Clean Package Sewage Treatment Plan 50KLD, Moving Bed Biofilm Reactor (MBBR) sewage treatment plant is a simple and reliable method of treating wastewater. Due to simple operations and easy manageability, it is better than the conventional methods. MBBR uses a cluster of polyethylene bio film carriers that move randomly in the aerated basin containing wastewater. Since each carrier offers an effective surface area to cater the autotrophic and heterotrophic bacteria, this system is useful for a high-density population of bacteria. High degrees of reliability and ease of operation are assured by the MBBR system.