Analytical Instrumentation & Environmental Monitoring

Detection of contamination from heavey metals and organic contaminants

March 2000 Analytical Instrumentation & Environmental Monitoring

Water contamination can take many forms, therefore the broader the range of contaminants detected, the better the chances are of ensuring uninterrupted plant operation and biomass protection. Traditional laboratory test methods, such as whole organism bioassays and COD testing, can convey an incomplete picture of water quality.

The Microtox-OS test system from Siemens Environmental Systems is claimed to be the only on-line water quality testing instrument capable of detecting contamination from heavy metals, organics, pesticides, and herbicides, among others. This is an important safeguard when the user is trying to optimise plant performance and minimise operational costs. In addition, the system provides the speed, automated sample preparation, toxicity alarms and remote data access that are simply not available in other testing methods.

A test system is only as good as the validity of its test results. This is why the Microtox-OS has multiple crosschecks to ensure reliability of test data.

The first check is an automated biodetector verification (BDV) protocol. The Microtox-OS test reagent is tested immediately upon reconstitution to measure and ensure the response to a given standard. If the reagent vial is rejected, the reagent carousel rotates to the next vial. The BDV protocol can be programmed to execute at user-set intervals - every new carousel, every day, or any interval in between.

The Microtox-OS test system calibrates itself automatically to assure standardised results. Finally the entire system is temperature controlled to ensure stability of the test reagent.

Wastewater treatment plant operators can program the Microtox-OS test system to identify seasonal and operational trends. It can also help plant personnel troubleshoot problems and fine-tune plant operation.

The system incorporates a proprietary learning mode algorithm, whereby the System 'learns' normal baselines for acceptable and unacceptable water quality. Thus, the System allows the user to adjust the internal alarm thresholds accordingly.

Learning mode provides the system with the means to compensate for seasonal water quality changes or industrial production variances. Therefore, heavy stormwater runoff or cyclical spikes in production output will not trigger an unnecessary false alert.

Up to 30 days of data are automatically archived in memory within the Microtox-OS test system. Data can be uploaded via modem to the computer, scada system or monitoring station, allowing the latest data collected from the Microtox-OS test system to be readily available. Data can even be imported into spreadsheet applications such as Microsoft Excel for analysis. This flexibility even allows Azur technicians to remotely troubleshoot, perform diagnostic checks or upgrade software on systems located anywhere in the world.

OEN Enterprises

(011) 792 2859


Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Two-gas detection monitor
July 2021, Comtest , Analytical Instrumentation & Environmental Monitoring
New lightweight two-gas monitor offers more accurate alarms and minimises maintenance with a two-year runtime.

MAP – making the right choice for gas analysis
August 2021, Elemental Analytics , Analytical Instrumentation & Environmental Monitoring
Modified atmosphere packaging (MAP) is used within the food and pharmaceutical sectors to extend the shelf life of many products that would otherwise deteriorate quickly in the presence of oxygen.

Accurate particle matter measurement
June 2021, GHM Messtechnik SA , Analytical Instrumentation & Environmental Monitoring
The PMsense datalogger has particular applications in smart city applications and the monitoring of particle matter pollutants found at industrial sites.

24/7 boiler monitoring with the SWAS Compact
June 2021, Endress+Hauser South Africa , Analytical Instrumentation & Environmental Monitoring
Endress+Hauser has developed a compact new steam analysis device for continuous boiler water monitoring.

Flexibility for disinfection measuring points
April 2021, Endress+Hauser South Africa , Analytical Instrumentation & Environmental Monitoring
Endress+Hauser’s new modular Flowfit CYA27 flow assembly enables measurement of up to six parameters in process and drinking water.

Alkylation processes in petroleum refineries
April 2021, Morton Controls , Analytical Instrumentation & Environmental Monitoring
The SensoTech LiquiSonic is an inline analytical system for determining the concentration of binary liquids directly in the production process.

A safe and easy way to check water quality
March 2021, Endress+Hauser South Africa , Analytical Instrumentation & Environmental Monitoring
Ready-to-use water analysis panels from Endress+Hauser ensure water monitoring with minimum effort and maximum reliability.

ABB urges adoption of high-efficiency motors to combat climate change
April 2021, ABB South Africa , Analytical Instrumentation & Environmental Monitoring, Electrical Power & Protection
Global electricity consumption could be reduced by 10%.

Loop-powered watercut meter
May 2021, SECO Process Instrumentation , Analytical Instrumentation & Environmental Monitoring
The Easz-1 oil/water monitor is a highly accurate online analyser that is installed in a pipe and can be used as a BS&W (basic sediment and water) monitor, or a watercut meter.

Optimising DeNOx plants with the in-situ gas analyser
February 2021, SICK Automation Southern Africa , Analytical Instrumentation & Environmental Monitoring
SICK Automation’s innovative new GM32 in-situ gas analyser helps reduce emissions in DeNOx plants.