Rationalization of vermicomposting parameters of livestock and food wastes

The purpose of the research is to develop a consortium of Eisenia fetida and Eudrilus eugeniae earthworm species which were used in vermicomposting of food wastes to produce nutrient rich vermicompost. The method includes the study of process parameters affecting vermicomposting such as temperature, ash, pH and moisture variation to analyze the change in properties during vemicompost formation. The macronutrient composition obtained from vermicompost consists of Nitrogen (0.42%), Phosphorous (0.18%) and Potassium (0.37%). The micronutrients such as Zinc, Copper and Iron in vermicompost were estimated. The model equations for various macronutrients based on levels of quantity of cow dung, food waste and earthworms used were developed. The addition of cow dung, food waste and earthworms has positive effect on Nitrogen and Phosphorous nutrient availability in vermicompost as observed from regression models developed. The temperature range of 15-30°C is ideal for growth of earthworm species. Fourier transform infrared spectroscopy analysis of vermicompost was used to analyze the changes in functional groups during vermicomposting process. The valuable organic matter once broken down by earthworms can be mixed with soil to make it rich in nutrients which provides practical value to the vermicompost products produced. © 2019 Widener University School of Civil Engineering. All rights reserved.