Agnes Serbanescu, Mona Barbu, Ileana Nicolescu, Elena Bucur
Co-combustion
Abstract:
Sewage sludge from urban wastewater treatment plants come from different stages of
wastewater treatment and are considered as waste, falling under the waste regulations.
In order to reduce the negative environmental impacts, the removal of sewage sludge
on landfill is considered as the last waste management option.
One of the sludge management alternatives is to recover energy from the sewage
sludge by incineration in waste incinerators or co-combustion in cement or thermal
power plants.
The use of sewage sludge as a source of renewable energy is an ecologically and
economically efficient option, both in the EU and Romania sludge management
strategy.
Total organic carbon is a key environmental indicator for soil, sludge and sediment
and a parameter for characterizing sludge for energy recovery.
The paper presents the methodology for total organic carbon determination from
acidified sludge samples by dry combustion, in an oxygen atmosphere using FlashEA
1112 Series Analyser.
From the experimental laboratory researches the following aspects were highlighted:
the interdependence between the total organic carbon content and the heating value
of sludge samples, an important factor for energy recovery/elimination by
incineration, co-combustion and utilization as secondary raw materials in cement
plants.