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(best examples and good practices) on household organic waste ...

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31<br />

Figure 13.: AD life cycle<br />

(University of Iowa.,2009)<br />

Anaerobic digesti<strong>on</strong> has a limited impact <strong>on</strong> the envir<strong>on</strong>ment, which is related<br />

to the biogas producti<strong>on</strong> itself:<br />

Risk of odors, solved by burning odorous comp<strong>on</strong>ents in the<br />

exhausti<strong>on</strong> air or other odor treatment techniques<br />

Risk of explosi<strong>on</strong>, solved by utilizati<strong>on</strong> of explosi<strong>on</strong>-proof<br />

equipment.<br />

2.2.8. The main aspects of Quality Management of AD Residues<br />

Chemical Polluti<strong>on</strong><br />

The chemical aspects of quality management of digestate are related to the<br />

presence of:<br />

Heavy metals <str<strong>on</strong>g>and</str<strong>on</strong>g> other in<strong>organic</strong> c<strong>on</strong>taminants<br />

Persistent <strong>organic</strong> c<strong>on</strong>taminants<br />

Macro elements (NPK)

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