The Animal By-Products (Wales) Regulations 2006

PART II Treatment systems and parameters for catering waste

1.  Unless an approval specifically permits a different system, catering waste must be treated by one of the systems specified in the table below. The system must ensure that the material is treated to the following parameters:

Composting

System	Composting in a closed reactor	Composting in a closed reactor	Composting in housed windrows
Maximum particle size	40cm	6cm	40cm
Minimum temperature	60°C	70°C	60°C
Minimum time spent at the minimum temperature	2 days	1 hour	8 days (during which the windrow must be turned at least 3 times at no less than 2 days intervals)

The time temperature requirements must be achieved as part of the composting process.

Biogas

System	Biogas in a closed reactor	Biogas in a closed reactor
Maximum particle size	5cm	6cm
Minimum temperature	57°C	70°C
Minimum time spent at the minimum temperature	5 hours	1 hour

2.  The approval must normally specify one of the methods in the table, but the National Assembly may approve a different system if it is satisfied that it achieves the same reduction in pathogens as those methods (including any additional conditions imposed on those methods) in which case the approval must fully describe the whole system.

Composting plants

3.  If the approval for a composting plant specifies one of the methods in the table, it must specify which one and, in addition, must have as a condition either that–

(a) measures must be taken at source to ensure that meat was not included in the catering waste and that following treatment the material is stored for at least 18 days (storage need not be in an enclosed system), or

(b) following the first treatment, the material must be treated again using one of the methods in the table and specified in the approval (not necessarily the same method as was used for the first treatment) except that, if the treatment is in a windrow, the second treatment need not be in a housed windrow.

Biogas plants

4.  The approval for a biogas plant must specify one of the methods in the table and in addition require that either–

(a) measures were taken at source to ensure that meat was not included in the catering waste; or

(b) following treatment the material is stored for an average of 18 days.