| 摘要 |
An apparatus for pathogen reduction in anaerobic digestate comprises an anaerobic digester 1 which produces biogas 2, a boiler or combined heat and power (CHP) plant 3 which combusts the biogas produced by the anaerobic digester and a sanitization vessel 9 which receives solid state digestate 10 from the anaerobic digester. The combustion of the biogas produces hot water and hot gases which are used to heat treat the digestate in the sanitization vessel. Valves 8 control the input of heated gas in accordance with a computer controlled protocol, whilst valves 24 control the input of heated water to pipes within the walls and floor 19 of the sanitization vessel. A computerised control system 23 receives information from a plurality of sensors, e.g. gas sensors and temperature sensors, and utilises this information to control pumps, blowers, valves and compressors which are required to operate the sanitization vessel. A method of reducing the pathogen content of a solid state anaerobic digestate is also claimed. |
