This study showed successful removal of ammonia, nitrate, and nitrite in a high intensity shrimp raceway system by a SBR. The removal efficiencies of all nitrogen species were more than 95% and the treated waste water was successfully recycled in the shrimp production system. The operation of SBR is simple and it only needs an addition of molasses as a carbon source because the shrimp waste water was carbon limiting. In order to complete the denitrification process the C:N ratio should be maintained at 10:1. Molasses is an inexpensive carbon source, which makes the system economical. The advantage of us-ing SBR technology is its simplicity. A SBR is a variation of the activated sludge process. This process uses multiple steps in the same reactor and the nitrogen removal was accomplished by the sequential operation of the re-actor aerobically followed by anaerobic process. Microbial analysis showed diversity of microbes present in the shrimp waste water including nitrifiers, denitrifiers, and hetero-trophic bacteria and so the reactor did not need start up period and inoculum addition and acclimation.