Department of Water Engineering and Science, College of Civil Engineering, Hunan University, Changsha, Hunan 410082, China.
College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China.
Bioresour Technol. 2015 Aug;190:76-81. doi: 10.1016/j.biortech.2015.04.063. Epub 2015 Apr 22.
Batch nitrification tests were conducted with sludge and wastewater streams obtained from field implementations to evaluate nitrification inhibition and efficiency of a nitrifiers bioaugmentation technology at full-scale municipal wastewater treatment plants (WWTPs). The results showed that the substrate organic carbon and pH of wastewater streams were inhibitory factors to nitrification and the low pH was the cause of the WWTP experiencing poor nitrification. An ammonia-nitrogen removal rate of 0.21mg-N/gMLVSS-h was observed at pH 6.5, while the rate increased to 0.54mg-N/gMLVSS-h with an introduction of 6% bioaugmented nitrifiers, indicating that the integrated side-stream nitrifiers bioaugmentation process was beneficial in improving nitrification efficiency, even under low pH conditions not conducive to nitrification. The study provides new insights into effective upgrading of municipal WWTPs exposed to poor nitrification.
采用取自现场实施的污泥和废水进行批量硝化试验，以评估硝化抑制剂和硝化菌生物增强技术在大型城市污水处理厂（WWTP）中的硝化抑制和效率。结果表明，废水基质有机碳和 pH 值是硝化的抑制因素，低 pH 值是 WWTP 硝化不良的原因。在 pH 值为 6.5 时，观察到氨氮去除率为 0.21mg-N/gMLVSS-h，而引入 6%的生物增强硝化菌后，该速率增加到 0.54mg-N/gMLVSS-h，表明集成的侧流硝化菌生物增强过程有利于提高硝化效率，即使在不利于硝化的低 pH 值条件下也是如此。该研究为改善面临硝化不良的城市 WWTP 提供了新的见解。
