出版社：Polish Society of Ecological Engineering (PTIE)
摘要：The aim of the study was to determine the physical and chemical properties of sewage sludge from municipal wastewater treatment plants “Pomorzany” and “Zdroje” located in Szczecin, Poland.The paper presents outcomes of SEM observation of dried and stabilized sewage sludge.The research of the obtained materials was conducted using reference methods, images from a scanning electron microscope were present.The amount of sewage sludge produced with methods of its management were presented.The technology of sludge management is based on dehydrating up to a dry weight content of roughly 20% and then drying in contact dryers up to 90–92% dry weight, separately in both plants.Dried sewage sludge is subsequently burning in a mechanical grid boilers at WWTP “Pomorzany”.The analyzed materials were characterized by pH 7,90-8,42, dry mass and average organic matter content were respectively 18,949% and 68,903%.The elements identified in the largest amount on the surface of analyzed materials was calcium, iron, phosphorus, sulphur and silicon.The amount of phosphorus from 1,82 to 3,44% indicate the possibility of use sewage sludge as organic fertilizer product or alternative source of phosphorus.
