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首页> 外文期刊>Bioprocess and Biosystems Engineering >Partial nitrification and nutrient removal in intermittently aerated sequencing batch reactors treating separated digestate liquid after anaerobic digestion of pig manure
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Partial nitrification and nutrient removal in intermittently aerated sequencing batch reactors treating separated digestate liquid after anaerobic digestion of pig manure

机译：间歇曝气顺序分批反应器中的部分硝化和养分去除，处理猪粪厌氧消化后分离的消化液

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摘要

The performance of an intermittently aerated sequencing batch reactor (IASBR) technology was investigated in achieving partial nitrification, organic matter removal and nitrogen removal from separated digestate liquid after anaerobic digestion of pig manure. The wastewater had chemical oxygen demand (COD) concentrations of 11,540 ± 860 mg/L, 5-day biochemical oxygen demand (BOD_5) concentrations of 2,900 ± 200 mg/L and total nitrogen (TN) concentrations of 4,041 ± 59 mg/L, with low COD:N ratios (2.9) and BOD_5:COD ratios (0.25). Synthetic wastewater, simulating the separated digestate liquid with similar COD and nitrogen concentrations but BOD, of 11,500 ± 100 mg/L, was also treated using the IASBR technology. At a mean organic loading rate of 1.15 kg COD/(m~3 d) and a nitrogen loading rate of 0.38 kg N/(m~3 d), the COD removal efficiency was 89.8% in the IASBR (IASBR-1) treating digestate liquid and 99% in the IASBR (IASBR-2) treating synthetic wastewater. The IASBR-1 effluent COD was mainly due to inert organic matter and can be further reduced to less than 40 mg/L through coagulation. The partial nitrification efficiency of 71-79% was achieved in the two IASBRs and one cause for the stable long-term partial nitrification was the intermittent aeration strategy. Nitrogen removal efficiencies were 76.5 and 97% in IASBR-1 and IASBR-2, respectively. The high nitrogen removal efficiencies show that the IASBR technology is a promising technology for nitrogen removal from low COD:N ratio wastewaters. The nitrogen balance analysis shows that 59.4 and 74.3% of nitrogen removed was via heterotrophic denitrification in the non-aeration periods in IASBR-1 and IASBR-2, respectively.
机译：在对猪粪进行厌氧消化后，研究了间歇充气分批反应器（IASBR）技术的性能，该方法可实现从分离的消化液中部分硝化，去除有机物和去除氮。废水的化学需氧量（COD）浓度为11,540±860 mg / L，5天生化需氧量（BOD_5）浓度为2,900±200 mg / L，总氮（TN）浓度为4,041±59 mg / L，具有较低的COD：N比（2.9）和BOD_5：COD比（0.25）。还使用IASBR技术处理了合成废水，该废水模拟了分离的消化液，其COD和氮的浓度相似，但BOD为11,500±100 mg / L。在IASBR（IASBR-1）处理的平均有机负荷率为1.15 kg COD /（m〜3 d）和氮负荷率为0.38 kg N /（m〜3 d）时，COD去除效率为89.8％。可以在IASBR（IASBR-2）中消化液体，并将其中的99％用于处理合成废水。 IASBR-1废水的COD主要归因于惰性有机物，可通过凝结进一步降低至40 mg / L以下。两种IASBR的部分硝化效率均达到71-79％，间歇性曝气策略是长期稳定的部分硝化的原因之一。 IASBR-1和IASBR-2的脱氮效率分别为76.5和97％。高脱氮效率表明，IASBR技术是一种从低COD：N比废水中脱氮的有前途的技术。氮平衡分析表明，在IASBR-1和IASBR-2的非曝气时期，分别通过异养反硝化去除了59.4％和74.3％的氮。

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  • 来源
    《Bioprocess and Biosystems Engineering》 |2011年第9期|p.1049-1056|共8页
  • 作者

    Mingchuan Zhang; Peadar G. Lawlor; Guangxue Wu; Brendan Lynch; Xinmin Zhan;

  • 作者单位

    Civil Engineering, College of Engineering and Informatics, National University of Ireland, Galway, Ireland;

    Teagasc, Pig Development Department, Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland;

    Teagasc, Pig Development Department, Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland,Research Center for Environmental Engineering and Management, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China;

    Teagasc, Pig Development Department, Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland;

    Civil Engineering, College of Engineering and Informatics, National University of Ireland, Galway, Ireland;

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  • 正文语种 eng
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  • 关键词

    intermittent aeration; nitrogen removal; partial nitrification; pig manure; separated digestate liquid;

    机译：间歇充气脱氮部分硝化猪粪分离消化液;

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