ABTO: Biomass a Challenge for Bulk Terminal Operators

Image Courtesy: Dry Bulk Terminals

Bulk terminal operators looking to make the transition from coal to biomass are facing challenges, it was emphasized at the Association of Bulk Terminal Operators’ (ABTO) inaugural conference, Bulk Terminals 2017, which took place last week in London.

“Biomass is not one material,” Mike Bradley, Director of the Wolfson Centre, said, urging terminal operator delegates at the conference to carefully evaluate the various types of biomass products before investing in new handling and storage facilities.

“Different biomass products have different requirements,” he added, explaining that biomass products can be made up of anything from organic residues, food waste, sewage, straw, cereal and olive stones to chipped wood, elephant grass, wet leaves and paper.

“The key is to understand the properties of the particular range of materials involved since no one handling system can deal with all types of biomass.”

Going on to highlight some of the unloading and handling challenges faced by operators looking to adapt their terminals for biomass, Bradley advised operators to keep a close eye on their quality control and safety procedures. Biomass dust, he said, is a particular challenge.

“Dust has caught more people out in biomass handling. It’s more mobile, it’s lighter and will stay suspended for longer,” he continued, adding that there is a danger that if not dealt with appropriately, it could result in terminal workers inhaling the dust and contracting “farmer’s lung”, the accumulation of mold spores in the lungs.

Bradley also said that the accumulation of biomass dust can increase the fire and explosion risks, particularly as some biomass cargoes are self-heating: “If you can write your name in the dust, you have an accident waiting to happen.”

The storage of biomass products, specifically wood pellets, was a key point raised by Mi-Rong (Kimberly) Wu from TBA. She informed that biomass volume, rather than weight, has to be taken into account when considering silos and storage facilities.

Wu said that because of its bulk density, more volume of solid biomass needs to be stored compared to coal and this would require about 1.3 times more land to accommodate the higher volumes. Wu also said that solid biomass is sensitive towards degradation and should not be stored for more than three months.

“Silos have been known to explode because of incorrect handling. For solid biomass products, temperature and CO emissions must be constantly monitored,” she told delegates.

Summing up her presentation, Wu said: “Solid biomass properties are in a wide variation range. For solid biomass handling, the volumetric performance should be the main benchmark rather than tonnage performance.”

For those terminal operators considering a transition from coal to biomass, Wu noted that adjustments in terms of handling processes and storage requirement are necessary, along with in-depth investigations into logistics and material characteristics.

David Wragg, Business Development Director at Hargreaves Industrial Services, also held a presentation which focused on the safety systems and technologies Hargreaves has installed in the Port of Tyne’s new biomass-handling facility.

What is more, Gary Sharpe, Project Director (Mersey) Peel Ports Group, detailed the infrastructure developments required of Merseyside’s Gladstone Biomass facility to handle 3Mtpa of wood pellets.

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