How do I UNCLOG a VIRTUALLY uncloggable drain?

We have a meat plant and recently a blood bucket broke to cause the drainage pipe to clog as blood thickens as it sits. Now, the drainage part of one side of the kill floor isn't working. We've tried the electric eel and LOTS and LOTS of bleach! Since our plant is like in the middle of nowhere, a plumber charges exorbitant sums just to drive up to the facility! Do you guys know if there is some kind of extremely powerful chemical that I can use to clear the drains WITHOUT harming the pipes? Thanks!