Research Article
Nursery Growing Media: Agronomic and Environmental Quality Assessment of Sewage Sludge-Based Compost
Table 2
Physical and physicochemical characteristics of sewage sludge compost.
| Parameters | Value in sewage sludge compost (SSC) | Limit values in SSC (according to Italian Legislation Lgs D. 75/2010) |
| Colour | 10YR 3/2 | | Moisture content (%) | 44.4 | ≤50.0 | Total OM (%)a | 58.6 | — | Oxidizable OC (%)a | 29.0 | ≥20.0 | C : N ratio | 10.2 | ≤25.0 | CHA/CFA | 1.96 | — | Total Kjeldahl Nitrogen TKN (%)a | 2.83 | — | P2O5 (%)a | 0.91 | — | K2O (%)a | 0.71 | — | CEC (cmol(+) kg−1) | 77.0 | — | Pb (%)a | 6.40 | 140 | Cd (%)a | 0.10 | 1.50 | Ni (%)a | 3.20 | 100 | Zn (%)a | 394 | 500 | Cu (%)a | 14.1 | 230 | Hg (%)a | 0.10 | 1.50 | Cr+6 (%)a | 0.10 | 0.50 |
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Values on a dry matter basis; data are mean values, .
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