Preparation of Polyurethane Immobilized Nitrifying Bacteria Pellets and Application to Treatment of Micro-Polluted Source Water

Abstract:

The preparation and application of polyurethane immobilized nitrifying bacteria pellets for surface water treatment was studied. The removal of ammonia nitrogen from micro-polluted source water by polyurethane immobilized nitrobacteria pellets with a stuffing ratio of 10% in volume in an up-flow inner circulation reactor was investigated with the system operated continuously under the following conditions: temperature 20°C--30°C, DO 3--5 mg/L, and pH 7.1--7.3. The continuous removal rates of NH⁴⁺-N remain above 90% and ⁴⁺-N concentration in the produced water was less than 0.5 mg/L with the hydraulic reaction time (HRT) controlled at 0.5 h. The results verified that polyurethane immobilized nitrobacteria pellets have a great potential for micro-polluted source water treatment applications.

• Periodical: Applied Mechanics and Materials (Volumes 152-154)
• Pages: 480-484
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.152-154.480
• Online since: January 2012
• Authors: Yong Wei Jin, Ya Mei Dong, Zhen Jia Zhang
• Keywords: Immobilized Nitrifying Bacteria Pellets, Micro-Polluted Source Water, Polyurethane (PU), Up-Flow Inner Circulation Reactor

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