OptimEDAR, Optimized Management of Urban Wastewater Treatment Plants

WATER AND ENVIRONMENT

TECHNOLOGY

OptimEDAR,

Optimized Management of Urban

Wastewater Treatment Plants

www.optimedar.eu - www.adasasistemas.com

Index

Background

OptimEDAR Solution

Description of the Wastewater Treatment Process

Traditional Systems of Regulatory Processes

Operation of the OptimEDAR System

Elements of the Solution

Technical Advantages

Case Study

On-Line Monitoring of the Quality of the Effluent

Conclusions

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Background

The increase in contamination and the energy required for treating the water are growing concerns in

countries around the world.

Most WWTP (wastewater treatment plants) must comply with the international guidelines for treating

wastewater and must be updated for carrying out the elimination of nutrients.

The large investment made in the construction of WWTP in many cases has not been followed by a

proper operation. (In general, the WWTP of small towns lack the human, technical and financial

resources required for efficiently managing the plants).

Basic problems encountered by medium and small WWTP

Energy consumption:

A large part of the energy consumption required for treating wastewater is generated by the

aeration of the biological reactor. Often the basic control of the aeration is not prepared to adapt to

the actual amount of contamination.

Production, treatment and elimination of sludge, where its optimisation must be

compatible with the guarantee of maintaining the quality of the effluent.




OptimEDAR solution

Optimizes the operation of the biological reactor of

small and medium WWTP that are not permanently

supervised.

Main objectives:

Reduce the electrical consumption.

Optimize the production of sludge.

Guarantee a better quality of effluent.

Increase the productivity of the entire system.

Expected benefits 25% reduction in expenses related with electrical

power consumption.

Improved quality of effluent water; at least 20% less

nitrogen and phosphate.

15% reduction in the production of sludge.




OptimEDAR Solution

Simple and rugged automatic control system. Ensures there is a balance in the operations of the plant for as long a time as possible.

In a completely automatic manner, it corrects deviations and drives the process to the

desired stability point in as little time as possible.

Easy to install.

Does not interfere with the existing automatic processes. The system overlaps with the control system allowing the operator to operate using the

existing automatic processes and criteria or to easily switch to the OptimEDAR system.

Reliable and easy to operate.




Description of the Wastewater Treatment Process

AMMONIFICATION

Organic nitrogen

Ammoniacal nitrogen

NITRIFICATION

Ammoniacal nitrogen

Nitrite

Nitrate

DENITRIFICATION

Nitrate

System based on the sequence of anaerobic-aerobic-anoxic

control cycles.

Nitrogen gas

WASTE WATER

Organic nitrogen (60%)

Ammoniacal nitrogen (40%)

Sewerage network

Start blowers Stop blowers

Wastewater treatment plant

• Negative Redox potential

• Dissolved oxygen very low

• Oxidation of carbon

• OXIDATION Redox Potential

• Carbon supply with RECIRCULATION

• Oxidation of carbon




Traditional Systems of Regulatory Processes


Time Setpoint Oxygen Setpoint Redox Setpoint OptimEDAR

Elimination of Organic

Matter

Elimination of Ammonium

Elimination of Nitrates

Elimination of

Orthophosphates

Observations

(*) Elimination of

nitrates and

Phosphates if OFF for

a long time.

Does not detect points

of contamination or of

NTK.

Reduction of the

Electrical Power

Consumption.

Slow response times

during high loads.

Generation of

filamentary Organic

materials (in time).

(*) High performance in

the elimination of

phosphates.

x x

x

* *

*



OptimEDAR System Operation

OptimEDAR system philosophy System based on continuous respirometry (Oxygen Probe).

Control of the sequence of anaerobic-aerobic-anoxic control cycles.

Assesses the oxygen needs in the bioreactor in each cycle and decision making.

Intelligent control establishing when each cycle must be executed based on the

contamination of the effluent.

Supplements and corrects

deficiencies in the REDOX system.

Control parameters Dissolved oxygen.

Redox potential.

Controlled variable Oxygenation time of the reactor.




Components of the OptimEDAR System (*)


(*) Use of off-the-shelf components.

Control cabinet

Probes cabinet

Control centre

Dissolved oxygen probe

Redox probe



Components of the OptimEDAR System




Technical Advantages

Reduce operating expenses.

Increase the quality of the wastewater treatment. Stable operation of the biological reactor.

Recovery of the balance in case of important deviations in the inflow or uncontrollable

external conditions.

Improve the operational efficiency. Optimization of the energy consumption.

Degree of stability of the sludge, providing an optimum state for treating water.

Guarantee the quality of the effluent. Complete elimination of organic matter.

Complete elimination of the contents of nitrogen.

High performance in the elimination of orthophosphates.

Elimination of oxygen in the denitrification process.




Case Study: WWTP of Albuera (Spain)

WWTP with a population equivalent to 4,000 PE. Type: Town

Surface area (km2): 26.4

Population: 1,900

Altitude: 253 m

Judicial District: Badajoz

Country: Spain

WWTP Population equivalent 4,000 PE

Total Volume 1,000 m3/day

Average flow 41.67 m3/h



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OXIGENO ECO REDOX

Prior to OptimEDAR

After OptimEDAR

20% energy savings The oxygen demand curve shows a decrease

in the operating time and the number of

operations of the blowers.

The progress of the concentration after installing the OptimEDAR

system was considerably reduced:

3 days after the start of operations, the concentration of nitrates

decreased from 170mg/l to 4mg/l.

Amount of nitrates at the Output






OptimEDAR can be supplemented with the small mobile trailer, which is used for

automatically and continuously monitoring the output of effluent in the WWTP:

Verify the good operation of the WWTP.

View the output of the effluent.

Immediately alert the operator regarding possible problems encountered in the treatment if a

toxic substance enters in the system.

Functionalities of the small trailer:

Can be easily transported and moved.

Easy installation.

Does not affect the existing infrastructure.

Small, reliable and rugged.





Small mobile trailer comprised of:

Analyzer multiparametric aquaTest-MO for

continuously monitoring the basic physical-

chemical parameters and the organic matter:

Temperature 4-40ºC.

pH 0-14 upH (compensated at 25ºC).

Conductivity 0-20 mS/cm.

Dissolved oxygen 0-12 ppm (0-20ppm

optional).

Redox +/- 2500 mV.

Turbidity 0-300 NTU.

Measured organic matter at 254 nm (0 to

400 Abs/m).

Webcam for capturing images.


System of communications and standard

protocols for the acquisition of data.



Conclusions

Improves the quality of the wastewater treatment. Achieves a stable operation of the biological reactor.

Recovers the balance in case of important deviations in the inflow or uncontrollable

external conditions.

Ensures a decrease in operating costs. Optimizes the energy consumption by adapting the operation to the actual load of the

reactor.

Improves the stability and reduces the generation of sludge.

Guarantees the quality of the effluent. Eliminates the carbon demand.

Eliminates the content of nitrogen.

High performance in the elimination of phosphorous.

Reduced installation costs. Solution easily installed.

Quick return on investment.



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OptimEDAR, Optimized Management of Urban Wastewater Treatment Plants

Technology

optimedar system elements

redox system

effluent conclusions

optimedar solution simple

system overlaps

entire system

elimination of sludge

basic control