There doesn't appear to be a really reliable mass-sink for sand or glass. Most of the things which use glass aren't crafting in huge qualities (ie like iron/copper/steel plates are) and I've found myself just storing sand in chests then blowing the chests up when it gets full. Maybe landfill or concrete as a sink for consuming excessive sand?
Disabling the "sand & glass" setting doesn't fully get rid of sand while it does get rid of glass