Trucking & Transportation

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Managing wastewater at a tank truck washing facility depends on the size of the site and the resources available.

Tank truck interior washing operations generate one of the most complex and difficult to treat wastewaters.

The materials hauled by tankers vary widely in character and often may be highly toxic. The wastewaters from tank truck cleanings reflect these characteristics in their highly and rapidly varying composition. The wastewaters contain high concentrations of oils and organics which may be free, emulsified, or dissolved, and suspended solids.

The wastewater needs to be treated for removal of free oils and organics and suspended solids prior to treatment for dissolved organics.

Wastewater types generated from tank truck washing as classified by the US Environmental Protection Agency (EPA):

  • Interior cleaning wastewater
  • Exterior cleaning wastewater
  • Equipment and floor washings
  • TEC-contaminated stormwater
  • Wastewater prerinse cleaning solutions
  • Chemical cleaning solutions
  • Final rinse solutions

Contact Aries Tek for processing wastewater from truck tank washing systems…

Oil/water separators

Oil/water separators are tanks that collect oily tank truck wash water that flows along corrugated plates to encourage separation of solids and oil droplets. The oily solids or sludge can then be pumped out of the system through a different pipe. The sludge can be hauled off-site, and the wash water can be discharged to vegetated areas or to a treatment plant.

There are two types of oil/water separators, one that removes free oil that floats on top of water, and one that removes emulsified oil, a mixture of oil, water, chemicals and dirt.

Collection sumps

Collection sumps are deep pits or reservoirs that hold liquid waste.

Tank truck washing water accumulates in the collection sumps, and is pumped or siphoned to a vegetated area (such as a grassed swale or constructed wetland).

Sediment traps

Sediment traps can also be used to strain and collect the tank truck wash water, prior to pumping or siphoning the wash water to a vegetated area.

Recycling systems

Recycling systems reduce or eliminate contaminated discharges to storm water drains and injection wells by reusing the wash water until the water reaches a certain contaminant level. The wastewater is then discharged to a collection sump or to a treatment facility.

Contact Aries Tek for processing wastewater from truck tank washing systems…

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