Commission Regulation (EC) No 92/2005 (repealed)Show full title

1. Brookes gasification process means treatment of animal by-products under the following conditions:

(a)

The afterburner chamber is warmed up using natural gas.

(b)

The animal by-products are loaded into the primary chamber of the gasificator and the door is closed. The primary chamber has no burners and is heated instead by the transfer of heat by conduction from the afterburner, which is underneath the primary chamber. The only air admitted to the primary chamber is via three inlet valves mounted on the main door to enhance the efficiency of the process.

(c)

The animal by-products are volatilised into complex hydrocarbons and the resultant gases pass from the primary chamber via a narrow opening at the top of the back wall to the mixing and cracking zones, where they are broken down into their constituent elements. Finally the gases pass into the afterburner chamber where they are burned in the flame of a natural gas fired burner in the presence of excess air.

(d)

Each process unit has two burners and two secondary air fans for back-up in case of burner or fan failure. The secondary chamber is designed to give a minimum residence time of two seconds at a temperature of at least 950 ^oC under all conditions of combustion.

(e)

On leaving the secondary chamber the exhaust gases pass through a barometric damper at the base of the stack, which cools and dilutes them with ambient air, maintaining a constant pressure in the primary and secondary chambers.

(f)

The process is carried out over a 24-hour cycle, which includes loading, processing, cool down and ash removal. At the end of the cycle the residual ash is removed from the primary chamber by a vacuum extraction system into enclosed bags, which are then sealed before being transported off-site for disposal.