Fan Yuqin, Tan Xinwei, Huang Yong, Hao Tianwei, Chen Hong, Yi Xue, Li Dapeng, Pan Yang, Li Yong, Kong Zhe
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou 215009, China; Research Center for Environmental Bio-technology, Suzhou University of Science and Technology, Suzhou 215009, China.
Bioresour Technol. 2022 Nov;364:128116. doi: 10.1016/j.biortech.2022.128116. Epub 2022 Oct 13.
A pilot-scale system integrating internal circulation and partial nitritation-anammox successfully treated real high-strength membrane-manufacturing wastewater in this study. With this pilot-scale system, a high chemical oxygen demand (COD) removal efficiency of 85 % and a nitrogen removal of 90 % are achieved at an organic loading rate of 6.0 kg COD/m/d. The nitrogenous organic matters in the internal circulation zone are degraded into ammonia nitrogen. In the partial nitrification zone, nitrite accumulation is achieved, providing a suitable NH-N/NO-N ratio for anammox reaction. Partial nitritation is achieved by maintaining an operational temperature at 30-35 °C, free ammonia concentration at 5-7 mg/L and dissolved oxygen at 0.4-0.7 mg/L with a reflux ratio of 150 %. The COD to nitrogen ratio in the internal circulation effluent is maintained below 3.0 to inhibit nitrite oxidizing bacteria. This study demonstrates that a pilot-scale system can efficiently remove organic matters and nitrogen from wastewater of membrane-manufacturing industry.
本研究中，一个集成了内循环和部分亚硝化-厌氧氨氧化的中试规模系统成功处理了实际的高强度膜制造废水。利用该中试规模系统，在有机负荷率为6.0 kg COD/m³/d的情况下，实现了85%的高化学需氧量（COD）去除效率和90%的氮去除率。内循环区中的含氮有机物被降解为氨氮。在部分亚硝化区，实现了亚硝酸盐积累，为厌氧氨氧化反应提供了合适的NH₄⁺-N/NO₂⁻-N比例。通过将运行温度保持在30-35°C、游离氨浓度保持在5-7 mg/L、溶解氧保持在0.4-0.7 mg/L以及回流比为150%来实现部分亚硝化。内循环流出物中的COD与氮的比例保持在3.0以下，以抑制亚硝酸盐氧化细菌。本研究表明，中试规模系统能够有效地去除膜制造行业废水中的有机物和氮。
