Seasonal variations of agrochemical parameters and the nature of free organic compounds in anaerobic sewage sludges were analysed. Some limitations to the land application of these sludges could arise from their high contents in free hydrophobic substances. Most of the identified compounds in ether and toluene extracts (more than 20% of sludge dry weight) were series of fatty acids and their esters. Dialkyl phthalates and alkylbenzenes derived from industrial inputs were also frequent.

8 páginas, 1 figura, 2 tablas. EFCE Publicación Series nº 68. Proceedings del VII Congreso Nacional de Química: Química Agrícola y Alimentaria-2. Sevilla 12-17 de octubre de 1987.

Peer reviewed