CST Wastewater Solutions wins sustainable manufacturing award: video

CST Wastewater Solutions claimed the Sustainable Manufacturing award at this year's Food magazine awards, for its Chok Chai Starch RAPTOR.

CST Wastewater Solutions is an Australian company and a member of the Global Water and Energy Alliance, a group of companies around the world committed to providing solutions in waste and wastewater treatment for the recovery of green energy and water.

The RAPTOR anaerobic wastewater technology with ANAMIX thermophilic digester, for the processing of waste cassava pulp and its conversion into biogas, has been installed by Global Water Engineering at the Chok Chai Starch tapioca starch plant in Uthai Thani, Thailand.

CST says the technology, broadly applicable to food and agricultural industries in Australia, is an environmental boon in that it processes and converts the leftover fresh cassava pulp, which starts to ferment once stored, into useful green energy. The rotting organic material would otherwise generate a considerable odour and release heavily polluted wastewater from mountainous pulp piles.

Chok Chai Starch's Thermophilic RAPTOR – the world's first plant to incorporate the thermophilic biological digestion process for cassava pulp – not only greatly reduces leftover pulp, but boosts the plant's existing biogas production to replace fossil fuels and to generate electricity. 

The Chok Chai Starch RAPTOR starch plant produces enough biogas to generate 3.3 to 3.4 MW of renewable electricity for sale to the local grid, while the biogas produced by previously installed ANUBIX B reactors is heating the factory's two thermal oil boilers using green energy produced from digestion of organic matter in its wastewater.

"Advanced anaerobic technology such as that installed at Chok Chai Starch is also strongly applicable to any factory or process with one or more digestible solid waste streams," said Global Water Engineering CEO, Jean Pierre Ombregt. "Such plants – including breweries, fruit, food waste, agro industries, and energy crops including corn, can easily use this technology to generate energy. It opens the door to environmental and production efficiency gains globally."



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