Physical and chemical characterization of sewage sludge with different proportions of diatomaceous earth 1

[...]the objective of this work was to make a DE vermicompost at different proportions: 0; 7.53; 15.06; 22.59 and 30.12% v/v in relation to a SS pre-compost (PC) and gardening pruning residues. To obtain benefits from the well-known applications of sewage sludge in agriculture, the intention was to mix these two residues in order to form a good quality substrate and at the same time to contribute to the reuse of these two residues. [...]the objective of this work was to evaluate the physical quality of vermicompost obtained from the mixture of sewage sludge, garden pruning residues and different proportions of diatomaceous earth. According to Dores-Silva et al., (2011), the degree of humification and the chemical nature of the substrates directly influence the speed and intensity of the transformations in the organic matter fraction. [...]it was evident that the earthworms had great affinity and fed strongly on DE oil, which accelerated the decomposition and provided the use of some of this carbon in the constitution of its biomass.