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|   | *[[Biogas Appliances|Biogas Appliances]]  |   | *[[Biogas Appliances|Biogas Appliances]]  | 
|   | *[[Parts of a Biogas Plant|Parts of a Biogas Plant]]  |   | *[[Parts of a Biogas Plant|Parts of a Biogas Plant]]  | 
| − | *[[Construction of a Biogas Plant|Construction of a Biogas Plant]]  | + | *[[Substrate Management|Substrate Management]]  | 
| − | *[[Substrate_Management|Substrate Management]]
  | + | *[[Biogas Recovery|Biogas Recovery]]  | 
| − | *[[Biogas_Recovery|Biogas Recovery]]  | + | *[[Digestate Storage and Retreatment|Digestate Storage and Retreatment]]  | 
| − | *[[Digestate_Storage_and_Retreatment|Digestate Storage and Retreatment]]  | + | *[[Digestate Storage and Retreatment|Biogas storage, treatment & use]]  | 
| − | *[[Digestate_Storage_and_Retreatment|Biogas storage, treatment & use]]  | + |  | 
|   |  |   |  | 
|   | === Planning ===  |   | === Planning ===  |