IFM was engaged to develop a treatment process for the owner of several disposal wells in response to the enormous amount of process water created by hydraulic fracking. IFM erected and ran a scaled pilot on site, with the owner providing real loads of the water to test. The owner felt that if the total suspended solids could be reduced, he could protect his wells.
All of the tested streams exhibited various levels of total suspended solids (TSS), hydrocarbons and some oil but IFM was able to clarify and dewater these materials successfully. It was determined, from the pilot, that consistent oil removal and TSS reduction will require a two-step approach.
Primary treatment would be similar to the pilot conducted with the main components being designed around the horizontal clarifier and filter press and the secondary treatment is recommended to produce consistent clean water. The secondary component will provide additional treatment of high total suspended solids water that makes it through the horizontal clarifier.
This secondary equipment consists of ultrafiltration that can serve as additional solids / liquid separation and thickening prior to dewatering without additional chemicals. It also produces excellent filtered water quality from water that may be concentrated as high as 40-50%. It can be reasonably expected that the UF permeate will be much higher quality that current filtered water being rejected.
Attached is the full case study.