聚氨酯海绵载体填充率对MBBR脱氮的影响

发布时间：2018-12-28 21:19

【摘要】：生物膜载体填充率是影响移动床生物膜反应器(MBBR)性能的关键因素。采用聚氨酯海绵作为生物膜载体,分析了不同填充率下MBBR工艺同步硝化反硝化(SND)的脱氮性能,以及生物膜载体上生物量的变化特征。试验结果表明,当填充率分别为10%、20%和30%时,对TOC和NH_4~+-N的去除效果无显著差别,去除率分别均在93%和95%以上,但填充率为20%的略高,并且3种填充率条件下对TN的去除率分别为(77.2±7.4)%、(85.5±9.3)%以及(86.7±9.9)%,SND效率分别为(85.5±8.7)%、(91.3±9.4)%和(93.3±10.2)%。可见,脱氮率随填充率的增加而增大,但20%和30%填充率时没有明显差异。而对于载体上生物量生长来说,填充率为20%时单位质量海绵上的生物量最高。综合考虑,以聚氨酯海绵为生物膜载体的MBBR反应器最佳填充率为20%。
[Abstract]:The filling rate of biofilm carrier is a key factor affecting the (MBBR) performance of moving bed biofilm reactor. Polyurethane sponge was used as biofilm carrier to analyze the denitrification performance of simultaneous nitrification and denitrification (SND) and the change characteristics of biomass on biofilm carrier under different filling rates of MBBR. The results showed that when the filling rate was 10% and 30%, the removal efficiency of TOC and NH_4~ N was not significantly different, the removal rates were above 93% and 95% respectively, but the filling rate was slightly higher than 20%. The removal rate of TN was (77.2 卤7.4)%, (85.5 卤9.3)% and (86.7 卤9.9)%, and the efficiency of SND was (85.5 卤8.7)%. (91.3 卤9.4)% and (93.3 卤10.2)%. It can be seen that the nitrogen removal rate increases with the increase of filling ratio, but there is no significant difference between 20% and 30% filling ratio. For biomass growth on the carrier, the biomass on the sponge per unit weight was the highest when the filling ratio was 20. The optimum filling ratio of MBBR reactor with polyurethane sponge as biofilm carrier is 20%.
【作者单位】：天津城建大学环境与市政工程学院;天津市水质科学与技术重点实验室;省部共建分离膜与膜过程国家重点实验室;
【基金】：天津市科委特派员项目(16JCTPJC51200) 国家自然科学基金资助项目(51378338) 天津市科技计划项目(16YFXTSF00390)
【分类号】：X703

【相似文献】