KAJIAN TEKNIS DIMENSI KOLAM PENGENDAPAN DI SETTLING POND 71 C PT. PERKASA INAKAKERTA KECAMATAN BENGALON, KABUPATEN KUTAI TIMUR, PROVINSI KALIMANTAN TIMUR

ISNAENI, ISNAENI (2015) KAJIAN TEKNIS DIMENSI KOLAM PENGENDAPAN DI SETTLING POND 71 C PT. PERKASA INAKAKERTA KECAMATAN BENGALON, KABUPATEN KUTAI TIMUR, PROVINSI KALIMANTAN TIMUR. Other thesis, UPN "Veteran" Yogyakarta.

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Abstract

Kajian teknis dimensi kolam pengendapan dilakukan pada inpit dump 71 dan Pit 71 N PT. Perkasa Inakakerta Kabupaten Kutai Timur Provinsi Kalimantan Timur. Terletak antara 117°35’56” - 117°44’14” BT dan 0°44’41” - 0°53’23” LS,kegiatan tambang batubara di PT. Perkasa Inakakerta menggunakan sistem tambang terbuka dengan metode open pit. Kajian ini dilakukan untuk mengetahui kolam yang meliputi karakter air permukaan tercemar, jenis pencemar, ukuran butir pencemar, macam dan jumlah kougulan yang digunakan, geometri kolam pengendapan, periode pengerukan kolam pengendapan dengan melakukan pengamatan, pengukuran, pengambilan conto, pengujian dilaboratorium, kajian ini merupakan bagian dari water management. Berdasarkan curah hujan selama 6 tahun (2009-2014) curah hujan rencana adalah 126,4 mm/hari, intensitas curah hujan 43,74 mm/jam dengan periode ulang hujan 3 tahun dan resiko hidrologi sebesar 97,39 %. Sumber air kolam pengendapan berasal dari hasil pemompaan dengan debit 729,27 m/jam. Perameter kualitas air didasarkan pada nilai pH 6, TSS antara 22,8 Mg/l –177 Mg/l, Besi (Fe) antara 0,4 – 2,3 Mg/l, Mangan (Mn) 0,1 – 0,4 Mg/l. Dimensi kolam pengendapan 71 C memiliki luas 7.644 m2 volume 31.734m terlalu luas untuk menampung air hasil pemompaan sehingga perlu perbaikan dimensi dengan luas 5.505 m2 dan volume 24.663 m3. Koagulan yang digunakan untuk menetralkan air asam adalah kapur padam (CaO) sebanyak 71 kg/jam. Alat yang digunakan untuk perawatan (treatment) menggunakan Backhoe PC 200, waktu pengerukan didasarkan pada kecepatan pengendapan (vt) 2,8 x 10, waktu yang dibutuhkan air untuk mengendapn (tv) 28,76 menit, kecepatan air dalam kolam kompartemen 1 (vh) 1,66 x 10-4, kompartemen 2 1,58 x 10-4, kompartemen 3 1,48x 10 -4 waktu yang dibutuhkan air keluar dari kolam (th) kompartemen 1 68 jam,kompartemen 2 79 jam, kompartemen 3 85 jam, padatan yang berhasil diendapkan dalam 1 hari kompartemen 1 11, 83 m3 kompartemen 2 10,62 m3, kompartemen 310,54 m3 dan waktu pengerukan kompartemen 1 13 bulan sekali, kompartemen 215 bulan sekali dan kompartemen 3 16 bulan sekali. Technical study carried out on the dimensions of the settling ponds inpit Pit dump 71 and 71 N PT. Perkasa Inakakerta East Kutai in East Borneo province. Located between 117 ° 35'56 "- 117 ° 44'14" E and 0 ° 44'41 "- 0 ° 53'23" latitude, coal mining activities at PT. Perkasa Inakakerta system using open pit mine with open pit methods. This study was conducted to determine the condition of the pool which includes the character of surface water is polluted, the type of contaminants, grain size contaminants, kind and amount coagulant used, the geometry of the settling ponds, the period of dredging the settling ponds to make observations, measurements, taking samples, testing laboratory, this study a part of water management. Based on the rainfall during the six-year (2009-2014) plan rainfall is 126,4 mm /day, the intensity of rainfall is 43,74 mm / hours with 3-year return period rainfall and hydrology risk by 97,39%. The source of water comes from the settling pond discharge pumping with 729.27 m3 /hours. Parameters of water quality based on the value of pH 6, TSS was 22.8 Mg / l - 177 Mg / l, iron (Fe) between 0.4 to 2.3 Mg / l, Manganese (Mn) from 0.1 to 0.4 mg / l. Dimensions settling ponds 71 C has an area of 7.644mv2 31.734 m volume is too broad to accommodate the results of pumping water that needs improvement with broad dimensions of 5505 m2 and 24 663 m3 volume.Coagulant used to neutralize acidic water is quenched lime (CaO) as much as 71 kg/hours. The tools used for treatment using Backhoe PC 200, when dredging is based on sedimentation velocity (vt) 2.8 x 10-3, the time it takes water to sedimentation (tv) 28.76 minutes, the speed of the water in the pond compartment 1 1.66 x 10-4, 1.58 x 10-4 second compartment, a compartment 3 1,48 x 10 the time it takes the water out of the pool (th) 68 hours a compartment 1,compartment 2 79 hours, 3 compartments 85 hours, solids were successfully deposited in the compartment 1 11,83 m3 compartment 2 10,62 m, compartment 3 10,54 m3 and a dredging compartment 1 13 months, compartment 2 15 months and compartment 3 16 months.

Item Type: Thesis (Other)
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Eko Yuli
Date Deposited: 09 May 2016 07:16
Last Modified: 09 May 2016 07:16
URI: http://eprints.upnyk.ac.id/id/eprint/407

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