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A high-speed, high-temperature HT200S laboratory digester from Hach Lange has helped Smurfit Kappa SSK to cut analysis times by 75 per cent at its paper recycling plant.

It has also enabled the company to optimise the efficiency of anaerobic digestion to generate quality biogas, which helps to recycle the effluent waste produced on site.

By deploying the advanced HT200S, along with a DR2800 VIS Spectrophotometer at its biogas plant, the analysis of nutrient levels ensure that the anaerobic reactor is running effectively.

Prior to analysis in a DR2800, samples are digested in the HT200S, with digestion times for Nitrogen, Phosphate and Chemical Oxygen Demand (COD), which previously took two hours, now taking just 15min.

Ciaran Conroy, from Smurfit Kappa SSK, said: ‘The HT200S allows us to be more reactive to alterations in the process.

‘The speed of digestion is complimented by the fact that the HT200S cools the samples so that they can be transferred to the spectrophotometer immediately.’ He added: ‘The easy identification of COD and Volatile Fatty Acids (VFA) in the biogas reactor is just one example of this, enabling us to react in a matter of minutes, resulting in less time spent on maintaining the biogas reactor.’ The HT200S can also digest samples prior to analysis for Chromium, Tin, Silver and Total Organic Carbon (TOC).

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