World over sewage treatment plants are fighting algae bloom, when this algae can be effectively harvested and processed to obtain valuable oil that can be converted into Bio diesel. The equipment and knowledge required for the implementation of this process is available world over and at nominal costs , which is reducing by the day. The complicated part of this process is the separation of algae from water which currently has been made easy to a large extent.

Sewage treatment is done in different steps and the algae problem comes at around …