Mathovani, Thoriqul Hilmi Afan (2026) Pengaruh Kecepatan Pengadukan Dan Konsentrasi Presipitator Terhadap Sintesis Pupuk Kalsium Nitrat Dari Limbah Cangkang Telur Ayam Dengan Metode Presipitasi. Undergraduate thesis, UPN "Veteran" Jawa Timur.
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Abstract
Eggshell waste is a calcium-rich biomaterial with high potential as a raw material for fertilizer production. This study investigates the effect of stirring speed and pH on the synthesis of calcium nitrate from chicken eggshells using a dissolution–precipitation method. The process involved dissolution in nitric acid (HNO₃) followed by precipitation using ammonium hydroxide (NH₄OH) at varying stirring speeds (200–400 rpm) and pH levels (5–9). The products were analyzed using X-Ray Fluorescence (XRF), SEM-EDX, and yield calculation. XRF analysis showed that the eggshell contained 98.72% calcium. The results indicated that increasing stirring speed improved yield, while pH significantly affected product composition. The optimum condition was obtained at pH 7 and 400 rpm, yielding calcium and nitrogen contents of 29.47% and 16.93%, respectively, which meet the Indonesian National Standard (SNI 02-2806-1992). These findings demonstrate that eggshell waste can be effectively utilized as an alternative raw material for calcium nitrate fertilizer production.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TP Chemical technology > TP155 Chemical engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | Thoriqul Hilmi Mathovani | ||||||||
| Date Deposited: | 29 May 2026 07:20 | ||||||||
| Last Modified: | 29 May 2026 07:20 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/53215 |
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