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Effect of sponge volume on the performance of down-flow hanging sponge system treating UASB reactor effluent

机译：海绵体积对下流式悬挂海绵系统处理UASB反应器废水性能的影响

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摘要

The performance of down-flow hanging sponge (DHS) system treating UASB reactor effluent at different sponge volume of 38.2, 28.7, 19.1 and 9.6% was investigated. The hydraulic retention time (HRT) and flow rate were kept constant at 2.6 h and 0.46 m~3/day, respectively. The results obtained indicated that reducing the sponge volume of the DHS system from 38.2 to 19.1% significantly decreased the removal efficiency of COD_(tatal) from 80 ± 8 to 62 ± 14%; COD_(soluble) from 71.2 ± 10 to 53.7 ± 18% and COD_(particulate) from 86 ± 10 to 62 ± 15%. With further reduction of the sponge volume down to 9.6%, the removal efficiency was dropped to 54 ± 15% for COD_(total); 44.1 ± 14% for COD_(soluble) and 42 ± 12%for COD_(particulate). Likewise, the nitrification efficiency and fecal coliform (FC) removal was strongly affected by decreasing the sponge volume of the DHS system, i.e., the nitrificationrnefficiency was dropped by a value of 48.3% when reducing the sponge volume of the DHS system from 38.2 to 19.1%. At sponge volume of 38.2%, the DHS system removes 2.6 ± 0.3 log_(10)/100 ml of FC which is significantly higher than that at sponge volume of 28.7, 19.1 and 9.6%. Accordingly, it is recommended to design and operate such a system at a bulk sponge volume not exceeding 38.2% of the total reactor volume and at an HRT of 2.6 h.
机译：研究了下流式悬挂海绵（DHS）系统在38.2％，28.7％，19.1％和9.6％的不同海绵体积下处理UASB反应器流出物的性能。水力停留时间（HRT）和流量分别保持恒定，分别为2.6 h和0.46 m〜3 / day。获得的结果表明，将DHS系统的海绵体积从38.2减少到19.1％，可将COD_（tal）的去除效率从80±8降低到62±14％。 COD_（可溶性）为71.2±10至53.7±18％，COD_（颗粒）为86±10至62±15％。随着海绵体积的进一步减小至9.6％，COD_（总）的去除效率降至54±15％； COD_（可溶性）为44.1±14％，COD_（颗粒）为42±12％。同样，减少DHS系统的海绵体积会严重影响硝化效率和粪便大肠菌群（FC）的去除，即，将DHS系统的海绵体积从38.2减少到19.1时，硝化效率会降低48.3％。 ％。在海绵体积为38.2％的情况下，DHS系统会去除2.6±0.3 log_（10）/ 100 ml的FC，这明显高于海绵体积为28.7、19.1和9.6％的FC。因此，建议以不超过反应器总体积的38.2％的大块海绵体积和2.6 h的HRT设计和运行该系统。

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  • 来源
    《Bioprocess and Biosystems Engineering》 |2010年第7期|P.779-785|共7页
  • 作者

    A. Tawfik; rnA. Ohashi; rnH. Harada;

  • 作者单位

    Water Pollution Research Department, National Research Center, P.O. Box 12622, El-Behouth St, Dokki, Cairo, Egypt;

    rnDepartment of Environmental System Engineering, Nagaoka University of Technology, Kamitomioka 1603-1, Niigata, Nagaoka 940-2188, Japan Graduate School of Engineering, Faculty of Engineering, Hiroshima University, Hiroshima, Japan;

    rnDepartment of Environmental System Engineering, Nagaoka University of Technology, Kamitomioka 1603-1, Niigata, Nagaoka 940-2188, Japan Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan;

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  • 正文语种 eng
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  • 关键词

    UASB; DHS; sponge volume; nitrification; COD; fecal coliform;

    机译：UASB;国土安全部;海绵体积硝化作用化学需氧量粪大肠菌群;

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