Effective ways to get rid of smell in basement from drain?
This is precisely why fans exist. One in, one out. You might also sprinkle baking soda (or a freshening product which includes same) on the raw concrete to absorb odor. 

The key is getting things dry, though. Bacteria can't survive long if things are dry. A dehumidifier would help with that. 

If all else fails, rent an ozone neutralizer.