Wastewater Treatment

Boardman
East Parkside Drive, Boardman Oh

The Boardman Treatment Facility has a design capacity of treating 5 million gallons of waste water per day. The service area that flows to the Boardman Plant includes portions of Beaver, Boardman, and Canfield Townships. The majority of the wastewater is transported by gravity through miles of sanitary sewers. Isolated portions of the service area require sanitary lift stations to pump the waste water to high elevations to begin the gravity flow to the plant. The Boardman Treatment Facility utilizes the conventual method of treatment, whereas the waste water travels through a series of primary settling tanks, aeration basins with chlorine for disinfection, and clarifiers, and all by gravity. Discharge effluent quality limitations are set by the Ohio EPA and compliance is mandatory.

Meander
State Route 46 , Meander Township Oh

The Meander Treatment Facility has a design capacity of treating 4 million gallons of waste water per day. The service area that flows to the Meander Plant includes the City of Canfield, and portions of Austintown, Canfield, North Jackson, and Weathersfield Townships. Much like the Boardman service area, the majority of the waste water is transported by gravity through miles of sanitary sewers. Isolated portions of the service area require sanitary lift stations to pump the waste water to high elevations to begin the gravity flow to the plant. The Meander Treatment Facility utilizes a nonconventional method of treatment whereas during the construction of the Meander treatment plant funding for new and innovative technology was utilized. The plant uses oxygen in the treatment process and clarifiers to separate the solids from the raw waste water. The technology at the plant has the capability of manufacturing oxygen on-site to be used in the treatment processes. Also ozonation is utilized for disinfection in addition to filtration. Discharge effluent quality limitations are set by the Ohio EPA and compliance is mandatory.

Craig Beach /
Lake Milton Facility

The Craig Beach Wastewater Treatment Facility treats sewage with a process called an ORBAL system. The plant design flow rating is 1.0 MGD (million gallons per day). This type of process can be expected to achieve pollution removal rates of 94% in terms of Biochemical Oxygen Demand and Suspended Solids. The plant also is capable of reducing the ammonia-nitrogen levels.

The wastewater enters the plant through a 18 inch gravity sewer and first goes through mechanical bar screens and grit removal which takes out objects that could interfere with treatment or damage equipment. The flow is then directed to the biological process (ORBAL) for treatment to remove pollutants.

The biological treatment process at this facility consists of three concentric endless channels where aeration is provided by a 4 sets of rotating discs spaced periodically around the channels. The discs are located at the surface of the wastewater to provide for the transfer of air into the wastewater. The wastewater passes through all three channels and then is discharged to the center island where it flows to the final clarifiers. There are two clarifiers which are equipped with sludge removal equipment that return some sludge back to the process and the rest to the sludge holding tanks for disposal.

The treated wastewater is then sent to the chlorine contact tank for disinfection and then to the Mahoning River downstream of the Lake Milton Dam.

The plant waste product or sludge is dewatered and hauled to an approved landfill.

New Middletown
Facility

The New Middletown Wastewater Treatment Facility uses a sequencing batch reactor treatment process to treat domestic sewage. The plant design flow rating is .55 MGD (million gallons per day). This type of process can be expected to achieve pollution removal rates of 94% in terms of Biochemical Oxygen Demand and Suspended Solids. The plant also is capable of reducing the ammonia-nitrogen levels to below 1 part per million (mg/l).

The wastewater entering the plant goes through a mechanical bar screen that removes large objects , plastics and other objects which could interfere with treatment and then is pumped to the biological treatment process. A surge tank is also provided that equalizes the flow to the plant processes during heavy rains.

The biological treatment process at this facility is a sequencing batch reactor which performs various treatment processes in one tank (the reactor). The process accomplishes this in four steps or cycles. The REACT cycle is the first step where the wastewater is mixed with activated sludge and aerated. The SETTLE cycle is next where all activity is stopped and the mixture is allowed to settle and separate. The DECANT cycle allows the clear water from the top of the tank to be drawn off and sent for disinfection and the last step is the IDLE mode and is used while other tanks are being filled.

The effluent is then disinfected with ultraviolet light and then discharged to the stream.

The plant waste product or sludge is dewatered and hauled to an approved landfill.