Title:
Development of Innovative Thermal Decomposition Technology and its Application for Utilization of Sewage Sludge
Author(s):
Striūgas, N., Pedišius, N., Poškas, R., Valinčius, V.
Document(s):
Paper
Slide presentation
Abstract:
With the expansion of wastewater collection and treatment infrastructure, waste water treatment sludge amount is increasing proportionally. Large quantities of sludge at storage sites are accumulated and the management techniques used to date is becoming a threat to the environment and contrary to principles of sustainable development. Therefore, looking for effective ways to treat sewage sludge is an urgent matter. One of the residual dried sludge disposal technology is gasification. By such technology, the valuable product is produced during thermal decomposition of sludge -flammable gas that can be used for heat and electricity generation. Gasification process is applied not only for reduction of the volume of sludge and extra energy production, but also to reduce environmental pollution. The purpose of this work is to perform experimental investigations in a downdraft gasifier equipped with gas abatement devices -plazmochemical reactor and ESP filter, using dried sewage sludge as a fuel and to determine main process performance and estimate the potential product composition. The experimental analysis revealed the effect of producer gas treatment with high temperature, air plasma jet on the decomposition of hydrocarbons present in gaseous products during the gasification of dried sewage sludge. It was determined that at the optimal plasma operation (air flow 5g/s and the temperature of 1200 C) the presence of hydrocarbons like tars decreased below acceptable level, while the concentration of chlorine (measured in the form of HCl) was approx. to 2 mg/m3.
Keywords:
gasification, sewage sludge, electrostatic precipitator, plasma processing
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Gasification for power, CHP and polygeneration
Event:
23rd European Biomass Conference and Exhibition
Session:
2CO.2.3
Pages:
546 - 549
ISBN:
978-88-89407-516
Paper DOI:
10.5071/23rdEUBCE2015-2CO.2.3
Price:
FREE
