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首页> 外文期刊>Bioprocess and Biosystems Engineering >Efficacy of inorganic nitrogen removal by a salt-tolerant aerobic denitrifying bacterium, Pseudomonas sihuiensis LK-618
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Efficacy of inorganic nitrogen removal by a salt-tolerant aerobic denitrifying bacterium, Pseudomonas sihuiensis LK-618

机译：无机氮除去耐食性有氧脱氮细菌的疗效，假单胞菌Sihuiensis LK-618

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摘要

An aerobic denitrifying bacterium, stain LK-618, was isolated from lake sediment surface and the efficacy of inorganic nitrogen removal was tested. Stain LK-618 identified as Pseudomonas sihuiensis by 16S rRNA sequencing analysis. Trisodium citrate was found to be the ideal carbon source for this strain. When an initial nitrogen sources of approximately 50 mg/L nitrate, ammonium, or nitrite was solely selected as the nitrogen source, the nitrogen removal efficiencies were 91.4% (3.86 mg/L/h), 95.07% (2.47 mg/L/h) and 97.7% (2.41 mg/L/h), respectively. Nitrogen balance analysis revealed that 55.12% NO3--N was removed as N-2. Response surface methodology (RSM) analysis demonstrated that the optimal Total Nitrogen (TN) removal ratio for strain LK-618 was under C/N ratio of 12.63, shaking speed of 52.06 rpm, temperature of 28.5 degrees C and pH of 6.86. In addition, strain LK-618 could tolerate NaCl concentrations up to 20 g/L, and its most efficient denitrification capacity was presented at NaCl concentrations of 0-10 g/L. Therefore, strain LK-618 has potential application on the removal of inorganic nitrogen from saline wastewater under aerobic conditions.
机译：从湖泊沉积物表面分离出一种有氧脱氮细菌，染色LK-618，并测试无机氮去除的功效。染色LK-618鉴定为Pseudomonas sihuiiensis的16S rRNA测序分析。发现柠檬酸钠是该菌株的理想碳源。当单独选择约50mg / L硝酸盐，铵或亚硝酸盐的初始氮源作为氮源时，氮去除效率为91.4％（3.86mg / L / h），95.07％（2.47mg / L / h ）分别为97.7％（2.41 mg / L / h）。氮平衡分析显示，55.12％NO 3 - N作为N-2除去。响应面方法（RSM）分析证明应变LK-618的最佳总氮（TN）去除率在C / N比为12.63的比例下，振荡速度为52.06rpm，温度为28.5℃，pH为6.86。此外，菌株LK-618可耐受高达20g / L的NaCl浓度，并且其最有效的脱氮能力在NaCl浓度为0-10g / L。因此，菌株LK-618具有在有氧条件下从盐水废水中除去无机氮的潜在应用。

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  • 来源
    《Bioprocess and Biosystems Engineering》 |2021年第6期|1227-1235|共9页
  • 作者

    Hong Pei; Huang Yanlin; Chen Minglin; Xiao Bangding;

  • 作者单位

    Anhui Normal Univ Collaborat Innovat Ctr Recovery & Reconstruct Deg Sch Ecol & Environm Anhui Prov & Minist Educ Wuhu Peoples R China|Chinese Acad Sci Key Lab Algal Biol Chinese Acad Sci Inst Hydrobiol 7 Donghu South Rd Wuhan 430072 Peoples R China;

    Anhui Normal Univ Coll Life Sci Key Lab Conservat & Utilizat Important Biol Resou Wuhu 241000 Peoples R China;

    Anhui Normal Univ Coll Life Sci Key Lab Conservat & Utilizat Important Biol Resou Wuhu 241000 Peoples R China;

    Chinese Acad Sci Key Lab Algal Biol Chinese Acad Sci Inst Hydrobiol 7 Donghu South Rd Wuhan 430072 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Aerobic denitrification; Nitrogen removal; Nitrogen balance; Salt tolerance;

    机译：有氧脱氮;氮气脱氮;氮气平衡;耐盐性;

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