Concern or Curiosity? Part 2 – Thiothrix and Type 021N Mike Foster, Principal Consultant – Environmental Business Specialists, LLC Paul Klopping, Principal Consultant – Callan & Brooks In part one of this series, we discussed the differences between activated sludge and aerated stabilization basins (ASBs) with regard to filamentous bacteria and filamentous bulking. We also [...]

Concern or Curiosity? Part 1 – Haliscomenobacter hydrossis Mike Foster, Principal Consultant – Environmental Business Specialists, LLC Paul Klopping, Principal Consultant – Callan & Brooks Filamentous bulking has long been the bane of activated sludge operations. Biomass or sludge bulking is generally defined as mixed liquor with a Settled Volume Index (SVI) of >150 ml/g. [...]

Useful Tool or Red Herring Mike Foster, Principal Consultant – EBS Paul Klopping, Principal Consultant – Callan & Brooks Filamentous bulking is a major problem for operators of municipal and industrial activated sludge systems. For the past thirty years, renowned scientists, such as Dick Eickelboom, David Jenkins, Glenn Daigger, and Michael Richard have written extensively [...]