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 reactor 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.