The Kelair-Blivet NR™ (Nutrient Removal) is a stand-alone, all-in-one, packaged sewage-treatment plant utilising the same technology as the standard Kelair-Blivet but with an additional integrated de-nitrification module. Chemical phosphorous reduction is an add-on option.
Additional tertiary treatments such as effluent disinfection and fine media filtration are available as options. The Kelair-Blivet NR™ may be placed above ground or buried to deck level.
The treatment plant layout is based on the well established Modified Ludzck Ettinger (MLE) process. The process includes the addition of an anoxic zone, followed by an aerobic zone. Additional rotor length is provided within the treatment plant to provide for the conversion of ammonia to nitrate (nitrification) and an internal recycle within the treatment plant back to the anoxic zone to provide for the conversion of nitrate to nitrogen gas (de-nitrification). The removal of BOD is catered for within the aeration zone.
The Kelair-Blivet™ NR includes the option of biological nitrification and denitrification while still maintaining the advantages of the “All-in-one Packaged Sewage-Treatment Plant Design.” Phosphorus removal can also be partly catered for by biological removal and with the addition of chemical dosing for more stringent discharge requirements .