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首页> 外文期刊>Environmental Science & Technology >Exploring Utilization of Recycled Agricultural Biomass in Constructed Wetlands: Characterization of the Driving Force for High-Rate Nitrogen Removal
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Exploring Utilization of Recycled Agricultural Biomass in Constructed Wetlands: Characterization of the Driving Force for High-Rate Nitrogen Removal

机译：在人工湿地中探索回收农业生物质的利用：高速脱氮的驱动力表征

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摘要

Improper treatment of various wastewaters with a low C/N ratio and management of abundant agricultural wastes may pose a serious threat to bodies of water and agricultural ecosystems in rural areas, especially in developing countries. Thus, a potential alternative for simultaneous mitigation of this pollution is needed to protect rural environments. This study investigated the feasibility and enhanced performance of applying typical agricultural wastes (such as wheat straw, apricot pits, and walnut shells) as carbon sources for nitrogen removal in constructed wetlands (CWs). The leaching experiment employed fluorescence excitation emission spectrophotometry and revealed that the wheat straw material had the highest capability of carbon release with an average dissolved organic carbon release content and rate of 27.88 mg g(-1) and 5.24 mg g(-1) day(-1), respectively. Dissolved organic matter released from different agricultural wastes mainly consisted of humic acid-like and fulvic acid-like compounds. Long-term assessment of lab-scale intermittent aeration CWs receiving agricultural wastes revealed a high total nitrogen removal of 66.75-93.67% in low carbonitrogen ratio wastewaters (C/N = 3). These findings can contribute to a better understanding of the driving mechanism through which agricultural wastes enhance nitrogen removal in CW wastewater treatments.
机译：各种低碳氮比的废水处理不当以及丰富的农业废弃物的管理可能对农村地区，特别是发展中国家的水域和农业生态系统构成严重威胁。因此，需要一种同时减轻这种污染的潜在替代方法来保护农村环境。这项研究调查了使用典型的农业废弃物（例如麦草，杏核和核桃壳）作为碳源来去除人工湿地（CW）中氮的可行性和增强的性能。浸出实验采用荧光激发发射分光光度法，发现小麦秸秆材料具有最高的碳释放能力，平均溶解有机碳释放量为27.88 mg g（-1）和5.24 mg g（-1）天。 -1）。从各种农业废弃物中释放出来的溶解性有机物主要由腐殖酸类和黄腐酸类化合物组成。对接受农业废料的实验室规模的间歇曝气化工厂进行的长期评估显示，低碳/氮比废水（C / N = 3）的总氮去除率高达66.75-93.67％。这些发现可以有助于更好地了解驱动力机理，通过这种机理，农业废物可以提高化学废水处理中氮的去除率。

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  • 来源
    《Environmental Science & Technology》 |2019年第3期|1258-1268|共11页
  • 作者

    Jia Lixia; Gou Enfang; Liu Hai; Lu Shaoyong; Wu Shubiao; Wu Haiming;

  • 作者单位

    Northwest A&F Univ, Coll Resources & Environm, Yangling 712100, Shaanxi, Peoples R China;

    Harbin Inst Technol, State Key Lab Urban Water Resources & Environm, Harbin 150090, Heilongjiang, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Chinese Res Inst Environm Sci, Natl Engn Lab Lake Pollut Control & Ecol Restorat, Beijing 100012, Peoples R China;

    Northwest A&F Univ, Coll Resources & Environm, Yangling 712100, Shaanxi, Peoples R China|Aarhus Univ, Aarhus Inst Adv Studies, DK-8000 Aarhus C, Denmark;

    Northwest A&F Univ, Coll Resources & Environm, Yangling 712100, Shaanxi, Peoples R 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);美国《化学文摘》(CA);
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