can i be founded and placed on a iowa child abuse registery and be terminated of my parental rights if i drank a six pack of beer in my own home iowa?

It would appear from your question, that the answer is yes.  Just drinking the 6-pack probably shouldn't lead to termination of rights or have a founded abuse claim.  However, the circumstances around the drinking probably are what led to the founded claim.   Failure to follow DHS requests over the month's long case, seek treatment, and the other issues that are undoubtedly associated with the case, can lead to termination.  If you were recently terminated, you can appeal the termination and seek the appellate court's decision.