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Process Description

Flow Through Systems

This system is designed to adjust the effluent pH to meet the required conditions for discharge. The flow-through neutralization system is sized to receive and treat non-metal bearing waste streams. The neutralization tank is sized for approximately 10 to 12 minutes retention time at a continuous flow rate. A mechanical mixer is mounted on a support bridge to ensure a proper homogeneous mixture.

Acid and caustic chemical metering pumps are provided to inject the neutralization reagents. The chemical metering pumps are automatically operated by the controller. Acid and/or caustic is added as needed to maintain the pH level within the designated parameters.

The controller is equipped to display pH, adjust chemical additions and alarm during out-of-specification conditions.

Optional Manual Batch Mode

The option manual batch mode neutralization system fills the neutralization tank manually, no level control is supplied to stop the filling of the tank. Once the pH adjustment is completed, the operator manually opens the pump suction valve and turns the air valve to start the air operated diaphragm pump.

Optional Semi-Automatic Batch Mode

The optional semi-automatic mode system fills the neutralization tank manually, no level control is supplied to stop the filling of the tank. Once the pH adjustment is completed, the operator manually opens the pump suction valve. the operator pushes a button on the panel to start the pump. Once the water level reaches low level, the pump will stop. The low level flowrate is set to leave some water in the tank.

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