Abstract: A harmful substance removal system and method include a direct contact liquid concentrator having a gas inlet, a gas outlet, a mixing chamber disposed between the gas inlet and the gas outlet, and a liquid inlet for importing liquid into the mixing chamber. Gas and liquid mixing are mixed in the mixing chamber and a portion of the liquid is vaporized. A demister is disposed downstream of the mixing chamber. The demister includes at least one stage of mist elimination having a first filter that removes liquid droplets less than 9 microns in size. A fan is coupled to the demister to assist gas flow through the mixing chamber.

Abstract: A harmful substance removal system and method include a direct contact liquid concentrator having a gas inlet, a gas outlet, a mixing chamber disposed between the gas inlet and the gas outlet, and a liquid inlet for importing liquid into the mixing chamber. Gas and liquid mixing in the are mixed chamber and a portion of the liquid is vaporized. A demister is disposed downstream of the mixing chamber. The demister includes at least one stage of mist elimination having a first filter that removes particles greater than 9 microns. A fan is coupled to the demister to assist gas flow through the mixing chamber.

Abstract: A harmful substance removal system and method include a direct contact liquid concentrator having a gas inlet, a gas outlet, a mixing chamber disposed between the gas inlet and the gas outlet, and a liquid inlet for importing liquid into the mixing chamber. Gas and liquid mixing in the are mixed chamber and a portion of the liquid is vaporized. A demister is disposed downstream of the mixing chamber. The demister includes at least one stage of mist elimination having a first filter that removes particles greater than 9 microns. A fan is coupled to the demister to assist gas flow through the mixing chamber.

Abstract: A process of removing contaminants and concentrating wastewater includes delivering wastewater from a source of wastewater to a hydrogen sulfide removal device, mixing an oxidant with the filtered wastewater in the hydrogen sulfide removal device to produce a hydrogen sulfide lean effluent, delivering the hydrogen sulfide lean effluent to a direct contact concentrator, and evaporating a portion of the hydrogen lean effluent in the direct contact evaporator to produce a slurry and an exhaust gas.

Abstract: A harmful substance removal system and method include a direct contact liquid concentrator having a gas inlet, a gas outlet, a mixing chamber disposed between the gas inlet and the gas outlet, and a liquid inlet for importing liquid into the mixing chamber. Gas and liquid mixing in the are mixed chamber and a portion of the liquid is vaporized. A demister is disposed downstream of the mixing chamber. The demister includes at least one stage of mist elimination having a first filter that removes particles greater than 9 microns. A fan is coupled to the demister to assist gas flow through the mixing chamber.

Abstract: A process of removing contaminants and concentrating wastewater includes delivering wastewater from a source of wastewater to a hydrogen sulfide removal device, mixing an oxidant with the filtered wastewater in the hydrogen sulfide removal device to produce a hydrogen sulfide lean effluent, delivering the hydrogen sulfide lean effluent to a direct contact concentrator. and evaporating a portion of the hydrogen lean effluent in the direct contact evaporator to produce a slurry and an exhaust gas.

Abstract: The disclosure relates generally to liquid concentrators, and more specifically to compact, portable, cost-effective wastewater concentrators that can be easily connected to and use sources of waste heat. The concentrators can be used to concentrate liquid wastewater streams including waste metals such as selenium. The liquid wastewater and heated gas for concentration of the same can be obtained from an air quality control system (AQCS) process for cleaning/discharging of flue gas from an electrical power generation unit (EGU). Resulting cementitious solid waste products formed from the concentrated liquid wastewater provide a stable solid matrix that limits, reduces, or prevents leaching of metals such as selenium from the solid waste products into the environment.