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首页> 外文期刊>RSC Advances >Evaluation and optimization of a pilot-scale catalytic ozonation-persulfate oxidation integrated process for the pretreatment of dry-spun acrylic fiber wastewater
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Evaluation and optimization of a pilot-scale catalytic ozonation-persulfate oxidation integrated process for the pretreatment of dry-spun acrylic fiber wastewater

机译：试验规模催化臭氧化 - 过硫酸盐氧化综合加工氧化综合方法的评价与优化，用于干燥旋转丙烯酸纤维废水的预处理

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An integrated process of catalytic ozonation-persulfate oxidation was developed for the pretreatment of dry-spun acrylic fiber (DAF) wastewater on a pilot scale. Box-Behnken design and response surface methodology (RSM) were used for the design and optimization of the integrated process. A secondorder polynomial regression equation was established to describe the chemical oxygen demand (COD) and total nitrogen (TN) removal efficiency of the integrated process and was validated by the analysis of variance and residual techniques. The interaction effects of operational parameters were investigated using response surface analysis. Results showed that the maximum COD and TN removal efficiency of 42.36% and 28.51% were achieved for DAF wastewater when the reaction time, reaction temperature, addition of ozone and addition of persulfate were 4.44 h, 61.82 degrees C, 40 g h(-1) and 1.3 kg t(-1), respectively. Furthermore, the biodegradability of raw and treated DAF wastewater was compared, and the (BOD5)/COD (B/C) ratio increased from 0.078 to 0.315, indicating a significant biodegradability improvement. The comparison of N composition before and after the integrated process indicated that organonitrogen was converted into ammonia nitrogen, nitrate nitrogen, and nitrogen, which resulted in the removal TN. This result confirmed that the integrated process of catalytic ozonation-persulfate oxidation was effective in improving the biodegradability of DAF wastewater and was promising for pretreatment prior to biological treatment.
机译：开发了催化臭氧化 - 过硫酸盐氧化的综合方法，用于在先导规模上进行干纺丙烯酸纤维（DAF）废水的预处理。 Box-Behnken设计和响应表面方法（RSM）用于设计和优化综合过程。建立了二阶多项式回归方程以描述综合过程的化学需氧量（COD）和总氮（TN）去除效率，并通过分析方差和残余技术进行验证。使用响应表面分析研究了操作参数的相互作用效应。结果表明，当反应时间，反应温度，臭氧加入并加入过硫酸盐时，对DAF废水的最大鳕鱼和TN去除效率为42.36％和28.51％，为4.44小时，61.82℃，40 GH（-1）分别为1.3千克T（-1）。此外，原料和处理过的DAF废水的生物降解性进行了比较，并且（BOD5）/ COD（B / C）比从0.078增加至0.315，指示显著生物降解性的改善。综合方法之前和之后N组合物的比较表明将子硝基转化为氨氮，硝酸盐氮和氮，导致去除Tn。该结果证实，催化臭氧化 - 过硫酸盐氧化的综合过程是有效改善DAF废水的生物降解性，并且在生物处理之前对预处理有望。

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  • 来源
    《RSC Advances》 |2017年第70期|共9页
  • 作者

    Wu Zong-wei; Xu Xiao-chen; Jiang Hong-bin; Zhang Ruo-yu; Song Shuai-nan; Zhao Chuan-qi; Yang Feng-lin;

  • 作者单位

    Dalian Univ Technol China Minist Educ Sch Environm Sci &

    Technol Key Lab Ind Ecol &

    Environm Engn Linggong Rd 2 Dalian 116024 Peoples R China;

    Dalian Univ Technol China Minist Educ Sch Environm Sci &

    Technol Key Lab Ind Ecol &

    Environm Engn Linggong Rd 2 Dalian 116024 Peoples R China;

    Dalian Univ Technol China Minist Educ Sch Environm Sci &

    Technol Key Lab Ind Ecol &

    Environm Engn Linggong Rd 2 Dalian 116024 Peoples R China;

    Dalian Univ Technol China Minist Educ Sch Environm Sci &

    Technol Key Lab Ind Ecol &

    Environm Engn Linggong Rd 2 Dalian 116024 Peoples R China;

    Dalian Univ Technol China Minist Educ Sch Environm Sci &

    Technol Key Lab Ind Ecol &

    Environm Engn Linggong Rd 2 Dalian 116024 Peoples R China;

    Dalian Univ Technol China Minist Educ Sch Environm Sci &

    Technol Key Lab Ind Ecol &

    Environm Engn Linggong Rd 2 Dalian 116024 Peoples R China;

    Dalian Univ Technol China Minist Educ Sch Environm Sci &

    Technol Key Lab Ind Ecol &

    Environm Engn Linggong Rd 2 Dalian 116024 Peoples R China;

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