Proximate Composition of Sludge from Different Types of Animal Manure

This study aimed to determine the nutritional value of sludge (a by-product of biogas) based on their proximate composition. The sludge was made from animal manure of ruminants, pseudo-ruminants, and non-ruminants. The study was divided into seven treatments: 100% cow dung (T0), 100% broiler manure (T1), 100% rabbit manure (T2), 50% cow dung + 50% broiler manure (T3), 50% cow dung + 50% rabbit manure (T4), 50% broiler manure + 50% rabbit manure (T5), 33.4% cow dung + 33.3% broiler manure + 33.3% rabbit manure (T6). The parameters measured were dry matter (DM), ash content, crude protein (CP), crude fiber (CFi), and crude fat (CFa). The treatments were statistically tested using a one-way analysis of variance in a completely randomized design. As a result, different types of animal manure sources significantly (p < 0.05) affect all parameters (DM, Ash, CP, CFi, and CFa) in sludge. The T4 had the highest DM (93.12%), followed by T6, T0, T5, T1, T2, and T3. The result showed that the ash content of T2 was higher than the other treatments. Interestingly, for both CP and CFa, the highest and lowest values were achieved by T1 and T5, respectively. In contrast, the T1 (11.57%) and T5 (53.55%) treatments act differently for CFa content. Due to its potential nutrient content within the sludge, it may be possible to use it as a new feed resource for local farm businesses.