PENGOLAHAN AMMONIUM NITROGEN DARI LIMBAH CAIR INDUSTRI PUPUK UREA DAN BITTERN SEBAGAI PEMBENTUK PUPUK STRUVITE

Authors

  • Raudhatul Ulfa Jurusan Teknik Kimia, Fakultas Teknik, Universitas Malikussaleh
  • Iqbal Kamar Jurusan Teknik Kimia, Fakultas Teknik, Universitas Malikussaleh
  • Faisal Faisal Jurusan Teknik Kimia, Fakultas Teknik, Universitas Malikussaleh
  • Muhammad Nuzan Rizki Jurusan Teknik Mesin, Fakultas Teknik, Universitas Malikussaleh

DOI:

https://doi.org/10.29103/jtku.v12i2.15231

Keywords:

limbah cair pupuk urea, bittern, slow release, struvite

Abstract

Industri pupuk menghasilkan limbah cair yang mengandung kadar amonium (NH4+) yang tinggi sehingga akan sangat berbahaya bila limbah ini dibuang secara langsung ke perairan karena akan langsung merusak ekosistem perairan. Untuk mengurangi dampak negatif tersebut, perlu adanya recoveriy atau pengurangan kadar amonium dalam limbah. Struvite (MgNH4PO4.6H2O) memiliki karakteristik yang slow release, artinya pupuk dapat melepas secara lambat senyawa yang diperlukan tanaman. Limbah garam (bittern) adalah pereaksi yang merupakan sumber Mg2+ pada produksi struvite. Untuk menurunkan biaya produksi sedapat mungkin digunakan limbah sebagai pereaksi untuk menghasilkan produk tersebut. Tujuan penelitian ini ialah untuk menurunkan konsentrasi limbah cair industri pupuk urea dengan pembuatan struvite. Pembentukan kristal struvite  dengan variabel tetap yaitu pH 9 dan variabel bebas yaitu perbandingan reaktan Mg:PO4. Hasil penelitian dari perbandingan molar Mg:NH4+:PO4 1:1:1 penurunan NH4+ maksimum adalah 132.5 mg/L. Penurunan konsentrasi  NH4+ meningkat pada molar reaktan Mg2+ yang lebih besar yaitu pada rasio molar Mg:PO4 1,2:1 mencapai penurunan konsentrasi optimum 75 mg/L. Produk struvite yang dihasilkan juga diperoleh pada molar reaktan pada Mg:PO4 1,2:1 yaitu 11.4 gr. Produk pupuk struvite dianalisa menggunakan XRD.

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Published

2023-11-30

Issue

Vol. 12 No. 2 (2023): Jurnal Teknologi Kimia Unimal - Nopember 2023

Section

Articles

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