A review on migration and transformation of nitrogen during sewage sludge thermochemical treatment: Focusing on pyrolysis, gasification and combustion

Release of N-Containing Compounds During Pyrolysis of Milk/Dairy Processing Sludge – Experimental Results and Comparison of Measurement Techniques

“…The same trend was observed for SS indicating that the pyrolysis of protein did not produce high amounts of HCN [45]. However, in some studies, the reported amount of N released from SSs as HCN was higher As DPS contains mainly proteins that decompose at higher pyrolysis temperatures (above 300 ℃) more NH 3 was formed at higher temperatures, as previously observed for SS [30,35,49].…”

“…Anca-Couce et al [57] and Li et al [30] based on previous research in [35,49,58,59] summarised the major routes for formation of NO x precursors during pyrolysis. NH 3 and HCN are not directly released from primary pyrolysis of proteins.…”

“…A systematic review by Li et al summarises the state of current knowledge on the distribution, migration and transformation mechanisms of nitrogen during pyrolysis of SS [30]. The nitrogen in SS consists mainly of organic bound nitrogen and a smaller amount of inorganic nitrogen such as ammonia nitrogen (NH 4 --N) nitrate nitrogen (NO 3 --N)…”