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Phosphorus removal from wastewater with Liquiline Control

Safely comply with limit values, optimize phosphate precipitation, and reduce sludge volumes

Many wastewater treatment plants use chemical phosphate precipitation to remove phosphorus from wastewater. However, phosphate loads can fluctuate, making optimal precipitant dosing difficult. If the dosage is too low, the strict phosphorus limits will not be met. In contrast, overdosing means a higher volume of sludge and thus higher disposal costs - in addition to wasting the costly precipitant. Furthermore, the salinity in the biology increases, leading to corrosion in the plant.

  • Save up to 30% of phosphate precipitant

    Optimize phosphate precipitant dosage and unlock a significant potential for savings! The dosage is at an optimum level if your plant reliably adheres to the limit value but does not use more precipitant than required. How do you optimize phosphate precipitation? By using the Liquiline Control system. It doses the precipitant automatically in accordance with the actual load and your individual phosphorus limit value. The result is reliable and resource-saving phosphorus removal from wastewater.

Pumps for phosphate precipitant dosage ©Endress+Hauser

Our Liquiline Control solution for automated phosphorus removal from wastewater controls your precipitant dosing pumps in accordance with the actual load and your individual phosphorus limit value.

Low orthosphosphate concentration after wastewater treatment attenuates eutrophication ©Endress+Hauser

The automation of the phosphate removal ensures a low phosphorus concentration in your wastewater treatment plant's effluent during both peak- and low-load phases.

Tank in a wastewater treatment plant for chemicals based on iron and / or aluminum ©Endress+Hauser

Liquiline Control works with iron-based, aluminum-based and mixed precipitants. You can change the precipitant at any time, e.g. if you want to use a different chemical in summer than in winter.

Phosphorus removal with chemical phosphate precipitation ©Endress+Hauser

Precipitant continues to be added until the target value you have configured for phosphate is reached and the limit value for phosphorus is reliably adhered to.

Liquiline Control's touchscreen display ©Endress+Hauser

Phosphorus removal with Liquiline Control prevents overdosing of precipitant, thereby averting an increase in the salinity of the biology leading to corrosion and an increase in sludge volumes.

The p removal solution can be operated with a tablet or smartphone ©Endress+Hauser

The control system can be accessed with a tablet or smartphone via a secure VPN connection, allowing you to manage the measured values and parameters regardless of location and weather conditions.

Operation of the chemicals dosage from the process control room ©Endress+Hauser

Operate the phosphate precipitant dosing solution from your process control center and/or ...

Operation of the phosphorus removal solution via touchscreen display ©Endress+Hauser

... via an on-site display. You can use your own monitor or we can supply you with a touchscreen display.

The Liquiline System CA80PH orthophosphate analyzer ©Endress+Hauser

The orthophosphate analyzer, Liquiline System CA80PH, provides reliable and reproducible measured values that Liquiline Control uses to regulate the dosing of the precipitant into the clarifiers.

Process map of phosphorus removal in wastewater treatment plants ©Endress+Hauser

Process overview of phosphorus removal and nitrogen elimination from wastewater

How we can help

Liquiline Control is an automation solution that uses continuous flow rate and phosphate measurement to control your precipitant dosing pumps. It can quickly adjust precipitant dosing in the case of changing phosphorus loads or flow rates. This ensures efficient removal of phosphorus from wastewater, which means you use less phosphate precipitant and therefore reduce costs. In addition, optimized precipitant dosing prevents salting of the biology and high volumes of sludge.

  • Full compliance with your prescribed discharge values for phosphorus - even with dynamic influents and high load peaks

  • Optimized phosphate precipitant consumption based on the actual load

  • Control of three dosing pumps at the same time

  • You can use iron-based, aluminum-based as well as mixed phosphate precipitants for your chemical phosphorus removal

  • The process is completely under your control, as you can switch to manual operation at any time

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  • What we offer

    Liquiline Control is a PLC-based automation solution that ensures reliable phosphorus removal from wastewater, stable processes even during peak loads, and cost savings through optimized use of precipitants. It is designed as a modular, expandable...

  • Hardware & Software

    • Based on a Programmable Logic Controller (PLC)

    • Available for installation in existing cabinets or as a separate turnkey cabinet

    • Easy integration into existing process control systems (PCS) via digital fieldbus communication or use as a stand-alone...

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    • Consulting

    • Project management

    • Factory acceptance test (FAT)

    • Site acceptance test (SAT)

    • Certification (CE)

    • Commissioning by experienced Endress+Hauser service engineers

    • On-site trainings

    • Remote maintenance

    • Optimization during operation

    • Worldwide...

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