Abstract
The usage of chicken manures as organic fertilizers is becoming popular as a result of rapid growth in organic farming. Direct application of chicken manures to soils however poses contamination to the environment. Therefore, chicken manures should be transformed to be environmental friendly and easy handling before it can be applied as organic fertilizers. In this study chicken manure was transformed into organic fertilizer by chemical mineralization technique. It involved the mixing of chicken manures with CaO and Ca(OH)2 subsequently undergone heat treatment. The effect of CaO and Ca(OH)2 on the solubility of nitrogen and phosporus were studied. The nitrogen content was measured using nitrogen analyzer, whereas phosporus solubility was measured using UV/VIS spectrometer. Results showed that mineralization technique was able to produce soluble phosporus and nitrogen from mineralized chicken manures. CaO and Ca(OH)2 contributed significant effect on the solubility of nitrogen and phosporus, where more than 80% of nitrogen from chicken manures can be dissolved.
