Comparison of Start-up Control of Nitrogen Removal via Nitrite in SBRs for Swine Wastewater Treatment at Low Temperature
The accumulation of nitrite at low temperatures for swine wastewater treatment was investigated, and the effects of two start-up methods (aeration control and flee ammonia (FA) inhibition control strategy) on nitrite accumulation and operation of the short-cut nitrogen removal process were compared.Both reactors were started at 25℃C and operated for 65 days, after which the temperature was gradually decreased from 20℃ to 12℃.The stable ratio of NO2-N/ (NO2-N+NO3-N) was kept at 77.8% and 80.4% with the aeration control strategy and with FA inhibition control strategy at 12℃ for 3 months, respectively.Even though both strategies produced the same nitrite accumulation, Ammonia oxidation bacteria (AOB) population and population dynamics differed under the two control strategies.Species tolerant of high ammonia concentrations such as N.eutropha were obtained trader the different control strategies, while species adapted to low ammonia concentrations were removed.The abundance of total bacteria increased in both reactors by analysis of sequencing of 16s rRNA clones, and at low temperature, psychrophiles were present in both reactors.
AOB nitrite swine wastewater low temperature SBR
Meixue Chen Detao Qin Rong Qi Tao Yu Min Yang Yuansong Wei
State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China
国际会议
浙江嘉兴
英文
148-156
2013-10-24（万方平台首次上网日期，不代表论文的发表时间）