摘要：

基于异养反硝化原理,在序批式间歇反应器(SBR)中对反硝化同时降解苯酚的菌种进行了149d的驯化,驯化通过逐步提高进水中苯酚和NO₃^--N的浓度进行。驯化结束后,进水苯酚质量浓度达到360mg/L,葡萄糖质量浓度达到100mg/L,NO₃^--N质量浓度达到240mg/L,水力停留时间6h,苯酚和NO₃^--N去除率均大于98%。反应器运行结果表明:进水苯酚质量浓度低于720mg/L时,SBR反应器运行稳定;高浓度NO₂^--N(>60mg/L)可以严重影响微生物对苯酚以及NO^{3--N的去除能力,同时反应器中20.5%～23.5%的COD可被用于微生物的细胞合成。}

关键词: 序批式间歇反应器, 反硝化, 苯酚, NO₃^--N, NO₂^--N；

Abstract:

Based on heterotrophic denitrification,simultaneous denitrification and phenol degradation has been developed in a sequencing batch reactor(SBR) for 149 d by increasing the concentrations of influent phenol and NO₃^--N in step. At the end of domestication,concentrations of influent phenol,glucose and NO₃^--N are 360mg/L,100 mg/L and 240 mg/L,respectively. When the reactor is operated at HRT 6 h, above 98% of phenol and NO₃^--N could be removed. It has been revealed that SBR could operate steadily even when phenol concentration is less than 720 mg/L. Highly concentrated NO₂^--N has effect on the rejecting ability of phenol and NO₃^--N,when its concentration is more than 60 mg/L. When SBR is operated steadily,20.5%-23.5% of COD could be used for the proliferation of microorganism(biomass).

Key words: sequencing batch reactor, denitrification, phenol, NO₃^--N, NO₂-^- N

中图分类号: 

• X703