A prototype of a pig waste treatment system for a 240-270 pig operation was investigated for its potential of odour control, byproduct utilization and treated wastewater reuse. The high solid portion of the pig waste ranging from 4-8% TS could be treated and stabilized by the anaerobic process with an HRT of 32 days. The diluted liquid portion from raw and anaerobically digested swine wastewater could be effectively treated by the aeration and sedimentation units with an HRT of 3 and 4 days, respectively. Overall removal efficiencies of 89.0-95.4% for TCOD, 82.3-88.5% for TKN and 81.2% for T-P could be achieved. The treated effluent could be reused for irrigation of pastures without any odour problems. It meets the requirements of the wastewater reuse criteria, R-3, issued by the State of Hawaii, Department of Health. The economic analysis was conducted by calculating the NPW (Net Present Worth). The capital cost is the major cost for the proposed treatment system. The reuse of biogas as energy and sludge as fertilizer is the key factor as to whether or not it will turn the treatment system into a profit. An operation of >830 pigs is required to achieve the break-even point for the application of the waste treatment system. Profit could be made with the application of this treatment system by centralising the pig operation if the comprehensive utilization of methane gas and stabilized sludge could be proposed.