First you need to install the publication extension from typo3 repository, After than install the ns_publication_comment that will enhance the detail view of each publication within comment module. You can configure the comment settings like, enable/disable comment approval, change date/time format, add custom CSS/JS, E-mail configurations, Google recaptcha etc much more.
Step 1. Insert publication comment extension from the plugin element
Step 2. Select the record storage id, Edit date/time formate, captcha setting, user image etc according to your website need from main configurations.
Step 3. You can do the Comment user configurations also.
Step 4. Furthermore, another configurations will be managed from constant editor.