To permanently delete your account, go to the Privacy Settings tab, located under settings in the drop down and click on the "Disable Account" button.
Please provide a reason for disabling your account. This helps us to improve the site and build a better Portfolium.
Your account may still appear in a Google search until Google reindexes their search. The timing of this is determined by Google. To learn more about Google's removable of outdated content and how to request a removal of outdated content, click here: https://support.google.com/websearch/answer/6349986?hl=en