If you lowered the bridge, that would mean that if one or more of the frets are a little bit higher that might be sufficient to interfere with the free vibration of the string, hence a bizz. Elementary geography.

That means you either have to lower the frets in question a fraction, or raise the bridge a little on the side of the fretboard which has the buzzing string. You don't say if the buzz happens just on some frets, or all the way up. If it's just the odd fret lowering it slightly (filing it down maybe) might be the way to go. If you fret it up near the hole end, and work down that should make that clearer.

Otherwise raising the bridge on that side is the answer - lots of guitars are adjustable that way anyway. Otherwise you could stick something under the string where it goes over the saddle - a bit of tough plastic, say from a cheap ball point pen ink-reservoir, might do the job.

The other thing to check, if it's a wound string, is of course to make sure that the string winding hasn't got broken, because that can cause a buzz. A bit the way that knocking sound in a car can turn out to be something rolling around in the boot of the car (or the trunk, if you are American), and you feel a bit of a lemon when the bloke at the garage points that out.(Assuming he's not some cowboy who doesn't tell you and who charges you an arm and a leg for fixing it.)