W P C A Worldwide Pollution Control Association WPCA-Duke Energy FGD Wastewater Treatment Seminar March 7, 2013 Visit our website at www.wpca.info All presentations posted on this website are copyrighted by the Worldwide Pollution Control Association (WPCA). Any unauthorized downloading, attempts to modify or to incorporate into other presentations, link to other websites, or to obtain copies for any other purposes than the training of attendees to WPCA Conferences is expressly prohibited, unless approved in writing by the WPCA or the original presenter. The WPCA does not assume any liability for the accuracy or contents of any materials contained in this library which were presented and/or created by persons who were not employees of the WPCA.
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W P C A
Worldwide Pollution Control Association
WPCA-Duke Energy
FGD Wastewater
Treatment Seminar
March 7, 2013
Visit our website at www.wpca.info
All presentations posted on this website are copyrighted by the Worldwide Pollution
Control Association (WPCA). Any unauthorized downloading, attempts to modify or to
incorporate into other presentations, link to other websites, or to obtain copies for any
other purposes than the training of attendees to WPCA Conferences is expressly
prohibited, unless approved in writing by the WPCA or the original presenter. The
WPCA does not assume any liability for the accuracy or contents of any materials
contained in this library which were presented and/or created by persons who were
not employees of the WPCA.
Protection notice / Copyright notice
Trends & Observations
from a WFGD Effluent
Characterization Study
FGD Wastewater Treatment Seminar March 7, 2013 Duke Energy Corporate Headquarters, Charlotte, NC Stephen E. Winter Siemens Environmental Systems & Services (SESS)
1. Relatively low liquor phase mercury concentrations across SESS fleet 2. Other measurements (ORP & % Hg in solids) suggest ideal partitioning for effective Hg removal 3. Design strategy contribute (I.e. larger recycle tanks & longer retention times)?
Se, As, Cd, V 1. Considerably lower concentrations in WFGD effluent with a FF vs. ESP 2. FF offers reduced load on WWT for key regulatory elements (plus overall solids($) to WWT) 3. Is FF (or an upgraded ESP) part of the solution for MATS + Revised Effluent Guidelines?
Boron 1. No observable trends
Nitrogen 1. No observable trends 2. Possible correlation between N concentration and foaming? Further investigation required
Organics 1. BOD5 (and maybe TOC) not COD corresponds to organics in WFGD effluent
Limestone Quality – Impact on WFGD effluent 1. Can severely disrupt WFGD and WWT with operational problems 2. Can change liquor chemistry significantly (dissolved ions and elements) 3. High levels of inerts can add to solids load to WWT