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DP Cleantech wins Maltese AD plant upgrade contract

China-headed renewable energy and environmental services company DP CleanTech Group has announced that it has recently signed a contract to upgrade the Mechanical Biological Treatment (MBT) plant at the Sant’Antnin Waste Treatment Plant in Malta.

View over Valetta, Malta.

DP CleanTech Group has announced that it has recently signed a contract to upgrade the Mechanical Biological Treatment (MBT) plant at the Sant’Antnin Waste Treatment Plant in Malta.

Operated by waste services company Wasteserv, the Sant’Antnin plant consists of a Materials Recovery Facility (MRF) and a Mechanical Biological Treatment (MBT) plant. The MBT plant design was based on ‘wet’ anaerobic digestion (AD) technology, with pulper sand sedimentation units used to treat up to 250 tonnes per day (tpd) of screened organic fraction of municipal solid waste (MSW),  prior to a two-step anaerobic process.

However, the plant was falling short of the expected performance standards, with some resulting odour problems. There was also an impending change in the waste input which suggested that a review of the system was appropriate.

The study concluded that the existing pre-treatment system should be replaced, and the DP Anaerobic Digestion of Organic Slurry (ADOS) solution was selected.

Proprietary technology

Part of the IuT Group acquisition in May 2018, the ADOS solution for pre-treatment uses a semi-dry technique which enhances the benefits of wet and dry processing techniques, whilst minimising their disadvantages.

According to DP CleanTech, the ADOS solution effectively addresses the odour problems by processing the 250 tpd kitchen waste within a 10 hour time period and within a fully enclosed pre-treatment system. This eliminates possible odour problems created by prolonged storage and leachate accumulation.

Furthermore, the ADOS technique itself increases the efficiency and quality of the digestate to produce higher quality digestate and improved gas yields. It is easily adapted for different types of organic waste and therefore highly suitable for long term waste management strategies.

The full-service contract – delivery, installation and commissioning – is expected to be completed by the end of this year, with commissioning in Q1 of 2020.

Our long experience in anaerobic digestion and our proprietary know-how enabled us to see very quickly how we could significantly enhance the operation at the Sant’Antnin AD plant. I am delighted that Wasteserv has shown confidence in our solution and we look forward to furthering our relationship in other areas of their waste management as they pursue their aim to establish and maintain an innovative and sustainable waste management infrastructure in Malta, said Reinhard Goeschl, Director of DP Waste Management.

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