Skip to Main content Skip to Navigation
Journal articles

Reducing Ammonia Losses by Adding FeCl3 During Composting of Sewage Sludge

Abstract : The release of ammonia nitrogen during composting of sewage sludge mixed with a lignocellulosic bulking agent leads to a reduction in the agronomic value of the final compost and to harmful effects on the environment. We propose adding a cheap salt FeCl3 which can be used without special precaution to reduce ammonia losses by decreasing pH conditions. An in-vessel co-composting experiment was conducted in a large reactor (100 L) in which FeCl3 was added to sludge mixed with a bulking agent (pine shavings and sawdust) and compared with a control mixture without FeCl3. Temperature, oxygen consumption and pH were monitored throughout the composting of both mixtures. The final balance of organic matter, organic and inorganic nitrogen permitted to conclude that the addition of FeCl3 reduced nitrogen loss (by a factor of 2.4 in relation to the control) and increased mineralisation of the organic nitrogen by 1.6.
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-01655846
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Tuesday, December 5, 2017 - 11:20:54 AM
Last modification on : Thursday, December 7, 2017 - 1:14:13 AM

File

Boucher_18360.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

Valérie Boucher, Jean-Claude Revel, Agnès Maritchù Guiresse, Michel Kaemmerer, Jean-René Bailly. Reducing Ammonia Losses by Adding FeCl3 During Composting of Sewage Sludge. Water, Air, and Soil Pollution, Springer Verlag, 1999, 112 (3-4), pp.229-239. ⟨10.1023/A:1005074708873⟩. ⟨hal-01655846⟩

Share

Metrics

Record views

97

Files downloads

127