stable and may not require as high a safety factor as conventional nitrification. The modeling was repeated at temperatures from 7.5 to 20 °C. Results showed the InNitri® process allowed for significantly lower design SRT than the conventional nitrification to achieve the same effluent ammonia concentration. Where the design effluent ammonia concentration is 2.0 mg/l, the minimum required design SRT for the InNitri® process is about 60 percent of that required for conventional nitrification. A comparison of the SRT necessary for nitrification using InNitri® versus conventional nitrification showed significant reductions in costs for low temperature wastewaters using the InNitri® process.