Changes in Selected Fuel Properties of Sewage Sludge as a Result of its Storage

The article presents test results on the changes occurring in sewage sludge during the process of its storage. Tests were conducted on mechanically dehydrated sewage sludge derived from large municipal sewage treatment plants equipped with biological sewage treatment systems. In testing presented in the paper the focus was on the basic fuel properties of sewage sludge: moisture content, heat of combustion, carbon share. In the first part of the article the overview of the issues concerning the sewage sludge management is presented and the genesis of tests is explained. Further in the paper, selected results of conducted tests are discussed. Changes in tested parameters were determined in the period of a 10- month sewage storage.

Authors:

• Michal M. Koziol

Keywords:

• fuel properties
• laboratory tests
• sewage sludge
• storage

References:

[1] Central Statistical Office, Regional and Environmental Surveys
Division, Environment 2009, Warsaw 2009.
[2] Central Statistical Office, Regional and Environmental Surveys
Division, Environment 2010, Warsaw 2010.
[3] Polish Committee for Standadization, PN-80/G-04511. Solid fuels.
Determination of moisture content.
[4] Polish Committee for Standadization, PN-ISO 1928:2002. Solid fuels.
Determination of heat of combustion using oxygen-bomb calorimeter
combustion method and calculation of calorific value.
[5] Polish Committee for Standadization, PN-73/G-04521. Solid fuels.
Determination of carbon and hydrogen content by the Sheffield method.