A method for removing the contamination of C, N utilizing heterotrophic ammonia-oxidizing bacteria

摘要

An approach that uses heterotrophic ammonia oxidation bacteria (HAOE) in order to remove carbon and nitrogen pollutants in wastewater includes the cultivation of the heterotrophic bacteria in an activated sludge environment and then use of the above bacteria to remove carbon and nitrogen from the wastewater. According to the physiological characteristics of HAOB and the principles of combined oxidation of carbon and nitrogen, the approach is able to achieve simultaneous removal of carbon and nitrogen under the condition that the bacteria do not grow. The process is able to be carried out in the temperature range between 6 - 40°C. No excess sludge is produced in the process. The approach is able to control the process and product composition of aerobic ammonia oxidation through the control of organic carbon source, and is able to realize zero-accumulation of NO3--N in the nitrification process. The approach can fully utilize existing activated sludge systems to remove C and N. Therefore there is no need to build new facilities, and all C and N removal process can be finished in a single reactor.