| 不同氮浓度冲击对颗粒污泥脱氮过程中N2 O产生量的影响 |
| 摘要点击 3333 全文点击 1957 投稿时间：2012-04-08 修订日期：2012-05-31 |
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| 中文关键词 N2 O产生量 氮浓度冲击 颗粒污泥 同步硝化反硝化 SBR |
| 英文关键词 N2 O production impact of the nitrogen concentration granular sludge simultaneous nitrification and denitrification (SND) SBR |
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| 中文摘要 |
| 采用好氧-缺氧SBR污水生物处理系统,考察不同进水NH4+-N浓度冲击对同步硝化反硝化型颗粒污泥脱氮过中N2 O的释放规律和脱氮效果的影响. 结果表明,当进水NH4+-N浓度分别从稳定的30 mg·L-1突然提高到40、60和80 mg·L-1时,氨氮去除率从80.04%降至61.40%、39.65%和31.02%,但氨氮的去除量变化不大,都在25 mg·L-1左右; 另外,N2 O产生量受进水NH4+-N冲击较小,在4个不同的进水NH4+-N浓度下,典型周期N2 O产生量分别为3.019、3.489、3.271和3.490 mg·m-3,而且N2 O释放速率都在0.0045 mg·(m3·min)-1左右. 同步硝化反硝化型颗粒污泥系统的好氧阶段和缺氧阶段均有N2 O产生. 不同的NH4+-N浓度冲击下,同步硝化反硝化型颗粒污泥系统对NH4+-N的去除量没有变化,但由于进水NH4+-N浓度的提高引起系统脱氮率显著下降. |
| 英文摘要 |
| The aerobic-anoxic SBR biological wastewater treatment systems were used to examine the impact of different influent NH4+-N concentrations on the release of N2 O and nitrogen removal in the simultaneous nitrification and denitrification of granular sludge. The results showed that when the influent NH4+-N concentration suddenly increased from the stable concentrations of 30 mg·L-1 to 40 mg·L-1,60 mg·L-1 and 80 mg·L-1, the ammonia removal rate decreased from 80.04% to 61.40%,39.65% and 31.02%, respectively, however, the ammonia nitrogen removal amount underwent little change, being about 25 mg·L-1 in all cases; in addition, there was little influence of influent NH4+-N on the N2 O production, under the four different influent NH4+-N concentrations, the N2 O production in a typical cycle was 3.019 mg·m-3, 3.489 mg·m-3, 3.271 mg·m-3, and 3.490 mg·m-3, respectively, and the N2 O emission rates were all around 0.0045 mg·(m3·min)-1. N2 O was produced in both the aerobic stage and anoxic stage of the granular sludge simultaneous nitrification and denitrification system. Under different influent NH4+-N concentrations, the amount of NH4+-N removal by the granular sludge simultaneous nitrification and denitrification system was not changed, but significant decrease in nitrogen removal rate was observed with the increase in the influent NH4+-N concentration. |
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