi, konstruksi, nailing, assembling, dan finishing. Dalam tahap tersebut terdapat B3 seperti nikel, chromium, asam sulfat, dan solar yang digunakan. Oleh karena itu, perlu dilakukan evaluasi sistem tanggap darurat tumpahan B3 pada PT X, yang terdiri dari manajemen tanggap darurat, sarana dan prasarana tanggap darurat, dan pengelolaan B3 itu sendiri. Evaluasi dilakukan dengan membandingkan kondisi eksisting dengan peraturan diantaranya PermenLHK 74/2019, PermenLH 03/2008, dan beberapa National fire protection association (NFPA). Hasil evaluasi menunjukan nilai penerapan sistem tanggap darurat B3 di PT X sebesar 49,82% dikarenakan terdapat beberapa komponen yang belum tersedia dan beberapa komponen yang tidak sesuai standar. Oleh karena itu diperlukan suatu sistem tanggap darurat tumpahan B3 berupa rencana pengelolaan kedaruratan (RPK), mulai dari merencanakan tindakan pencegahan tumpahan, tindakan pada saat terjadi tumpahan, hingga pada pemulihan pasca tumpahan B3. Kata kunci: Industri, B3, Sistem Tanggap Darurat, rencana pengelolaan kedaruratanAbstractHazardous chemicals are substances that are classified known as hazardous substances. Production processes using such substances may carry a risk of work accidents caused by them resulting in emergencies that can be detrimental to health, and cause material, and financial losses. PT X is a manufacturing company, with 5 production processes i.e: warehouse storage of production, construction, nailing, assembling, and finishing, where hazardous materials such as nickel, chromium, sulfuric acid, and diesel are being used. Evaluation of hazardous materials spill emergency response system at PT X consisting of emergency response management, facilities and infrastructure, and proper management were conducted by comparing existing conditions with regulations including PermenLHK 74/2019, PermenLH 03/2008, and several National fire protection associations. The results showed that the implementation of these hazardous materials emergency response system at PT X only comply for 49.82% due to lack of some components and some were not in accordance with the exisiting standards. Hence the need for a comprehensive hazardous materials emergency response system in the form of an emergency management plan, starting from planning spill prevention measures, taking action in the event of a spillage to post hazardous materials spill recovery.Keywords: Industry, Hazardous Materials, Emergency Response, Emergency Management Plan

Penentuan Metode Intensitas Hujan Berdasarkan Karakteristik Hujan dari Stasiun Pengamat Hujan Disekitar Kecamatan Karawang Timur Melisa Permatasari; M. Candra Nugraha; Etih Hartati
Jurnal Serambi Engineering Vol 5, No 1 (2020)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v5i1.1603

The rain intensity is the high rainfall in unit of time. The length of rain will be reversed by the amount rain intensity. The shorter time the rain lasts, the greater of the intensity and re-period of its rain. The value of rain intensity is required to calculate the flood discharge plan on the drainage system planning area in East Karawang district. Determining the value rain intensity is required the maximum daily rainfall data obtained from the main observer stations in the Plawad station planning area. The method of determination rain intensity analysis can be done with three methods: Van Breen, Bell Tanimoto and Hasper der Weduwen. Selected method is based on the smallest deviation value. Determination deviation value is determined by comparing rain intensity value of Van Breen method, Bell Tanimoto, Hasper der Weduwen. By comparing rain intensity value of the Van Breen method, Bell Tanimoto, Hasper der Weduwen with the results of calculating three methods through the method approach Talbot, Sherman and Ishiguro. Calculation results show that the method of rain has smallest deviation standard is method Van Breen with Talbot approach for rainy period (PUH) 2, 5, 10, 25, 50 and 100 years.

Hubungan Perubahan Tata Guna Lahan dengan Debit Air Limpasan pada Kawasan Hunian Pantai Indah Kapuk 2 Alfianabila Yusfiaka; Etih Hartati; M. Candra Nugraha
Jurnal Serambi Engineering Vol 5, No 1 (2020)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v5i1.1598

The construction of the residential and commercial area of Pantai Indah Kapuk (PIK) 2 Cluster “D” is located in the part of two sub-district, which is Sub-district of Kosambi and Sub-district of Teluknaga. PIK 2 Cluster “D” has an area of 508,59 Ha. With the construction of PIK 2 Cluster “D”, there will be a change of land use and an enchancement of run off water. The relationship between the change of land use and the enhancement of run off water can be seen from run off peak deviation for reset time T year (Qr) on existing condition with planning condition after the change of land use. The method used is the rational method which is estimating run off peak. There is an enhancement off run off coefficient value (C) on existing condition about 0,46 and 0,81 on planning condition which causing an enhancement off run off peak in planning area as the effect of the change of land use as Q = 87,59 m3/second. The enhancement of run off coefficient value as the effect of the change of land use is directly proportional with the enhancement of run off peak in case study residential and commercial area of PIK 2 Cluster “D”.

Analisis Karakteristik Curah Hujan pada Kawasan Hunian dan Komersial Pantai Indah Kapuk (PIK) 2 Cluster “C” Nur Afifah Sari; Etih Hartati; M. Candra Nugraha
Jurnal Serambi Engineering Vol 5, No 1 (2020)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v5i1.1600

Based on the hydrological cycle, one of the main water sources is rainwater. weather or climate conditions that occur will greatly affect the nature and condition of a rain or rainy season. On a global scale, the existence of water naturally is constant, only occurs in variations both in time and space on a regional scale. Analysis of the rainfall characteristics of Pantai Indah Kapuk (PIK) residential and commercial areas 2 Cluster "C" in Tangerang Regency, Banten Province, is for to find out the intensity of rainfall used for drainage planning. The daily rainfall data used includes 5 rain catching stations with a duration of 25 years (1994 - 2018). The Van Breen method is used to process rainfall data within a certain period into rainfall intensity with various times for drainage planning used. In the planning of drainage channels the rainfall return period used is PUH 2 for tertiary lines with selected rainfall data of 192 mm / day and PUH 5 for secondary lines with selected rainfall data of 219 mm / day. The IDF curve shows that rainfall intensity is affected by the time and return period of rainfall, where the shorter the rainfall time and the greater the return period of rainfall, the higher the intensity of rainfall produced.

Identifikasi Penentuan Skala Prioritas Penanganan Genangan Atau Banjir Di Kecamatan Karawang Barat Trisha Ajeng Larasaty; M. Candra Nugraha; Etih Hartati
Jurnal Serambi Engineering Vol 5, No 4 (2020)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v5i4.2318

West Karawang District is a center of local activities with a service scope the whole Karawang Regional with most populous region by 142.509 persons. Based on Karawang Regional Spatial Plans Year 2011 – 2031, West Karawang Sub-district is a flooded vulnerable area when rain season. That area is along the Citarum River stream with. Priority scale determination of flood is done with comparison method of the existing flood condition with the parameters in Peraturan Menteri Pekerjaan Umum dan Perumahan Rakyat No.12 Tahun 2014 tentang Penyelenggaraan Sistem Drainase Perkotaan. There were 13 flood points in West Karawang District with the highest priority scale, Tanjungpura Sub-District. In Tanjungpura Sub-District, there are 3 flood points with a height of 50-30 cm, 1 Ha of flood area, and the length of flood lasts for 10 hours. The puddle is located in a densely populated residential area which causes a lot of losses to residents.

Tinjauan Kebijakan Pengelolaan Limbah Medis Infeksius Penanganan Corona Virus Disease 2019 (Covid-19) Candra Nugraha
Jurnal Untuk Masyarakat Sehat (JUKMAS) Vol 4, No 2 (2020): Jurnal Untuk Masyarakat Sehat (JUKMAS)
Publisher : LPPM Universitas Respati Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52643/jukmas.v4i2.1004

Satu aspek penting dalam penangan wabah Corona Virus Disease 2019 (Covid-19) adalah penangangan limbah medis yang dihasilkan, baik dari pasien maupun petugas medis. Pemerintah pusat dan Pemerintah Daerah Provinsi Jawa Barat telah mengeluarkan kebijakan-kebijakan terkait pengelolaan limbah medis infeksius yang berasal dari fasilitas pelayanan kesehatan, rumah sakit darurat, maupun rumah karantina/isolasi mandiri.Terdapat 5 (lima) kebijakan dari pemerintah pusat dan 2 (dua) kebijakan Pemerintah Provinsi Jawa Barat yang ditinjau berdasarkan tahapan pengelolaan limbah B3.Hasil tinjauan menujukkan bahwa, meskipun kebijakan dikeluarkan tidak secara terpadu, namun tahapan pengelolaan limbah medis infeksius telah ditetapkan dengan cukup jelas dan dapat dijadikan sebagai acuan. Acuan ini sangat penting untuk pelaksanaan pengelolaan limbah medis infeksius pada masa darurat sekarang ini, untuk menghindari terjadinya penyebaran virus melalui media limbah medis.

Kajian Pengaruh Kadar dan Ukuran Kapur dalam Netralisasi Potensi Keasaman Tailing dari Kegiatan Pertambangan Emas Plucheria Pritta Aquila; Candra Nugraha
Jurnal Serambi Engineering Vol 8, No 1 (2023): Januari 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i1.5576

AbstractMineral mining activities will leave waste rock known as tailings, which has small particle sizes and can trigger an oxidation reaction of the sulfide minerals contained therein and produce AMD. Laboratory tests have been carried out to determine the effect of the additional lime in terms of rate and particle size to neutralize the acid water formed through qualitative and quantitative mineral testing and static geochemical testing for various combinations of lime rates and sizes. This study used lime with a CaO content of 90.9% and tailings with a sulfur content of 4.88%. Subsequently, the pasta pH-EC, ABA, and NAG tests were conducted on a mixture of lime and tailings with lime sizes ranging from 8-16 to 50-100 mesh and a lime: tailings ratio of 2.5 to 15 kg/ton tailings. The test results show lime with a size of 50–100 mesh with a lime: tailings composition of 15 kg/ton tailings provides the most optimal effect in neutralizing potential acidity from tailings indicated by a pH value of 7.18. This study is expected to provide input in the management of tailings in mining to avoid acidic water which has the potential to dissolve metal content in tailings that have a negative impact.Keywords: AMD, lime content, grain size, Ph, tailing

Kajian Pengaruh Kadar dan Ukuran Kapur dalam Netralisasi Potensi Keasaman Tailing dari Kegiatan Pertambangan Emas Plucheria Pritta Aquila; Candra Nugraha
Jurnal Serambi Engineering Vol 8, No 1 (2023): Januari 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i1.5576

AbstractMineral mining activities will leave waste rock known as tailings, which has small particle sizes and can trigger an oxidation reaction of the sulfide minerals contained therein and produce AMD. Laboratory tests have been carried out to determine the effect of the additional lime in terms of rate and particle size to neutralize the acid water formed through qualitative and quantitative mineral testing and static geochemical testing for various combinations of lime rates and sizes. This study used lime with a CaO content of 90.9% and tailings with a sulfur content of 4.88%. Subsequently, the pasta pH-EC, ABA, and NAG tests were conducted on a mixture of lime and tailings with lime sizes ranging from 8-16 to 50-100 mesh and a lime: tailings ratio of 2.5 to 15 kg/ton tailings. The test results show lime with a size of 50–100 mesh with a lime: tailings composition of 15 kg/ton tailings provides the most optimal effect in neutralizing potential acidity from tailings indicated by a pH value of 7.18. This study is expected to provide input in the management of tailings in mining to avoid acidic water which has the potential to dissolve metal content in tailings that have a negative impact.Keywords: AMD, lime content, grain size, Ph, tailing

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