Q.Does The Blood Need To Be Dried First.
I own a farm and am about to open a butcher shop for butchering my own animals for sale. The waste water would go to a holding tank. Would it be an option to pump this out and spread on my field to add the blood to the field or would I need to pump it out and evaporate it then spread the dry material on the field. It seems like the blood would have the same effect as dried blood and the water it’s in would also contain the nutrients from the well water and other minerals as well.

Certified GKH Gardening Expert
I would be concerned about insect and animal scavengers. Here is some information that may help. You can also call your local extension office for help:
http://compost.css.cornell.edu/naturalrenderingFS.pdf
https://www.gardeningknowhow.com/garden-how-to/info/what-is-extension-service.htm
https://www.gardeningknowhow.com/extension-search