Open AccessStudy of changes in properties of urban waste water sediments at natural drying sites
Author(s) -
E. L. Verigina
Publication year - 2014
Publication title -
izvestiâ mgtu "mami"
Language(s) - English
Resource type - Journals
eISSN - 2949-1428
pISSN - 2074-0530
DOI - 10.17816/2074-0530-67598
Subject(s) - dewatering , filtration (mathematics) , sediment , environmental science , compaction , wastewater , natural (archaeology) , waste management , flocculation , environmental engineering , geology , geotechnical engineering , paleontology , statistics , mathematics , engineering
Venues of natural drying are the most common constructions of waste water sludge treatment in Russia. The process of dewatering on sludge banks includes 3 steps of removing water from the sediment: gravitational compaction, filtration and drying. The changes in the physicochemical properties of the digested sludge of urban wastewater are studied during the process of natural drying and freezing in the sludge banks. It was found out that the best water returning properties has sediment, frozen at a small negative temperature, characterized by low velocities of the ice front.