This is a interesting question raised at various webmaster and search engines forums When Google process disavow links request filed by you? The Answer is not yet know as how much time Google takes in processing your disavow File. However in following circumstance we can assess that disavow links files is taken care
- If you filed a request reconsideration with Google along with disavow files for removal of bad links and when you get positive or negative answer from Google you can consider that file has been considered.
- If after uploading disavow files you see changing in your search engine ranking it can be assumed that disavow links files has been taken care by Google
However there is no feature in Google Webmaster Tool which shows that you file is processed. I think in future google will give this feature in WMT