College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China.
College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China.
Bioresour Technol. 2017 Feb;226:73-79. doi: 10.1016/j.biortech.2016.12.014. Epub 2016 Dec 5.
A ratio control strategy was implemented in a continuous moving bed biofilm reactor (MBBR) to investigate the response to different temperatures. The control strategy was designed to maintain a constant ratio between dissolved oxygen (DO) and total ammonia nitrogen (TAN) concentrations. The results revealed that a stable nitritation in a biofilm reactor could be achieved via ratio control, which compensated the negative influence of low temperatures by stronger oxygen-limiting conditions. Even with a temperature as low as 6°C, stable nitritation could be achieved when the controlling ratio did not exceed 0.17. Oxygen-limiting conditions in the biofilm reactor were determined by the DO/TAN concentrations ratio, instead of the mere DO concentration. This ratio control strategy allowed the achievement of stable nitritation without complete wash-out of NOB from the reactor. Through the ratio control strategy full nitritation of sidestream wastewater was allowed; however, for mainstream wastewater, only partial nitritation was recommended.
采用一种比值控制策略在连续移动床生物膜反应器（MBBR）中进行研究，以考察其对不同温度的响应。该控制策略旨在保持溶解氧（DO）和总氨氮（TAN）浓度之间的恒定比值。结果表明，通过比值控制可以实现生物膜反应器中的稳定亚硝化，从而通过更强的氧限制条件来补偿低温的负面影响。即使温度低至 6°C，当控制比值不超过 0.17 时，仍可实现稳定的亚硝化。生物膜反应器中的氧限制条件由 DO/TAN 浓度比值决定，而不仅仅是 DO 浓度。这种比值控制策略可以在不将 NOB 从反应器中完全冲洗掉的情况下实现稳定的亚硝化。通过该比值控制策略，实现了侧流废水的完全亚硝化；然而，对于主流废水，仅推荐部分亚硝化。
