An experimental investigation of sewage sludge gasification in a fluidized bed reactor.
The gasification of sewage sludge was carried out in a simple atmospheric fluidized bed gasifier. Flow and fuel feed rate were adjusted for experimentally obtaining an air mass : fuel mass ratio (A/F) of 0.2 < A/F < 0.4. Fuel characterization, mass and power balances, produced gas composition, gas phase alkali and ammonia, tar concentration, agglomeration tendencies, and gas efficiencies were assessed. Although accumulation of material inside the reactor was a main problem, this was avoided by removing and adding bed media along gasification. This allowed improving the process heat transfer and, therefore, gasification efficiency. The heating value of the produced gas was 8.4 MJ/Nm, attaining a hot gas efficiency of 70% and a cold gas efficiency of 57%.
IMARENABIO, University of León, Avenida de Portugal 41, 24071 León, Spain.
L F
LF
Calvo
IMARENABIO, University of León, Avenida de Portugal 41, 24071 León, Spain.
A I
AI
García
CESAM, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal ; Department of Applied Chemistry and Physics, University of León, Campus de Vegazana, 24071 León, Spain.
M
M
Otero
D000641:Ammonia / Q000032:analysis; D005740:Gases / Q000737:chemistry; D006358:Hot Temperature; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry
D000641:Ammonia; D005740:Gases; D012722:Sewage; D062065:Wastewater