Aini, Septi Nurul and Niswati, Ainin and Sarno, . and Yusnaini, Sri (2013) Peningkatan P-larut dari Batuan Fosfat dengan Campuran Limbah Cair Tahu dan Asam Sulfat. In: Seminar Nasional Sains & Teknologi V, 19--20 November 2013, Bandar Lampung.

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The main material in phosphate fertilizer industry is phosphate rock. The principle of the superphosphate fertilizer process is changing from tricalcium phosphate into phosphoric monocalsium by acidulation using sulfuric acid. This process requires a high cost, causing fertilizer prices in the market become more expensive. Therefore, an alternative is needed to produce P fertilizer at a low cost by utilizing tofu liquid waste that has a low pH to dissolve rock phosphate. The combination between sulfuric acid and tofu liquid waste is expected increasing for solubility phosphate. This research aimed to explore combination of tofu liquid waste and sulfuric acid as well as the long incubation with the best P solubility of rock phosphate. The research was conducted at the Laboratory of Soil Science and Agro Waste Laboratory Lampung University from August to September 2013. The research was designed with factorial 5x4 in randomized block design with three replications. The first factor is the ratio of tofu liquid waste mixture and sulfuric acid (100%:0%; 95%:5%; 85%:15%; 75%:25%; 0%: 100%) and the second factor is the time of incubation of phosphate rock (1,3,7, and 14 days). The results showed that the highest P-soluble in a combination (0%:100%) with 7 days incubation is 10,80% P2O5. However, the best combination ratio is (85%:15%) with 7 days incubation is 10,48% P2O5 because the combination (85%:15%) is likely to (0%:100%). P solubility using a combination of (0%:100), and (85%:15%) incubation was suitable for a quality P-natural fertilizer for agricultural (SNI 02-3776-2005) on the category A.

Item Type: Conference or Workshop Item (Speech)
Subjects: S Agriculture > S Agriculture (General)
Divisions: Fakultas Pertanian (FP) > Prodi Ilmu Tanah
Depositing User: Prof Dr Ainin Niswati
Date Deposited: 07 Nov 2016 01:17
Last Modified: 07 Nov 2016 01:17

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