Abstract: The present invention relates to a method and system for monitoring and controlling the process train of ozonation and biologically aerated filtration used in water and wastewater treatment. The process monitoring and control can be achieved by online measurement of UV/Vis absorption at one or multiple wavelengths and oxidation/reduction potential values which are compared to predetermined UV absorption and oxidation/reduction values. The air and ozone dosage of the effluent are then adjusted based on the measured values of UV/Vis absorption and oxidation/reduction potential of the effluent.

Abstract: The present invention relates to a method and system for monitoring and controlling the process train of ozonation and biologically aerated filtration used in water and wastewater treatment. The process monitoring and control can be achieved by online measurement of UV/Vis absorption at one or multiple wavelengths and oxidation/reduction potential values which are compared to predetermined UV absorption and oxidation/reduction values. The air and ozone dosage of the effluent are then adjusted based on the measured values of UV/Vis absorption and oxidation/reduction potential of the effluent.

Abstract: A dual parallel underdrain lateral for use in a filtration system having a filtration media includes a primary conduit extending along the underdrain lateral, which has a plurality of metering orifices for providing gas and liquid thereby; a secondary conduit, where the secondary conduit has a plurality of dispersion apertures in an upper side thereof to deliver the gas and liquid from the secondary conduit to the filtration media; and at least one gas conduit extending along the underdrain lateral, where the at least one gas conduit is connected to a gas source and is configured to provide the gas from the gas source directly to the primary conduit, or the secondary conduit, or any combination thereof.

Abstract: A method and system for removing nitrogen from a downflow denitrification media filter which optimizes the bump timing increasing productivity. The method comprises measuring the influent and effluent nitrate concentrations and determining total nitrate-nitrogen accumulation. A bump of the filter is initiated based on a comparison of the total nitrate-nitrogen accumulation with a predetermined accumulated nitrate-nitrogen value. The method may utilize a processor, having a memory, which is capable of communicating with, receiving input from and sending output to, and controlling the filter and any in-line measurement tools. The method may include a bump timing factor to adjust the bump interval when the actual operating conditions are substantially different from the operating conditions that were present when the predetermined accumulated nitrate-nitrogen value was determined. A method for predicting the bump interval and determination of an estimated time until the next bump are also included.