Wash Wastewater Filtration with ADsorb-it®

Initial laboratory studies show ADsorb-it® sorbent to be very efficient in selectively adsorbing / absorbing petroleum and vegetable-derived hydrocarbons from water. This work was done using laboratory prepared and controlled test solutions. This test demonstrates ADsorb-it®’s sorbent effectiveness by testing real-world samples. Real-world samples measure not only the ability of the filter material to remove the pollutants of interest, but also to handle water that contains floating and dissolved hydrocarbons, emulsifiers and detergents, as well as debris that might affect filter performance.

Method

We were provided a five gallon sample of effluent from a logging truck wash station. The sample was thoroughly mixed and split into two sub-samples. One sub-sample was tested to determine suspected organic and inorganic pollutants. The other sub-sample was passed through a filter system using ADsorb-it® filter media and the filtered water was analyzed for the same pollutants.

Results of analytical chemistry are presented in the table below.

Results

Parameter

Method #
Result Unfiltered
Result ADsorb-it Filtered
Detection Limit
Units
Oil & Grease
EPA 1664
> 1000
6
5
ppm
Total Suspended Solids
EPA 160.2
230
10
5
ppm
#2 Diesel Fuel
NWTPHDX
910
3.4
0.2
ppm
Motor Oil
NWTPHDX
15000
3
0.4
ppm
Arsenic
EPA 6020
ND*
ND*
0.006
ppm
Cadmium
EPA 6020
0.0018
ND*
0.0005
ppm
Chromium
EPA 6020
0.013
0.0044
0.001
ppm
Copper
EPA 6010
0.077
ND*
0.01
ppm
Lead
EPA 6010
0.011
ND*
0.01
ppm
Zinc
EPA 6010
2.1
0.85
0.01
ppm

*ND = not detected at or above the method detection limit

Conclusions

As can be seen in the table above, ADsorb-it® sorbent was highly effective in removing organic pollutants and suspended solids from the sample. Especially notable is the reduction in oil and grease, diesel, and motor oil between the filtered and unfiltered samples.

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