This research evaluated the usefulness of real-time control technology in the Treatment of piggery wastewater. Newly invented real-time control technology using Oxidation-Reduction Potential (ORP) was successfully applied to a new type of animal wastewater treatment process with various treatment phases for organic carbon, nitrogen and phosphorus removals. The new unit treatment process composed of two reactors, named tw?-stage sequencing batch reactor. was operated under two different treatment strategies. In the first strategy, the treatment system was operated under real-time control using ORP as a control sensor. However, a conventional fixed-time operation relied on hydraulic retention time (HRT) and solid retention time (SRT) was conducted in the second strategy. None of them used a supplemental carbon source to achieve proper phosphorus removal and denitrification. The usefulness of real-time treatment technology was evaluated by comparing the effluent quality and pollutants removal efficiencies. The average removal efficiencies of TOCs. NH₄,-N. TKN. Ortho-P, total-P, total solids (`IS). total volatile solids (TVS), suspended solids (SS) and volatile suspended solids (VSS) were 98, 100. 98, 97, 98. 78. 90. 97 and 97% in the real-time control and 90. 74. 88. 84. 83, 75, 74, 93 and 92% in the fixed-time operation, respectively. The obtained effluent quality was relatively constant in the real-time control. despite the serious variation of influent strength. However. the effluent quality in the fixed-time operation was variable. depending on the influent characteristics. Particularly. the nitrogen and organic matter levels in die final et)luent were functions of influent quality in the fixed-time operation. Comparisons of the real-time control technology with the fixed-time strategy revealed that the former had significant advantages over the latter as follows : Optimization of treatment capacity was achieved by the application of real-time process control technology. High treatment performance and a constant effluent quality were obtained. despite variations in influent composition. The most distinctive advantage of real-time control technology was its self-adjusting ability to optimize biological pollutant removal and energy consumption by terminating aeration when nutrient removal was complete. With real-time control strategy using ORP, a treatment process for swine manure was effectively operated without the addition of an external carbon source such as methanol or acetate, to enhance denitrification and proper phosphorus removal.