| http://www.w3.org/ns/prov#value | - But in principle, technologies such as steam or air stripping are available for nitrogen recovery (Bosshart et al., 1993; Gebel et al., 1994). Since nutrient recycling from sewage sludge and from sludge ash is also assessed within the scope of this study, two recovery processes, namely the Seaborne® process and the BioCon® process, are briefly described. They are s
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