Worlington, England

FLEXIBLE BIOGAS PLANT WITH PROVEN HOST TECHNOLOGY

Following construction of the Euston biogas plant in 2014, located near Thetford, UK, HoSt has since built a second gas to grid digestion plant for the same customer. The Bay Farm biogas plant was constructed in 2016 and successfully commissioned in early 2017, located near to the village of Worlington in Suffolk, only a few miles from the original Euston plant.

The ‘Bay Farm’ plant, utilising proven HoSt digestion technology, is equipped with two types of solid feedstock reception bin, including a ‘walking floor’ system in combination with a conventional auger mixed unit. The functionality of these two designs work in a complimentary way, providing the plant operator with significant feedstock input flexibility. Following reception, a second pre-treatment stage is where the feedstock is chopped, mixed and blended with recirculation liquid, before being pumped to the digesters. An additional level of process flexibility and performance is achieved using containerised pumping headers, where the blended feedstock liquid can be transferred directly to either primary or secondary digester, depending on factors such as dry matter content and estimated required retention time.

PROCESS FLEXIBILITY

A major advantage of the process flexibility of the plant is that the operator can receive a wide range of solid biomass inputs, also including liquids into the reception tank. This means that the operator can bring in many different feedstock materials in response to their availability and price in the market. The following products are an example of the feedstock range digested at the plant; including slurry, maize silage, brewers grain, cereal grain waste, grass silage, sugar beet, sugar beet pulp, rye and vegetable waste.