Hygienization assessment during heap co-composting of Turkey manure and olive mill pomace

This study aimed to investigate the co-composting time effectiveness as well effect of initial Carbon/Nitrogen ratio (C/N)i variation on hygienization olive pomace and turkey manure. Six different heaps, at 3 levels ratios: 20, 22 28, were installed monitored during 6 months assessed three steps: At beginning, end thermophilic-phase curing-phase. The microbial monitoring concerned 5 pathogens contents, used hygiene indicators, namely: Sulphite-Reducing Anaerobes (SRA), Escherichia Coli (E. Coli), Total Aerobic Mesophilic Flora (TAMF), Staphylococci, Salmonella spp. Initially, mixtures showed high TAMF Staphylococci loads. Meanwhile, SRA E. coli populations relatively low was not detected. assessment a significant composting reduction load, except for where its population has increased significantly, while had non-significant pathogen content end-product. final values expressed colony-forming unit per gram (CFU g-1), follow: Sulfite-reducing (≤3.1 x 103 CFU germ an indicator faecal contamination (<4 101 aerobic mesophilic flora (≤1.4 106 (<10 g-1) non-detection Finally, seed germination tests carried out seeds: lentils (Lens culinaris), barley (Hordeum vulgare) durum wheat (Triticum turgidum) that use compost extract is favourable with index (GI%) exceeding 85%. These results confirm non-phytotoxicity maturity composts.