FGD wastewater Articles
-
Ca removal and Mg recovery from flue gas desulfurization (FGD) wastewater by selective precipitation
Selective removal of Ca and recovery of Mg by precipitation from flue gas desulfurization (FGD) wastewater has been investigated. Thermodynamic analysis of four possible additives, Na2CO3, Na2C2O4, NaF and Na2SO4, indicated that both carbonate and oxalate could potentially provide effective separation of Ca via precipitation from Mg in FGD wastewater. However, it was found experimentally that ...
-
Removal of sulfate from wet FGD wastewater by co-precipitation with calcium hydroxide and sodium aluminate
Chemical precipitation method was adopted to remove sulfate from wet flue gas desulfurization (FGD) wastewater and mixtures of Ca(OH)2 (CH) and NaAlO2 (SA) were used as precipitants. The mechanisms of sulfate removal were explored according to the experimental and simulated results. These showed that three kinds of precipitations, which were gypsum, ettringite and co-precipitation onto ...
-
Operating experience on the treatment on fgd scrubber blowdown from existing generating stations
Amendments to the original 1990 Clean Air Act resulted in the initial SO2 control requirements for coalfired power plants in the mid1990’s. These amendments initiated a new phase of installation of Flue Gas Desulfurization (FGD) scrubbers in the United States. The Clean Air Interstate Rules (CAIR), first filed by the EPA in 2004, required that more stringent requirements for SO2 and NOx emission ...
-
A soil column study to evaluate treatment of trace elements from saline industrial wastewater
Industrial wastewater from the flue gas desulfurization (FGD) process is characterized by the presence of trace elements of concern, such as selenium (Se) and boron (B) and relatively high salinity. To simulate treatment that FGD wastewater undergoes during transport through soils in subsurface treatment systems, a column study (140-d duration) was conducted with native Kansas soil and saline ...
-
Simultaneous removal of Ni(II) and fluoride from a real flue gas desulfurization wastewater by electrocoagulation using Fe/C/Al electrode
Large amounts of anions and heavy metals coexist in flue gas desulfurization (FGD) wastewater originating from coal-fired power plants, which cause serious environmental pollution. Electrocoagulation (EC) with Fe/C/Al hybrid electrodes was investigated for the separation of fluoride and nickel ions from a FGD wastewater. The study mainly focused on the technology parameters including anode ...
-
A New Day Dawns
As demand for water increases nationwide and around the globe, tougher restrictions have been placed on several industries to incentivize reuse and repurposing and discourage contaminant discharge. Across the country, regional power companies are turning to outside experts for solutions that meet their competing needs of being environmentally friendly and economically feasible. For example, GE ...
-
Reusing effluent of flue gas desulfurization wastewater treatment process as an economical calcium source for phosphorus removal
Flue gas desulfurization (FGD) wastewater treatment by conventional neutralization, chemical precipitation and coagulation process removes most suspended solids and heavy metals, and provides an effluent rich in calcium, alkalinity and chloride, which obstructs its reclamation and reuse but is in favor of phosphorus (P) precipitation. The goals of this study were to investigate feasibility of ...
-
Pilot-scale demonstration of the hybrid zero-valent iron process for treating flue-gas-desulfurization wastewater: Part II
The hybrid zero-valent-iron (hZVI) process is a novel chemical treatment process that has shown promise for removing heavy metals and nutrients from industrial wastewaters. In this study, a pilot-scale demonstration was conducted to continuously treat 3.8–7.6 L/min (1–2 gpm) of the flue-gas-desulfurization (FGD) wastewater at a coal-fired power plant for 5 months. In this paper, a ...
-
Selenium Measurement at Flue Gas Desulfurization Wastewater Treatment Pilot Plant
The U.S. EPA, under the Clean Water Act, establishes Effluent Limitation Guidelines (ELG). On August 31, 2020 the EPA issued a finalized version to the Stream Electric Power Generating category (40 CFR Part 423). This finalized version added numerical limitations on several pollutants and waste streams. One waste stream of interest is flue gas desulfurization (FGD) wastewater. FGD waste streams ...
-
Industrial Wastewater Treatment
Flue gas desulfurization (FGD) wastewater treatment Flue gas generated from thermal power plants usually requires desulfurization and denitrification, since this wastewater often contains heavy metal ions, COD and other harmful substances. We provide tubular membrane systems and DT/ST high concentration membrane systems to achieve stable quality. Coal chemical wastewater treatment Jiarong ...
-
How Low-Temperature Evaporation Treats FGD Wastewater
Veolia Water Technologies’ low-temperature CoLD crystallizer technology can help coal power plants clean and recover water for reuse from the wastewater produced in wet scrubber systems. The innovative solution provides effective wastewater treatment at lower capital and operational expenses than those of conventional thermal zero liquid discharge options. Despite rising ...
-
Zero discharge system handles german power station’s fgd wastewater
Evaporator/Crystallizer Combined with Salt Exchange Pretreatment is the Answer for this Demonstration Plant. The Facility A major European utility has several power block units fitted with wet limestone FGD scrubbers at their 600 MW power station in southern Germany. The blowdown from the scrubbers is treated to remove the heavy metals and suspended solids. The blowdown is discharged into the ...
-
Pilot-scale demonstration of the hybrid zero-valent iron process for treating flue-gas-desulfurization wastewater: Part I
The hybrid zero-valent-iron (hZVI) process is a novel chemical treatment process that has shown great potential in previous laboratory and field bench-top scale tests for removing selenium, mercury and nutrients from various industrial wastewaters. In this study, a pilot-scale demonstration was conducted to continuously treat 3.8–7.6 L/min (1–2 gpm) of the flue-gas-desulfurization ...
-
Enel power, italy – brindisi project – ZLD plant for FGD wastewater treatment
The Facility The Brindisi Sud Power Plant is equipped with four coalfired units each of 660 Mwe capacities. These units normally fire imported coal with < 1% Sulphur. The flue gases are treated sequentially by SCR-DeNOx with ammonia as reagent, High efficiency ESP to remove fly ash and wet limestone gypsum forced oxidation DeSOx. Each unit is equipped with a 2 x 50% DeSOx lines each with a ...
-
ENEL power, italy – sulcis project – ZLD plant for FGD wastewater treatment
The Facility The Sulcis Power Plant is equipped with 1 x 345 MW fluidized bed boiler and 1 x 240 MW conventional boiler. This coal-fired power plant is located in Sardinia Island and has a total of 585 Mwe capacity. The units normally fire imported coal with < 1% Sulphur. The flue gases are treated sequentially by SCR-DeNOx with ammonia as the reagent. This is followed by a high efficiency ...
-
ENEL power, italy – fusina project – ZLD plant for FGD wastewater treatment
The Facility The Fusina Power Plant is equipped with four coal-fired units with a total capacity of 975 MW capacity (1 x 165 MW + 1 x 170 MW + 2 x 320 MW). The Environmental Refurbishment (Flue Gas Desulpharization, (FGD)) project includes a new DeSOx system for common for units #1 & 2; two DeNOx systems, one each for unit #1 & 2. Units #3 & 4 are already equipped with DeSOx and ...
-
ENEL power, italy – torrevaldaliga project – ZLD plant for FGD wastewater treatment
The Facility The Torrevaldaliga Nord Power Plant is being converted (torn down and rebuilt) to three coalfired units each of 660 Mwe capacity. The plant is equipped with fabric filters for flue gas dust removal, DeNOx system (for flue gas denitrification), FGD systems for sulphur oxides removal. The FGD system is equipped with a common wet limestone milling, three limestonegypsum forced ...
-
ENEL power, italy – la spezia project – ZLD plant for FGD wastewater treatment
The Facility The La Spezia Power Plant is equipped with 1 x 600 MW coal-fired power unit and 2 x 350 MWe gas-fired combined cycle power units for a total of 1300 MWe. The unit normally fires imported coal with < 1% Sulphur. The flue gases are treated sequentially by FGD absorber. It is equipped with a 1 x 100% DeSOx lines with an absorber. The blow down from the absorber, along with other ...
-
Water Sustainability
I7.1 | Water Optimization – 30% Groundwater Use Reduction Tabatha Pellerin, Senior Program Manager, AECOM AECOM assisted the Entergy Lewis Creek gas/coal fired electric power plant with water conservation efforts prompted by a goal of 30% groundwater (GW) use reduction by 2016 mandated by the local GW authority. To complete this work, personnel interviews were conducted to ...
-
Alstom power plant - Wastewater treatment plant for wastewater from flue gas desulfurisation - Case Study
In Portugal's largest coal-fired power plant, flue gas desulphurisation creates wastewater which still contains heavy metals, fluoride and ammonia after the separation of the FGD gypsum. The wastewater is treated with the EnviroChemie physico-chemical Envochem® COL process to maintain compliance with local limit values. The amount of wastewater that must be discharged from the flue gas ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you