Choirur Rosidah, Noven Pramitasari, Audiananti Meganandi Kartini, Tika Kumalasari, Intan Har Aselna

Pengaruh Waktu Aerasi dan Sedimentasi Terhadap Penurunan Kadar Besi (Fe) Pada Air Sumur

Introduction

Pengaruh waktu aerasi dan sedimentasi terhadap penurunan kadar besi (fe) pada air sumur. Kaji pengaruh waktu aerasi & sedimentasi dalam menurunkan kadar besi (Fe) pada air sumur di Lumajang. Efisiensi 70.74-86.27% untuk kualitas air minum.

Abstract

Air sumur di salah satu perumahan di Kabupaten Lumajang memiliki kadungan besi (Fe) sebesar 3,7 mg/L. Kandungan besi pada air sumur tersebut telah melebihi dari syarat yang telah ditetapkan. Berdasarkan Peraturan Menteri Kesehatan Republik Indonesia Nomor 492/MENKES/PER/IV/2010 tentang persyaratan kualitas air minum kandungan besi (Fe) pada air yaitu 0,3 mg/L. Kandungan besi dalam air dapat diturunkan dengan menggunakan metode aerasi, sedimentasi dan filtrasi. Proses aerasi pada penelitian ini menggunakan diffuser Aerator untuk melarutkan oksigen ke dalam air sehingga meningkatkan kadar oksigen terlarut dalam air. Proses sedimentasi menggunakan bak pengendap untuk untuk mengendapkan padatan terlarut dan tersuspensi sedangkan proses filtrasi dengan menggunakan media zeolit dan pasir silika serta kerikil sebagai media penyangga. Total waktu yang digunakan untuk proses aerasi dan sedimentasi yaitu 35 menit. Nilai efisiensi penyisihan besi yang tertinggi yaitu pada reaktor A1B4 dengan waktu aerasi selama 10 menit dan waktu sedimentsi selama 25 menit. Nilai efisiensi penyisihan besi yang didapatkan ada sebesar 70,74 – 86,27% Berdasarkan hasil analisis statistik waktu aerasi dan waktu sedimentasi memiliki pengaruh yang signifikan terhadap penurunan kadar besi (Fe) pada air sumur   Kata Kunci: Aerasi; Air  Sumur; Besi; Filtrasi; Sedimentasi.

Review

This study presents a relevant investigation into the efficacy of aeration and sedimentation for reducing elevated iron (Fe) levels in well water from a residential area in Lumajang. The initial iron concentration of 3.7 mg/L significantly exceeds the Indonesian drinking water standard of 0.3 mg/L, highlighting the practical importance of this research. The chosen methodology, involving aeration via a diffuser and subsequent sedimentation, followed by filtration, is a common and appropriate approach for addressing such water quality issues. The research effectively identifies specific operational parameters that yield significant iron removal. Optimal performance was observed with 10 minutes of aeration and 25 minutes of sedimentation, resulting in iron removal efficiencies between 70.74% and 86.27%. The statistical analysis further supports that both aeration and sedimentation times are significant factors influencing the reduction of iron content. These findings provide a clear and quantifiable demonstration of a viable treatment strategy for iron-laden well water. While the study successfully demonstrates the impact of aeration and sedimentation, the abstract could benefit from greater clarity regarding the role of filtration. It is mentioned as part of the overall process using zeolite, silica sand, and gravel, but its contribution to the reported removal efficiency is not explicitly quantified or differentiated from the aeration-sedimentation steps. Furthermore, to fully assess the practical success, explicitly stating whether the final iron concentration after treatment consistently meets the 0.3 mg/L standard, rather than just providing a percentage removal, would significantly strengthen the conclusions and real-world applicability of the findings.

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