Institute of Water Research, University of Granada, C/Ramon y Cajal, 4, 18071, Granada, Spain.
Department of Built Environment, School of Engineering, Aalto University, P.O. Box 15200, Aalto, FI-00076, Espoo, Finland.
Chemosphere. 2019 Jun;225:73-82. doi: 10.1016/j.chemosphere.2019.03.012. Epub 2019 Mar 5.
A lab-scale partial nitritation SBR was operated at 11 °C for 300 days used for the treatment of high-ammonium wastewater, which was inoculated with activated sludge from Rovaniemi WWTP (located in Polar Arctic Circle) in order to evaluate the influence the temperature on the performance, stability and dynamics of its microbial community. The partial nitritation achieved steady-state long-term operation and granulation process was not affected despite the low temperature and high ammonia concentration. The steady conditions were reached after 60 days of operation where the granular biomass was fully-formed and the 50%-50% of ammonium-nitrite effluent was successful achieved. Inoculation with cold adapted inoculum showed to yield bigger, denser granules with faster start-up without necessity of low temperature adaptation period. Next-generation sequences techniques showed that Trichosporonaceae and Xanthomonadaceae were the dominant OTUs in the mature granules. Our study could be useful in the implementation of full-scale partial nitritation reactors in cold regions such as Nordic countries for treating wastewater with high concentration of ammonium.
采用实验室规模的部分亚硝化 SBR 处理高氨氮废水，该 SBR 在 11°C 下运行 300 天，接种自罗瓦涅米 WWTP（位于极地北极圈内）的活性污泥，以评估温度对其微生物群落的性能、稳定性和动态的影响。尽管温度低、氨氮浓度高，但部分亚硝化仍实现了稳定的长期运行和颗粒化过程。经过 60 天的运行后达到稳定状态，此时形成了完全成熟的颗粒生物量，并成功实现了 50%-50%的氨氮-亚硝态氮出水。接种耐寒接种物可获得更大、更密集的颗粒，启动速度更快，无需低温适应期。下一代测序技术表明， Trichosporonaceae 和 Xanthomonadaceae 是成熟颗粒中的优势 OTUs。我们的研究对于在北欧等寒冷地区实施全规模部分亚硝化反应器处理高浓度氨氮废水可能具有重要意义。
