Physical and Chemical Properties of Animals ’ Organic Residues Decomposed by Musca domestica and Calliphora vomitoria Larvae

Abstract

Our study aims to assess physical and chemical properties of organic residues decomposed by fly larvae to be promoted as organic manure. Three stages of four days duration each of biodegradation of 12 various animal substrates (pig, poultry, guinea fowl, sheep, cow, mixture of pig and sheep substrates, mixture of pig and cow substrates, mixture of poultry and sheep substrates, mixture of poultry and cow substrates, mixture of guinea fowl and sheep substrates, mixture of guinea fowl and cow substrates) using Muscadomestica and Calliphoravomitoria larvae were performed. Temperature, pH, weight, organic carbon, total nitrogen, nitrite and ammonia contents during decomposition process were data collected. The highest temperatures were recorded respectively in the pig and poultry substrates. The pH changed from neutral to alkaline. Organic carbon content reduced during the biodegradation process and was positively correlated with reduction of substrate’s weight. Significant decrease of ammonia content was recorded respectively during the first, second and third stages of biodegradation process in the poultry substrate (80, 46 and 61%), guinea fowl (77, 26 and 27%) and pig substrate (76, 66, and 40%). Furthermore, nitrite content was low ranging from 0.0033 to 0.075 gkg-1. The stability and maturity of the final product were high with pig substrates, mixture of poultry and sheep substrates, mixture of poultry and cow substrates, mixture of pig and sheep substrates. It is suggested to Our study aims to assess physical and chemical properties of organic residues decomposed by fly larvae to be promoted as organic manure. Three stages of four days duration each of biodegradation of 12 various animal substrates (pig, poultry, guinea fowl, sheep, cow, mixture of pig and sheep substrates, mixture of pig and cow substrates, mixture of poultry and sheep substrates, mixture of poultry and cow substrates, mixture of guinea fowl and sheep substrates, mixture of guinea fowl and cow substrates) using Muscadomestica and Calliphoravomitoria larvae were performed. Temperature, pH, weight, organic carbon, total nitrogen, nitrite and ammonia contents during decomposition process were data collected. The highest temperatures were recorded respectively in the pig and poultry substrates. The pH changed from neutral to alkaline. Organic carbon content reduced during the biodegradation process and was positively correlated with reduction of substrate’s weight. Significant decrease of ammonia content was recorded respectively during the first, second and third stages of biodegradation process in the poultry substrate (80, 46 and 61%), guinea fowl (77, 26 and 27%) and pig substrate (76, 66, and 40%). Furthermore, nitrite content was low ranging from 0.0033 to 0.075 gkg-1. The stability and maturity of the final product were high with pig substrates, mixture of poultry and sheep substrates, mixture of poultry and cow substrates, mixture of pig and sheep substrates. It is Our study aims to assess physical and chemical properties of organic residues decomposed by fly larvae to be promoted as organic manure. Three stages of four days duration each of biodegradation of 12 various animal substrates (pig, poultry, guinea fowl, sheep, cow, mixture of pig and sheep substrates, mixture of pig and cow substrates, mixture of poultry and sheep substrates, mixture of poultry and cow substrates, mixture of guinea fowl and sheep substrates, mixture of guinea fowl and cow substrates) using Muscadomestica and Calliphoravomitoria larvae were performed. Temperature, pH, weight, organic carbon, total nitrogen, nitrite and ammonia contents during decomposition process were data collected. The highest temperatures were recorded respectively in the pig and poultry substrates. The pH changed from neutral to alkaline. Organic carbon content reduced during the biodegradation process and was positively correlated with reduction of substrate’s weight. Significant decrease of ammonia content was recorded respectively during the first, second and third stages of biodegradation process in the poultry substrate (80, 46 and 61%), guinea fowl (77, 26 and 27%) and pig substrate (76, 66, and 40%). Furthermore, nitrite content was low ranging from 0.0033 to 0.075 gkg-1. The stability and maturity of the final product were high with pig substrates, mixture of poultry and sheep substrates, mixture of poultry and cow substrates, mixture of pig and sheep substrates. It is suggested to give priority to the later substrates for soil fertility management. to give priority to the later substrates for soil fertility management.ive priority to the later substrates for soil fertility management.