Landfill Leachate West Virgina

Case Study

Landfill Leachate West Virgina

Challenge

Our client was receiving fluid from frac operations for disposal directly into their landfill. The fluid had very low solids content <15%. The previous solidification method was to dump the fluid into a pit and mixing fly ash at a 2:1 ratio. The bulked up waste was then moved into a landfill cell for final disposition. The water catchment system was overloaded due to the ineffective solidification method and was destabilizing the landfill with water volume.

Solution

MetaFLO mobilized to site with our LMS 3 high shear mixing unit and flocculent. The vacuum truck offloaded the frac water waste into a recessed container. This fluid was then pumped through the LMS 3 to deliver our flocculent to the waste stream phase separating water from the solids at a .0015 wt/wt addition rate of a clay based MetaFLO flocculent.

Result

After treatment, the client received excellent water clarity / low turbidity in the separated brine water. The treated water was then pumped into a 20,000 gallon tank to be returned to the drillers for beneficial reuse. A small amount (<3%) of brine tolerant reagent was added to the separated semi-solids to fully solidify this phase for disposal in landfill as a firm, earth-like material.

reagents

Cabonne Shire WWT Lagoons

Key Stakeholders:

Owner: Vale Canada Ltd.
Contractor: Tervita Corp.
Distributor: Di-Corp

vale-tervita-di-corp

Challenge

Vale owns and operates a mining site in Northern Ontario, Canada. Through their mining and refining activities they produce a sludge waste by-product. The clients were in need of an efficient excavation and transportation solution to get this sludge to their off-site landfill.

Date

End of September 2018  -  Mid October 2018

Solution

During the bidding process, MetaFLO was engaged to provide an optimal blend and dosage rate to achieve the solids criteria required for excavation and transportation of the sludge. Using analytical data, MetaFLO estimated a dosage rate of 1.1% by weight (based on a high moisture content). Large mixing bins were recommended for increased surface contact and efficiency during the bucket mixing process. No sample was available at this time.

Result

Tervita Corporation utilized MetaFLO reagent to solidify approximately 4,000 m3 of sludge. Two 35m3 bins were staged on site and were loaded with a composite of “heavier” and “lighter” sludges. The originally estimated dosage rate was accurate as actual treatment averaged approximately 30lbs of MetaFLO MF006 reagent per m3 of sludge. All material was safely shipped to Vale’s off-site landfill. The job was completed on time.