Pyrolysis of sewage sludge: nitrogenated compounds and pretreatment effects

Comparison between emissions from the pyrolysis and combustion of different wastes

“…Sewage sludge from wastewater: sewage sludge A was obtained from a wastewater plant sited in Catalonia (Spain) [13], which had high concentration of metals, especially iron, and cannot be used as fertilizer. Therefore, the most probable use is in an incinerator [6]. Sewage sludge B came from a rural, industrial zone of Alicante (Spain) and had low content of transition metals [17].…”

“…After collecting the exit gas for 5 min, the holder was removed from the furnace. More details regarding the experimental procedure can be found elsewhere [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16].…”

The Property of Lime Sewage Sludge and its Influence on Co-Processing in Cement Kilns

“…Moreover, the decrease in N-H resulted in an increase in the relative ratio of N-O and C-N. Moreover, pyridinic compounds such as the cyano aromatic compounds may have formed in two different ways: from the dehydrogenation of the amino group present in the proteins and from the addition of nitrogen radicals to the light aromatic hydrocarbons [34].…”

“…This is due to the different carbon and nitrogen contents entering the cement kiln, as well as the different nitrogen forms. After adding lime, macromolecule nitrogen-containing compounds resolve into light compounds and NH 3 [34], mainly caused by the decrease in Q-N. In addition, because of nitrogenized reactions, Py-N increased.…”

Production of Activated Char and Producer Gas Sewage Sludge

“…Representative tars for the corresponding benzene ring were selected to benzene (1 ring), naphthalene (2 ring), anthracene (3 ring) and pyrene (4 ring). And the representative tars with nitrogen for the sewage sludge (Fullana et al, 2003) were taken as benzonitrile and benzeneacetonitrile. Gravimetric tar was 26.3 g/Nm 3 .…”