Analyzers, in-situ sensorsand samplers

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Experts in liquid analysis

Analyzers and samplers in wastewater treatment

Preliminary sedimentation During primary treatment, the wastewater is separated into „generally liquid substances“ - the water part - and „generally solid substances“ - the sludge part. The water part contains organic carbon as well as nitrate and ammonium. These are known as nutrient parameters. What is measured? • TOC and SAC measurements provide information on the carbon load entering the plant > CAS51D, CAS80E, CA72TOC • Ammonium measurement provides information on the amount of nitrogen in the wastewater. This nitrogen also has to be digested in the biological treatment phase > CAS40D, CA80AM with CAT860, CA80TN • Sampling enables a detailed analysis of the introduced water. These measurements taken prior to sludge activation make it possible to detect load spikes and to redirect these into buffer basins. Their subsequent return to the wastewater treatment process allows for safe and smoother system operation. The discharge values can be maintained at any time.

Denitrification and recirculation Wastewater and activated sludge are merged during this process. If oxygen is not present, nitrate is reduced to basic nitrogen. This is the first step in the biological treatment process. Carbon serves as a source of nutrition for the bacteria and is also reduced. What is measured? • The measured COD value provides information on the amount of carbon in the biological treatment process > CA80COD, CAS51D, CAS80E • Nitrate measurement indicates the nitrate nitrogen which is reduced during this stage of the process > CAS51D, CAS80E The next stage of the treatment process can commence as soon as the nitrate is processed. A low concentration of nitrate in the denitrification stage is essential to achieving low concentrations in the outlet and thus reducing wastewater charges. By determining values for the sludge parameters it is possible to optimally control the sludge process.

Ammonium, TOC, SAC, sampler

Nitrate, COD eq

Preliminary sedimentation

Denitrification