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首页> 外文期刊>Journal of environmental sciences >Simultaneous denitrification and denitrifying phosphorus removal in a full-scale anoxic-oxic process without internal recycle treating low strength wastewater
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Simultaneous denitrification and denitrifying phosphorus removal in a full-scale anoxic-oxic process without internal recycle treating low strength wastewater

机译：在不进行内部循环处理低强度废水的全规模缺氧-含氧过程中同时进行反硝化和反硝化除磷

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Performance of a full-scale anoxic-oxic activated sludge treatment plant (4.0 x 10(5) m(3)/day for the first-stage project) was followed during a year. The plant performed well for the removal of carbon, nitrogen and phosphorus in the process of treating domestic wastewater within a temperature range of 10.8 degrees C to 30.5 degrees C. Mass balance calculations indicated that COD utilization mainly occurred in the anoxic phase, accounting for 88.2% of total COD removal. Ammonia nitrogen removal occurred 13.71% in the anoxic zones and 78.77% in the aerobic zones. The contribution of anoxic zones to total nitrogen (TN) removal was 57.41%. Results indicated that nitrogen elimination in the oxic tanks was mainly contributed by simultaneous nitrification and denitrification (SND). The reduction of phosphorus mainly took place in the oxic zones, 61.46% of the total removal. Denitrifying phosphorus removal was achieved biologically by 11.29%. Practical experience proved that adaptability to gradually changing temperature of the microbial populations was important to maintain the plant overall stability. Sudden changes in temperature did not cause paralysis of the system just lower removal efficiency, which could be explained by functional redundancy of microorganisms that may compensate the adverse effects of temperature changes to a certain degree. Anoxic-oxic process without internal recycling has great potential to treat low strength wastewater (i. e., TN < 35 mg/L) as well as reducing operation costs. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
机译：在一年中跟踪了一家大型缺氧-氧化活性污泥处理厂（第一阶段项目为4.0 x 10（5）m（3）/天）的性能。该工厂在10.8摄氏度至30.5摄氏度的温度范围内处理生活废水的过程中，去除碳，氮和磷的性能良好。质量平衡计算表明，COD的利用主要发生在缺氧阶段，占88.2。 COD去除总量的百分比。缺氧区的氨氮去除率为13.71％，好氧区的氨氮去除率为78.77％。缺氧区对总氮（TN）去除的贡献为57.41％。结果表明，氧气罐中的氮消除主要是由同时硝化和反硝化（SND）引起的。磷的还原主要发生在富氧区，占总去除量的61.46％。生物脱氮除磷达到11.29％。实践经验证明，适应微生物种群温度的逐渐变化对于维持植物的整体稳定性很重要。温度的突然变化并没有导致系统的瘫痪，只是去除效率降低，这可以用微生物的功能冗余来解释，这些冗余可以在一定程度上补偿温度变化的不利影响。无需内部循环的缺氧-缺氧工艺具有处理低浓度废水（即TN <35 mg / L）以及降低运营成本的巨大潜力。 （C）2015年中国科学院生态环境研究中心。由Elsevier B.V.发布

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