Development of Combined Chemical and Biological Reactor for Nitrogen Removal

硝化作用被许多有机化合物和铵态氮抑制。本研究开发了一种化学生物组合反应器。在反应堆里。通过活性培养基的吸附能力和生长在培养基上的微生物的转化，抑制化合物的浓度保持在抑制阈值以下。沸石被用作对抗高浓度铵态氮的中间体。离子交换和生物硝化机制同时发生。并且反应器能够成功地响应负载的增加。活性炭用作抑制性有机化合物的介质。采用生物活性炭-生物沸石组合反应器处理污泥干化洗涤废水，研究了生物活性炭-生物沸石组合反应器对污泥干化洗涤废水的处理效果。有机物和氮的成功处理性能完成。提出了操作和设计参数的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。提出了硝化抑制有机物的筛选方法，确定了对甲酚为洗涤废水中的硝化抑制有机物。

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.