Embed Size (px)
Citation preview
CITY OF FITCHBURG, MASSACHUSETTS
Department of Public WorksWastewater Division
Fitchburg’s “Clean Water Department”
REPORT A CONCERNUse the SeeClickFix appto submit non-emergency requests
MISSION STATEMENT The mission of the Fitchburg
Department of Public Works (DPW) Wastewater Division is to convey and treat domestic, commercial, and industrial wastewater to a level that meets or exceeds water quality limits for the Nashua River as set by the U.S. Environmental Protection Agency (US EPA) in the most efficient and cost effective manner possible.
15
2
3
4
1 West WWTF
5 West WWTF/PS6 N Nashua River
2 East WWTF3 Cobbler Drive Pump Station (PS)4 Sawyer Passway PS
City of FitchburgWastewater Treatment Facilities
(WWTFs) and Sewer System
WestminsterLeominster
Ashby
Lunenburg
Ashburnham
Fitchburg
DPW Deputy Commissioner of WastewaterJeffrey A. Murawski, PE
Wastewater Administrations CoordinatorWendy A. Boulay
Superintendent of Treatment OperationsMark D. McNamara
Maintenance EngineerKenneth E. Letourneau
Sewer System ManagerAnthony W. Maressa, PE
DidYou
Know?
The City’s East Plant is a Massachusetts ‘Grade 7’ Rated Treatment Plant and the second largest plant in central Massachusetts. Sewage flow is received from the 40,000+ residents and businesses of Fitchburg, as well as from portions of the towns of Westminster and Lunenburg. Our WWTF can treat up to 12.4 MGD of flow from residential, commercial, and industrial users everyday.
120 Miles of Road
WestStockbridge
Boston
142 Miles of Sewer WestminsterLunenburg
Fitchburg
FITCHBURGMassachusetts
Department of Public WorksWastewater Division301 Broad Street | Fitchburg, MA 01420978-829-1930 | ci.fitchburg.ma.us
TUNE INEvery 3rd Tuesday at 7:40 AM for important updates given by the Deputy Commissioner of Wastewater
FM
K-ZO
NE AM KOMMUTE
WPK
Z
FOLD
AB
C
D
E
G
H
I
JK
L M
N
O
F
Fitchburg residents rely on the DPW – Wastewater Division to protect not only
the community’s health but also the health of the environment.
This tank of sodium hypochlorite, located in the CEPT Building, is used with both disinfection and odor control.
LEGENDA Main Control Building
B Headworks Building and Aerated Grit Tanks
C Primary Settling Tanks (3)
D Parshall Flume Flow Meter and Flow Splitting Box
E 1st Stage Aeration Tanks
F 1st Stage Secondary Clarifier Tanks (2)
G 2nd Stage Aeration Tanks
H 2nd Stage Secondary Clarifier Tanks (2)
I Chlorine Contact Tanks
J Chlorination Building
K CEPT Building
L Solids Holding Tanks (2)
M Sludge Gravity Thickening Tanks (2)
N Blower Building
O Standby Electric Power Generators
Process Flow Diagram of the Easterly Wastewater Treatment Facility
Aerial Site Plan
CITY OF FITCHBURG
DPW – Wastewater Division
The City is required to adhere to federal and state environmental laws and regulations to protect the health of Fitchburg’s residents as well as that of downstream communities, and to protect the health and viability of the environment against wastewater transmitted sources of human-caused pollution.
In Fitchburg, through compliance with the City’s regulatory operating National Pollution Discharge Elimination System (NPDES) permit, the DPW – Wastewater Division is the professional authority charged with this important responsibility.
The oldest sewers in Fitchburg were built in the late 1800s. Wastewater treatment began in the early 1900s, and was replaced with the present day Easterly Wastewater Treatment Plant, built in the early 1970s. The East Plant is located in the southeast corner of the City at 24 Lanides Lane, across the Nashua River from the Fitchburg Municipal Airport.
The East Plant provides preliminary, primary and secondary treatment of the incoming wastewater, and has a rated design treatment capacity of 12.4 million gallons per day (MGD). By plant optimization, the plant is capable of fully treating peak flow capacities of 20 MGD or more, before engaging surplus flow bypassing of secondary treatment.
Treatment removes pollutants including solids, organic matter pollution, nutrients, pathogenic microbes, and toxic metals, preventing adverse impacts to the North Branch of the Nashua River. Treatment also ensures that effluent discharge has enough dissolved oxygen and has a neutral pH (between pH of 6.5 and 8.3). Treatment also disposes of solids residuals in an environmentally responsible manner.
To LandfillSludge
DewateringSludge
Blend TankSludge Holding
Tanks (2)Gravity Belt Thickeners (2)
Waste Activated SludgeWaste Activated Sludge
Return Activated Sludge
Return Activated Sludge
Waste Activated
Sludge
Ferric ChloridePolymer
Ferri
c Chl
orid
e
Aerated Grit Tanks(2)
Mechanical Bar Screens
(2) Primary Settling Tanks (3)
Primary Flow Splitter /
Influent Sample
SeptageMag
nesiu
m
Hydr
oxid
e
Sodium Hypochlorite
Sodium Hypochlorite
Sodium Hypochlorite
Sodium Bisulfite
Primary Effluent Sample
Primary Effluent Flow Meter
Gravity Thickeners (2)
First Stage Aeration(2)
First Stage Clarifier (2)
Biological Selector Zone
SecondaryBypass
BypassFlowmeter
Main Flow Distribution
Structure
Biological Selector Zone
Second Stage Influent
Second Stage Clarifier (2)
Chlorine Contact Tanks Dechlorination Final Sample Effluent
Final EffluentFlow Measurement
Blended Effluent During Bypass
SecondStage
Effluent
Second Stage Aeration (2)
Ferric ChloridePolymer
First Stage Effluent
54” Influent Sewer Polymer
Outfall toN. Nashua River
