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H+E, one of the leading providers of industrial process and wastewater treatment on the international market, has been awarded a contract for a complete wastewater treatment for a sugar producer in Croatia.

Having designed and built more than 40 treatment systems for sugar production worldwide, including plants in Lithuania, Egypt and Chile, H+E has a huge amount of experience with the rather unusual requirements of this type of wastewater.

The sugar industry uses flume water circuits for the cleaning of the delivered sugar beet. Many companies use the so-called alkaline mode of operation. This involves adding lime to the water, which reduces odour pollution, improves the settleability of the washed-off soil and reduces corrosion in the pipelines, thereby also minimising maintenance costs.

But using lime also results in wastewaters with high calcium content and a strong tendency to precipitate lime-containing solids. These precipitates lead to extensive operational problems in anaerobic wastewater treatment and to clogging of the membrane aerators in aerobic wastewater treatment, thus considerably reducing the capacity of the treatment plant.

But, H+E offers solutions to these problems that were specifically developed to deal with the issues resulting from the use of lime in sugar industry wastewater. These technological innovations include ANAFIT®.CS, one of the water treatment solutions from our ANAFIT® product range. Based on the anaerobic contact sludge process, ANAFIT®.CS is a reliable, proven and effective process for the treatment of the calcium-rich, organically highly loaded wastewaters from the sugar industry.

H+E also offers other process technologies for wastewater from the sugar industry: For example, the BIOFIT®.N treatment for nitrification/denitrification in an aerobic stage. Here, H+E’s specially developed aerators are used which, even at high calcium concentrations, reliably supply oxygen over years without requiring any maintenance.

In Croatia, industrial companies have faced stricter quality requirements in recent years following accession to the EU. Due to this, the client decided to invest in a new treatment plant including anaerobic and an aerobic stages. We arranged a visit to a nearby reference plant, which helped to convinced the customer of our experience and expertise.

The wastewater treatment plant will go into operation for the 2017/18 sugar campaign.

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