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All Journal G-Tech : Jurnal Teknologi Terapan Environation (Environmental Engineering Journal of Community Dedication)
Puspitasari, Indah Maharani
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Humanities Computer Science & IT Decision Sciences, Operations Research & Management Energy Engineering Languange, Linguistic, Communication & Media Social Sciences

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The Effectiveness of Sodium Hydroxide Precipitation in Impurity Removal during NaCl Recovery from Bittern Waste Water Puspitasari, Indah Maharani; Putra, Andreansyah Brilliant; Pujiastuti, Caecilia; Panjaitan, Renova
G-Tech: Jurnal Teknologi Terapan Vol 9 No 4 (2025): G-Tech, Vol. 9 No. 4 October 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v9i4.8082

Abstract

Recovery of sodium chloride (NaCl) from bittern, a by-product of salt production, is often hindered by impurities such as Mg²⁺ and Ca²⁺, which reduce NaCl purity. This study evaluated the effect of sodium hydroxide (NaOH) concentration and stirring time on NaCl recovery, using NaOH concentrations of 4.6 until 8.02 N and stirring durations of 20 until 60 minutes at a constant stirring speed of 300 rpm. The process involved NaOH addition, stirring, filtration of precipitates, and NaCl crystallization. Parameters such as impurity levels, pH, NaCl purity, and recovery percentage were analyzed. Results indicated that higher NaOH concentrations and longer stirring times generally decreased impurity levels and improved NaCl recovery. Optimal conditions 5.8 N NaOH and 50 minutes stirring yielded an impurity level of 0.0359%, NaCl purity of 89.61%, and a recovery rate of 85.57%. This study presents a novel approach by optimizing NaOH concentration and stirring time parameters to effectively minimize divalent ion contamination, thereby enhancing NaCl recovery from bittern. The findings have direct applicability in improving the efficiency of salt recovery processes in coastal salt industries, contributing to more sustainable salt production systems.
MAPPING AGRICULTURAL AREAS IN GLAGAH DISTRICT TO DETERMINE THE AMOUNT OF GRAIN PRODUCTION (RICE HUSKS) Saputra, Ananda Dimas Mukti Bayu; Aryogani, Fajar; Utama, Hilmy Ghani; Puspitasari, Indah Maharani; Nadzifah, Novia; Nurmawati, Adika; Saputro, Wiliandi; Saputro, Erwan Adi
Environmental Engineering Journal of Community Dedication Vol. 4 No. 2 (2024): Jurnal Environation
Publisher : Teknik Lingkungan Universitas Pembangunan Nasional "Veteran" Jawa Timur

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Abstract

Area mapping is used to find out the potential that can be explored in an area. Geographically, Glagah District is located in the area of Lamongan Regency which is located in the northern hemisphere, approximately 15 Km from the capital of Lamongan district, located at coordinates between 06° 53' 30.81'' – 7° 23'6'' South Latitude and 112° 17' 01.22'' – 112° 33'12''. Glagah District has an area of 3,888 ha of agricultural land and makes agricultural products in this area quite large. Grain production in Glagah sub-district was 29,104 tons and 18,623.29 tons of rice production in 2019. The large amount of grain obtained makes the potential for processing rice husk waste a thing that needs to be considered. One way to process rice husks is by converting rice husks into burnt charcoal, considering that the silica content in rice husk ash is quite large at 87-97% of dry weight. This method is fairly easy to do and burnt husk charcoal can be used for organic fertilizer that is beneficial for plants.
Co-Authors Aryogani, Fajar Erwan Adi Saputro Nadzifah, Novia Nurmawati, Adika Panjaitan, Renova Pujiastuti, Caecilia Putra, Andreansyah Brilliant Saputra, Ananda Dimas Mukti Bayu Utama, Hilmy Ghani Wiliandi Saputro