Lagoon Drive Wastewater Treatment Facility
Wastewater for parts of the community of Windsor and the community of Three Mile Plains is delivered to the Lagoon Drive extended aeration wastewater treatment facility through a thirty inch diameter gravity sewer, and discharged into an onsite pumping station. From there it is pumped into Cell #1 where it is exposed, over a 24 day period, to a series of fine bubble aeration diffusers which are powered by two blowers. The wastewater then, over a 21 day period, flows into Cell #2 for further aeration. There is a settling period at the end of Cell #2 before being discharged through the effluent pipe. The primary purpose of aeration is to provide oxygen and contact time which promotes the growth of aerobic bacteria. These bacteria break down organic matter in the wastewater, converting it into carbon dioxide, water, and energy. This process also controls odors and provides internal sludge digestion. It is imperative to maintain proper dissolved oxygen levels throughout both lagoons to maintain this sensitive biological process.The secondary purpose of the system is to uniformly mix the dissolved oxygen into the water. Efficient mixing is critical to ensure that aerobic treatment can occur throughout the lagoon. Once treated the effluent is disinfected using Chlorine Gas and then dechlorinated with Sulphur Dioxide Gas which kills or inactivates any remaining pathogens, making the water safe for discharge into Tregothic Creek.
Wentworth Road Wastewater Treatment Facility
70% of the raw combined wastewater from the community of Windsor finds its way to a large pumping station (PS#7) north of Exit 6 off Highway 101. PS#7 pumps the wastewater to the headworks building located off of Wentworth Rd, and discharges into the mechanical drum screens. The screens remove particles (i.e. screenings) that are larger than the pore size of the screen (200-300 micron). Approximately 60% of the total suspended solid (TSS) and organisms contributing to BOD (biochemical oxygen demand) are captured in this process.The filtered/screened wastewater discharges to the lagoon for biological treatment through aeration. The first cell is aerated and the second is used for settling. After settling the wastewater undergoes UV disinfection. In this step, the water is exposed to ultraviolet light, which kills or inactivates any remaining pathogens, making the water safe for discharge into the St Croix River.The material captured in the screening process will be washed in a washer-compactor. Much of the organics are removed from the screenings and discharged to a sludge tank, which is then pumped to an on site reed bed for decomposition and evapotranspiration. The remaining solids is transferred to a compactor, bagged and sent to the landfill as solid waste.
Falmouth Wastewater Treatment Facility
Servicing the community of Falmouth, this treatment facility utilizes the Return Activated Sludge Process (RAS). Raw sewage is pumped to the sewage treatment facility through a 200mm diameter forcemain.The process begins with grinding and screening, where large debris like sticks, rags, and other solid materials are removed from the wastewater. This step prevents damage to the subsequent treatment equipment and ensures smooth operation. All wastewater passes through a grit chamber where smaller particles are removed before entering the aeration ditch.After screening, the wastewater enters the aeration ditch. Here, air is pumped into the ditch to provide oxygen, which promotes the growth of aerobic bacteria. These bacteria break down organic matter in the wastewater, converting it into carbon dioxide, water, and energy.The aerated wastewater then flows into a clarifier or settling tank. In this tank, the solid particles, including the bacteria from the aeration tank, settle to the bottom, forming sludge. The clarified water, now free of most solids, is collected from the top of the tank and sent to the UV disinfection chamber for disinfection.The settled sludge from the clarifier is partially returned to the aeration tank as return activated sludge (RAS) to maintain the bacterial population. The remaining sludge is sent to a sludge digester. In the digester, anaerobic bacteria break down the organic matter in the sludge, reducing its volume.Finally, the clarified water undergoes UV disinfection. In this step, the water is exposed to ultraviolet light, which kills or inactivates any remaining pathogens, making the water safe for discharge into the environment.
Hantsport Wastewater Treatment Facility
Hantsport residents are serviced by agreement between West Hants Regional Municipality & The Municipality of the County of Kings Click Here