At present, the Waste Management Licensing Regulations stipulate that aerobically or anaerobically digested biodegradable waste must be source segregated before being spread.
But in a joint consultation between the Department for Environment, Food and Rural Affairs and the Welsh Assembly Government, the requirement was scrutinised to see if it remains appropriate for the control to remain in place.
In all, 40 organisations and individuals responded, with there being general agreement about the need for some sort of waste output standard to be established either to supplement the existing source segregation requirement or to eventually replace it.
Local Environment Minister Ben Bradshaw said: I have given careful consideration to all the points raised during the consultation, and to our wider aims for the waste strategy.
I have concluded that, for now, the source segregation requirement should remain in place as a temporary safeguard against the land spreading of any sub-standard wastes to agricultural land in order to protect the environment and human health.
However, Bradshaw added that he has asked officials to carry out work to find a longer term, more sustainable solution.
The aim of this is to encourage the development of technologies that will produce high standard outputs which can be safely spread on land.
Research will also centre on a further technical assessment on the merits of using the source segregation requirement as an input control on mixed municipal waste.
It will make a further comparison of technologies, systems and regulations used to manage this particular waste recovery activity in other countries.
Bradshaw added: I am extremely keen to find a regulatory solution that will give local authorities greater freedom when it comes to choosing and investing in technologies to deal with mixed municipal waste while, at the same time, ensuring that we continue to meet the requirements of the Waste Framework Directive.