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首页> 外文期刊>Journal of Environmental Science and Health >Feeding schemes and C/N ratio of a laboratory-scale step-fed sequencing batch reactor for liquid swine manure treatment
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Feeding schemes and C/N ratio of a laboratory-scale step-fed sequencing batch reactor for liquid swine manure treatment

机译：实验室规模的分批进料测序间歇反应器用于液化猪粪处理的进料方案和C / N比

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摘要

This study was undertaken to investigate the effect of two split feeding schemes (600mL/200mL and 400mL/400mL, designated as FS1 and FS2, respectively) on the performance of a step-fed sequencing batch reactor (SBR) in treating liquid swine manure for nutrient removal. The SBR was run on an 8-h cycle with a repeated pattern of anaerobic/anoxic/aerobic phases in each cycle and the two feedings always occurred at the beginning of each anaerobic phase. A low-level aeration was used (1.0L/m(3).sec) for the anoxic/aerobic phase to facilitate nitrification and phosphorus uptake while reducing the energy consumption. The results showed that FS1 reduced NH4+-N by 98.7% and FS2 by 98.3%. FS1 had 12.3mg/L NO3-N left in the effluent, while FS2 had 4.51mg/L. For soluble phosphorus removal, FS1 achieved 95.2%, while FS2 reached only 68.5%. Both feeding schemes achieved95% removal of COD. A good power regression was observed between total nitrogen (sum of all three nitrogen species) and the carbon to nitrogen (C/N) ratio, with the correlation coefficients of 0.9729 and 0.9542 for FS1 and FS2, respectively, based on which it was concluded that higher C/N ratios were required to achieve higher nitrogen removal efficiencies.
机译：这项研究旨在研究两种分批喂料方案（分别为600mL / 200mL和400mL / 400mL，分别命名为FS1和FS2）对分批进料测序间歇反应器（SBR）在处理猪粪中的性能的影响。营养去除。 SBR运行8小时，在每个循环中都有厌氧/缺氧/好氧阶段的重复模式，两次进料总是在每个厌氧阶段开始时进行。在缺氧/好氧阶段使用低浓度曝气（1.0L / m（3）.sec），以促进硝化作用和磷的吸收，同时降低能耗。结果表明，FS1使NH4 + -N减少98.7％，FS2减少98.3％。 FS1的废水中残留NO3-N为12.3mg / L，而FS2为4.51mg / L。对于可溶性磷的去除，FS1达到95.2％，而FS2仅达到68.5％。两种进料方案均实现了95％的COD去除率。在总氮（所有三种氮的总和）与碳氮比（C / N）之间观察到良好的幂回归，得出FS1和FS2的相关系数分别为0.9729和0.9542。需要更高的C / N比才能达到更高的脱氮效率。

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