A control strategy of partial nitritation in a fixed bed bioflim reactor

作者：Liang Zhiwei; Han Zhiying^*; Yang Shangyuan; Liang Xinqiang; Du Ping; Liu Guofang; Yang Yue

来源：Bioresource Technology, 2011, 102(2): 710-715.

DOI：10.1016/j.biortech.2010.08.054

• Partial nitritation
• Fixed bed biofilm reactor
• Stability
• Hydraulic retention time (HRT)
• Influent bicarbonate/ammonium molar ratio

To achieve an appropriate mixture of ammonium and nitrite for anaerobic ammonium oxidation (ANAM-MOX), 50% partial nitritation was optimized in a fixed bed biofilm reactor treating synthetic wastewater. Results suggested that 50% partial nitritation could be achieved by stepwise increases of influent NH(4)(+)-N at pH of 7.8 +/- 0.2, temperature of 30 +/- 1 degrees C and dissolved oxygen (DO) of 0.5-0.8 mg l(-1). Hydraulic retention time (HRT) and influent alkalinity did significantly affect partial nitritation. At HRT 12 h, 50% partial nitritation could be kept stable, regardless of influent NH(4)(+)-N variation, by controlling the influent HCO(3)(-)/NH(4)(+) molar ratio at 1:1. The fluorescent in situ hybridization (FISH) results indicated the abundance of evolution of ammonia-oxidizing bacteria (AOB) and the nitrite-oxidizing bacteria (NOB) coincided well with the performance of partial nitritation. Furthermore, the AOB were highly affiliated with Nitrosomonas spp. and Nitrosospira spp. dominated (64.1%) in the biofilm with a compact structure during the stable 50% partial nitritation period.

• 出版日期2011-1
• 单位浙江大学