Posted: May 22nd, 2023

BNR systems designed to remove phosphorus

BNR systems designed to remove phosphorus should have an anaerobic zone that is free of dissolved nitrate and oxygen. In most cases, sand or some other kind of media filtration is used as a polishing step towards the removal of particulate matter when minimal concentrations of total nitrogen and phosphorus are required. Filtration of san can be combined with attached growth denitrification filters to make a further reduction of soluble nitrates and effluent nitrogen levels (WEF and ASCE/EWRI, 2006).Proper operation and control of BNR systems is essential if they are to achieve the desired impact with regard to low nitrogen and phosphorus effluent concentration. Temperature, pH, recycle loads, dissolved oxygen and filamentous have been shown to affect the system’s performance thus, the need to clearly understand how these factors affect the system before hand. Nitrification and denitrification rates are directly proportional to temperature. If there is an increase in temperature, the rates of nitrification and denitrification will also rise. The effect of temperature on phosphorus removal has not been articulately comprehended but, slow phosphorus removal reaction rates are realized in temperatures beyond 30 degrees centigrade

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