DOI: https://doi.org/10.14710/jil.22.2.528-542

Estimasi Kualitas Efluen Air Lindi Unit Stabilisasi Berdasarkan Parameter Biokinetika pada Sistem Konfigurasi Kontak Stabilisasi

1Departemen Teknik Sipil dan Lingkungan, Fakultas Teknologi Pertanian, Institut Pertanian Bogor, Indonesia

2Program Studi Teknik Lingkungan, Fakultas Arsitektur Lanskap dan Teknologi Lingkungan, Universitas Trisakti, Indonesia

Received: 7 Feb 2023; Revised: 24 Aug 2023; Accepted: 8 Nov 2023; Available online: 4 Feb 2024; Published: 15 Feb 2024.
Editor(s): Budi Warsito

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Abstract

Pengolahan air lindi dibutuhkan untuk mereduksi kontaminan material organik, anorganik, dan mikroorganisme patogen. Pengolahan air lindi secara biologis melalui unit kontak stabilisasi adalah unit yang sangat efektif dipilih terkait kinerja dan faktor nilai ekonomi untuk menyisihkan kandungan polutan organik air lindi. Akan tetapi, kinerja dan pemodelan proses stabilisasi pada unit ini belum dianalisis secara detail untuk implementasi skala lapangan. Penelitian ini bertujuan untuk mengevaluasi kinerja proses stabilisasi berdasarkan variasi waktu detensi (HRT), mengestimasi nilai parameter biokinetika terbaik, dan memprediksi konsentrasi substrat efluen hasil pemodelan. Penelitian ini dilakukan pada skala laboratorium menggunakan tiga variasi HRT, sebesar 4, 5, dan 6 jam dan disimulasikan di dalam model pertumbuhan mikroorganisme Monod, Contois, Blackman, dan Chen-Hashimoto pada kondisi aliran tidak tunak. Penyisihan kontaminan terbaik pada unit stabilisasi berdasarkan hasil analisis kinerja sebesar 82% nitrit, 42% amonia, dan 38% chemical oxygen demand (COD) diperoleh dari HRT 6 jam. Parameter biokinetika terbaik berdasarkan analisis numerik dan uji validasi untuk nilai Ke, Y, μmax, dan Ks dihasilkan berturutturut sebesar 2,05 hari-1; 32,88 mgMLVSS/mgCOD; 0,57 hari-1; dan 24,38 mg/L dari model Monod. Konsentrasi efluen COD rata-rata dari model Monod diestimasi sebesar 206,28 ± 27,39 mg/L untuk HRT 4 jam; 159,25 ± 72,06 mg/L untuk HRT 5 jam; serta 126,32 ± 38,44 mg/L untuk HRT 6 jam. Nilai parameter biokinetika tersebut dapat diimplementasikan untuk perencanaan unit stabilisasi pada konfigurasi kontak stabilisasi air lindi skala lapangan.

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Keywords: air lindi; biokinetika; kontak stabilisasi; model pertumbuhan mikroorganisme; waktu detensi

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