CD Skripsi

Pengaruh Variasi Dosis Koagulan Poly Aluminium Chloride (Pac) Pada Proses Pengolahan Lengkap Air Sungai Siak Terhadap Potensi Pembentukan Trihalometan (Thm)

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ABSTRACT

Siak River water has a high natural organic matter (NOM) content, which has the
potential to form disinfection by-products in the form of trihalomethanes (THM)
when it reacts with chlorine. THM are carcinogenic and have fatal impact on
human health, so treatment is necessary before disinfection. This study aims to
calculate the efficiency of organic and color removal in Siak River water using
varying doses of polyaluminum chloride (PAC) and to determine the PAC coagulant
dose in reducing the potential for THM formation using three empirical
approaches, namely the Stephanie, Ozdemir, and Zhang equations, with the UV-Vis
spectrophotometry method at wavelengths of 250 nm–450 nm. This study was
conducted through a complete treatment process, namely coagulation, flocculation,
sedimentation, filtration, and disinfection by varying the PAC coagulant dosage of
15 mg/L, 20 mg/L, 25 mg/L, 30 mg/L, 35 mg/L, and 40 mg/L. Results of this study
showed that PAC dose of 20 mg/L was the best dose with an organic substance
removal efficiency of 72.84% and color removal efficiency of 98.85%. Highest THM
formation potential from Zhang's equation was 1526.352 μg/L – 1735.952 μg/L,
Ozdemir's was 1477.66 μg/L –1695.298 μg/L, and Stephanie's at 672.768 μg/L –
770.156 μg/L. These values still exceed international quality standards even though
the organic content has fallen below the quality standard. This indicates the
presence aromatic organic fractions, particularly humic acid and fulvic acid
remains the main precursor THM formation.


Keywords: River water, PAC, organic matter, color, trihalomethanes (THM), UVVis
spectrophotometry

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2107110519

Penerbit

Pekanbaru : Universitas Riau – F.TEKNIK – lingkungan., 2025

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2107110519

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

TEKNIK LINGKUNGAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

daus

Versi lain/terkait

Lampiran Berkas

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