Effect Of Fermentation Time And Addition Of Rabbit Urine In The Manufacturing Of Liquid Organic Fertilizer Tofu Waste On The Content Of N, P, K
Budi Hastuti (a*) and Fabiola Caroline Novenza Hapsariningtyas (a)

a) Study Program of Chemistry Education , Faculty of Teacher Training and Education, Sebelas Maret University, Jl. Ir. Sutami 36A, 57126 Surakarta, Central Java Indonesia
*bhastuti.uns[at]gmail.com

Abstract

The process of fermenting liquid organic fertilizer tofu liquid waste and rabbit urine has been successfully carried out. The method is to dilute the EM4 bacteria, add 50 ml of distilled water and 5 grams of sugar, then let it sit for 5 days in an airtight state. Liquid organic fertilizer from tofu liquid waste and rabbit urine was fermented with variations in fermentation time of 7, 14, 21 days and variations in addition of rabbit urine 20, 40, 60 ml. Nitrogen content test using the Kjedahl method with three stages, namely destruction, distillation, and titration. The results showed that the optimum level of nitrogen was obtained at 21 days of fermentation with a level of 3.11%, phosphorus levels obtained the best fermentation time of 14 days with a level of 3.05%, and the best potassium level was 3.16% in a 21 day fermentation period and the results of the analysis of liquid organic fertilizers that meet the SNI parameters of the Regulation of the Minister of Agriculture number 70/Permentan/SR.140/10/2011 Nitrogen and Potassium for 21 days of fermentation and for phosphorus yields of 14 days of fermentation. The levels of N, P, K of liquid organic fertilizer increased with the addition of 20, 40, 60 ml rabbit urine with levels of 3.21%, 3, 17%, and 3.32%, respectively. SNI Regulation of the Minister of Agriculture number 70/Permentan/SR.140/10/2011.

Keywords: Tofu liquid waste- Rabbit urine- Fermentation time- Addition of rabbit urine

Topic: Biochemistry