Flue Gas Desulfurization (FGD) and other efforts to reduce sulfur dioxide (S02)

In 2008, we completed the final stage of a $600 million investment to install FGDs on 3,000 megawatts of coal-fired generation at Killen and Stuart Station power plants.

The FGDs:

  • reduce SO2 emissions
  • help us comply with environmental regulations
  • capture significant mercury emissions (in conjunction with DP&L's existing electrostatic precipitators)
  • create commercial grade gypsum

In 2006, Hutchings Station installed low-nitrogen oxide (NOx) and over-fire air burners on four boilers in addition to using low-sulfur coal.

All of DP&L's efforts have resulted in reducing S02 emissions by 86%.

Selective Catalytic Reduction (SCR)

In 2004, DP&L invested $175 million in SCR equipment to reduce nitrogen oxide (NOx) emissions.

SCR equipment has reduced DP&L's NOx emissions by over 74%.

Electrostatic Precipitators (ESPs)

ESPs remove more than 99% of the fly ash coming from our boilers at these power plants:

  • Hutchings Station
  • Killen Station
  • Stuart Station

Combustion Turbines

The combustion turbines at the Tait and Montpelier Stations use natural gas for fuel.

SO2 and particulate matter emissions are at trace levels.

Dry low-NOx burners or water injection are used to reduce NOx emissions. This technology yields the lowest levels of NOx emissions in the DP&L system.

The combustion turbines use small quantities of well water. There is no withdrawal from or discharge to nearby streams, other than clean storm water flows during rain events.

Water Sampling

We work to protect the Great Miami and Ohio Rivers with frequent sampling. Compliance with Ohio Environmental Protection Agency laws is very important to DP&L.