Surface temperature analyses of sewage sludge based open air composting

The economical growth of the EU is followed by the growth of the amount of wastes which indicates needless cost, energy consumption, environmental damages, health problems and decreases life quality. The main goal of the EU is to transform the community to a “recycling society” through the decrease of these negative effects.

One of the first steps is the utilization of produced sewage sludge. The sewage sludge is a very good raw material of composting because its advantageous characteristics do not change during the degradation process. To increase the effectiveness of composting sewage sludge has to be mixed with bulking agents – such as wood clipping, straw, etc. Commonly, the used method to follow and control the degradation process is the temperature measurement during retention time. In most cases only the inner temperature is examined and the surface temperature is not taken into consideration. During our research we examined sewage based compost prisms. Two prisms were examined where wood clipping or straw was used as bulking agent. To determine the surface temperature PYROLATER 12 thermocamera was used. Samples were collected from points where the temperature was higher and where the temperature characterized the surface averagely. The samples were taken in the fourth week of the degradation when the temperature is stable. The aim of this paper is to determine the reasons of the different surface temperature and to analyse the differences of surface temperature and temperature distribution of compost prisms that were set with various raw materials.



Copyright: © European Compost Network ECN e.V.
Quelle: Orbit 2014 (Juni 2014)
Seiten: 0
Preis: € 0,00
Autor: Dr. Gergely Hunyadi
Csilla Juhász

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