The cheapest way to process manure is to just dump it anywhere.  This is what happened and is why we have this situation in the South West Nova river systems.   The temptation would be to continue this practice even if it is not as blatantly obvious as in the picture on the right. However regulators, farmers and you and I have to get involved. This cannot be allowed to happen. 

Composting does not remove phosphates from manure (Fecal & Urine).

Since mink food is fortified with phosphates (phosphoric acid) mink manure contains about 10 times more K that of most other manures. What escapes from the dung pile is Nitrogen (N₂) and Methane (CH₄),  water vapour & aromatic hydrocarbons . The pile can loose as much as 50% of its weignt but still contains relatively the same amount of nutrients as before.  You could cremate it and get rid of all the water and carbon but you would still have most of the nutrients and in a very water soluble state.   You can use it to generate power by collecting the methane but what is left is still manure.

Even if you could make compost suitable for "consumption" it would still  be just as toxic to aquatic systems. If it is buried in the ground it will eventually find it's way into the watershed and rivers.  It is a valuable but dangerous substance and must be handled with respect, for what it can potentially do, for good or bad.  

A well-managed compost pile will reach temperatures high enough to kill fly eggs and larvae in manure. By reducing the amount of uncomposted manure you have, you'll also reduce breeding grounds for flies.  The high temperatures achieved through composting also kill worms and pathogens (organisms such as bacteria, viruses, fungi, and protozoa that are capable of producing an infection or disease). This is especially important if you are spreading your manure in the same fields or on vegetable gardens