Sludge Concentration (Solids concentration in sludge)
The Olpas Sludge Concentration sensor uses the innovative OLPAS measurement technology, thus providing a reliable and economical measurement.
The technology provides a fouling-resistant measurement of sludge concentration, independent of sludge type or morphology. The unprecedented maintenance interval, and with an easy inline installation that is independent of pipe-size, the sensor provides an economic measurement that is several times cheaper compared to alternative technologies.
Multiple versions of the sensor hardware are available: a robust pre-calibrated sensor for inline mounting, and a version with seprate dataprocessor with a screen and selection keys. When applicable, we also provide a version optimised for installation in a bassin.
The optional hot-tap mounting support can be provided for easy installation and maintenance.
An essential parameter to monitor the dewatering process
Measuring the sludge concentration at the inlet of the dewatering unit allows pro-active adaptation of the dewatering process. Monitoring variations in 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 reliable measurement that swiftly follows the concentration trend allows the control system logic to adapt the sludge flow-rate, dewatering-parameters and PE-concentration to be added.
Key features
A reliable drift-resistant measurement of sludge concentration
Fouling resistance, also in challenging environments
Easy inline mounting, with the (optional) hot-tap mounting support. Cost independent of pipe-size.
An Olpas sensor 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 (sometimes even hours!) of operation which cannot be fully reversed by the fault-prone mechanical wipers or pressured air cleaning.
An Olpas sensor as an economic alternative to microwave sensors
Sensors using microwave measurement technology are often used as an alternative for measurement in circumstances where optical parameters fail. Sticky sludge or frequently changing optical parameters are harmful for a reliable optical measurement. Thats where microwave based sensors come around.
These sensors however are expensive to buy, and expensive to install, with a cost that depends on the specifics of the installation (size of pipe).
Microwave sensors also need in-situ calibration per sludge type, making the technology not suitable for measurements in installations with varying sludge sources.
Comparison of Olpas Slude Concentration sensor to traditional measurements
Olpas Sensors | Optical (UV) | Microwave | Sampling | |
Economic sensor (Product cost) | ✅ | ✅ | ❌ | Not applicable |
Economic sensor (Installation) | ✅ | ✅ | ❌ | Not applicable |
Economic sensor (Maintenance) | ✅ | ❌ | ✅ | Not applicable |
Applicable in high turbidity medium? | ✅ | ❌ Not applicable | ✅ | ✅ |
Unaffected by signal reflection of iron particles? | ✅ | ✅ | ❌ Not applicable (☠️) | ✅ |
Unaffected by colour variations? | ✅ | ❌ | ✅ | ✅ |
Online measurement | ✅ | ✅ | ✅ | ❌ |
Maintenance interval required | x1 per month recommended | x2 per week | x1 per month | Manual action |
Available Products
Number of selected Products:
6
OTD-SDWE
Sludge Cake Concentration - Grabbing Solution and Sensor
The Olpas sludge concentration measurement system consists of a dataprocessor and ultrasound transducer, with a sample grabber. The system is capable of measuring sludge in concentrations from 0 - 40 %DS.
The Olpas ultrasound technology provides a fouling-resistant measurement of the sludge concentration, independent of sludge type or morphology.
