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首页> 外文期刊>The Science of the Total Environment >The effect of fermented superphosphate pretreatment and step-feed mode on biological denitrification of piggery wastewater
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The effect of fermented superphosphate pretreatment and step-feed mode on biological denitrification of piggery wastewater

机译：发酵过磷酸盐预处理及阶梯饲料模式对猪渣废水生物反硝化的影响

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Chemical pretreatment can reduce NH3-N levels in piggery wastewater to a certain extent, but the lack of a carbon source for subsequent biological treatment leads to a low denitrification efficiency and poor total nitrogen (TN) removal percentage. Taking superphosphate (SP) pretreatment (SP/Pretreatment) as the control, this research studies the influence of fermented superphosphate (FSP; SP plus a carbon source) pretreatment (FSP/Pretreatment) on biological denitrification in a subsequent biological treatment step. Furthermore, the removal of pollutants under different influent modes is also evaluated. The experimental results show that with the addition of the SP pretreatment, the removal percentage of NH3-N was 52%, and the chemical oxygen demand (COD)/TN ratio increased from 0.36 to 0.71. However, with the addition of the FSP pretreatment, the removal percentage of NH3-N reached 64%, and the COD/TN ratio increased to 2.28. The combination of the FSP pretreatment and a subsequent sequencing batch reactor (SBR) step in the step-feed influent mode resulted in the best denitrification, with a TN removal percentage of 57%. This result was 51% higher than that of the SP/Pretreatment-SBR system, indicating that the addition of the FSP pretreatment improves the biological denitrification of piggery wastewater. After the full treatment process for piggery wastewater, the effluent COD was 57.33mg.L-1, the NH3-N was 66.32 mg.L-1, and the total phosphorus (TP) was 1.17 mg.L-1, all of which meet the emission standards of the "Fouling Standards for Pollutants in the Livestock Breeding Industry" (GB 18596-2001) (400 mg.L-1 COD, 80 mg.L-1 NH3-N, 8 mg.L-1 TP). (c) 2019 Elsevier B.V. All rights reserved.
机译：化学预处理可以在一定程度上降低PIGGERY废水中的NH3-N水平，但随后的生物处理缺乏碳源导致低脱氮效率和差的总氮（TN）去除百分比。采用过磷酸盐（SP）预处理（SP /预处理）作为对照，本研究研究了发酵过磷酸盐（FSP; SP加上碳源）预处理（FSP /预处理）对后续生物处理步骤的生物反硝化的影响。此外，还评估了不同进水模式下的污染物去除。实验结果表明，随着SP预处理的添加，NH 3-N的去除百分比为52％，化学需氧量（COD）/ TN比率从0.36增加到0.71。然而，随着FSP预处理的添加，NH 3-N的去除百分比达到64％，COD / TN比率增加到2.28。在步进进料模式中的FSP预处理和随后的测序批量反应器（SBR）步骤的组合导致最佳脱氮，除去百分比为57％。该结果比SP /预处理-SBR系统高51％，表明加入FSP预处理改善了猪废水的生物反硝化。在填料废水的全处理过程之后，流出物鳕鱼是57.33mg.L-1，NH3-N为66.32mg.L-1，总磷（TP）为1.17mg.L-1，所有这些符合“畜禽育种工业污染物污染物标准”排放标准（GB 18596-2001）（400 mg.L-1 COD，80 mg.L-1 NH3-N，8 Mg.L-1 TP） 。 （c）2019 Elsevier B.v.保留所有权利。

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