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Band filter press for dewatering sludge from a municipal wastewater plant

Wastewater sludge treatment

Optimized dewatering, digester, and disposal processes help reduce operating costs and protect the environment

Sludge treatment and disposal into the environment are increasingly regulated worldwide, driving the wastewater industry to explore new solutions, at high costs. To minimize operating costs, sludge preparation and optimizing the dewatering process are essential to reduce its volume for drying or incineration. Anaerobic
digestion of sludge further reduces the volume and weight, and as a by-product, biogas and biomethane can be captured and reused as biofuel and electricity.

How we can help

Endress+Hauser's portfolio helps plant operators to increase cost efficiency by accurately tracking dewatering rates against target and consumption of polymers required for sludge conditioning.

  • Optimized polymer consumption and enhanced dewatering results

  • Improved digester process and condition monitoring

Applications

Sludge conditioner preparation

Polymer solutions for sludge conditioning must be prepared by dilution on-site. Flocculants are costly, and to achieve stable dewatering results and maximize dewatering cycles, achieving the right polymer concentration is essential.

Measurement technology in the sludge preparation process
Tapasztalatunk az adott szakterületen

Our proven portfolio of highly accurate electromagnetic flowmeters enables optimal polymer solution concentration and polymer consumption.

Improve dewatering results for optimal sludge concentration

Because the achieved polymer concentration can vary, an optimal ratio between polymers and suspended solids in the sludge is only sometimes guaranteed. Optimized dewatering results depend upon controlled incoming sludge concentration and density measurement.

Measuring technology for sludge concentration
Tapasztalatunk az adott szakterületen

Our Coriolis mass flowmeters combine flow and media density measurement for the constant and accurate dosing of polymer solutions. Alternatively, combining a precise electromagnetic flowmeter with a suspended solids measurement ensures stable and good dewatered sludge results.

  • Ensure optimum flow and density measurement with very dark sludge by using Proline Promass A500 Coriolis flowmeter

  • Achieve stable sludge dewatering results by combining our highly accurate electromagnetic flowmeter Proline Promag W 400 with the suspended solids sensor Turbimax CUS51D

Foam in the dewatering process

The centrate water from the sludge dewatering process is heavily contaminated with ammonium nitrogen and may only be fed to the wastewater treatment system in dosed quantities. For this purpose, it is buffered in a retention basin. Since the resulting foam of the medium strongly impairs the process, monitoring is indispensable.

Micropilot FMR60 installed in centrate shaft
Tapasztalatunk az adott szakterületen

Our Micropilot FMR60 radar meter continuously measures the level of the centrate water and can detect the foam formation with the help of the integrated Heartbeat Technology. In addition, the optimum dosing quantity of the defoamer and efficient pump control can be ensured.

Efficient digester processes

Beneficial bacteria must be protected from critical conditions in the sludge digestion process.

Digesters in a wastewater treatment plant
Tapasztalatunk az adott szakterületen

Our process instrumentation guarantees an environment where digester bacteria can flourish: maintained darkness, an absence of oxygen, constant temperature and a nearly neutral pH value.

Precise flow and methane measurements in wet biogas

Biogas flow rate and methane concentration are critical parameters indicating process disturbances in anaerobic sludge digestion. However, environmental conditions such as significant flow dynamics, water-saturated biogas, changing methane concentration and extremely low pressure make measuring these parameters difficult for most devices.

Biogas flow rate and methane concentration measurement
Tapasztalatunk az adott szakterületen

Our unique inline Proline Prosonic Flow B 200 ultrasonic flowmeter provides accurate, reliable measurement of wet biogas flow rates and methane concentration under fluctuating process conditions.

Learn more about wastewater sludge treatment

Sludge treatment in the wastewater industry ©Endress+Hauser
Centrifuge for dewatering during the sludge treatment process ©Endress+Hauser
Digester control for sludge management ©Endress+Hauser

Előnyök

Striking a balance between legislative obligations and cost efficiency is one of the main challenges in the wastewater industry today. Our industry consultants worldwide are familiar with your local requirements and can make specific recommendations on improving your processes. Based on their expertise and and our dedicated instrumentation portfolio, they achieved remarkable results together with our customers.

  • 20%

    cost savings

    from reduced consumption of polymers

  • 25%

    longer filter life

    thanks to improved dewatering results

  • 3 million

    Proline Promag electromagnetic flowmeters have been sold since their launch in 1977 in a wide range of applications.

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