Siltbuster’s MBBR technology operating in Somerset, UK.
Siltbuster’s MBBR technology operating in Somerset, UK.

Siltbuster Process Solutions (SPS), a UK manufacturer of treatment systems for municipal and industrial wastewater sectors, recently partnered with Wessex Water, to provide its MBBR technology during a bio-filter refurbishment.

The refurbishment work took place at Wessex Water’s Wellington wastewater treatment plant in Somerset, UK. The plant’s bio-filter beds needed to be taken off-line one at a time, but this would have left insufficient biological capacity to treat the flows and loads.

SPS installed three temporary Moving Bed Biofilm Reactor (MBBR) treatment units through which a proportion of the partially treated bio-filter effluent was passed. Following biological treatment in the MBBR 30s, the flow gravitated to existing humus tanks for secondary settlement before discharge.

Operating in parallel, and with each unit having a dedicated skid mounted duty/standby blower arrangement, the three SPS units were able to treat a combined maximum flow rate of 90m3 per hour, removing predominantly ammonia and a small amount of residual BOD.

Jill Smith, technical manager at Wessex Water, said: “The MBBRs provided us with an effective solution that ensures we remain compliant with our Environment Agency limits during the necessary refurbishment work.”