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本研究将生物转盘和平流式沉淀池设计理念相结合,开发出对水中致浊物质、有机组分、氨氮和总磷具有同步去除性能的一体式生物净化-沉淀池,考察了进水水力负荷对其污染物净化性能的影响规律.结果表明,在特定转盘转速和水质条件下,浊度、有机组分和氨氮的平均去除率随水力负荷的增大均呈先相对稳定后下降趋势,浊度和有机组分与氨氮平均去除率分别在0.036 g·(m~2·d)~(-1)与0.064 g·(m~2·d)~(-1)时达到最大.与浊度、有机组分和氨氮不同,水力负荷对总磷的去除效果影响较大,进水水力负荷在0.064 m~3·(m~2·d)~(-1)时,总磷平均去除率最差,适当减小或增大水力负荷,均有助于除磷过程的进行.进一步研究发现,硝化和除磷过程对水相中的有限碳源及溶解氧存在竞争关系.沿水流方向,盘片表面的微生物具有良好的种群配合和沿程分布特点,保证了在不利水力负荷条件下,工艺仍具有一定的去污效果,在微污染水体的强化净化处理中具有一定的应用前景.
In this study, we combined the design concept of biological turntable and flat-flow sedimentation tank to develop an integrated biological purification-sedimentation tank with simultaneous removal of turbidity substances, organic components, ammonia nitrogen and total phosphorus in water, On the purification performance of pollutants.The results showed that the turbidity, the average removal rates of turbidity, organic components and ammonia nitrogen decreased with the increase of hydraulic load at a specific turntable speed and water quality, The average removal rates of organic components and ammonia nitrogen reached the maximum at 0.036 g · m -2 · d -1 and 0.064 g · m -2 · d -1, , Organic components and ammonia nitrogen are different, the hydraulic load has a great effect on the removal of total phosphorus. When the hydraulic loading is 0.064 m 3 · m -2 · d -1, the average removal rate of total phosphorus is the highest Poor, appropriate to reduce or increase the hydraulic load, are conducive to the process of phosphorus removal.Further study found that nitrification and phosphorus removal process in the water phase of the limited carbon source and dissolved oxygen competition exists.With the water flow direction, the disk The surface of the microorganisms with good population distribution and distribution characteristics along the way to ensure that the adverse hydraulic load conditions , The decontamination process still has some effect, has certain application prospect in strengthening purification treatment of slightly polluted water body.