Treatment of flue gas desulfurization blowdown containing heavy metals, suspended solids, and chlorides.
Coal-fired power plant wastewater treatment. Flue gas desulphurisation, ash handling water and cooling tower blowdown.
Cooling water treatment for power plants. Filtration, chemical dosing, side-stream treatment and blowdown management.
Oil and gas wastewater treatment for natural gas combined cycle.
Water and wastewater treatment for power generation water treatment.
Flue gas desulfurization systems generate wastewater containing heavy metals (mercury, arsenic, selenium), suspended solids, high chlorides, and dissolved salts. This challenging effluent requires specialised treatment to meet stringent discharge requirements.
FGD wastewater contains mercury, arsenic, selenium, and other metals requiring precipitation and removal to meet strict discharge limits.
Challenge: < 10 ppb mercury
Chloride concentrations can exceed 10,000 mg/L, requiring corrosion-resistant materials and specialised treatment processes.
Challenge: 5,000-30,000 mg/L Cl
High gypsum and fly ash content creates significant solids loading requiring high-capacity clarification systems.
Challenge: 2-10% solids
High TDS levels from limestone and reaction byproducts require advanced treatment or zero liquid discharge approaches.
Challenge: 30,000+ mg/L TDS
Our FGD treatment systems include metals precipitation with sulphide or hydroxide, solids separation with clarification, and filtration for polishing. Advanced processes like biological selenium removal and membrane systems achieve very low discharge limits.
Flow and load equalization tanks buffer variations in FGD wastewater quality, providing consistent feed to downstream treatment processes.
Benefit: Process stability
Hydroxide and sulphide precipitation removes mercury, arsenic, and other heavy metals to meet stringent discharge requirements.
Removal: 99%+ metals
LAMELLA clarifiers provide high-rate solids separation for precipitated metals and gypsum with minimal footprint.
Efficiency: 95% TSS removal
Multimedia filters and self-cleaning filters provide final polishing for suspended solids removal.
Polishing: < 5 ppm TSS
Biological reduction systems remove selenate and selenite to < 5 ppb, meeting the most stringent discharge limits.
Removal: 99.9% selenium
Screw presses and centrifuges dewater metal-laden sludge for secure landfill disposal.
Cake: 20-25% solids
Integrated FGD treatment achieves 99%+ metals removal and produces effluent meeting strict ELG (Effluent Limitation Guidelines) requirements for power plant wastewater discharge.
Meets all EPA Effluent Limitation Guidelines for power plant wastewater including arsenic, mercury, selenium, and nitrate limits.
Standard: 40 CFR Part 423
Achieves >99% removal of mercury, arsenic, and other heavy metals through optimised precipitation and filtration processes.
Result: < 10 ppb mercury
Advanced membrane and evaporation systems achieve ZLD, eliminating wastewater discharge and maximising water recovery.
Recovery: 95%+ water
Integrated SCADA systems provide real-time monitoring and automated reporting for regulatory compliance documentation.
Feature: Auto-reporting
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