Evaluation Indexes for Deterioration Condition and Maintenance Management System for Water Purification Plant

Abstract

 We examined and analyzed indicators of aging and maintenance management of water purification plant. We have selected indicators for aging such as the rate of aged water purification plant and aged water purification equipment. We have also included human and financial resources for indicators, such as number of staffs or water supply revenue. The rate of aged water purification plant and water purification equipment become larger, at larger water utilities where the number of staff and revenue on water supply per facility capacity are large. It was also found that utilities with increasing human and financial resources, had decreased the capacity of water purification plant, increased operation rates and water receiving ratios. It was also suggested for utilities of wide-area cooperation and public-private partnership, that the rate of aged water purification plant was improved and financial resources were secured. There may have a difference for the way to secure human resources between wide-area cooperation and public-private partnership.