Modeling and Simulation of Precipitation Process of Various Salt Components during Sea Salt Production

Abstract:

Salt is commonly produced from seawater by conventional solar evaporation process in Indonesia. Some of the salt produced has not been able to meet the standard requirement especially for industrial uses and make Indonesia still importing salt. This study aims to develop a precipitation model of various salt components during seasalt production from seawater by varying the brine input and output concentration on the crystallization table using the concept of solubility. The evaporation and precipitation processes during the salt production were modeled using a series of separator and filter units and carried out by making use of the electrolyte wizard in Aspen Plus^®. In this simulation, 9 variation were carried out by varying the brine input at concentration 20 ºBe, 23 ºBe, and 25 ºBe and output at concentration 29 ºBe, 30 ºBe, and 31 ºBe on the crystallization table. It is shown that the purity of NaCl salt is significantly influenced by the the brine input concentration to and the brine output concentration from the crystallization table. The percentage of calcium impurity increases when the brine input concentration to the crystallization table is lower while the percentage of magnesium impurity increases when the brine output concentration from the crystallization table is higher. The percentage of sulfate impurity increases when both the brine input concentration to and the brine output concentration from the crystallization table is lower. In practice, it is advisable that the crystallization in the salt table is carried out from 25 to 29 ºBe to limit the amount of magnesium impurity that can cause salt to taste bitter. Conducting the crystallization in this concentration range would give the purity of NaCl salt of 94.049%, which is in accordance with SNI standard for consumption salt, and the yield of NaCl salt of 78.83%. Further study needs to be done to provide a workable solution on how to make the purity of NaCl salt higher such as by using suitable precipitating agents in the salt production to help the precipitation process of various salt impurities.

• Periodical: Applied Mechanics and Materials (Volume 914)
• Pages: 141-150
• DOI: https://doi.org/10.4028/p-qlkuo6
• Online since: May 2023
• Authors: Herry Santoso*, Cynthia Harris, Judy Retti Witono, Kevin Cleary Wanta
• Keywords: Modeling, NaCl Purity, Precipitation, Seasalt Production, Simulation, Solubility

References

[1] Kementerian Kelautan dan Perikanan, "Laporan Tahunan Kementerian Kelautan dan Perikanan," Jakarta, 2019. [Online]. Available: https://kkp.go.id/wp-content/uploads/2017/07/LAPTA KKP 2016.pdf.

DOI: 10.29244/core.6.1.011-017

[2] PT Garam, "Mengelola Tantangan Melalui Pengembangan Berkesinambungan," 2019.

[3] Badan Standardisasi Nasional, "Garam Konsumsi Beryodium," SNI 3556: 2010, 2010. journal.trunojoyo.ac.id (accessed Sep. 17, 2020).

[4] Badan Standarisasi Nasional, "Garam bahan baku untuk garam konsumsi beriodium," SNI 4435:2017, 2017. www.bsn.go.id (accessed Sep. 17, 2020).

[5] Menteri Perindustrian Republik Indonesia, Perubahan Atas Peraturan Menteri Perindustrian Nomor 134/M-IND/PER/10/2009 Tentang Peta Panduan (Road Map) Pengembangan Klaster Industri Garam. Indonesia, 2014.

DOI: 10.25157/dak.v9i2.7865

[6] D. Adi, Tukul Rameyo, Buku Panduan Pengembangan Usaha Terpadu Garam dan Artemia. Jakarta: Pusat Riset Wilayah Laut dan Sumberdaya Nonhayati Badan Riset Kelautan dan Perikanan Departemen Kelautan dan Perikanan, 2006.

DOI: 10.29244/agro-maritim.040404

[7] M. Collares-Pereira, J. ̃o F. Mendes, and P. Horta, "Advanced Solar Dryer for Salt Recovery From Brine Effluent of Desalination Med Plant," 2003.

DOI: 10.1016/j.desal.2006.03.596

[8] Y. Gong, D. J. W. Grant, and H. G. Brittain, "Principles of Solubility," in [Biotechnology: Pharmaceutical Aspects] Solvent Systems and Their Selection in Pharmaceutics and Biopharmaceutics, Vol. VI., New York, NY: Springer, 2007, p.1–27.

DOI: 10.1007/978-0-387-69154-1_1

[9] R. Heyrovska, "Partial Dissociation and Hydration Quantitatively Explain the Properties of Aqueous Electrolyte Solutions and hence Empirical Activity Concepts are Unnecessary," in Nature Precedings, 2011, p.1–21.

DOI: 10.1038/npre.2011.6416.1

[10] J. H. Van't Hoff, "Osmotic pressure and chemical equilibrium," Nobel Lecture, 1901. https://www.nobelprize.org/uploads/2018/06/hoff-lecture.pdf.

[11] K. I. M. Al-Malah, Aspen Plus : Chemical Engineering Applications. New Jersey: John Wiley & Sons, Inc., 2017.

[12] Aspen Tech, Modelling Processes with Electrolytes. Aspen Tech, 1999.

[13] G. Baseggio, "The Composition of Sea Water and Its Concentrates," in Fourth Symposium on Salt, 1974, Vol 1., p.351–358.

[14] Rusiyanto, E. Soesilowati, and Jumaeri, "Penguatan Industri Garam Nasional Melalui Perbaikan Teknologi Budidaya Dan Diversifikasi Produk," Sainteknol J. Sains dan Teknol., vol. 11, no. 2, p.129–142, 2013.

[15] T. A. Adams II, Learn Aspen Plus in 24 Hours. United States of America: McGraw-Hill Education, 2018.

[16] A. E. S. Van Driessche, T. M. Stawski, and M. Kellermeier, "Calcium sulfate precipitation pathways in natural and engineered environments," Chem. Geol., vol. 530, no. July, p.119274, 2019.

DOI: 10.1016/j.chemgeo.2019.119274

[17] M. Apriani, A. Masduqi, and W. Hadi, "Investigation on calcium and magnesium in traditional salt plots: Promoting utilization waste by-product," Int. J. GEOMATE, vol. 15, no. 49, p.130–136, 2018.

DOI: 10.21660/2018.49.06331

[18] R. Aditya, "PEMODELAN DAN SIMULASI PROSES PRESIPITASI ANEKA GARAM PADA PENGUAPAN AIR LAUT DENGAN PENAMBAHAN BAHAN KIMIA PENGENDAP," Universitas Katolik Parahyangan, 2022.

DOI: 10.14710/jksa.14.1.8-11

[19] P. AYOGU, M. Ezugwu, and F. Eze, "Principle of Common-ion Effect and its Application in Chemistry: a Review.," J. Chem. Lett., vol. 1, no. 2, p.77–83, 2020, [Online]. Available: http://www.jchemlett.com/article_113421.html.