| 摘要 |
<p>An installation for the treatment of organic waste material comprises an anaerobic digester 1 for processing the waste material to produce a combustible fuel gas and a digestate slurry, a separator 4 for separating solids from the digestate slurry and an algal biomass production unit 3 receiving the liquid part of the digestate from the separator to promote growth of algae. The biogas can be used as fuel in an engine, such as a combined heat and power (CHP) unit 2, the engine driving an electricity generator. The engine also produces heat and exhaust gas containing carbon dioxide which can be supplied to the algal biomass production unit to further promote growth of the algae. Preferably, the algal production unit comprises a photobioreactor. Algae produced by the installation may be formed into pellets or briquettes for use as fuel. A method of treatment of organic waste material is also claimed. In another aspect, a method of algal biomass production comprises the burning of the biomass as fuel and subsequently extracting nutrients from the resultant ash. The nutrients are then used to promote growth of further algal biomass.</p> |
