top of page

Sludge Concentration

The Olpas Sludge Concentration sensors, use the innovative ultrasound OLPAS technology, thus providing a reliable and economical measurement.

The technology used, provides a fouling-resistant measurement of the sludge concentration, independent of sludge type or morphology.

There are several version available with a small transducer for easy inline installation, for installation with the Olpas hot-tap retractable, and versions that are optimised for installation in a bassin.
With the unprecedented fouling-resistance, which results in maintenance interval that are 4 times longer compared to optical sensors, the sensor provides an economic measurement that is several times cheaper compared to alternative technologies.

Several hardware versions are available, all using the same innovative OLPAS Technology.

Go to Shop
Sludge Concentration

A key-measurement to monitor aeration tanks...

Biological wastewater treatment, both aerobic or anaaerobic, relies on the acurate knowledge and controle of process parameters such as Total Suspended Solids (TSS) or MLSS (Mixed Liquor Suspended Solids). Specifically MLSS in aeration tanks is a key parameter to operate a wastewater treatment plant (WWTP) reliably.

and an essential measurement in the dewatering process

Measuring the sludge concentration at the inlet of the dewatering unit allows pro-active adaptation of the dewatering process. Knowing the variations in the ingoing sludge, is vital to determine the most optimal process: the parameters of the dewatering unit, and the amount of polymers to add.

An accurate measurement that swiftly follows the real concentration trend allows the control system logic to adapt the added polymer content or sludge flow-rate.


Where optical turbidity sensors fail

Current state-of-the-art optical sensors fail to measure the concentration accurately in changing conditions, due to their dependence on the optical parameters of the sludge. Furthermore, fouling is present after a few days of operation that cannot be fully reversed by the fault-prone mechanical wipers.


Available Product-variations

Sludge Concentration (with screen and buttons)

OTD-SDWA

Sludge Concentration (with screen and buttons)

An easy to install small transducer (sensor) connected to a dataprocessor unit with a screen and buttons.  

Small 90 x 100mm sensor for easy installation.

Go to Shop
Sludge Concentration (hot-tap transducer)

OTD-SDXA

Sludge Concentration (hot-tap transducer)

An easy to install small transducer (sensor) connected to a dataprocessor unit with a screen and buttons.
Extended transducer (sensor) for easy maintenance with the Hot-Tap retractable.

Go to Shop
MLSS / (activated) sludge concentration (Tentacle version)

OBO-MLSA

MLSS / (activated) sludge concentration (Tentacle version)

Factory callibrated sensor with modbus interface.  No screens or buttons necessary. 

Go to Shop
MLSS / (activated) sludge concentration (with screen and buttons)

OTD-MLSA

MLSS / (activated) sludge concentration (with screen and buttons)

An easy to install small transducer (sensor) connected to a dataprocessor unit with a screen and buttons.  
Small 90 x 100mm sensor for easy installation.

Go to Shop
Solids Concentration Measurement - Through Pipe (Clamp-on)

OTD-THRC

Solids Concentration Measurement - Through Pipe (Clamp-on)

Clamp-on sensor for measurement through pipe.

Go to Shop
MLSS / (activated) sludge concentration (Tentacle version with extended transducer)

OBO-MLSB

MLSS / (activated) sludge concentration (Tentacle version with extended transducer)

Factory callibrated sensor with Modbus interface. 

Extended transducer for easy installation and maintenance with Hot-Tap retractable.

Go to Shop
Dry Solids (%DS) Measurement in Iron water (modbus & low-power version)

OBO-IWAA

Dry Solids (%DS) Measurement in Iron water (modbus & low-power version)

Measurement of dry matter (dry solids, DS) in iron water, iron sludge, ferric (hydr)oxide. 


Go to Shop
Sludge Concentration (hot-tap transducer)

OBO-SDXA

Sludge Concentration (hot-tap transducer)

Factory callibrated sensor with Modbus interface. 

Extended transducer for easy installation and maintenance with Hot-Tap retractable.

Go to Shop

Related applications

Articles and blogposts

bottom of page