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Wastewater Treatment

The Town of Forest City, North Carolina began a comprehensive wastewater treatment program with the construction of the Riverside Drive Water Reclamation Facility in 1959. Operations began in 1960 with improvements in 1983, 1988, 1991 and 1997. Design capacity is 4.95 million gallons per day (MGD),current flow is 1.25 MGD.

View the 2019 System Performance Annual Report

FOREST CITY WASTEWATER TREATMENT/ WRF

NC0025984 Wastewater Treatment Plant located at 397 Riverside Dr. in

Forest City is a 4.95 MGD plant consisting of the following units:

Waste Water Treatment Plant 2017 — Forest City WWTP March 2017

Influent mechanical step/bar screen and manual bypass screen.
Aerated traveling bridge grit chamber and grease removal.
5 smaller first stage aeration tanks with floating aerators (none in service at this time due to flow decrease)
Second stage aeration basin with floating aerators (4.0 MGD Capacity)
Dual secondary clarifiers (75ft diameter)
Chlorine contact chamber and step aeration.
Chlorine gas feed equipment.
Sulfur Dioxide gas feed equipment for dechlorination.
Large Aerobic Digester with diffused air system (approximately 0.450 MG capacity.
Small Aerobic Digester with 60hp floating aerator (approximately 0.230 MG capacity.
(2) Waste pumps approximately 500 gpm each direct to digester, and 150 gpm to thickener.
1 meter Envirex gravity belt thickener.
Enviroquip 2.0 meter belt filter press (14% - 17% solids.)
Sludge storage building for Class B cake land application.
Average flow is approximately 1.25 MGD.

ENVIRONMENTAL QUALITY

The citizens of Forest City can be proud of the high standards and excellent environmental record of this facility. The Town is committed to protect the environment and provide this essential service in a cost effective and safe manner.

DESIGN INFORMATION

Design capacity:	4.95 MGD
Current flow (discharge):	1.25 MGD
Effluent BOD:	10 mg/L daily average
Septage receiving station:	10,000 gal. Capacity
Biosolids annual production:	185 dry metric tons
Biosolids building storage capacity:	Approximately 800 cubic yards
Biosolids storage time:	Undetermined
Population served:	8,500 domestic customers 5 major industries
Biosolids are distributed by Southern Soil Builders operating under permit No. WQ0037135

RIVERSTONE WASTEWATER TREATMENT PLANT

NC0087084 Wastewater Treatment Plant located at 219 Broad River Blvd. in the Riverstone Industrial Park. The plant is a 0.05 MGD permitted SBR plant consisting of:

Influent mechanical bar screen and manual bypass screen.
Pre-EQ basin with maximum capacity of 0.017 MG.
SBR basin with minimum capacity of 0.043 MG and a maximum capacity of 0.063 MG.
Decant flow rate (average high to low) 313 gpm. Sludge waste rate of 100 gpm.
Post SBR EQ basin maximum volume of 0.0156 MG. Flow control valve feeds chlorine contact chamber at a rate of 0-0.033 MG.

The SBR has a default program for permitted flow rate of 5 cycles/24 hour day:

Mixed-Fill 35 minutes (anoxic condition)
React-Fill 109 minutes (bowers running with floating mixer)
React Phase 35 minutes (influent pumps are locked out)
Settle 45 minutes
Decant 64 minutes
Idle 0-64 minutes (integral with decant)
Sludge Waste 2.26 minutes (integral with decant)

The cycles have programmability built in by PLC. These have been adjusted as needed to accommodate the small flow rate currently received by the plant. Sludge waste is conducted manually as needed and is hauled to the plant headworks of the Forest City WWTP/WRF. The Riverstone WWTP was built in 2003 and began operation in November 2013 with the start up of Hicks Grove Lift Station for American Zinc Products. Influent flow ranges from 0.003 MGD to 0.008 MGD of domestic and permitted industrial flow from industries within the industrial park and adjacent American Zinc Products facility.

Superintendent

Jeff Dotson is the Plant Superintendent. Jeff holds a Grade IV North Carolina Biological Wastewater Certification and has over 28 years wastewater experience.

email: jeffdotson@townofforestcity.com

Chief Wastewater Operator

Sonny Penson holds a Grade IV North Carolina Biological Wastewater Certification and has over 25 years of wastewater experience. Sonny serves as the plant Chief Operator and ORC.

email: sonnypenson@townofforestcity.com