Wordpress Users can now set their Wordpress blogs to empty all items in the Trash Folder as per a set time frame. Trash was a new functionality introduced in Wordpress version 2.9 to avoid any accidental deletion of a post or a comment. Deleted items can be recovered from Trash Folder. If you are absolutely sure, you can empty items in the Trash folder so they are deleted permanently.
Open you wp-config.php file and paste the following line of code:
define('EMPTY_TRASH_DAYS', 5 );
//where 5 is the number of days when to empty trash