Application of Online Water Quality Instrument to Energy Saving in WWTP

With economic development and rise of environmental requirement,more wastewater treatment plants need to be built,the discharge standards for wastewater treatment plants are increasingly stringent,and the optimized operation of wastewater treatment plant is especially important.At present,most of wastewater treatment plants will change the operation mode only when the effluent exceeds the discharge standard.As long as the effluent is within the discharge standard,the conservative operation mode is kept.When the hydraulic load of the influent changes,the indexes of the effluent fluctuate.Moreover,when the hydraulic load of the influent is low,it will result in waste.Online water quality instrument in wastewater treatment plant enables to real-timely monitor the hydraulic load of the influent and lays the foundation for optimized control of wastewater treatment process.The practice shows that the optimized operation of wastewater treatment plant by real-timely monitoring the hydraulic load of the influent,using mathematical models and combining modern control theory can improve the treatment efficiency,save energy consumption and reduce the operation cost and carbon emissions.Through quick response to the hydraulic load of the influent,the system stability and the resistance to impact load can be enhanced.