Welcome to the forum Watt20!
I think this is the article you were referring to: Equine Compare: Save Money on Heating Bills ? Burn Horse Manure!
Apparently the Manchester Police (England) do it at the station. Police recycle horse dung for cash - Manchester Evening News
BTW, I would think that the high heat from the burning would kill any bacteria that may still be alive after it composts in brickette form.