# Emissions

Control Device:
Dry Cyclone Scrubber, Venturi Quench followed by Impingement Tray Scrubberingement Tray Scrubber, Internal Afterburner Prior to Dry Cyclone


Control Device:
Dry Cyclone Scrubber, Venturi Quench followed by Impingement Tray Scrubber, Internal Afterburner Prior to Dry Cyclone


Control Device:
Venturi scrubber, Multiclone, Tray Tower Scrubber

Notes:
Shared Stack, but only one unit running at a time.


Notes:
The test run-specific flow rates do not directly correspond to the test run results for NOx, CO, and SO2 as these were tested for only part of the time that the test runs for the other pollutants were tested.  Use the average flow for these pollutants (21,833 dscfm).

Calculation Notes:
Concentration information was assumed to  be at standard temp and dry based on calculations done on dscm basis.


Notes:
The test run-specific flow rates do not directly correspond to the test run results for NOx, CO, and SO2 as these were tested for only part of the time that the test runs for the other pollutants were tested.  Use the average flow for these pollutants (22,074 dscfm). Also, use the following sludge feed rate for run 2: 3046 lb/hour.


Notes:
The test run-specific flow rates do not directly correspond to the test run results for NOx, CO, and SO2 as these were tested for only part of the time that the test runs for the other pollutants were tested.  Use the average flow for these pollutants (22,074 dscfm). Also, use the following sludge feed rate for run 3: 3043 lb/hour.


Control Device:
Venturi Pak wet scrubber, FGR, afterburn

Notes:
No appendices.  Update: Appendices received 3/30/10


Control Device:
Acid gas Removal System, Venturi Impingement Tray Scrubber, Wet Electrostatic Precipitator, Regenerative Thermal Oxidizer


Control Device:
Fabric filter baghouse, Wet Electrostatic Precipitator, Wet Scrubber


Control Device:
carbon injection, fabric filter baghouse, venturi scrubber, wet ESP

Notes:
PM filterable = "front half" particulate; includes VOC/HAP


Notes:
O2 is wet basis value (O2 dry basis is 9.35).


Notes:
O2 is wet basis value (O2 dry basis is 10.0).


Notes:
O2 is wet basis value (O2 dry basis is 8.5).


Notes:
Below Reporting Limit, per CARB 429, Section 9.2


Notes:
The test run-specific flow rates do not directly correspond to the test run results for NOx, CO, and SO2 as these were tested for only part of the time that the test runs for the other pollutants were tested.  Use the average flow for these pollutants (22,074 dscfm). Also, use the following sludge feed rate for run 1: 3057 lb/hour.


Calculation Notes:
sum of congener values does not equal sum of 'total dioxins' and 'total furans' - used sum of  'total dioxins' and 'total furans'


Control Device:
Hydro-Sonic Tandem Nozzle Scrubber with a Chevron Type Vane Separator


Control Device:
precooler, wet venturi, impingement tray scrubber

Notes:
unit not specificied, but only one unit tested of two identical units. Assumed Unit 1 for consistency.


Control Device:
quench section, quench venturi, packed bed impingement scrubber, ring jet venturi


Notes:
No appendices or run data. Update: Appendices received 3/30/10


Control Device:
Flue Gas Recirculation, VenturiPak Scrubber, Low NOx burners, zero hearth


Notes:
Did not extract operational data because all values are corrected to 7% O2.


Control Device:
Venturi Scrubber, Wet Electrostatic Precipitator, Tray Scrubber, Granulated Activated Carbon


Notes:
very detailed sludge analysis; Test report indicates that natural gas was fed at 186 lb/hour (69.43? scfm) on 7/26 from 0800-1900.  No data are provided for 7/27.


Notes:
Used sludge feed rate for PM/Metals test conducted on 7/26 from 0800-1019.  Test report did not provide sludge feed rate for only 0801-0901 on 7/26.Test report indicates that natural gas was fed at 186 lb/hour (69.43? scfm) on 7/26 from 0800-1900.  No data are provided for 7/27.


Notes:
Includes "Empc values") (total dioxins=2.33E-08, total furans=3.04E-07, 2,3,7,8,TCDD TEQ=6.27E-09, all mg/dscm); Test report indicates that natural gas was fed at 186 lb/hour (69.43? scfm) on 7/26 from 0800-1900.  No data are provided for 7/27.


Notes:
Test report indicates that natural gas was fed at 186 lb/hour (69.43? scfm) on 7/26 from 0800-1900.  No data are provided for 7/27.


Notes:
O2 is wet basis value (O2 dry basis is 8.7); also H2SO4 mist EPA 8 results.


Notes:
O2 is wet basis value (O2 dry basis is 10.3); also H2SO4 mist EPA 8 results.


Calculation Notes:
O2, temp, h20 not provided for SO2, estimated based on table 1


Notes:
Did not extract all operational data because all values are corrected to 7% O2.


Calculation Notes:
Sum of congener values (same as sum of 'total dioxins' and 'total furans')


Notes:
O2 is wet basis value (O2 dry basis is 8.7); also H2SO4 EPA 8 mist results.


Notes:
O2 is wet basis value (O2 dry basis is 8.0); also H2SO4 EPA 8 mist results.


Notes:
O2 is wet basis value (O2 dry basis is 8.2); also H2SO4 EPA 8 mist results.


Notes:
PM filterable = "front half" particulate; test report includes VOC/HAP test results


Notes:
O2 is wet basis value (O2 dry basis is 10.1); also H2SO4 mist EPA 8 results.


Notes:
PM filterable = "front half" particulate; report includes VOC/HAP


Notes:
Totals extracted from PDF version - not explicit in ERT

Calculation Notes:
Totals assuming detection limit used for non-detects and estimated maximum possible concentration (EMPC) value used for EMPC runs


Control Device:
Regenerative Thermal Oxidizer, Afterburner, Wet Electrostatic Precipitator, Wet Venturi Scrubber Cooler


Control Device:
venturi scrubber, stage sieve tray scrubber, wet ESP, RTO

Notes:
Wayne_Township_NJ-1.pdf - end of file indicates average feed rate between 0.76 and 0.84 dtph. Assumed 0.8 dry tph here.


Notes:
sludge feed rate not provided in ERT. Used average reported in ICR survey.


Control Device:
afterburners, multistage wet scrubber (Von Roil Ring Jet) (quench section, packed bed, multiple venturi)

AuxFuel:
possibly natural gas/gigester gas (check appendix)


Notes:
Below Reporting Limit, per CARB 429, Section 9.2. sludge feed rate not provided in ERT. Used average reported in ICR survey.


Notes:
PM filterable = "front half" particulate; test report includes VOC/HAP


Notes:
Estimated Maximum Potential Concentration. sludge feed rate not provided in ERT. Used average reported in ICR survey.


Notes:
nondetect values; PM filterable = "front half" particulate; report includes VOC/HAP


Notes:
Estimated Maximum Potential Concentrationsludge feed rate not provided in ERT. Used average reported in ICR survey.


Control Device:
venturi scrubber, impingement scrubber, abo


Calculation Notes:
Totals of congeners - not explicit in ERT


# Facility

FacilityName:
City of Edmonds Wastewater Treatment Plant


FacilityName:
City of Flint Wastewater Treatment Plant


FacilityName:
City of Glens Falls Wastewater Treatment Plant


FacilityName:
City of Indianapolis Belmont Advanced WWTF - North


FacilityName:
City of Lynnwood Wastewater Treatment Plant


FacilityName:
Columbus Southerly Wastewater Treatment Plant

OwnerName:
City of Columbus Dept. of Public Utilities


FacilityName:
Delaware County Western Regional Treatment Plt.

OwnerName:
Delaware Cnty. Reg. Water Quality Control Auth.


FacilityName:
Detroit Wastewater Treatment Plant Complex 1


FacilityName:
Detroit Wastewater Treatment Plant Complex 2


FacilityName:
Erie County Southtowns/Sewer District No. 3

OwnerName:
Erie County Dept of Environment and Planning


FacilityName:
Felix C. Davis Wastewater Treatment Plant


FacilityName:
Frank E. Van Lare Wastewater Treatment Plant


FacilityName:
Green Bay Metropolitan Sewerage District

OwnerName:
Green Bay Metropolitan Sewerage District


FacilityName:
Hopewell Regional Wastewater Treatment Fac.


FacilityName:
John M. Asplund Water Pollution Control Facility


FacilityOrUnitNotes:
FB replaced a MH. Other MH was abandoned or no longer permitted.


FacilityOrUnitNotes:
3 new FBs will replace the 6 existing MHs in 2010


FacilityName:
NEORSD Easterly Wastewater Treatment Plant


FacilityName:
NEORSD Southerly Wastewater Treatment Plant


FacilityName:
NEORSD Westerly Wastewater Treatment Plant


FacilityName:
New England Treatment Co. Woonsocket Plant


FacilityName:
Northwest Bergen County Utilities Authority

OwnerName:
Northwest Bergen County Utilities Authority


FacilityName:
Southwest Sewer District # 3 - Bergen Point Wastewater Treatment Plant

FacilityOrUnitNotes:
Listed in previous inventory as "Northwest Bergen Point". NACWA corrected name.


FacilityName:
Northwest Quadrant Wastewater Treatment Plant


FacilityName:
Oneida County Water Pollution Control Plant

OwnerName:
Oneida County Water Pollution Control Plant


FacilityName:
Palo Alto Regional Water Quality Control Plant


FacilityName:
Pequannock, Lincoln Park, and Fairfield Sewerage Authority

OwnerName:
Pequannock, Lincoln Park, and Fairfield Sewerage A


FacilityName:
President Street Water Pollution Control Plant

OwnerName:
City of Savannah Water Quality Control Department


FacilityName:
Puerto Nuevo Regional Wastewater Treatment Plant

OwnerName:
Puerto Rico Aqueduct and Sewer Authority


FacilityName:
Rocky River Regional Wastewater Treatment Plant

OwnerName:
Water and Sewer Authority of Cabarrus County


FacilityName:
Schenectady Water Pollution Control Facility


FacilityName:
Somerset Raritan Valley Sewerage Authority

OwnerName:
Somerset Raritan Valley Sewerage Authority


FacilityName:
Stroubles Creek Wastewater Treatment Plant


OwnerName:
Synagro-New England Treatment Co. New Haven Plant


FacilityName:
Town of Tonawanda Wastewater Treatment Facility


FacilityName:
Upper Moreland-Hatboro Joint Sewer Auth.

OwnerName:
Upper Moreland-Hatboro Joint Sewer Auth.


FacilityName:
West Haven Water Pollution Control Facility


SSmanagement:
Central Contra Costa Sanitary District (CCCSD) has an established source control program that ensures commercial and industrial sewer users comply with federal, regional, state, and CCCSD requirements for wastewater discharge quality.  This includes permitting, inspection, and enforcement of CCCSD-specific local discharge limits for materials, such as mercury, lead, cadmium, and other heavy metals.

TrainingRequiredBy:
Each operator must hold at least a California State Water Resources Control Board Wastewater Treatment Plant Operator Grade III to operate the incinerator.


TrainingRequiredBy:
South Carolina Department of Health and Environmental Control


SSmanagement:
The City of Greensboro Utilizes a very robust Industrial Waste Program to insure compliance with USEPA Standards for industrial sites that are categorical industrial dischargers and SIUs.


PopulationServed:
Approximately 368,000 people and 92,000 households are served by HWPC incinerator facility

NParentEmplyees:
653 (see attached page for additional information)

SSmanagement:
Sewage sludge from the MDC facilities' sewage conveyance system is processed through Preliminary, Primary and Secondary wastewater treatment processes.  The separation of sewage sludge from the Primary, Secondary and Regional Solids Receiving Facility processes are thickened and dewatered prior to Incineration.  Sludge that is delivered to the Regional Solids Receiving Facility must have approval and analytical review by the MDC prior to being delivered to the MDC.


NParentEmplyees:
695 (Metropolitan Council Environmental Services)

SSmanagement:
Primary sludge is gravity-thickened to 6% total solids.
Secondary sludge is dissolved air flotation-thickened to 4% total solids.
The sludges are blended and dewatered in high speed centrifuges to produce an autogenous cake of 28% total solids.

TrainingRequiredBy:
Minnesota Pollution Control Agency (MPCA)


SSmanagement:
Primary sludge is gravity thickened to 5% total solids
Secondary sludge is centrifuge thickened to 5% total solids
Blended sludge is dewatered in high speed centrifuges to 28% TS


OwnerName:
Allegheny County Sanitary Authority (ALCOSAN)

SSmanagement:
Regulate dischargers through Pretreatment Program.


OwnerName:
Upper Blackstone Water Pollution Abatement District

TrainingRequiredBy:
MA Department of Environmental Protection

FacilityOrUnitNotes:
Incinerator EU2 replaced with Incinerator 3. All data corresponds to 1 and 3, not 2.


FacilityName:
Ypsilanti Communities Utilities Authority WWTP

SSmanagement:
YCUA have an Industrial Pre-treatment Program and a Septage Management Program. All significant industrial users in the YCUA wastewater service area are under an individual control mechanism (industrial user permit).  Industries are monitored by sampling the effluent from each significant industrial user facility.


SSmanagement:
We do not take in any outside vendor sludge.


FacilityName:
Albany County Sewer District - North Plant


FacilityName:
Albany County Sewer District - South Plant


FacilityName:
Bellingham Post Point Wastewater Treatment Plant


FacilityName:
Camden County Municipal Utilities Authority

OwnerName:
Camden County Municipal Utilities Authority


FacilityName:
City of Ann Arbor Wastewater Treatment Plant


FacilityName:
City of Auburn Wastewater Treatment Facility


FacilityName:
City of Battle Creek Wastewater Treatment Plant


OwnerName:
City of Cranston Department of Public Works


# Facility: Operator Training

AdditionalPractices:
Standardized checklists for each shift.  Written operator logs.  Computer control with extensive data logging and storage.

TrainingRequiredBy:
Each operator must hold at least a California State Water Resources Control Board Wastewater Treatment Plant Operator Grade III to operate the incinerator.


TrainingRequiredBy:
South Carolina Department of Health and Environmental Control


AdditionalPractices:
ORC ISSUES SOP's -- DAILY INSTRUCTIONS -- ETC. LOG BOOKS AND SHIFT CHANGE COMMUNICATIONS SESSION OCCUR 2X/DAY


AdditionalPractices:
The Control Room Operators follow standard operating procedures for monitoring and operating the incinerator per permit parameters through posted guidelines and SCADA computer alarm set points.

OtherTrainingArea2:
Operator training under guidance of crewleaders and shift supervisors


AdditionalPractices:
Electronic logbook; biweekly supervisor meetings; daily operating strategy

TrainingRequiredBy:
Minnesota Pollution Control Agency (MPCA)


AdditionalPractices:
Log book entries, lead operator meetings, SOPs with revisions as necessary.


AdditionalPractices:
continuous emission monitoring system, compliance assurance monitoring plan, emergency response plan, scada computer system

TrainingRequiredBy:
MA Department of Environmental Protection


AdditionalPractices:
Taking Hourly Reads of all the major components, Making sure the percentage of Sludge Solids is consistent between shifts, Doing Preventive Maintenance (Daily-Weekly-Monthly-Quarterly-Annual) on all the equipments as recommended by the manufacturer.


AdditionalPractices:
Try to maintain consistent hearth temperature profiles, blend old and fresh sludge, and keep feed rate consistent.


# LOOKUP - Control Abbreviations

Abbreviation:
activated carbon injection 
for mercury control


Abbreviation:
activated carbon polishing 
for mercury control


Abbreviation:
venturi pak or ring jet scrubbers (more efficient than vs-imp)


# LOOKUP - Populations by Owner

OwnerName:
Allegheny County Sanitary Authority (ALCOSAN)


OwnerName:
Camden County Municipal Utilities Authority


OwnerName:
City of Columbus Dept. of Public Utilities


OwnerName:
City of Cranston Department of Public Works


OwnerName:
City of Savannah Water Quality Control Department


OwnerName:
Delaware Cnty. Reg. Water Quality Control Auth.


OwnerName:
Erie County Dept of Environment and Planning


OwnerName:
Green Bay Metropolitan Sewerage District


OwnerName:
Synagro-New England Treatment Co. New Haven Plant


OwnerName:
Noonday Creek Wastewater Treatment Plant


OwnerName:
Northwest Bergen County Utilities Authority


OwnerName:
Oneida County Water Pollution Control Plant


OwnerName:
Pequannock, Lincoln Park, and Fairfield Sewerage A


OwnerName:
Puerto Rico Aqueduct and Sewer Authority


OwnerName:
Somerset Raritan Valley Sewerage Authority


OwnerName:
Upper Blackstone Water Pollution Abatement District


OwnerName:
Upper Moreland-Hatboro Joint Sewer Auth.


OwnerName:
Water and Sewer Authority of Cabarrus County


# Unit

ConcatControls:
Flue Gas Recirculation, VenturiPak Scrubber, Low NOx burners, zero hearth

UpgradesControlsDetails:
Added Flue Gas Recirculation system, VenturiPak Wet Scrubber system, two zero hearths, and low NOx natural gas burners

MaterialsSegregated:
Grit and Screening material: Grit removal is performed in the Preliminary process with Pista and cyclone separators.  The screening material is removed in the Preliminary process with mechanical barscreens.

The MDC's Regional Solids Receiving Facility, located on site at Hartford WPCF, uses a Lakeside unit for grit and screening separation of septage that is hauled to the facility.

NonAddOnControlDetails:
A Supervisory Control and Aquisition System (SCADA) is used to operate the incinerator with operator oversight, incinerator and scrubber monthly and annual preventative maintenance, SOP's for permit parameters, temperature and fuel feed guidelines and oxygen minimizing procedures.  Low NOX natural gas burners were added to reduce NOx emissions. Quality control is routinely reviewed and updated by facility management and supervisory staff.

UnitMod:
Installation of Flue Gas Recirculation, VenturiPak Scrubber System with existing impingement trays, two zero hearths and low NOx natural gas burners.

SU-SDprocedure:
Start-up and Shutdowns are performed by the control room operator based on standard written operating procedures.  Start-up procedures outline incinerator temperature increase requirements, sludge fuel feed guidelines, auxiliary equipment start-up and Scrubber System start-up.  Incinerator temperatures are monitored to establish and maintain permit parameters and hourly process readings.  Shutdowns are initiated by stopping sludge fuel feed, rabbling and monitoring the sewage sludge burn out.  Auxiliary fuel burners and equipment are shutdown with final operational readings recorded.


ConcatControls:
Regenerative Thermal Oxidizer, Venturi Scrubber, Wet Electrostatic Precipitator, Flue Gas Recirculation, Tray Tower Scrubber

UpgradesControlsDetails:
venturi scrubber, flue gas recirculation,  tray scrubber, wet electrostatic precipitator ,
regenerative thermal oxidizer

MaterialsSegregated:
grit and screenings removal
industrial pretreatment program

NonAddOnControlDetails:
low nox burners , 
flue gas recirculation
manage burn profile and temperatures
consistent feed quality and quantity
pretreatment program for volatile metals

UnitMod:
flue gas recirculation, tray scrubber , wet electrostatic precipitator, regenerative thermal oxidizer

see attachment

SU-SDprocedure:
for startup  start auxillary burning, ramp up temp 50 deg F /hour, start sludge feed once temp in  combustion zone reaches 1000 deg-F, 36 hours required to achieve normal feed rates

SU-SDdifference:
Sludge feed to the incinerator is stopped, during startup  there are only fuel burning  therefore the emissions  are probably better


CapacityNote:
Original design capacity was 1 dry ton/hour. However, this was later reduced to 0.8 dry tons/ hour.

ConcatControls:
Regenerative Thermal Oxidizer, Afterburner, Wet Electrostatic Precipitator, Wet Venturi Scrubber Cooler

UpgradesControlsDetails:
In 1994, we installed CEMs, SCADA, wet electrostatic precipitator, regenerative thermal oxidizer afterburner, exhaust stack and dual fuel burners on both incinerators.

UnitMod:
No modifications were made other than that provided in question #6.

SU-SDfrequency:
We burn sludge every other week. Hence, we start up one of the two incinerators 26 times per year. Once an incinerator is put into service, it is used for at least a year while repairs are made to the other unit.

SU-SDprocedure:
START UP -Twenty four hours prior to burning sludge, the incinerator is brought up to operating temperature. Two hours prior to burning sludge, the RTO afterburner is brought up to operating temperature.
SHUT DOWN -Just prior to stopping the burn we reduce the sludge feed rate and fuel output. Once the sludge feed is stopped completely, we shut off both burners in hearth #3 and one of the two burners in hearth #5 to burn out without temperatures rising too high.


CapacityNote:
originally 2,167 lbs/hr dry sludge, but currently limited to 1,814 lbs/hr by SCDHEC

ConcatMaterialsBurned:
Sewage Sludge, Natural Gas, Digester Gas

UpgradesControlsDetails:
Multistage wet scrubber system, flue gas recycle system, pneumatic ash handling system, flue gas to air heat exchangers, burner systems, new air pollution control systems and continuous monitoring systems

UnitMod:
Original incinerator constructed in 1972.  In 1996, the incinerator was upgraded during a major plant expansion and upgraded to include multistage wet scrubber system, flue gas recycle system, pneumatic ash handling system, flue gas to air heat exchangers, burner systems, new air pollution control systems and continuous monitoring systems. Approximate project cost was $5,000,000 for both incinerators.

SU-SDfrequency:
Only for routine maintenance, repairs, and inspections.

SU-SDprocedure:
During start up and shut down, monitor the following:  Burn temperature, flue gas temperature, heat exchanger in/out temperature, scrubber temperature, draft in inches of water column, control device operation.


CapacityNote:
originally 2,167 lbs/hr dry sludge, but currently limited to 1,689 lbs/hr by SCDHEC


ConcatControls:
Hydro-Sonic Tandem Nozzle Scrubber with a Chevron Type Vane Separator

NonAddOnControlDetails:
SCADA control system interlocks were incorporated and added into the control system design to prevent the system from being operated outside of it's design parameters. Sludge Feed Interlocks:  If bed temperature exceeds 1550 DegF sludge feed will stop automatically.If stack oxygen drops below 2% for > 2mins. sludge feed will stop automatically. If scrubber differential pressure drops below 50" water column, sludge feed stops. Fluidizing Air Blower Interlocks:If any of the quencher or scrubber system water flows fall below their low-end setpoint the fluidizing air blower will shut down automatically. Bed Oil Injection Pump Interlocks:If bed temp exceeds 1575 DegF fuel pump will shut down automatically.If incinerator exhaust temp exceeds 1600 DegF, fuel pump will shut down.If stack oxygen drops below 2% for > 2mins. fuel pump will stop automatically.

SU-SDprocedure:
TOO LENGTHY TO LIST IN THIS FORMAT -- ALL PROCEDURES ARE DOCUMENTED AND AVAILABLE IN SOP FORMAT FOR ALL OPERATORS

SU-SDdifference:
CONTROLLED SHUTDOWN IS OF LITTLE INFLUENCE ON EMISSIONS -- SIMPLY WAIT FOR COMBUSTION TO CEASE AND THEN BEGIN COOLDOWN SOPs

START-UP IS GENERALLY MINIMAL EMISSIONS COMING SOLEY FROM BURNER EMISSIONS TO HEAT FBI TO CHARGING TEMPS. TYPICALLY VERY MINUTE LOADS TO SCRUBBER AND ULTIMATELY EMISSIONS TO STACK DISCHARGE


ConcatControls:
Fabric filter baghouse, Wet Electrostatic Precipitator, Wet Scrubber

UpgradesControlsDetails:
Modifications to mitigate erosion of ducting and equipment in the air pollution control trains, Reduced FBR bed temperatures to reduce NOx emissions (2006) with ammonia injection backup, Reduced FBR bed temperatures to reduce Hg emissions (2006), Enhanced mercury removal controlled study to determine optimum carbon injection rate (2007), Baghouse fabric filter bag replacement (2007)

MaterialsSegregated:
Grit is removed from plant influent sewage prior to primary treatment (about 12 tons per day landfilled).
Screenings are also removed from plant influent sewage prior to primary treatment (about 3 tons per day landfilled).
Scum (fats and grease) are collected and mixed with the sludge for combustion.

HeatRecoveryUse:
building heat; electricity gen to heat combust air

NonAddOnControlDetails:
Daily maintenance checks; monthly ash removal efficiency checks; annual inspections and replacement of defective bags.

Increased packed tower water flows for improved flue gas subcooling (2009). 

Bed temperature control using freeboard quench sprays and upstream dewatering adjsutments to avoid high combustion temperatures that lead to higher mercury and NOx emissions.

Annual Maintenance of fluid bed reactors and air pollution equipment as per O & M Plan.

UnitMod:
Reinforcement of boiler and heat exchanger tubes with coatings and inserts to better withstand ash erosion.
Modification of filter bag length for increased service life in baghouses.
Addition of media in wet scrubber packed media for improved subcooling.

SU-SDprocedure:
Start-up: controlled heatup rate by temperature monitoring
Shutdown: cooldown with combustion and ID fans operating. 
Proper tagout / lockout procedures to safely perform maintenance activities after cooldown.

SU-SDdifference:
Startup - Oxygen slowly decreases as combustion is established; opacity, CO and NOx emission rates are not significantly impacted.
Shutdown- Flue gas oxygen slowly increases as combustion stops; opacity, CO and NOx emission rates are not significantly impacted


ConcatMaterialsBurned:
Sewage Sludge, Spent activated carbon and scum, Unspecified Fuel

UpgradesControlsDetails:
1992-1994; rebuilt multiple hearth furnace hearths, installed new afterburners, replaced venturi scrubber and subcooler.
2006; installed new doubled-bladed bypass damper

NonAddOnControlDetails:
Afterburner - annual tune ups of burners, good combustion practices

Venturi Scrubbers - annual inspection and preventive maintenance of dP transmitter and calibration of damper.

UnitMod:
Re-sizing afterburners reduced greenhouse gas emissions through reduced natural gas use.

SU-SDprocedure:
Start up - monitor temperature and ash system
Shutdown - burn out carefully before opening stack cap.


ConcatControls:
Venturi scrubber, Multiclone, Tray Tower Scrubber

Manufacturer:
Nichols Engineering & Research Corporation

ModelNumber:
Multi-Fueled FB-96-100 Fluid Bed Combustion System

TotalBurnedUnits:
Tons (dry sludge plus 570,000 gallons fuel oil)

HeatRecoveryUse:
heat combust air, boiler for heat and electricity

SU-SDprocedure:
Procedures are followed at cold start up, at hot slump, and at shut down. No detail about procedures was provided.


CapacityNote:
6930 pounds of dry sewage sludge per hour on a 24 hour average

ConcatControls:
Venturi Scrubber, Wet Electrostatic Precipitator, Tray Scrubber, Granulated Activated Carbon

MaterialsSegregated:
Wastewater Treatment Plant has screenings and grit removal at headworks building. These waste streams are landfilled.  The grit chambers, primary clarifiers, and secondary clarifiers have scum (floatables) removal systems. The scum is sent to the WWTP Scum Concentrator Building and put into a gondola and trucked to a landfill.

NonAddOnControlDetails:
Standard Operating Procedure developed for the operation of all the equipment related to the Fluid Bed Sewage Sludge Incinerator. Interlocks are in the Incinerator Control Program to shut down the feed and the incinerator, if there is any instance of violating the YCUA Air Permit #68-02.

SU-SDfrequency:
Start Up - Once a day
Shut Down - Once per day
Approximately 245 days per year

SU-SDprocedure:
Start Up with low Sludge Feed watching the Oxygen in the Combustion Chamber. 
Shut Down after all the Sludge is burned and by increasing the Sand Bed Temperature to 1600 F

SU-SDdifference:
At start-up the dewatered sludge that was stored in the sludge supply piping has generated natural gas. The natural gas decrease the oxygen concentration as it is combusted.

SU-SDtestdetail:
We have a SCADA System that continuously record the oxygen concentration exiting the combustion chamber.


CapacityNote:
27 million Btu/hour of auxiliary fuel (landfill gas or natural gas)

ConcatControls:
Dry Cyclone Scrubber, Venturi Quench followed by Impingement Tray Scrubberingement Tray Scrubber, Internal Afterburner Prior to Dry Cyclone

ConcatMaterialsBurned:
Skimmings, Dewatered Primary and Secondary Sewage Sludge, Landfill Gas, Natural Gas

ModelNumber:
Rotary Multiple-Hearth Furnace, 11 Hearths

UpgradesControlsDetails:
Upgrade from mainframe computer process control to distributed programmable logic controllers (PLC) based control system, Added 3 additional combustion air ports to increase combustion efficiency,  Added ability to use landfill gas or natural gas.

HeatRecoveryUse:
drives aeration blower for secondary process

NonAddOnControlDetails:
Auxiliary fuel burners are tuned once a year to optimize fuel use and minimize emissions of CO and NOx.
2.  Top hearth is used as afterburner for organics destruction.  Temperature operated above 1,000 degrees Fahrenheit.  Sludge is fed to hearth below afterburner hearth.

SU-SDfrequency:
Each furnace unit will have one startup and one shutdown every other year.

SU-SDprocedure:
Unit ID 1 has been on-line one year.  Unit ID 2 is slowly heated over seven  days to prevent refractory cracking.  Then sewage sludge is slowly added to Unit 2 for another seven days to produce ash bed on each hearth.  Once Unit ID 2 is fully on-line, sludge feed to Unit ID 1 is shut off, but auxiliary fuel remains on for three to four days to combust any residual solids.


ConcatControls:
On-hearth Afterburner, Flue Gas Recirculation, Venturi Impingement Tray Scrubber


ConcatControls:
Venturi Impingement Tray Scrubber, Wet Electrostatic Precipitator, Regenerative Thermal Oxidizer


ConcatControls:
Cyclone Seperator- Venturi Scrubber, Backed Bed Tower Scrubber


ConcatControls:
On-hearth Afterburner, Venturi Impingement Tray Scrubber


ConcatControls:
Venturi Scrubber, Wet Electrostatic Precipitator, Regenerative Thermal Oxidizer


ConcatControls:
Acid gas Removal System, Venturi Impingement Tray Scrubber, Wet Electrostatic Precipitator, Regenerative Thermal Oxidizer


ConcatControls:
Detached Afterburner, Venturi Impingement Tray Scrubber


ConcatControls:
Detached Afterburner, Impingement Tray Scrubber


ConcatControls:
Horizontal Gas Scrubber, Impingement Tray Scrubber


ConcatControls:
Detached Afterburner, Venturi Impingement Tray Scrubber, Wet Electrostatic Precipitator


ConcatControls:
Venturi Impingement Tray Scrubber, Wet Electrostatic Precipitator


ConcatControls:
On-hearth Afterburner, Impingement Tray Scrubber


ConcatControls:
On-hearth Afterburner, Impingement Tray Scrubber, Wet Electrostatic Precipitator


ConcatControls:
Venturi Scrubber, Wet Electrostatic Precipitator


ConcatControls:
Cyclone Seperator- Venturi Pak or Ring Jet Scrubber


ConcatControls:
Venturi Impingement Tray Scrubber, Regenerative Thermal Oxidizer


ConcatControls:
Wet Scrubber, Venturi Impingement Tray Scrubber


ConcatControls:
Wet Scrubber, Venturi Scrubber, Backed Bed Scrubber, Venturi Pak or Ring Jet Scrubber


ConcatControls:
Venturi Pak or Ring Jet Scrubber, Wet Electrostatic Precipitator


# Unit: Controls: ESP

ESPOtherConditions:
WESP  VOLTAGE and amps
SPARK RATE 10 -60 SPARK/MIN


ESPOtherConditions:
117 electrodes in 10" collection tubes in precipitator. Secondary voltage 20 - 60 kV


# Unit: Controls: Fabric Filter

BagCleaning:
pulse jet sequential based on pressure drop


# Unit: Controls: General

ControlModelNumber:
Multiple Hearth Incinerator Serial #47174 and Project #S-6061

ControlNote:
Annual cost unknown. Total capital cost of all controls is $5,000,000. Divided by 4 to get rough individual cost.


ControlNote:
total annual cost of all controls is $820,537. Divided by 5 to get rough individual cost.


ControlNote:
Annual cost unknown. Total capital cost of all controls is $1,528984.


ControlNote:
Annual cost for all controls for all units = $4,000,000. Divided by 9 for rough individual cost estimate.


ControlType:
Hydro-Sonic Tandem Nozzle Scrubber with a Chevron Type Vane Separator

ControlNote:
Capital cost included in Incinerator bid in 1996. O&M costs are very minimal for this device.  Do not have any annual cost's calculated for this.


ControlNote:
Other control methods include maintaining consistent sludge feed rate and maintaining hearth temperature profile


ControlNote:
Assumed reported capital cost ($2638000) and annual cost ($10,000) were for both venturi scrubbers.


ControlManufacturer:
North American Pollution Control Systems


ControlNote:
Regenerative thermal oxidizer afterburner is downstream of incinerator exhaust. RTO Unit has three chambers which cycle every 60 seconds from exhaust, to purge, to inlet modes. This allows preheated exhaust chamber media to be used as the intake chamber.


ControlNote:
Assumed reported capital cost ($116,575) and annual cost ($5,000) were for both multiclones.


ControlNote:
capital cost unknown. Assumed annual cost ($10,000) was for both scrubbers.


ControlType:
Venturi Quench followed by Impingement Tray Scrubber (PM Control)


ControlType:
Internal Afterburner Prior to Dry Cyclone


ControlModelNumber:
Multiple Hearth Incinerator Serial #47173 and Project #S-6061


# Unit: Controls: Scrubber

ScrubberSource:
We use plant effluent water (45 mg/l max. TSS) or we can supplement flow with potable water.


AvgOutletTemp(F):
Venturi: 120 deg F; Tray Tower: 70 deg F


ScrubberSource:
The VenturiPak Scrubber System uses facility effluent water with a total solids content of approximately 10 mg/l Total Suspended Solids.


ScrubberSource:
Plant Tray: Plant water 400 MG/L Total Solids
Venturi: Plant water 400 MG/L Total Solids


ScrubberSource:
Facility uses screened non-potable flushing plant water for normal operation and potable city water for emergency backup to protect the internal components.


WaterFlow(gpm):
Ventuir = 300 gpm                 Impingement = 350 gpm

AvgOutletTemp(F):
Venturi = 82 F,         Impingement = 82 F

ScrubberSource:
The source of water for the venturi scrubber and the impingement scrubber is wastewater treatment plant (WWTP) effluent .  The WWTP effluent is high quality tertiary treated wastewater.  The total solids content of the WWTP effluent is 0.059 %, or 0.6 mg/kg.


ScrubbingMedium:
stainless steel packing contacted with plant effluent water

pH:
5.5 - 6.0 (650 gpm recirculated water with caustic addition for absorber)

WaterFlow(gpm):
950 gpm (150 gpm to quench; 650 gpm to packed tower; 150 gpm to venturi)

ScrubberSource:
Plant effluent water at pH of 7.0; TSS under 5 mg/l and total solids of 850 mg/l.


ScrubbingMedium:
3-stage (4.5' total) impingement tray 316L SS

PressureDrop:
17" w.c. across venturi 2" dp aftercooler

ScrubberSource:
Scrubber water source in strained plant effluent water at 3 mg/l TSS and 800 mg/l TDS


WaterFlow(gpm):
Approximately 800 gpm per stage (3 stage system)

AvgOutletTemp(F):
Medusa 172° F, 1st Elbair 142°F, 2nd Elbair 100° F

ScrubberSource:
Final effluent water, total suspended solids - approximately 10 mg/L.


OtherScrubberType:
Hydro-Sonic Tandem Nozzle Scrubber with a Chevron Type Vane Separator

WaterFlow(gpm):
635 GPM @ 15 PSI  for quench tower/1st stage venturi 175 gpm/2nd stage 105 gpm

AvgOutletTemp(F):
Avg. temp. exiting quencher 133 DegF / Avg. stack temp. 98 DegF

ScrubberSource:
Scrubber water is treated plant effluent.  Average TSS is 7.6 mg/L


# Unit: Heat Recovery Details

HeatRecModelNumber:
Tag #1102311-0401(Primary Heat Exchanger) & 1102311-0401 (Sec. Heat Exchanger)

HeatRecoveryNote:
Tube Side ( 2.8 psig) & Shell Side (Primary - 6.5 psig & Secondary 0.43 psig) Total: 9.7 psig


HeatRecManufacturer:
Alstom (Waste heat Boilers and Heat exchangers)

HeatRecoveryNote:
Energy Needs Met: Building space heating - 92%; 
Electricity generation - 8%Avg=50%


HeatRecManufacturer:
American Schack Co. Inc. Heat Recovery Systems


HeatRecoveryNote:
process heat: 100%
space heat: 95%
steam: 100%
electricity generation 5%Avg = 75%


# Unit: Materials Burned

MaterialBurned:
Dewatered Primary and Secondary Sewage Sludge

MaterialSource:
In 2007, 15,353 dry tons sewage sludge generated on site


MaterialSource:
In 2008, 15,227 dry tons sewage sludge generated on site


MaterialSource:
Sewage sludge is generated at MDC's four treatment facilities (East Hartford, Rocky Hill and Poquonock) and burned at Hartford WPCF. 5,655 DT/Year  The Hartford WPCF is also a Regional Solids Receiving facility  7,219 DT/Year. Attached is of list of towns that deliver wastewater treatment solids and/or sewage cake material to Hartford WPCF.


MaterialSource:
Fy 09 11553  tons onsite    3229 tons offsite  see attachment


MaterialSource:
Solid waste created during the treatment of wastewater from homes and businesses in the service area. Material is generated at the facility


MaterialSource:
All sludges generated on site from and dewatered through Humboldt high speed centrifuges.


MaterialSource:
On-site sludge generation - 234 dry tons per day
Sludge generated from three other MCES wastewater treatment plants - 6 dry tons per day


MaterialSource:
sludge from Greensboro's two wastewater treatment facilities


MaterialSource:
Sewage sludge is generated on-site. In 2008, we burned 1,595.4 dry tons in incinerator #1. 
Incinerator #2 was out of service the entire year.


MaterialDescription:
Sludge from municipal wastewater treatment plant

MaterialSource:
On-site wastewater treatment - 17 dry tons (85%) of sludge per day to incinerator.


MaterialSource:
In 2008, 70,580 decatherms of landfill gas from adjacent landfill


MaterialSource:
In 2007, 49,383 decatherms of landfill gas from adjacent landfill


MaterialSource:
In 2008, 26,078 decatherms of pipeline-quality natural gas


MaterialSource:
In 2007, 52,208 decatherms of pipeline-quality natural gas


MaterialDescription:
Fats, Oils, Grease -Surface  Primary Sed. Tank

MaterialSource:
In 2008, 760 dry tons skimmings generated on site.


MaterialSource:
In 2007, 770 dry tons skimmings generated on site.


MaterialDescription:
Gas to keep temperature in the operating range


MaterialSource:
generated in plant form carbon towers and fats and greases


MaterialSource:
Strictly for heating the bed to operating temps -- once burner process temps are achieved the process is autogenous 90% of the operating time.


# Unit: Previously Tested Pollutants

TestDuration:
Criterion Pollutants - 3 runs of 30 minutes.  PM and Metals - 3 runs of 2 hours each

Other:
Copper, zinc

Opacity using on-line CEMS.


TestDuration:
Criterion Pollutants - 3 runs of 30 minutes each.  PM and Metals - 3 runs of 2 hours each


TestDuration:
Three 2-hour test runs for metals and three one hour tests for THC


TestDuration:
3 runs  metals  60 min /run   others 120 min/run


Other:
Zinc, Sulfuric Acid, Magnesium,
Total Gaseous Organics (TGO)


Other:
Test methods used are indicated in attached test reports.


Other:
Test reports submitted as attachment-test method used as indicated in test reports.


Other:
The stack test results were converted into a pdf. file and e-mailed in three (3) parts on 12/4/09 to hambrick.amy@epa.gov.


TestDuration:
Four hour Dioxins/Furans, three 2-hour test runs for metals and three one hour tests for


