EVALUASI KINERJA INSTALASI PENGOLAHAN AIR LIMBAH DALAM MENRUNKAN KADAR NH3 DENGAN BERBAGAI WAKTU AERASI PADA AIR LIMBAH RSUD WATES, KABUPATEN KULONPROGO

Abstract

Pengolahan limbah cair RSUD Wates menggunkan instalasi Pengolahan Air Limbah dengan sequenching batch reactor (SBR). Selama proses pengoperasianIPAL dengan lama waktu aerasi 60 menit parameter NH3 masih melebihi nilai ambang batas (0,1Mg/1). Keberadaan Amoniak (NH3) dalam limbah cair rumah sakit dapat menyebabkan penurunan kadar oksigen terlarut, sehingga dapat merusak kehidupan dalam badabn air penerima limbah cair rumah sakit tersebut. Tujuan peneltian ini adalah utnuk mengetahui perbedaan rata-rata penuruna kadar NH3 air limbah antara waktu aerasi 60 menit dan 90 menit pada air limbah Rumah Sakit Wates. Dari hasil peneltian diperoleh bahwa rata-rata penurunan kadar NH3 effluen dengan lama aerasi 60 menit adalah 32,16 mg/l, sedangkan rata-rata penurunan kadar NH,effluent dengan lama aerasi 90 menit sebesar 35,62 mg/l. Hasil analisis dengan menggunakan 't' test dua sampel bebas dengan x =5% diperoleh probabilitas = 0,0001 sehingga disimpulkan bahwa ada perbedaan rata-rata penurunan kadar NH3 effluen yng signifikan antara lama waktu aerasi 90 menit dan 60 menit pada proses pengolahan limbah cair di RSUD Wates. Diharapkan pengolahan air limbah di RSUD Wates menggunakan waktu aerasi 90 menit agar dapat menghasilkan air limbah teolah yang mempunyai kadar NH3 di bawah NAB. Kata Kunci: NH3 waktu aerasi,limbah cair rumah sakit PERFORMANCE EVALUATION OF SEWAGE PURIFICATION INSTALATION IN REDUCING NH3 CONTENTS AMONG AERATION TIME IN THE SEWAGE OF WATES DISTRIC GENERAL HOSPITAL, KULONPROGO DISTRIC. Purifying liquit sewages in Wates Hospital requires Seweage purification Instalation (IPAL)process with Batch Reactor System (SBR). During the process, by operating IPAL within 60 minutes of aeration times NH3 parameter still goes beyond grade limits. The remains of amoniacs (NH3) within liquit sewages of the hospital can cause reduction in dissolved oxygen contens,which ultimately damage the livings in the water body,which is a liquit sewages receiver, in the hospital. This research aimed at acknowledging the average rates of reduction in NH3 contents within liquid sewages with the application of IPAL within 60 minutes of aeration time in comparison with 90 minutes of aeration time in Wates Distric General Hospital. The Research found that the average rates of reduction within the effluence of NH3 contents with 60 minutes aeration times was 32,61 mg/l,while whitin 90 minutes aeration times resulted in 35,33mg/l. On analysis, by applying formula of t-test two independent sample with significants rates 5% the amount of probability was 0,0001. Thus,it is concluded that these difference in operating IPAL Between 60 minutes aeration times for the average rates of reductions within NH3 contents in sewages purification in Wates Distric General Hospital. IPAL Wates Distric General Hospital was wished wear 90 minutes of aeration times in the purifying liquit sewages. Keyword : NH3 aerations times,hospital liquit sewages