Kartika, Sucahyaning Wahyu Trihasti (2022) Recovery Mineral Garam dari Limbah Air Tua Menggunakan Metode Cylindrical Membrane Electrodialysis. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kebutuhan garam yang meningkat dari tahun ke tahun menyebabkan produksi garam semakin tinggi. Peningkatan produksi garam ini berdampak pada peningkatan limbah hasil produksi garam atau limbah air tua yang semakin banyak.
Limbah air tua atau bittern masih memiliki kandungan mineral dan cairan induk pembuatan garam yang dapat dimanfaatkan kembali. Salah satu cara yang dapat digunakan untuk mengambil mineral garam limbah air tua yaitu dengan teknologi recovery. Recovery diharapkan mampu meningkatkan nilai tambah dan laju produksi dari mineral garam yang telah dipulihkan, serta diharapkan mampu meminimalisir polutan dari air limbah ke badan air sebagai hasil samping produksi
garam. Teknologi cylindrical membrane electrodialysis dapat menjadi alternatif dalam recovery bittern karena hemat lahan, ramah lingkungan, dan efektif. Teknologi elektrodialisis menggunakan membran selektif permeabel untuk
memulihkan ion mineral dalam bittern. Penelitian ini bertujuan untuk menentukan kondisi optimum pada penggunaan variasi debit resirkulasi, pengkondisian temperatur proses, dan kuat arus dan konsumsi energi serta biaya yang digunakan. Penelitian dilakukan dengan tiga variabel antara lain: (1) variasi kuat arus 5A, 7.5A, dan 10A; (2) variasi pengkondisian temperatur di feed tank dengan rentang 25oC –
35oC, 36oC – 45oC, dan tanpa pengkondisian; (3) variasi debit resirkulasi 24 L/jam, 30 L/jam, dan 36 L/jam. Parameter yang dianalisis yaitu pH, TDS, Ca2+, Mg2+, Cl-, SO42-, Na+, K+, dan Cl2 bebas.
Hasil yang didapat variasi kuat arus dan debit resirkulasi berpengaruh secara signifikan terhadap model proses penyisihan dan recovery mineral garam pada kondisi optimum. Penggunaan variasi debit resirkulasi 24 L/jam dan kuat arus 10A mampu mencapai rejeksi dan recovery masing-masing parameter ion dalam penelitian sebesar 47,77% dan 37,61%. Sedangkan untuk parameter temperatur tidak berpengaruh secara signifikan dalam model proses recovery ektrodialisis
yang dibuktikan dengan nilai P-value >0,05. Kondisi optimum untuk temperatur operasi berada pada 25-35oC untuk menyisihan dan recovery. Potensi penerapan teknologi elektrodialisis yang digunakan untuk recovery mineral garam sudah tepat dilihat dari segi biaya dan konsumsi energi yang dihasilkan. Biaya yang dihasilkan dari penelitian recovery bittern pada kondisi optimum menggunakan teknologi
elektrodialisis sebesar Rp 2.172,00/5 jam proses.
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The increasing demand for salt from year to year causes the production of salt
to be higher. This increase in salt production has an impact on increasing the amount
of waste produced by salt production or old water waste. Salt water waste or bittern
still contains minerals and the main liquid for making salt that can be reused. One
way that can be used to take mineral salts from old water waste is by recovery
technology. Recovery is expected to increase the added value and production rate of
the recovered mineral salts, and is expected to be able to minimize pollutants from
wastewater to water bodies as a by-product of salt production. Cylindrical membrane
electrodialysis technology can be an alternative in bittern recovery because its
compact, environmentally friendly, and effective.
Electrodialysis technology uses a selective permeable membrane to recover
mineral ions in the bittern. This study aimed to determine the optimum conditions for
the use of variations in recirculation discharge, conditioning process temperature, and
electric current strength and energy consumption as well as the costs used. The
research was conducted with three variables, namely: (1) variations in electric current
strength of 5A, 7.5A, and 10A; (2) variations in temperature conditioning in the feed
tank with a range of 25oC – 35oC, 36oC – 45oC, and without conditioning; (3)
variations of the recirculating discharge 24 L/hour, 30 L/hour, and 36 L/hour.
Parameters analyzed were pH, TDS, Ca2+, Mg2+, Cl-, SO42-, Na+, K+, and free Cl2.
The results obtained that the variations in current strength and recirculation
discharge have a significant effect on the process model for the removal and recovery
of mineral salts at optimum conditions. The used of variations of 24 L/hour
recirculating discharge and 10A electric current was able to achieve rejection and
recovery of each ion parameter in the study of 47.77% and 37.61%. Meanwhile, the
temperature parameter has no significant effect on the electrodialysis recovery
process model as evidenced by the P-value > 0.05. Where the optimum condition for
the operating temperature were at 25-35oC for removal and recovery. The potential
application of electrodialysis technology used for mineral salt recovery is appropriate
in terms of cost and energy consumption. The cost generated in optimum condition
from the bittern recovery research using electrodialysis technology is Rp. 2,172.00/5
process hours.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | bittern, cylindrical membrane reactor, debit resirkulasi, elektrodialisis, kuat arus, bittern, electric current, cylindrical membrane reactor, electrodialysis, recirculation discharge |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering > TD480.5 Electrodialysis |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Environmental Engineering > 25101-(S2) Master Thesis |
| Depositing User: | Sucahyaning Wahyu Trihasti Kartika |
| Date Deposited: | 13 Feb 2022 13:55 |
| Last Modified: | 01 Nov 2022 00:49 |
| URI: | http://repository.its.ac.id/id/eprint/93750 |
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