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Conversion Mechanisms of Carbon, Nitrogen, and Phosphorus in Ozone-Fixed-Bed and Membrane Bioreactors for Deep Treatment of Municipal Tail Water

机译:臭氧固定床和膜生物反应器中碳,氮,磷的转化机理对城市尾水的深度处理

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摘要

An ozone-oyster shell fixed-bed bioreactor (OFBR) and a membrane bioreactor (MBR) were constructed and operated for about half a year for the deep treatment of municipal tail water. Pilot-scale test results showed that the combined OFBR-MBR had high removal efficiencies for carbon, ammonium, and phosphorus, and mean removal efficiencies for chemical oxygen demand, ammonium, total nitrogen, and total phosphorus (TP) were 75%, 99%, 20%, and 40%, respectively. Refractory organics in the municipal tail water were transformed to biodegradable organics in the OFBR, and the MBR effectively intercepted the surplus micro-molecular organics and microbes. Ammonium was mostly converted to nitrate, approximate to 10% of which was released as nitrogen gas through nitrification and denitrification by commonly known aerobic ammonia-oxidizing bacteria, nitrite-oxidizing bacteria, and denitrifying bacteria in the OFBR-MBR. The sludge was enriched in TP, which could be removed via surplus sludge discharge when sludge loading increased to overload amounts. Total removal depended on the uptake of phosphorus-accumulating organisms in the aerobic phase. Conversion mechanisms of carbon, nitrogen, and phosphorus in the OFBR-MBR system might be further adjusted to optimize process operation parameters, which might result in greater application of this system.
机译:建造了臭氧-牡蛎壳固定床生物反应器(OFBR)和膜生物反应器(MBR),并运行了大约半年,以对市政尾水进行深度处理。中试测试结果表明,组合的OFBR-MBR对碳,铵和磷具有较高的去除效率,对化学需氧量,铵,总氮和总磷(TP)的平均去除效率分别为75%,99% ,20%和40%。城市尾水中的难降解有机物在OFBR中转化为可生物降解的有机物,而MBR有效地拦截了多余的微分子有机物和微生物。铵大部分转化为硝酸盐,其中约10%的氨通过OFBR-MBR中常见的需氧氨氧化细菌,亚硝酸盐氧化细菌和反硝化细菌通过硝化和反硝化而作为氮气释放。污泥富含TP,当污泥负荷增加到超载量时,可通过剩余污泥排放将其去除。总去除量取决于需氧阶段对磷积累生物的吸收。可以进一步调整OFBR-MBR系统中碳,氮和磷的转化机制,以优化工艺操作参数,这可能会导致该系统的更多应用。

著录项

  • 来源
    《Environmental Engineering Science》 |2017年第8期|562-568|共7页
  • 作者单位

    South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Key Lab Pollut Control & Ecosyst Restorat Ind Clu, Minist Educ,Sch Environm & Energy, Guangzhou, Guangdong, Peoples R China|Inst Guangdong Elect Sci Res, Guangzhou, Guangdong, Peoples R China;

    South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Key Lab Pollut Control & Ecosyst Restorat Ind Clu, Minist Educ,Sch Environm & Energy, Guangzhou, Guangdong, Peoples R China;

    South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Key Lab Pollut Control & Ecosyst Restorat Ind Clu, Minist Educ,Sch Environm & Energy, Guangzhou, Guangdong, Peoples R China;

    South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Key Lab Pollut Control & Ecosyst Restorat Ind Clu, Minist Educ,Sch Environm & Energy, Guangzhou, Guangdong, Peoples R China;

    South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Key Lab Pollut Control & Ecosyst Restorat Ind Clu, Minist Educ,Sch Environm & Energy, Guangzhou, Guangdong, 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    conversion; ozone-oyster shell fix-bed bioreactor; membrane bioreactor; municipal tail water; nitrogen and phosphorus removal;

    机译:转化;臭氧-牡蛎壳固定床生物反应器;膜生物反应器;市政尾水;脱氮除磷;
  • 入库时间 2022-08-17 13:28:35

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