AECOM Process Technologies offers the Concrete Dewatering Tank as a lower-cost solution to ELG and CCR compliance.
The Concrete Dewatering Tank (CDT) is designed as a series of integrated settling basins that effectively remove solids, oil and grease from ash transport water and low-volume wastewater as it flows through the system. With incorporated pH and temperature control, the treated water can either be discharged or reused.
A combination of natural and chemically-enhanced settling permits the removal of solids using an excavator, which are allowed to drain on a concrete pad that slopes towards the CDT until they are dry enough for transport to a landfill or for beneficial use.
Compared to other technologies, the CDT minimizes storage volume and rotating and redundant equipment. With solids excavation remaining largely manual, a lower capital investment is required.