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首页> 外文期刊>Bioprocess and Biosystems Engineering >Hydrolyzed polyacrylamide biotransformation in an up-flow anaerobic sludge blanket reactor system: key enzymes, functional microorganisms, and biodegradation mechanisms
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Hydrolyzed polyacrylamide biotransformation in an up-flow anaerobic sludge blanket reactor system: key enzymes, functional microorganisms, and biodegradation mechanisms

机译：上流厌氧污泥床反应器系统中水解聚丙烯酰胺的生物转化：关键酶，功能微生物和生物降解机制

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摘要

Hydrolyzed polyacrylamide (HPAM) biotransformation in an up-flow anaerobic sludge blanket reactor including biodegradation performances, biodegradation mechanisms, key enzymes, and functional microorganisms was explored. Response surface methodology was applied to further improve HPAM degradation. The predicted degradation ratios of HPAM and CODCr were 46.2% and 83.4% under the optimal conditions. HPAM biodegradation ratio and total organic carbon removal ratio reached 40.5% and 38.9%. Total nitrogen concentration was dramatically decreased with the increasing fermentation time during the fermentation, while low ammonia nitrogen (NH4+-N) and nitrite nitrogen (NO2--N) were generated. NH4+-N and NO2--N increased slightly on the whole. Enzyme activity change was correlated with HPAM biodegradation. Dehydrogenase activity had a decline of 21.3-41.0%, and the minimum value occurred at 300mg/L of HPAM. Urease activity was varied from 28.7 to 78.7% and the maximal inhibition ratio occurred at 200mg/L of HPAM. Mechanisms for the biodegradation of HPAM were also explored by FT-IR, HPLC, and SEM. The results indicated that long-chain HPAM was broken into micromolecule compounds and the amide groups of HPAM were transformed into carboxyl groups. Based on the sequencing results on an Illumina MiSeq platform, Proteobacterias, Bacteroidetes, and Chloroflexi were turned out to be the critical microorganisms involved in HPAM degradation. This work lays a basis for HPAM-containing wastewater treatment and offers a support for water saving and emission reduction. It is of great significance to the sustainable development of oilfield.
机译：探索了上流式厌氧污泥床反应器中的水解聚丙烯酰胺（HPAM）的生物转化，包括生物降解性能，生物降解机理，关键酶和功能微生物。应用响应面方法进一步改善了HPAM的降解。在最佳条件下，HPAM和CODCr的预测降解率分别为46.2％和83.4％。 HPAM的生物降解率和总有机碳去除率分别达到40.5％和38.9％。随着发酵过程中发酵时间的增加，总氮浓度显着降低，同时生成低氨氮（NH4 + -N）和亚硝酸盐氮（NO2--N）。 NH4 + -N和NO2--N总体上略有增加。酶活性的变化与HPAM的生物降解有关。脱氢酶活性下降21.3-41.0％，最低值出现在300mg / L的HPAM。脲酶活性从28.7到78.7％不等，最大抑制率出现在200mg / L的HPAM。 FT-IR，HPLC和SEM还探讨了HPAM生物降解的机理。结果表明，长链HPAM被分解为微分子化合物，HPAM的酰胺基被转化为羧基。根据在Illumina MiSeq平台上的测序结果，事实证明，变形杆菌，拟杆菌和绿弯曲菌是参与HPAM降解的关键微生物。这项工作为含HPAM的废水处理奠定了基础，并为节水和减排提供了支持。这对油田的可持续发展具有重要意义。

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  • 来源
    《Bioprocess and Biosystems Engineering》 |2019年第6期|941-951|共11页
  • 作者

    Zhao Lanmei; Song Tianwen; Han Dong; Bao Mutai; Lu Jinren;

  • 作者单位

    Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Inst Adv Ocean Study, Qingdao 266100, Shandong, Peoples R China|Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Shandong, Peoples R China;

    Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Inst Adv Ocean Study, Qingdao 266100, Shandong, Peoples R China|Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Shandong, Peoples R China;

    Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Inst Adv Ocean Study, Qingdao 266100, Shandong, Peoples R China|Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Shandong, Peoples R China|Qingdao Univ Sci & Technol, Dept Chem Engn, Gaomi Campus, Qingdao 261500, Shandong, Peoples R China;

    Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Inst Adv Ocean Study, Qingdao 266100, Shandong, Peoples R China|Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Shandong, Peoples R China;

    Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Shandong, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Hydrolyzed polyacrylamide; Up-flow anaerobic sludge blanket; Biodegradation mechanisms; Enzyme activities; Key microorganisms;

    机译：水解聚丙烯酰胺;上流厌氧污泥床;生物降解机理;酶活性;关键微生物;

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