PEMANFAATAN LIMBAH CAIR SINGKONG DAN INDUSTRI TEMPE KEDELAI SEBAGAI ALTERNATIF PUPUK ORGANIK CAIR
Cassava and soybean industry has a high level of waste production, and yet have the technology to reduce pollution. Industrial liquid waste is discharged directly into water bodies without any processing will occur blooming (deposition of organic material at disposal), the process of decay and growth of pathogenic microorganisms. These conditions cause the stench and disease organisms. So. The problem can be be solved by the cassava and soybean liquid waste be valuable end products a manner to manage it as an organic liquid fertilizer. This research aims to determine the influence of the environment (pH and temperature), BOD and nutrient content of C and N of the effect of industry concentration EM4 with tapioca waste and industrial waste tempe on the quality of liquid fertilizer. Liquid organic fertilizer conducted 4 weeks with different concentrations of each sample (K1, K2, K3, K4, K5, K6). Fertilizer conducted facultative anaerobes which provides a 10-liter bucket, the lid is provided with a hole size of 2 mm by 1 piece, and once a week conducted physical observations of fertilizer that is pH and temperature. week 4 BOD test, and test the nutrient content of Organic C and N Total. The results showed pH measurement 3rd week suffered the smallest pH of 4.1. Measurement of the temperature reached the peak temperature also on the 3rd week of 37oC. The BOD contained in the sample K4 at 4.6 mg / l and BOD lowest in K6 sample is 3.1 mg / l. Research shows Organic C content ranged from 4.32% to 4.92%, while the content of N-total ranged from 0.88% to 1.87%. From the research of the most good nutrient used as organic manure is sampled K6 (200 ml EM4 + 300 ml + 2500 ml Cassava Waste waste tempe).