Glanbia Final Effluent

TThe Biotector 970 provides reliable and accurate measurement of low COD levels in final effluent.
  • Reliable analysis with COD levels as low as 10 mgO/l.
  • Average sampler ensures that a representative sample is taken from fast flowing effluent streams.
  • Field-programmable delay between each analysis ensures minimal usage of reagents on slow streams.

General Background

Glanbia Plc, Ballyragget, Co. Kilkenny, Ireland
Accurate analysis is required to comply with stringent EPA discharge license requirements. Here, typical COD readings are in the order of 10 mgO/l - several orders of magnitude lower than that of the incoming waste to the waste water treatment plant.

Application Description

Both discharge points, while having similarly low COD levels, differ dramatically from each other in that the cooling tower stream is fast flowing, while the water leaving the WWT plant is slow moving. The BioTectors monitoring the final effluent were both individually optimized for these conditions.

  • The BioTector monitoring the fast flowing stream is equipped with an Average Sampler. The operation of the Average Sampler is controlled by the BioTector. It generates a composite sample for the BioTector to analyze. After the Biotector has taken its sample, the Average Sampler automatically empties and immediately starts to generate a new composite sample.

  • The BioTector monitoring the slow moving stream was optimized by programming its microcontroller to delay between each analysis. This significantly reduced the usage of reagents and running costs associated with that application, while maintaining reliable, representative analysis.