Saving Money on Dredging Through Measured Sludge at a Pulp and Paper Mill

Client’s Challenges:

Identify whether dredging in cells 1 and 2 was necessary and determine sludge volume and composition for dredge project budgeting.

Hydrasurvey’s Solution:

Hydrasurvey conducted lagoon surveys in two aerated cells at the town of Fernie, BC's wastewater lagoon.

  • The bathymetric sludge surveys determined the in-situ sludge volume, dry tonnes of sludge, sludge composition and showed the influence of the aeration system on the sludge, which allowed contractors to provide accurate pricing to dredge the cells.

  • The lagoon sludge survey also showed a possible restriction issue with the aeration in cell 2. A localized build-up of sludge in cell 2 appeared to be burying aeration diffusers and causing more of a sludge build-up near the cell inlet. This allowed the town to specifically assess the aeration in that particular area of the pond.

 

Optimize Your Wastewater Lagoon Management

With our industry-leading sludge mapping technology and expert wastewater analysis, HydraSurvey delivers actionable data to support efficient, cost-effective lagoon maintenance.