Details

Autor(en) / Beteiligte

• Striūgas, Nerijus
• Valinčius, Vitas
• Pedišius, Nerijus
• Poškas, Robertas
• Zakarauskas, Kęstutis

Titel

Investigation of sewage sludge treatment using air plasma assisted gasification

Ist Teil von

• Waste management (Elmsford), 2017-06, Vol.64, p.149-160

Ort / Verlag

United States: Elsevier Ltd

Erscheinungsjahr

2017

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• •Thermal air plasma assisted gasification of sewage sludge is examined.•Comparison of the process performance with and without plasma reactor was evaluated.•Plasma processing reduces gas calorific value but increases the yield.•Producer gas further can be utilized for drying of sewage sludge. This study presents an experimental investigation of downdraft gasification process coupled with a secondary thermal plasma reactor in order to perform experimental investigations of sewage sludge gasification, and compare process parameters running the system with and without the secondary thermal plasma reactor. The experimental investigation were performed with non-pelletized mixture of dried sewage sludge and wood pellets. To estimate the process performance, the composition of the producer gas, tars, particle matter, producer gas and char yield were measured at the exit of the gasification and plasma reactor. The research revealed the distribution of selected metals and chlorine in the process products and examined a possible formation of hexachlorobenzene. It determined that the plasma assisted processing of gaseous products changes the composition of the tars and the producer gas, mostly by destruction of hydrocarbon species, such as methane, acetylene, ethane or propane. Plasma processing of the producer gas reduces their calorific value but increases the gas yield and the total produced energy amount. The presented technology demonstrated capability both for applying to reduce the accumulation of the sewage sludge and production of substitute gas for drying of sewage sludge and electrical power.