Guildal, T.

Mikkelsen, Peter Steen

Sharma, Anitha Kumari

Thomsen, H. A. R.

Many modelling studies have demonstrated that the hydraulic capacity of the WWTP can be improved by introducing various real time control options, however few studies have demonstrated how effective these controls are in the real world

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Downloaded from orbit.dtu.dk on: Dec 19, 2017How far can various control options take us in terms of increased hydraulic capacityunder wet weather conditions?Sharma, Anitha Kumari; Guildal, T.; Thomsen, H. A. R.; Mikkelsen, Peter SteenPublication date:2013Document VersionPublisher's PDF, also known as Version of recordLink back to DTU OrbitCitation (APA):Sharma, A. K., Guildal, T., Thomsen, H. A. R., & Mikkelsen, P. S. (2013). How far can various control optionstake us in terms of increased hydraulic capacity under wet weather conditions?. Poster session presented at86th Annual Water Environment Federation Technical Exhibition and Conference (WEFTEC 2013), Chicago,United States. Conclusions Many modelling studies have demonstrated that the hydraulic capacity of  the WWTP can be improved by introducing various real time control options, however few studies have demonstrated how effective these controls are  in the real world.  Based on 7 years full scale operation data this study investigates the performance of implemented controls strategies on hydraulic capacity and pollution treatment during wet weather conditions  Introduction  ATS operation in combination with other RTC strategies  increases the hydraulic capacity with up to 150% and 67% of the design capacity during winter and summer, respectively reduces the effluent concentrations compared to the conventional wet weather operation by  • 50-60% for chemical oxygen demand (COD)  • 30-60% for Suspended solids • 40-50% for total phosphorous (TP) • No change in total nitrogen (TN) removal efficiency   reduces the  electricity consumption by 7-12 %.   However, in very few cases the ATS operation in combination with RTC was  unable to avoid overflows below the design capacity.  How far can various control options take us in terms of increased hydraulic capacity under wet weather conditions?  Sharma A.K.1*, Guildal T.2, Thomsen H.A.R.3 and Mikkelsen P.S.1 1Department of Environmental Engineering (DTU Environment), Technical University of Denmark, Miljoevej, Building 113, 2800 Kgs. Lyngby, Denmark;  2Avedoere Wastewater Services, Kanalholmen 28, 2680 Hvidovre, Denmark;  3 Krüger - Veolia Water Solutions and Technologies, Gladsaxevej 363, 2860 Søborg, Denmark E-mail: akush@env.dtu.dk   Implemented Wet Weather Control Strategies  Future Improvements Location:  Avedøre WWTP,  Denmark Design Capacity:  345 000 PEB60 Industrial and  residential area Separate sewer Data:  7 years full scale operational data Sharma A.K., Guildal, T., Thomsen, H.A.R.,  Mikkelsen, P.S., and Jacobsen, B.N. (2013). Aeration tank settling and real time control as a tool to improve the hydraulic capacity and treatment efficiency during wet weather: Results from 7 years full scale operational data. Water Science and Technology, 67 (10), Pages 2169-2176 WEFTEC  2013, Session 417: Wet Weather Operation and Control of Integrated Sewer and Wastewater Treatment Plant Systems, 8th October, 2013, 13:30 – 17:00, Room S406b.  Aeration Tank Settling: Introducing settling phase in aeration tanks  during wet weather (patented method).   Sludge Age Control: Dynamic control of mixed liquor suspended solids  in aeration tanks based on  temperature, NH4-N and NO3-N concentrations. Switch to wet weather mode based on flow predictions: Flow data from  a pumping station with approximately 1 hour flow prediction time were used Return Sludge and inlet flow Control based on sludge blanket level: Controlling the return sludge flow and inlet flow based on sludge blanket level  and suspended solids in return sludge. Flow equalization tank: Storm water storage tank at the WWTP is used  as flow equalization tank  Platform used for implementation: STAR control TM Conventional Dry Weather Conventional Wet Weather ATS Wet Weather  Further Information Flow predictions based on radar can be used to start the ATS operation and  has recently been implemented at some WWTPs. Practical experience in future would show whether the usage of these models would reduce the predicted  overflow frequency due to climate changes             Results - Overflows  Results – Treatment Efficiency  Results – Electricity and Chemicals   Summer   Winter   Summer   Winter   Summer   Winter Storm and Wastewater Informatics Project, SWI, is co-financed by the Danish Council for Strategic Research. Anitha Kumari Sharma 

How far can various control options take us in terms of increased hydraulic capacity under wet weather conditions?

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How far can various control options take us in terms of increased hydraulic capacity under wet weather conditions?

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