Water Quality Monitoring with the ZAPS LiquID Station

The LiquID Station is a unique and powerful real time water quality monitoring technology. It is an entirely optical system, that uses three techniques simultaneously to measure a wide range of water quality parameters in applications right across the entire water cycle. Visit the ZAPS website here.

The LiquID Station

  • Is a hybrid machine, using absorbance, fluorescence and reflectance measurement techniques through a single optical platform, thereby both enabling, for the first time, the real-time measurement of parameters such as BOD, TSS and E.Coli
  • Is a multispectral device, covering the spectrum from deep UV to near infrared, with hundreds of available measurement channels
  • Generates massive optical data which is combined with powerful proprietary algorithms to provide an unprecedented depth of information about the target water stream

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Specific Models and Parameters

Whether surface water or groundwater is used to supply a water treatment plant (WTP), it is important to know the quality of the feed water. This knowledge allows the WTP operator to adjust the process to meet the changing properties of the feed water. Coagulant, carbon and disinfectant dosing are examples of settings that may be adjusted to meet the changing requirements of the feed water. Simply “setting and forgetting” runs the risk of under dosing and compromising product water quality, or overdosing and wasting money.

Monitoring the quality of the feed water for TOC, Nitrates, FDOM, Chlorophylls, Turbidity and TSS can provide a wealth of information to assist the operator to make better decisions. Where source water is subject to contamination events, either through natural or man-made causes, it is crucial to be able to detect the contamination event, and then know whether the WTP is able to cope with the contamination, or whether additional action needs to be taken to mitigate the event. The LiquID can continuously monitor and alert the operator, to contamination by sewage, agricultural run-off and hydrocarbon or chemical spills.

Process optimisation and risk management are keys to success in operating a WTP.  Only by having continuous knowledge of important parameters such as TOC, Turbidity, TSS, UVA, SUVA, FDOM, Nitrates and E. Coli, can the operator have the comfort of knowing that the product water is within the target quality and regulatory limits, while having been produced at optimal cost.  The LiquID is an essential tool in the management of a WTP, and can be deployed at a range of critical control points within the process.

The emergence of wastewater and stormwater treatment and recycling, as a means of reducing the reliance on traditional drinking water sources, means that the treated water will be used to replace drinking water in a number of re-use applications.  High exposure risk applications such as toilet flushing, clothes and vehicle washing and unrestricted spray irrigation require rigorous risk management procedures, including on-line monitoring of a number of water quality parameters, as well as frequent and costly manual sampling and analysis.  A LiquID Station installed in a WWTP / Re-use facility can not only monitor the parameters required to manage the WWTP, but cam also monitor the key parameters that are required as part of the risk management protocols – including BOD, TSS,UVT, Ammonia, Nitrates and E. Coli.

  • TOC
  • UVA/UVT
  • Turbidity
  • TSS

  • Colour
  • NO2 + NO3
  • Chlorine
  • E. Coli


  • TOX (Total Organic Halides)
  • Chlorophyll -a/b
  • FDOM (Fluorescent Dissolved Organic Matter)
  • Refined Hyrdocarbons (Oil)

Many industrial processes are heavily dependent on water as a raw material, for washing, and for energy transfer.

Whether in pulp and paper making, food processing, pharmaceuticals manufacture, coal seam gas extraction or many other industries, water is an integral part of the manufacturing process. The management of its quality and cost are often key to the success of the enterprise.

The LiquID is a new and powerful tool allowing industries to:

  • Monitor input water quality
  • Monitor the performance of manufacturing processes
  • Monitor product quality
  • Ensure compliance with their wastewater discharge licences
We can work with customers to configure LiquID machines specifically to suit their processes including, where possible, the development and implementation of new and specialised parameter measurements.
  • TOC
  • BOD
  • cBOD
  • COD
  • TSS
  • NH3
  • NO2+NO3
  • Chlorine
  • E. Coli
  • UVA/UVT
  • Turbidity
  • Colour
  • TOX
  • Chlorophyll -a/b

  • FDOM
  • Refined Hyrdocarbons (Oil)
  • Airplane de-icing
  • Cysteine
  • Iron
  • And many more…

Traditionally, wastewater treatment plants (WWTPs) have been operated with very limited knowledge of what is going on in the treatment process. Critical process parameters, such as BOD, COD, TSS and disinfection performance have required lengthy and expensive testing procedures, with the result being that real process knowledge is sparse and historical. Operators have been forced to make decisions and process adjustments using experience and feel to make “best guesses.” The LiquID is a real game-changer – now we can measure BOD, COD, TSS, Ammonia, Nitrates and E. Coli (as well as many other parameters) in real time.

BOD can now be used as a real time input to process control systems, allowing large savings in blower energy consumption. Savings in the consumption of carbon dosing and disinfection chemicals and/or UV power can be made by measuring the carbon content and E. Coli directly in real time. In addition, the saving in the cost of sampling and laboratory testing along with improved knowledge of the process makes the LiquID a crucial management tool in WWTP operations.

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