SULAIMAN HAMZANI, ST.MT Dosen Pembimbing 1 IMAM sANTOSO, S.KM.M.Kes Dosen Pembimbing 2 SRI MAULIDA Pengarang

KEMENKES REPUBLIK INDONESIA POLITEKNIK KESEHATAN BANJARMASIN PROGRAM STUDI DIPLOMA IV KESEHATAN LINGKUNGAN TAHUN 2017 ABSTRAK SKRIPSI SRI MAULIDA EFEKTIFITAS CHEMICAL CHLORINE TERHADAP PENURUNAN BAKTERI COLIFORM PADA AIR OUTLET WATER TREATMENT PLANT T-300 DI PT. ADARO INDONESIA (Sulaiman Hamzani; Imam Santoso) xiii + 73 Halaman; 14 Tabel; 18 Gambar; 11 Lampiran Water Treatment Plant (WTP T-300) merupakan tempat pengolahan air tambang layak minum yang dimiliki oleh perusahaan tambang PT. Adaro Indonesia. Pada air olahan yang dihasilkan harus memenuhi beberapa parameter, salah satunya adalah parameter mikrobiologi. Dalam parameter mikrobiologi ada angka Coliform. Pada air olahan periode Mei dan Juni 2016 masih ditemukan angka Coliform sebesar 48 dan 14 koloni. Penelitian ini bertujuan mengetahui efektifitas penggunaan dosis chemical chlorine terhadap penurunan bakteri coliform pada air olahan Water Treatment Plant T-300 di PT. Adaro Indonesia. Desain/rancang bangun penelitian ini adalah pretes-postes dengan kelompok kontrol (pretest-postest with control group design). Sampel penelitian ini adalah air olahan WTP T-300 di PT. Adaro Indonesia menggunakan bahan chemical chlorin dengan variasi dosis 2ml/l, 2,2ml/l, 2,4ml/l, 2,6ml/ldan 2,8 ml/l. Hasil penelitian ini menunjukkan ada perbedaan penurunan bakteri coliform antara sebelum dan sesudah pengolahan pada kelompok perlakuan pada air sampel WTP T-300 dilihat dari hasil uji friedman menunjukan nilai p=0,000 < α = 0,05 dengan dosis optimum 2,7 ml/l sesuai dengan uji regresi linier. Kata Kunci : Chemical Clorin, Bakteri Coliform, WTP Adaro Kepustakaan : 24 ( 1991-2013) viii HEALTH MINISTRY OF THE REPUBLIC OF INDONESIA BANJARMASIN HEALTH POLYTECHNIC ASSOCIATE DEGREE PROGRAMME ENVIRONMENTAL HEALTH YEAR 2017 ABSTRACT UNDERGRADUATE THESIS CHEMICAL CHLORINE EFFECTIVENESS TO DECREASE OF COLIFORM BACTERIA ON WATER TREATMENT PLANT OUTLET OF T-300 IN PT. ADARO INDONESIA (Sulaiman Hamzani, Imam Santoso) Xiii + 73 Pages; 14 Table; 18 Pictures; 11 Appendix Water Treatment Plant (WTP T-300) is the place for drinkable processing water from mine owned by a mining company PT. Adaro Indonesia. In the processed water produced it must meet several parameters, one of which is the microbiological parameters, one of those is the microbiological parameters. In the microbiological parameter there is a Coliform number. In the processed water period May and June 2016 have beenfound Coliform number of 48 and 14 colonies. This study aims to determine the effectiveness of chemical dosage of chlorine to the decrease of coliform bacteria in processed water of T-300 Water Treatment Plant at PT. Adaro Indonesia. The design of this research is pretest- postest with control group design. The sample of this research is processed water of WTP T-300 at PT. Adaro Indonesia using chemical chlorine with the variate dose of 2ml / l, 2,2ml / l, 2,4ml / l, 2,6ml / l and 2,8 ml / l. The results of this study indicate that there is a difference of coliform bacterial decrease between before and after processing in the treatment group in water sample WTP T-300 seen from friedman test showed p value = 0,000 <α = 0.05 with optimum dose 2.7 ml / l according With linear regression test. Keywords: Chemical Clorin, Coliform Bacteria, WTP Adaro Literature: 24 (1991-2013)