WQ0017791_Performance Annual Report_20200824

Public Utilities
City of Goldsboro
Water Reclamation Facility
Performance Annual Deport
July 2019 to June 2020
RECEIVEDINCDEQIDWR
AUG 2 4 2020
Non -Discharge
Permiding Unit

4.)erforwance Annual Deport
Table of Contents
General Information ------------------ -------------- -------------------------- 2
Description of Wastewater Treatment Process ------------------------- 3
Performance------------------------------------------------------------------- 6
Notification-------------------------- -------------------------------- ---------- 7
Certification------------------------------------------------------------------- S

Performance Annual Report
General Information:
Date: July 2019 to June 2020
Facility/System Name:
Cite of Goldsboro Water Reclamation Facilit v
Responsible Entity:
Michael Wawner/ Public Utilities Director
Operator in Responsible Charge/Contact:
Robert Sherman/Superintendent
Applicable Permits:
NC0023949
W00017791

Performance Annual Report
Description of City of Goldsboro Water Reclamation Facility: (Outfall 001)
Wastewater is routed through the mechanical filter screen at the Westbrook Road Pnmp Station.
Large solids in the flow are caught on the screen, and are automatically raked off into a screw
conveyor. The conveyor dewaters the solids as they are discharged into a dumpster adjacent to the
structure. The solids are hauled from the pump station on a regular basis for disposal at the
landfill.
Wastewater is pumped to the treatment plant from Westbrook Road Pump Station and is
discharged into the Influent Structure. The influent flow is measured through a Parshall flume
with flow rate indicated on the local instrument panel. The flow rate signal is transmitted to the
SCADA system in the WRF Operations Building.
In case of high influent flows, part or all of the influent flow can be diverted from the Influent
Structure and be diverted to Equalization Pond No.1 for temporary storage. Opening the
equalization gate allows control of the amount of flow temporarily diverted to the equalization
pond. Once influent flows return to normal, stored wastewater is returned to the Influent
Structure by operation of the Equalization Pond Pumps.
A concrete diverter separates the influent flow from the Parshall flume and the influent weirs
equally into two grit chambers. The grit chambers are aerated, creating a turbulence that keeps
organic matter in suspension while allowing heavier inorganic matter to settle to the bottom of the
tank. The heavier solids (sand, coffee grounds, cinders etc.) are pumped by airlift to Equalization
Pond # 1 for disposal. The removal of grit helps reduce wear on downstream process units caused
byy the abrasive nature of the material removed.
The wastewater then flows through four smaller Parshall flumes, which evenly separates the flow
to the four Aerator/Clarifier Splitter Boxes, located adjacent to the Aeration/ Clarifier Basins.
Depending on which particular process is being utilized, fiberglass stop plates in the
Aeration/Clarifier Basin/Clarifier Splitter Boxes are used to split the flow and discharge into three
different areas of the Aeration Basin. These areas are designated as Main Channel Aeration Zone,
Main Channel Anoxic Zone, and BPR Chambers. These areas are controlled to create Aerobic,
Anoxic, or Anaerobic environments.
A diffused air system is utilized for transferring oxygen to the wastewater. Networks of
membrane diffusers are installed within the main aeration channeL When air is diffused through
the network, millions of tiny air bubbles rise to the surface and transfer oxygen to contents of the
tank.

Performance Annual Report
The Biological Phosphorus Removal (BPR) process was developed to remove phosphorus through
modifying environmental conditions in biological treatment systems. BPR is accomplished by
exposing organisms in the system to control anaerobic, anoxic, and aerobic conditions in a manner
that enhances growth of the types of organisms capable of storing large amounts of phosphorus in
their cells. Subsequent removal of those cells from the wastewater also removes the stored
phosphorus and can produce low concentrations of that element in the wastewater, without
resorting to chemical treatment.
The Biological Nitrogen Removal process also takes place in the Aeration basins. This process
works hand in hand with the Biological Phosphorus Removal process. This is accomplished by
exposing the organisms to aerobic and anoxic conditions in the Aeration basins, which promotes
Nitrification and Denitrification, which in turn removes the Nitrogen from the wastewater.
The Aeration basins discharge to a Clarifier influent control box and then from the control box to
the center of the Clarifier basin. As the wastewater flows toward the Clarifier effluent weirs, the
solids in the flow settle to the bottom of the tank. The Clarifier liquid flows over the effluent weirs
for discharge to the Effluent Control Box. The settled sludge is removed from the Clarifiers by
hydraulic differential created by RAS Pump Station. A portion of the activated sludge is returned
to the aeration basins and the remaining portion is removed from the system as waste activated
sludge (WAS). WAS is wasted to a one million gallon (MG) Biosolids Storage Tank prior to
dewatering and composting the dewatered biosolids with chipped vegetative waste creating a
"Class A Exceptional Quality" compost.
The Clarifier wastewater flows to the Traveling Bridge Sand Filter from the Clarifier Effluent.
The Sand Filter is a continuous rapid -rate down flow gravity filter. This type of sand media filter
enhances solids removal, reduces turbidity, removes chemical precipitate, reduces toxic chemicals
and reduces BOD, COD, and TOC related to suspended solids. The influent floods the filter bed
via the multiple inlet ports from the influent channel. The influent flows downward through the
granular media and porous plates. Filtrate passes through the effluenttbackwash port and into the
channel. A traveling bridge contains and supports the backwash hood, which moves across the
filter bed and automatically backwashes each cell while the remaining cells continue filtering the
influent.
The filter effluent bypasses the existing chlorine contact chamber and is disinfected with
ultraviolet light. ( Sodium Hypochlorite and Sodium Bisulfite are used as an emergency back-up
for disinfection and dechlorination if ever the ultra -violate light system fails). The disinfected
effluent then passes through a Parshall flume and a cascade step aerator, then it is discharged by
gravity to the Neuse River at Pipe 001. An effluent flood pump station pumps to the Neuse River
during high plant and river flow conditions.
4

Performance Annual Repor.,
Reclaimed Water and Constructed Wetlands (Outfal1002 )
The City of Goldsboro operates a water reclamation facility for treating wastewater with a permit
to discharge treated effluent directly to the Neuse River. In an effort to reduce the amount of
nutrients discharged to the river, the City has initiated projects fording alternate uses for the
highly treated effluent from the WRF.
A Reclaimed Water (non -potable) Pump Station pumps reclaimed water for three separate uses;
for wash water on the belt filter presses in the Dewatering Building, for irrigation purposes, and to
the constructed wetlands. After the reclaimed water is used to clean belt filter press, it is returned
to the head of the plant for more treatment. Some of the reclaimed water is pumped to an off -site
storage tank for irrigation of the city's golf course and to 114-acres of farmlands producing hay.
There is also a portion of reclaimed water that is sent to 40-acres of constructed wetlands for
further "polishing" treatment through a series of cells containing aquatic plants. The effluent
from the constructed wetlands is discharged back to the river at Pipe 002. All reclaimed water
receives ultraviolet light disinfection and chlorine for disinfection. The constructed wetlands
effluent is de -chlorinated with Sodium Bisulfate prior to discharge.
Wastewater Pum Stations
The City has twenty-six (26) wastewater pump stations to pump wastewater collected by gravity
sewer lines throughout the City of Goldsboro to the Water Reclamation Facility for treatment.
These pump stations consist of motors, pumps, and pump controls. When wet wells begin to fill
with wastewater, the pump controls turn the pumps on to move the wastewater towards the Water
Reclamation Facility. All city pump stations are monitored from the Water Reclamation Facility
by a telemetry system or by dialer system.

Perfrorma.ace Annual Deport
Performance: (July 1, 2019 to June 30, 2020)
Pipe 001 (WRF)
Pine 002 (Constructed Wetlands)
Reclaimed Wastewater
Utilization System
July 2019 Compliant
July 2019 Compliant
July 2019 Compliant
August 2019 Compliant
August 2019 Compliant
August 2019 Compliant
September 2019 Compliant
September 2019 Compliant
September 2019 Compliant
October 2019 Compliant
October 2019 Compliant
October 2019 Compliant
November 2019 Compliant
November 2019 Compliant
November 2019 Compliant
December 2019 Compliant
December 2019 Compliant
December 209 Compliant
January 2020 Compliant
January 2020 Compliant
January 2020 Compliant
February 2020 Compliant
February 2020 Compliant
February 2020 Compliant
March 2020 Compliant
March 2020 Compliant
March 2020 Compliant
April 2020 Compliant
April 2020 Compliant
April 2020 Compliant
May 2020 Compliant
May 2020 Compliant
May 2020 Compliant
June 2020 Compliant
June 2020 Compliant
June 2020 Noncompliant
Reclaimed Wastewater
June 2020
Non-Compliant-TSS Daily Maximum Limit -June 23 TSS 20mg1l, June 26 TSS 13mg1l (Limit 10) During the 24 hour
periods on these dates, the plant processed 17.74mgd and 15.05mgd respectively. Equalization ponds were used until they
reached maximum capacity and during this time the Neuse River was reaching minor flood stage. There were settling issues
due to the high flows and it caused the TSS to increase. Monthly TSS Limit was in compliance. Please note during the time
of spraying the Turbidity did not exceed 3.67 NTUs on June 23 and during the time of spraying the Turbidity did not exceed
2.78 NTUs on June 26.

J erformance annual Report
Notification:
The Performance Annual Report for the Water Reclamation Facility along with the Performance
Annual Report for the Collection System will be made available to the public at the Public Works
Complex office and at the City of Goldsboro Water Reclamation Facility. The City is notifying
citizens of the availability of these Performance Annual Reports by sending a printed message on
the water bills. In addition, the Performance Annual Report is available on the City website.

Performance Annual Report
Certification:
I certify under penalty of law that this report is complete and accurate to the best of my
knowledge. I further certify that this report has been made available to the users or customers of
tt amed system and that those users have been notified of its availability.
il.l. 1. ZMA j 0, f f, t j L, 1 7?� ono
obert AlLerman Date
Responsible Person in Charge
Superintendent
City of Goldsboro Water Reclamation Facility