Study on Optimization and Efficiency Improvement of Compound Carbon Source in Wastewater Treatment Plant Denitrification

2021 ◽  
Vol 11 (03) ◽  
pp. 519-527
Author(s):  
继柱 周
Keyword(s):  
Wastewater Treatment ◽  
Carbon Source ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Efficiency Improvement

Model and Sensor Based Optimization of Nitrogen Removal at Klagshamn Wastewater Treatment Plant

1992 ◽  
Vol 26 (5-6) ◽  
pp. 1315-1323 ◽  
Author(s):  
H. Aspegren ◽  
B. Andersson ◽  
U. Nyberg ◽  
J. la C. Jansen
Keyword(s):  
Wastewater Treatment ◽  
Carbon Source ◽  
Activated Sludge ◽  
Nitrogen Removal ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
On Line ◽  
Ammonia Sensors

Optimization of wastewater treatment plants with extensive phosphorus and nitrogen removal is complicated. The Klagshamn wastewater treatment plant in Sweden is operated with pre-precipitation of phosphorus with ferric chloride and denitrification with methanol as carbon source. An activated sludge process, operated with pre-precipitation and denitrification with external carbon source in a compartmentalized plant, requires only small tank volumes but increases the need for proper operation and optimization. On-line nitrogen, ammonia, and TOC sensors are used for a day-to-day control and optimization while mathematical modelling is used for long term strategic planning. The on-line measurements are further used as the basis for the modelling. TOC and ammonia sensors at the influent clearly identify typical and extreme loading variations and nitrate measurements in the activated sludge tanks and the effluent shows the dynamics of the processes. These measurements provide a basis for model calibration. In combination low residuals of nitrogen, phosphorus and organic matter can be achieved.

Secondary clarifiers optimisation in prague's wastewater treatment plant using a mathematical model

2012 ◽  
Vol 7 (1) ◽  
Author(s):  
Jaroslav Pollert ◽  
Ing. Dana Pavlíčková ◽  
Ing. Vladimír Todt
Keyword(s):  
Mathematical Model ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Present State ◽  
Wastewater Treatment Plant ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Activated Sludge Process ◽  
Efficiency Improvement ◽  
New Knowledge

The Prague's wastewater treatment plant includes mechanical and secondary biological treatment with an upgrade of the activated sludge process to partial nitrification and gentrification and gas facility. The plant's capacity (population equivalent) is 1.43 million, the hydraulic is 7.0 m3/s (during rains it is 8.2 m3/s). The main aim is to increase efficiency of sludge removal from the secondary clarifiers after necessary reconstruction. A 3D multiphase mathematical model was used to study possible efficiency improvement while 12 different scenarios (+ the present state) were simulated and compared. Simulation of the clarifiers brings new knowledge of their behaviour. The study has resulted in an optimised design of the secondary clarifiers to be used within reconstruction.

scholarly journals Decentralized proportional-integral control with carbon addition for wastewater treatment plant

2020 ◽  
Vol 9 (6) ◽  
pp. 2278-2285
Author(s):  
M. H. Husin ◽  
M. F. Rahmat ◽  
N. A. Wahab
Keyword(s):  
Wastewater Treatment ◽  
Carbon Source ◽  
Control Strategy ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Operational Cost ◽  
Cost Index ◽  
Effluent Quality ◽  
Aeration Intensity ◽  
The Individual

Two main challenges in activated sludge wastewater treatment plant (WWTP) are cost and effluent quality, which has forced the wastewater treatment operator to find an alternative to improve the existing control strategy. The Benchmark Simulation Model No. 1 (BSM1) is applied as operational settings for this study. In BSM1, the standard control variables are the internal recirculation flow rate and the oxygen transfer rate. To improve the existing control strategy of BSM1, three alternative control handles are proposed, which are the individual aeration intensity control, carbon source addition and combination of both. The effect of each control handles in terms of the effluent violation, effluent quality, aeration cost, and total operational cost index are examined. The simulation result has shown that the individual control of aeration intensity improved the effluent quality index, and reduced the aeration, pumping, and total operational cost index when compared to the standard BSM1 control handle. Nonetheless, the addition of a fixed external carbon source has shown a significantly improved effluent quality with a lower number of total nitrogen violations as compared to the standard BSM1 control handles. Thus, the proposed control handles may be beneficial if applied in a real WWTP.

Analysis and balance of phosphorous removal from wastewater at urban wastewater treatment plant

2020 ◽  
Vol 15 (2) ◽  
pp. 142-151
Author(s):  
Peter Lukac ◽  
Lubos Jurik
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Phosphorus Recovery ◽  
Anaerobic Sludge ◽  
Biological Phosphorus Removal ◽  
The Mean

Abstract:Phosphorus is a major substance that is needed especially for agricultural production or for the industry. At the same time it is an important component of wastewater. At present, the waste management priority is recycling and this requirement is also transferred to wastewater treatment plants. Substances in wastewater can be recovered and utilized. In Europe (in Germany and Austria already legally binding), access to phosphorus-containing sewage treatment is changing. This paper dealt with the issue of phosphorus on the sewage treatment plant in Nitra. There are several industrial areas in Nitra where record major producers in phosphorus production in sewage. The new wastewater treatment plant is built as a mechanicalbiological wastewater treatment plant with simultaneous nitrification and denitrification, sludge regeneration, an anaerobic zone for biological phosphorus removal at the beginning of the process and chemical phosphorus precipitation. The sludge management is anaerobic sludge stabilization with heating and mechanical dewatering of stabilized sludge and gas management. The aim of the work was to document the phosphorus balance in all parts of the wastewater treatment plant - from the inflow of raw water to the outflow of purified water and the production of excess sludge. Balancing quantities in the wastewater treatment plant treatment processes provide information where efficient phosphorus recovery could be possible. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. There are also two outflows - drainage of cleaned water to the recipient - the river Nitra - 9.9 kg Ptot/day and Ptot content in sewage sludge - about 120.3 kg Ptot/day - total 130.2 kg Ptot/day.

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