Blue Nite - Biological Denitrification Plant Brochure

Advantages of Blue NITE™ over other technologies: • Low capital and O&M costs • Continuous flow – no interruption for backwash or changing media • Modular design easily handles capacity increases • CA Title 22 accepted • Remove nitrogen and phosphorus simultaneously High levels of nutrients in wastewater can lead to a degradation of water quality by algal growth and dissolved oxygen depletion. For this reason dischargers face increasingly stringent permit limits for discharge of nutrients to receiving waters. Blue NITE™ allows municipalities to meet permit levels for discharge of wastewater by lowering nitrate to less than 3 mg/L N. Blue Water also helps wastewater dischargers by removing both phosphorus and nitrate in the same treatment step. While phosphorus is removed by adsorption, nitrate levels are lowered by the biological denitrification process. Blue Water’s Centra-flo™ Filter line is a well-established gravity sand filtration system with more than 250 installations worldwide. The Blue NITE™ denitrification process is accomplished in a Centra-flo™ continuous backwash, upflow sand filter with a carbon source added to the influent water. In the filter, fixed-film, heterotrophic, denitrifying bacteria convert nitrate to atmospheric nitrogen (N2). A portion of filtrate passes through a sand washer, carrying contaminants and excess bacteria with it. The washer separates solids, which are directed to a reject line. The clean sand then falls by gravity back to the media bed. Nitrogen gas is produced during operation and becomes entrapped by the filter media. This gas is carried down with the sand and is released in the sand washer. Some of the advantages of this method of gas removal are: (i) no false readings of headloss; (ii) the flow of the filter does not need to be reversed; and (iii) the reject stream can be routed back to the head of the plant, adding alkalinity for nitrification. Nitrogen Removal (888) 710-2583, sales@blueh2o.net, www.blueh2o.net For more information, please contact Blue Water: Denitrify to <1 mg/L N Blue NITE™ is currently installed at several locations in the U.S., lowering nitrate levels to <3 mg/L N. In a full-scale demonstration project Blue NITE™ lowered nitrate from 10 mg/L N to <0.3 mg/L N. Concurrently small amounts of nitrite (0.5 mg/L N) and ammonia (0.8 mg/L N) were lowered to <0.015 mg/L N each. Also in the same reactive filter, Blue Water’s Blue PRO® process lowered total phosphorus to <0.150 mg/L P, achieving total nutrient reduction in the same vessel. Blue NITE™ may also be used in series with a second Blue PRO® pass for total phosphorus concentrations <0.020 mg/L P. In projects using alternatives to methanol as the carbon source, Blue NITE™ has been shown to work with Micro-C™ and UniCarb™. This allows plants more choices for operation. Blue NITE™ is able to accommodate high or fluctuating influent nitrate levels. The process applies to wastewater or groundwater applications. Hydraulic loading rates to Blue NITE™ filters are dependent on influent dissolved oxygen (DO) levels. Blue NITE® Results Influent (mg/L) Effluent (mg/L) Nitrate—N 10.6 <0.23 Nitrite—N 0.55 0.015 Ammonia—N 0.82 0.015 Total Phosphorus 3.44 0.143 Blue Water for a Green World™ Blue Water is proud to offer a broad platform of water treatment technologies, from primary wastewater treatment to advanced effluent polishing steps to environmental remediation processes. We strive to meet our customers’ needs cost-effectively, considering both capital expense and ongoing operations and maintenance costs. Additionally, we keep an eye on the future by looking for sustainability in our technologies, including environmentally friendly materials and energy conservation. For more information, please contact Blue Water: (888) 710-2583, sales@blueh2o.net, www.blueh2o.net Blue NITE® Models Flow Rate Footprint Skid systems 5-100 gpm 8’ x 10’ and up CF-50 fiberglass 0.25 MGD 7’ x 7’ CF-50 concrete 0.25 MGD 7’ x 7’ Quad concrete 1 MGD 15’ x 15’ Modular Blue NITE™ systems include the following: 1.4 Blue Water’s Blue NITE™ technology is covered by one or more patents pending. carbon source