The Wet Electrostatic Precipitator (ESP) works similarly to dry ESPs that are widely used by power plants to capture particulate matter. The
particulate matter is charged and then captured on the grounded collecting electrodes.
Southern Environmental Inc.'s wet ESP uses a unique fabric membrane as the collecting electrodes. The membranes are continuously and uniformly
irrigated with water to promote efficient capture of fine particulate (PM2.5) and acid gases such as SO3 mist.
The water also lowers the flue gas temperature, promoting condensation that could lead to the recovery of moisture from the flue gas.
Gather data to determine any operational or maintenance challenges.
Determine unit's ability to recover moisture in flue gas and characterize the recovered water for reuse in other processes.
Determine Wet ESP's ability to remove fine particulate and acid gases from the flue gas.
Landfill Leachate Management - Lysimeters
Landfill columns will be used to simulate the disposal of coal combustion products (CCP). Water percolating through a landfill is hard to
replicate at a bench scale; therefore, these larger columns will be used to account for real-life conditions in landfills.
Each column will be filled with representative CCPs from around the utility industry. The intention is to examine the effects of air-emission
control sorbents, as well as zero-liquid discharge and other wastewater treatment residues, on leachate from coal ash landfills.
The columns will function by collecting rainwater and directing it onto the landfill columns. The movement of the water down the column will be
monitored and leachate samples taken weekly.
Collected data, along with bench scale research, will provide the utility industry with characterization of CCP materials that are
affected by air emission and wastewater control technologies.
Technologies to solidify and stabilize wastewater treatment byproducts will be tested for effectiveness and longevity.
Industry-wide best practices for air and water pollution control residue disposal will be developed.
Water Treatment | Hydro-Optic UV Light
The Atlantium Hydro-Optic Ultraviolet (UV) Light technology can harness UV light to deliver maximum dechlorination and disinfection to incoming power plant
waters. The Atlantium technology uses quartz rather than the traditional metal reflecting chamber to optimize the fiber optic impact and the length of travel for
Power plants must produce extremely pure water for the boilers to produce steam. At Plant Bowen, water is chlorinated prior to being sent through cartridge
filters to prevent the growth of microorganisms in the filters. The water is then dechlorinated with the addition of sodium bisulfate to prevent deterioration of
the reverse osmosis (RO) membranes.
The Atlantium technology will be used prior to the cartridge filters to kill the microorganisms and upstream of the RO system to dechlorinate the water and extend membrane life.
Determine if UV light can extend the life of RO membranes by dechlorinating the water, reducing the need for dechlorination chemicals (e.g., sodium bisulfate, sodium sulfite, or sulfur dioxide).
Determine if UV light can successfully disinfect the water and minimize the need for chlorine and biocides.
Evaluate the operational and maintenance needs of the technology.
Advanced Cooling | Thermosyphon Cooler
A thermosyphon cooler, developed by Johnson Controls, is a new technology that could significantly reduce the water needed for power plant cooling towers.
The technology transfers heat to the environment without evaporative water loss by using an air-cooled refrigerant that pre-cools water before it enters the
cooling tower. The year-long testing will document the technology's water savings potential and energy consumption characteristics.
Determine how much water can be saved by operating a thermosyphon cooler with a wet cooling tower.
Determine the energy consumed by the thermosyphon cooler technology.
Compare the thermosyphon cooler concept to a conventional cooling tower system.
Wastewater Treatment | Adiabatic Evaporator
The Heartland adiabatic LM-HT® wastewater evaporator was originally developed for the treatment of wastewater generated from oil and gas field operations.
Evaporation was driven by heat from a burner.
The technology converts wastewater into a concentrated brine and a pure water stream; it can treat water containing high dissolved solid content with minimal
fouling of the equipment. Through evaporation, the process yields concentrated slurry from which solids may be separated by conventional techniques. The
evaporated water can be condensed for reuse or vented to the atmosphere as pure steam. The residual liquid and dissolved solids are continuously returned to the
evaporation zone, and the solids are conditioned as required for disposal.
This project will evaluate the effectiveness of the Heartland evaporator for treating Flue Gas Desulfurization wastewater when using power plant heat by diverting a small amount of flue gas from upstream of the air preheater to the evaporator. The demonstration also will determine the effect of fly ash on the treatment
process and the characteristic of trace metals in the concentrated brine.
Overcome operational difficulties and high energy costs of conventional thermal zero-liquid discharge (ZLD) treatment options.
Demonstrate reduced frequency for cleaning, plus simplified cleaning, compared with conventional process equipment.
Evaluate impacts of fly ash while using flue gas for a thermal energy source.
Determine the characteristics of the solids removed from the water and disposal or use options.
Advanced Cooling | Eco Wet-Dry Cooler
The eco wet-dry cooling tower, developed by EVAPCO, could conserve water and energy used at power plants by using an innovative wet-dry fluid technology.
The cooling tower works in wet-dry mode during the hot summer months and in dry mode other times of the year.
In wet-dry mode, hot water is first cooled through dry coils and further cooled through additional tubes sprayed with treated water.
In dry mode, the spray system is off, using no water and no water treatment chemicals.
In addition, the eco wet-dry cooler has a limited visible water cloud, or condensate plume, in wet-dry mode and zero visible plume in dry mode.
Gather performance and operation data under varying loads and year-round weather conditions.
Demonstrate the ability of the eco wet-dry cooler to switch operation at a high switch-over temperature.
Demonstrate the eco wet-dry cooler's ability to conserve water, energy and chemicals.
Demonstrate the eco wet-dry cooler's ability to reduce plume visibility.
Technology: New Logic Research has developed Vibratory Shear Enhanced Processing (VSEP) to mitigate scaling and fouling of membranes used for pollutant removal
The VSEP membrane filter pack consists of trays arrayed as parallel discs and spaced with gaskets. Vigorous vibration of membranes cleans solids from the surface.
The filter sits on a torsion spring and oscillates back and forth rapidly. This movement at the membrane surface is approximately 10 times greater than
conventional crossflow membrane systems enabling the membranes to continue removing pollutants effectively.
Evaluate the effectiveness of VSEP to treat Flue Gas Desulfurization wastewater.
Evaluate operational conditions for minimization of fouling and extended membrane life.