A process-dependent real-time controller for sequencing batch reactor plants: results of full-scale operation

2006 ◽  
Vol 53 (4-5) ◽  
pp. 143-150 ◽  
Author(s):  
J. Wiese ◽  
J. Simon ◽  
H. Steinmetz
Keyword(s):  
Real Time ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Full Scale ◽  
Treatment Efficiency ◽  
Real Time Control ◽  
Reactor Plant ◽  
Research Project ◽  
Time Control ◽  
N Treatment

This paper presents results of a research project, in which a process-dependent real-time control (RTC) strategy for a sequencing batch reactor plant was realised in full-scale. The cycle controller is based on NH4 analysers, NO3 probes, TSS probes and sludge level probes. With this new RTC strategy it was possible to increase the treatment capacity by 50%. By implementation of the new controller the TN, TP and NH4-N treatment efficiency could be improved significantly, too. The treatment efficiency concerning COD is comparable.

Integrated real-time control for a sequencing batch reactor plant and a combined sewer system

2005 ◽  
Vol 52 (5) ◽  
pp. 179-186 ◽  
Author(s):  
J. Wiese ◽  
J. Simon ◽  
T.G. Schmitt
Keyword(s):  
Real Time ◽  
Sequencing Batch Reactor ◽  
Cost Benefit Analysis ◽  
Batch Reactor ◽  
Cost Benefit ◽  
Full Scale ◽  
Real Time Control ◽  
Time Control ◽  
First Results ◽  
Almost All

Integrated real-time control (RTC) concepts, which are trying to operate drainage systems and WWTPs depending on the current capacities of both systems, are becoming more and more important. While almost all publications in this field have been concentrating on continuous flow systems, this paper will present a project which has been initiated to realise an integrated RTC strategy for a Sequencing Batch Reactor (SBR) plant in simulation as well as in full-scale. The results of the simulation are that SBR plants can handle high hydraulic loads. The cost–benefit analysis shows that an integrated operation is reasonable concerning environmental and economic aspects. In order to verify the simulation results, full-scale operation has been started in January 2004. The first results seem to confirm the results of the simulation study.

Performance evaluation of a full-scale advanced phase isolation ditch process by using real-time control strategies

2014 ◽  
Vol 31 (4) ◽  
pp. 611-618 ◽  
Author(s):  
Hyosoo Kim ◽  
Yejin Kim ◽  
Minsoo Kim ◽  
Wenhua Piao ◽  
Jeasung Gee ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Real Time ◽  
Control Strategies ◽  
Full Scale ◽  
Real Time Control ◽  
Time Control ◽  
Advanced Phase

Real time control for reduced aeration and chemical consumption: a full scale study

2010 ◽  
Vol 61 (9) ◽  
pp. 2169-2175 ◽  
Author(s):  
A. Thornton ◽  
N. Sunner ◽  
M. Haeck
Keyword(s):  
Activated Sludge ◽  
Real Time ◽  
Full Scale ◽  
Real Time Control ◽  
Effluent Quality ◽  
Time Control ◽  
Whole Plant ◽  
Running Cost ◽  
The Uk ◽  
And Control

The use of the activated sludge process (ASP) for the nitrification/denitrification of wastewaters is commonplace throughout the UK and many other parts of the industrial world. Associated with this process are significant costs arising from aeration requirements and for selected sites, the need to provide an external carbon source. These costs can constitute up to of 50% of the total running cost of the whole plant and as such, any effort to reduce them could realise significant benefits. This paper investigates the use of real time control (RTC) using online sensors and control algorithms to optimise the operation of the ASP, leading to greater efficiency and sustainability. Trials were undertaken at full scale to assess the benefit of such a system at a 250,000 population equivalent (PE) works on the south coast of the UK, using Activated sludge model No.1 (ASM 1) as a basis for the control system. Initial results indicate that it is possible to significantly reduce both aeration and chemical consumption costs whilst still delivering the required effluent quality. Over the trial period the aeration requirements were consistently reduced by 20% whereas, a reduction in methanol consumption of in excess of 50% was observed.

Application of pH, DO and OUR Control for Short-Cut Nitrification

2011 ◽  
Vol 347-353 ◽  
pp. 2112-2116
Author(s):  
Wen Bing Chen ◽  
Meng Tian ◽  
Ran Ran Wang ◽  
Feng Liu
Keyword(s):  
Shock Loading ◽  
Sequencing Batch Reactor ◽  
Consumption Rate ◽  
Accumulation Rate ◽  
Batch Reactor ◽  
Nitrite Accumulation ◽  
Real Time Control ◽  
Aeration Time ◽  
Time Control ◽  
Steady Stage

A sequencing batch reactor was employed to treat ammonia wastewater, the pH, DO and OUR were adopted to monitor the start of short-cut nitrification. The results showed that the start of short-cut nitrification was achieved in 31days, ammonia consumption rate was higher than 90% and nitrite accumulation rate was higher than 85%, when pH, DO and OUR were applied to monitor and determine the aeration time, under the condition of temperature was 30°C. With ammonia shock loading conditions, OUR curve couldn’t indicate the end of short-cut nitrification exactly. But real-time control using pH and DO could achieve a stable shortcut nitrification under steady stage and ammonia load shocking stage.

UK Experiences of Full Scale Activated Sludge Real Time Control Systems

2012 ◽  
Vol 2012 (10) ◽  
pp. 5570-5588
Author(s):  
Narinder Sunner ◽  
Michael Haeck ◽  
Andrew Thornton
Keyword(s):  
Activated Sludge ◽  
Control Systems ◽  
Real Time ◽  
Full Scale ◽  
Real Time Control ◽  
Time Control

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

2013 ◽  
Vol 67 (10) ◽  
pp. 2169-2176 ◽  
Author(s):  
A. K. Sharma ◽  
T. Guildal ◽  
H. A. R. Thomsen ◽  
P. S. Mikkelsen ◽  
B. N. Jacobsen
Keyword(s):  
Real Time ◽  
Treatment Plant ◽  
Aeration Tank ◽  
Treatment Efficiency ◽  
Real Time Control ◽  
Design Capacity ◽  
Time Control ◽  
Wet Weather ◽  
Operational Data ◽  
Tank Settling

This paper investigates the aeration tank settling (ATS) operation in combination with real time control (RTC) as a tool for increasing the hydraulic capacity and improving the treatment efficiency of a wastewater treatment plant (WWTP) during wet weather flows. Results from 7 years' full-scale operational data at the Avedøre WWTP, Denmark, show that ATS operation in combination with RTC increases the hydraulic capacity of the treatment plant with up to 150 and 67% of the design capacity during winter and summer respectively. Compared to the conventional wet weather operation, the ATS in combination with RTC operation resulted in lower effluent concentrations for total phosphate (40–50%), suspended solids (30–60%) and chemical oxygen demand (30–50%), whereas no significant effect was observed on total nitrogen. Apart from the reduced effluent concentrations, the RTC resulted in economic savings in the form of reduced costs for electricity and green taxes. However, in very few cases the ATS operation in combination with RTC was not able to handle design capacity, and some overflows occurred at flows below the design capacity. The frequency of these overflows may increase in the future due to increased rain intensity resulting in shorter prediction time available for ATS.

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