HE Nan,WANG Rui,PENG Zhu,et al.Optimization of Collaborative Operation of Coagulation-Sedimentation and Microfiltration in Reclaimed Water Treatment Plant[J].China Water & Wastewater,2021,37(7 7):85-91.
Optimization of Collaborative Operation of Coagulation-Sedimentation and Microfiltration in Reclaimed Water Treatment Plant
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
7 7
Page:
85-91
Column:
Date of publication:
2021-04-01
- Keywords:
- reclaimed water treatment plant; coagulation and sedimentation; microfiltration; modeling; operation optimization
- Abstract:
- To solve the problems existing in experience operation of coagulation-sedimentation and microfiltration process in a reclaimed water treatment plant, a pilot system was built to simulate the actual operating conditions, and optimization of the collaborative operation was conducted. Based on the establishment of the sedimentation tank effluent turbidity model, transmembrane pressure growth model of submerged continuous microfiltration system (CMF) and CMF backwashing recovery rate model, the dosage and filtration cycle were used as control variables, and a multi-objective optimization model was established to realize the best operational condition and the lowest operational cost of the system. The optimal operation plan of the reclaimed water treatment plant was determined through the comparative test between the experimental operation and simulation optimization operation of the pilot system, continuous operation test of different filtration cycles (to examine the effect of different filtration cycles on the backwash and membrane fouling) and production test of the reclaimed water treatment plant. On the premise of meeting the treatment requirements, the per cost of the process was reduced by 19.50% through optimizing the coagulant dosage, pre-chlorination and prolonging the filtration cycle (from 30 min to 40 min), and the treatment efficiency of each unit was fully utilized.
Last Update:
2021-04-01