Depending on other chemistry and regulatory items you can, as pointed out, raise the pH and aerate, you can also use a semipermeable membrane to extract the high pH ammonia into an acid stream on the other side of the membrane. That may prove inefficient depending on many factors. You can lower the pH (sulfuric acid) and then operate an RO to reject the ammonium sulfate. Anything passed may be treated with a conventional softener for final polishing. Much of this experience comes from treating phosphate wastes which have much higher ammonia concnetrations.
This is an extremely small water stream so the membrane system would not be expensive overall. The treatment process depends on the source, balance of water chemistry, and final disposition of the product water.