Rehabilitation/ Repairs of Biological Aeration Filters (Biofors)

Butier Engineering, Inc. was selected to provide construction management and inspection services for the rehabilitation and repairs of nine (9) 32,000-gallon steel wastewater treatment tanks called biological aeration filers (Biofors). To maintain the recycled water supply, each Biofor was removed from service one at a time.

Scope of Work

• Removal, storage, and disposal of media and gravel
• Removal of all 1600 nozzles and 1600 diffuser sections
• Cleaning of the filter plenum and media bed internals
• Sampling and testing of scale material
• Internal and external inspection
• Abrasive blasting of internal/external surfaces of each Biofor
• Removal, wash, repair, and replacement of internal nozzle piping and air diffusers
• Grinding, sanding, welding, and repairing pitted and corroded metal