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Hydrovac Slurry Dewatering

The Problem

Across the world, we are rapidly redeveloping and rebuilding urbanised areas. This rise in land development has increased the requirement for hydro excavation because of its reliability and accuracy. However the by-product of this highly reliable process is slurry. Made up of 60% water and 40% solids, hydrovac waste is difficult, not to mention expensive, for drilling operators to dispose of at landfill due it’s solid liquid state and weight. Instead hydro excavation slurry is usually treated as liquid waste and needs to be disposed of at liquid waste facilities which can be expensive.

Hydrovac trucks are having to drive miles to find legal dump sites to dispose of the waste, which is time consuming and costly to any business.

As well as this, some contractors are resorting to expensive commodities like sawdust to add to the hydrovac waste to solidify it increasing its weight for disposal which isn’t efficient or sustainable.

 

Our Solution

CDEnviro provide tailored solutions to act as bespoke reception centres for hydro excavation waste. Effective dewatering solutions, allow up to 85% of the material from the muds to be recovered.

Processing the waste on site is viable, practical and cost effective. By dealing with it in-situ, it removes the risk of having to transport possibly toxic substances to waste disposal companies preventing possible leaks or accidents during transport, which are always a danger.

Our solutions are designed according to the make-up and contamination levels of the waste and can include custom-made reception centers for receiving this Hydro Vac waste; processing it to recover sand, stone and organics and producing backfill as independent revenue streams. The solution also dewaters the final clay content to ensure easy and cost-effective disposal of the remaining material.

The recovered water can also be reused to fill outgoing trucks with industry compliant recycled water. Beyond this, if heavily contaminated, the hydrovac waste can be further processed to remove heavy metals and hydrocarbons from the waste water stream. This enables a wider range of more difficult (and therefore more lucrative) waste streams to be processed.

 

The Result

As a result of investing in a hydrovac dewatering solution, businesses realise many benefits:

  • Resource recovery- recovering valuable reusable material from hydro excavation slurry means significantly reducing the volume going to landfill and associated disposal costs.
  • Recovering clean dewatered fractions of sand, stone, and aggregates which can be sold for low grade construction applications, such as backfill, creating a new source of revenue.
  • A greater control of waste- companies will have a secure method of processing hydro excavation as opposed to either having to drive hours for a disposal site, or being at the mercy of other disposal facilities if they decide to close or increase their gate fee (particularly in remote areas where limited disposal sites are available).
  • An elimination of the legal and environmental risks associated with disposal

Overall, our solutions are providing customers across the globe with savings on landfill charges, prevening the need for extra investment in waste storage equipment, and creating a new dimension to their business.

Before

After

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