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首页> 外文期刊>The Korean journal of chemical engineering >Control and Nitrogen Load Estimation of Aerobic Stage in Full-Scale Sequencing Batch Reactor to Treat Strong Nitrogen Swine Wastewater
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Control and Nitrogen Load Estimation of Aerobic Stage in Full-Scale Sequencing Batch Reactor to Treat Strong Nitrogen Swine Wastewater

机译：规模化分批反应器中处理好氧猪场废水的好氧阶段的控制和氮负荷估算

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摘要

Three different control methods based on oxidation reduction potential (ORP) and dissolved oxygen (DO) for determining aeration time were evaluated for swine wastewater treatment at full-scale SBR. For determining the Ending Point of Ammonia Oxidation (EPAO), the plateau in ORP profile, the derivative of DO, and absolute DO were tested. Below 0.5 kg NH_4~+-N/m~3·day of influent loading rate, three control methods produced good results; however, above this loading rate, only absolute DO method was feasible. The volumetric ammonia nitrogen load at the sub-cycle (Kg NH_4~+-N/m~3/sub-cycle) had an effect on the period of aeration. To put it more concretely, the higher loading rate required a longer ammonia nitrogen oxidation period. To estimate nitrogen load, the length of low DO period, which was defined as the required time to reach 3 mg DO/l from the start of aeration, was the most proper parameter.
机译：评估了三种基于氧化还原电位（ORP）和溶解氧（DO）的不同控制方法来确定曝气时间，用于全规模SBR处理猪废水。为了确定氨氧化的终点（EPAO），测试了ORP曲线的平稳期，DO的导数和绝对DO。进水量低于0.5 kg NH_4〜+ -N / m〜3·d时，三种控制方法取得了良好的效果。但是，在此加载速率之上，仅绝对溶解氧方法是可行的。子循环的氨氮体积负荷（Kg NH_4〜+ -N / m〜3 /子循环）对曝气时间有影响。更具体地说，较高的负载速率需要更长的氨氮氧化时间。为了估算氮负荷，最合适的参数是低DO的时间长度，即从曝气开始到达到3 mg DO / l所需的时间。

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