Studi Penyisihan Mikroplastik Pada Instalasi Pengolahan Air Babat Perumda Air Minum Kabupaten Lamongan

Khusnia, Arifatul (2023) Studi Penyisihan Mikroplastik Pada Instalasi Pengolahan Air Babat Perumda Air Minum Kabupaten Lamongan. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Mikroplastik ditemukan di perairan seluruh dunia, termasuk sungai-sungai di berbagai negara. Di Indonesia, dari 68 sungai strategis nasional yang tersebar di 24 provinsi, ditemukan mikroplastik dengan kelimpahan mulai dari 12 hingga 636 partikel/100 L. Hal ini menjadi masalah karena sebagian besar sungai di Indonesia digunakan sebagai sumber air baku pada instalasi pengolahan air. Salah satunya adalah Bengawan Solo yang digunakan sebagai air baku pada Instalasi Pengolahan Air (IPA) Babat. IPA Babat merupakan IPA terbesar yang dimiliki oleh Perumda Air Minum Kabupaten Lamongan dengan kapasitas produksi 220 Liter/detik. Penelitian ini bertujuan untuk menentukan kelimpahan, karakteristik, jenis mikroplastik dan efisiensi penyisihan mikroplastik pada setiap unit pengolahan air di IPA Babat. Sampling air dilakukan di inlet prasedimentasi, outlet prasedimentasi, outlet sedimentasi, outlet filtrasi dan outlet reservoir. Sedangkan sampling lumpur dilakukan di unit prasedimentasi dan unit sedimentasi. Pada sampel air diambil sebanyak empat kali, dua kali setelah hujan dan dua kali saat tidak hujan. Sedangkan sampel lumpur diambil satu kali pada saat pengurasan lumpur. Ekstraksi sampel mikroplastik dilakukan dengan Wet Peroxyde Oxydation (WPO), Density separation dan filtrasi. Karakteristik mikroplastik berupa ukuran, bentuk dan warna didapatkan dari pengujian secara mikroskopik. Sedangkan jenis mikroplastik didapatkan dari uji FTIR.
Kelimpahan mikroplastik pada air baku IPA Babat sebanyak 21 partikel/L. Mikroplastik berdasarkan ukurannya paling banyak ditemukan berukuran 1 – 5 mm (43 - 57%), paling banyak ditemukan dalam bentuk fiber (83 – 92%) dan warna hitam (72 – 83%). Kelimpahan mikroplastik pada lumpur prasedimentasi sebesar 710 Partikel/kg berat kering, berdasarkan ukurannya didominasi 350 µm – 1 mm (44%), paling banyak ditemukan dalam bentuk fiber (51%) dan warna hitam (54%). Sedangkan pada lumpur sedimentasi kelimpahan ditemukan sebanyak 635 Partikel/kg berat kering lumpur, berdasarkan ukurannya didominasi 1 – 5 mm (53%), paling banyak ditemukan dalam bentuk fiber (92%) dan warna hitam (64%). Jenis plastik yang ditemukan adalah Polypropylene, Poly(ethylene:propylene) dan Low Density Polyethilene. Efisiensi penyisihan unit prasedimentasi sebesar 24%, unit koagulasi-flokulasi dan sedimentasi 34%, unit filtrasi 14% dan unit reservoir 11%. Sehingga total penyisihan mikroplastik sebesar 62% karena di outlet reservoir masih ditemukan mikroplastik sebesar 8 partikel/L.
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Microplastics are present in the world's waterways, including rivers in various countries. In Indonesia, from 68 nationally strategic rivers spread across 24 provinces, microplastics were found with abundances ranging from 12 to 636 particles/100 L. This is a problem because the majority of rivers in Indonesia serve as raw water sources for Water Treatment Plants (WTPs). One of them is Bengawan Solo that used as raw water in Babat Water Treatment Plant (WTPs). Water Treatment Plant (WTP) Babat is the largest WTP owned by Perumda Air Minum Kabupaten Lamongan with capacity of 220 Liters/second. This research aims to determine the abundance, characteristics, types, and removal efficiency of microplastics in each water treatment units at WTP Babat.
Water samples will be collected at pre-sedimentation inlet, pre-sedimentation outlet, sedimentation outlet, filtration outlet and reservoir outlet. Sludge samples will be collected from the pre-sedimentation and sedimentation units. Water sample will be collected twice after it rained and twice when it did not. The sludge sample was taken once at the time of sludge drainage. Wet Peroxide Oxidation (WPO), density separation and filtration will be used to extract microplastic samples. The microscopic analysis measures microplastics' size, shape, and color to determine their characteristics. The microplastic polymer will be determined by FTIR analysis.The abundance of microplastics in the WTP Babat raw water was 21 particles/L. Microplastic based on its size is most commonly found in size 1 - 5 mm (43 - 57%), based on its shape dominated by fiber (83-92%) with the most color is black (72-83%). Microplastic abundance in prasredimentation sludge was 710 particles/kg sludge dry weight, based on its size dominated 350 µm - 1 mm (44%), the most shape is fiber (51%) and color is black (54%). Meanwhile, the abundance of sedimentation sludge was 635 particles/kg sludge dry weight, based on its size dominated by 1-5 mm (53%), the most shapes is fiber (92%) and color is black (64%). The types of plastic found were Polypropylene, Poly(ethylene:propylene) and Low Density Polyethylene. Removal Efficiency of pre-sedimentation unit 24%, coagulation-bloculation and sedimentation units 34%, filtration unit is 14% and reservoir unit is 11%. Therefore, total removal of microplastics is 62% because in the reservoir outlet microplastics are still found 8 particles/L.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	characteristics, efficiency, FTIR analysis, microplastic, WTP Babat, analisis FTIR, efisiensi, IPA Babat, karakteristik, mikroplastik.
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD259.2 Drinking water. Water quality T Technology > TD Environmental technology. Sanitary engineering > TD427.P62 Microplastics--Environmental aspects. T Technology > TD Environmental technology. Sanitary engineering > TD433 Water treatment plants
Divisions:	Faculty of Civil Engineering and Planning > Environment Engineering > 25201-(S1) Undergraduate Thesis
Depositing User:	Arifatul Khusnia
Date Deposited:	28 Jul 2023 06:49
Last Modified:	28 Jul 2023 06:49
URI:	http://repository.its.ac.id/id/eprint/99576

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