Development of Combined Chemical and Biological Reactor for Nitrogen Removal

硝化作用受到许多有机物的抑制，也受到氨氮的抑制。本研究开发了一种化学-生物组合式反应器。在反应堆里。抑制化合物的浓度通过活性介质的吸附能力保持在抑制阈值以下，并被生长在介质上的微生物转化。沸石被用作对抗高浓度氨氮的媒介。离子交换和生物硝化机制同时发生。反应器能很好地响应负荷的增加。活性碳被用作对抗抑制性有机化合物的介质。在含有抑制性化合物的废水中仍能保持较高的硝化活性。采用生物活性碳-生物沸石组合反应器处理污泥干化洗涤废水。成功地实现了有机物和氮素的处理效果。提出了运行参数和设计参数，给出了实验数据和数学模型。建立了附着培养基上生物量的测定方法。并提出了硝化抑制有机物的筛选方法，确定对甲酚为洗涤器洗涤废水中的抑制计算。

Nitrification is inhibited by many organic compounds and also by ammonium nitrogen. A combined chemical and biological reactor has been developed in this study. In the reactor. concentrations of inhibitory compounds are maintained below the threshold of inhibition by the absoptive capacity of the active medium and transformed by the microorganisms grown on the medium.Zeolite is used as the midum against high concentration of ammonium nitrogen. Ion-exchange and biological nitrification mechanisms occur concurrently. and the reactor can response successfully to increase of loading. Activated carbon is used as the medium against inhibitory organic compounds. Nitrification activity can be kept high even in wastewater containing inhibitory compounds.The combined biological activated carbon and biological zeolite reactor was applied to treatment of scrubber-washed wastewater from sludge drying process. Successful treatment performance of both organics and nitrogen was accomplished. Operational and design parameters are proposed with the experimental data and mathematical model developed. Determination method of biomass grown on the attached mediums are estabished. And also screening method of the nitttrification-inhibitory organic compounds are proposed, and p-cresol was determined as the inhibitory compuonds contained in the scrubber-washed wastewater.