- On-line Toxicity Analyzer

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The Ra-TOX® is able to detect and measure wastewater streams that present an acute or chronic toxicity to the biomass of a treatment plant. This allows operators to take corrective measures to protect the viability of the waste water treatment plant, e.g. by storing the toxic water in a buffer tank. With a response time of 15 minutes, toxic compounds present in the wastewater can be detected in an early stage by the Ra-TOX®. The on-line analyzer thus functions as an early warning system and, indirectly, as a continuous assessment of a healthy respiration rate of the biomass.

The measurements are carried out on real sludge freshly sampled from the customer’s waste water treatment plant (WWTP), by means of self-cleaning sampling-filtration systems (option). This unique approach to respirometry has the following advantages:

  • Dynamic changes in biomass viability are taken into account
  • Measurement at same pH as the WWTP
  • Measurement at same temperature as the WWTP

Second generation design

The second generation Ra-TOX® On-line Toxicity Analyzer has been downscaled to a compact, light-weight unit with improved analytical performance and significantly reduced consumption, yet retaining all the benefits of the single DO sensor design, and the continuous use of sludge sampled from the WWTP:

  • Built-in automatic cleaning and calibration
  • Shorter pathways for waste water and sludge
  • Transparent door allows instant 180° visual inspection
  • Reduced environmental footprint (60% weight reduction)

  • Detection of acute and chronic toxicity on the activated sludge of waste water treatment plants
  • Measurement of the respiration rate by means of a single dissolved oxygen (DO) sensor
  • Low consumption of nutrient, sludge and waste water
  • Second generation design with small footprint, shorter liquid pathways and simple maintenance
  • Complete separation between electronics and wet part
  • Low maintenance requirements
  • Multiplexing up to eight (8) sampling points possible
  • Incorporated industrial PC with AppliTek controller software
  • Extended data communication and exchange features

Analysis method
Determination of toxicity by respirometry

Measuring ranges
Toxicity: one single range, factory set:
0 – 100 %
Max. respiration rate:
Range is application depending (mg/L.h)

Cycle time
15 minutes
Remark: contact time is programmable

Calibration
Automatic, at every analysis cycle

Cleaning
Automatic, free adjustable sequence

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