生活污水对成熟厌氧氨氧化颗粒污泥的影响

发布时间：2018-05-01 03:28

本文选题：生活污水 + 厌氧氨氧化　；参考：《化工学报》2017年05期

【摘要】：部分短程硝化和厌氧氨氧化技术的研究主要集中在高氨氮废水方面,对低氨氮浓度生活污水的研究相对较少。使经过除碳和部分短程硝化后的实际生活污水进入厌氧氨氧化UASB反应器,探究生活污水对成熟厌氧氨氧化颗粒污泥的影响。结果表明,当厌氧氨氧化UASB反应器的进水由配水变为生活污水后,反应器出水中氨氮浓度可降到5 mg·L~(-1)以下,亚硝态氮浓度可降到1 mg·L~(-1)以下,但是硝态氮的生成量高于理论值,可能是溶解氧被带入UASB反应器使硝化作用增强。UASB反应器内厌氧氨氧化污泥颜色由红色变为红黑色,T-EPS含量减少,PN/PS由1.13增大到3.66,沉降性变好,反应器内污泥中厌氧氨氧化菌Candidatus Brocadia所占比例由17.7%减少为14.4%,系统内AOB和NOB菌的含量增加,如果能够降低进入UASB反应器的溶解氧,有可能会减少出水硝氮,达到较好总氮去除效果。
[Abstract]:Some studies on short-cut nitrification and anaerobic ammonia oxidation are mainly focused on high ammonia nitrogen wastewater, but less on domestic wastewater with low ammonia concentration. The actual domestic sewage after decarbonization and partial nitrification was introduced into the anaerobic ammonia oxidation (UASB) reactor, and the effect of domestic sewage on the mature anaerobic ammonia oxidized granular sludge was investigated. The results showed that when the influent of the anaerobic ammonia oxidation UASB reactor changed from water distribution to domestic sewage, the concentration of ammonia nitrogen in the effluent of the reactor could be reduced to less than 5 mg / L ~ (-1), and the concentration of nitrite could be reduced to less than 1 mg / L ~ (-1), but the yield of nitrate nitrogen was higher than the theoretical value. It may be that dissolved oxygen was brought into the UASB reactor to enhance nitrification. The color of anaerobic ammonia oxidized sludge in the UASB reactor changed from red to red and the content of T-EPS decreased from 1.13 to 3.66. The proportion of anaerobic ammonia-oxidizing bacteria (Candidatus Brocadia) in the sludge was reduced from 17.7% to 14.4.The content of AOB and NOB bacteria in the system increased. If the dissolved oxygen entering UASB reactor can be reduced, the nitrate nitrogen in effluent may be reduced and the removal effect of total nitrogen can be achieved.
【作者单位】：国家工程实验室北京工业大学北京市水质科学与水环境恢复工程重点实验室;哈尔滨工业大学城市水资源与水环境国家重点实验室;
【基金】：国家自然科学基金项目(51478013) 北京市教委资助项目~~
【分类号】：X799.3

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