Study of changes in properties of urban waste water sediments at natural drying sites

Abstract

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.

Keywords

sites for natural drying / physico-chemical properties / sludge of urban wastewater

References

[1] Технический справочник по обработке воды. Degremont. Т. 2. С-Петербург: «Новый журнал», 2007.

[2] Туровский И.С. Осадки сточных вод. Обезвоживание и обеззараживание. М: «ДеЛи принт», 2008.

[3] Веригина Е.Л., Козлов М.Н., Данилович Д.А. Площадки естественной сушки// Материалы Межд. научн. конф. IWA, 2006, с.65-72.

RIGHTS & PERMISSIONS

Verigina E.L.