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首页> 外文期刊>Materials Chemistry and Physics >Characterization of stone powder sludge foams and their application to wastewater treatment: Role of pore connectivity
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Characterization of stone powder sludge foams and their application to wastewater treatment: Role of pore connectivity

机译：石粉污泥泡沫的表征及其在废水处理中的应用：孔连通性的作用

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摘要

Ceramic foams with different relative densities (i.e., different extension ratios) were successfully prepared from stone powder sludge (SPS) via a foaming and gelcasting method. Ceramic foams with various relative densities were characterized in terms of porosity, specific surface area, and water absorption capacity. The porosity of the ceramic foams ranged from 35% to 78%, depending on the extension ratio. The specific surface area and water absorption capacity increased as the relative density decreased (i.e., increasing extension ratio), resulting in enhanced pore connectivity. The feasibility of the SPS foams as microorganism-immobilized carriers and the effect of inner pores on simultaneous nitrifica-tion/denitrification were tested through wastewater treatment experiments. The results from fixed-bed reactors packed by SPS carriers with different relative densities revealed that the organic removal efficiency for all reactors was greater than 90%. In addition, the nitrification/denitrification experimental results suggested that the increase of the NH_4~+-N loading rate resulted in the improvement of nitrification efficiency and the decrease of nitrogen loss in all reactors. However, no significant correlation between relative density (i.e., extent of inner pore development) and nitrification/denitrification efficiency was found.
机译：通过发泡和凝胶浇铸法成功地从石粉污泥（SPS）中制备了具有不同相对密度（即不同的延伸率）的陶瓷泡沫。根据孔隙率，比表面积和吸水能力，对具有各种相对密度的陶瓷泡沫进行了表征。陶瓷泡沫的孔隙率在35％至78％之间，具体取决于延伸率。比表面积和吸水容量随着相对密度的降低（即，延伸比增加）而增加，从而导致孔连通性增强。通过废水处理实验测试了SPS泡沫作为固定化微生物的载体的可行性以及内孔对同时硝化/反硝化的影响。用相对密度不同的SPS载体填充的固定床反应器的结果表明，所有反应器的有机去除效率均大于90％。此外，硝化/反硝化实验结果表明，NH_4〜+ -N加载速率的提高导致硝化效率的提高和所有反应器氮损失的减少。但是，未发现相对密度（即内孔发展程度）与硝化/反硝化效率之间的显着相关性。

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  • 来源
    《Materials Chemistry and Physics》 |2012年第1期|26-30|共5页
  • 作者

    Yosep Han; Hyunjung Kim; Meiping Tong;

  • 作者单位

    Department of Natural Resources and Environmental Engineering, Hanyang University, #17, Heangdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea;

    Department of Mineral Resources and Energy Engineering, Chonbuk National University, 664-14 Duckjin-dong 1Ga, Duckjin-gu, Jeonju, Jeonbuk 556-756, Republic of Korea;

    The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    biomaterials; ceramics; adhesion; microstructure; surface properties;

    机译：生物材料陶瓷;附着力微观结构表面性质;

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