Abstract Studies on influence of process parameters on simultaneous biodegradation of atrazine and nutrients in aquatic environments by a membrane photobioreactor
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Studies on influence of process parameters on simultaneous biodegradation of atrazine and nutrients in aquatic environments by a membrane photobioreactor

机译：膜光生物反应器工艺参数对水环境中at去津和营养物质同时生物降解的影响

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摘要

AbstractA Lab scale algal-bacterial membrane photobioreactor (MPBR) was designed and operated under 12-h light and 12-h dark conditions with a light intensity of 8000lx, in order to investigate the effects of initial concentrations of atrazine, carbon concentration, and hydraulic retention time on the ability of this photobioreactor in simultaneous removal of atrazine and nutrients in the continuous mode. The removal efficiencies of atrazine (ATZ), chemical oxygen demand (COD), phosphorus (PO43--P) and nitrogen (NOx) in optimum condition was more than 95%, 99%, 98% and 97% when the maximum removal rates were 9.5 × 10−3, 99.231, 11.773 and 7.762mg/L-day, respectively. Results showed that the quality of the effluent was reduced by the increase of atrazine concentration. The outcomes on the hydraulic and toxic shocks indicated that the system has a relatively good resistance to the shocks and can return to the stable conditions. Microalgae showed a great deal of interest and capability in cultivating and attaching to the surface of the membrane and bioreactor, and the total biomass accumulated in the system was greater than 6g/L. The kinetic coefficients of atrazine removal were also studied using various kinetic models. The maximum atrazine removal rate was determined by the modified Stover-Kincannon model. The results approved the ability of the MPBR reactor in wastewater treatment and microalgae cultivation and growth. The decline of atrazine concentration in this system could be attributed to the algal-bacterial symbiosis and co-metabolism process. Accordingly, the MPBR reactor is a practical, simple, economical and therefore suitable process for simultaneous biodegradation of chlorinated organic compounds and nutrients removal from aquatic environments.Highlights•Membrane photobioreactor was tested for atrazine, COD and nutrients removal.•All target pollutants were removed in MPBR systems.•High biomass accumulation and changes in the biomass composition was observed.•A high quality effluent was recorded in the MPBR.
机译： 摘要 按顺序设计了实验室规模的藻细菌膜光生物反应器（MPBR），并在12h光照和12h黑暗条件下以8000lx的光照强度运行考察at去津的初始浓度，碳浓度和水力停留时间对该光生物反应器在连续模式下同时去除r去津和养分的能力的影响。去除azine去津（ATZ），化学需氧量（COD），磷（PO 4 3- -P）和最佳去除条件下的氮（NOx）大于95％，99％，98％和97％时最大去除率是9.5×10 − 3 ，99.231、11.773和7.762mg / L-day。结果表明，of去津浓度的增加会降低废水的质量。水力和有毒冲击的结果表明，该系统具有相对较好的抗冲击能力，可以恢复到稳定的状态。微藻在培养和附着在膜和生物反应器表面上表现出极大的兴趣和能力，并且系统中积累的总生物量大于6g / L。还使用各种动力学模型研究了去除r去津的动力学系数。通过改良的Stover-Kincannon模型确定最大的阿特拉津去除率。结果证实了MPBR反应器在废水处理以及微藻培养和生长中的能力。该系统中阿特拉津浓度的下降可能归因于藻-细菌共生和共代谢过程。因此，MPBR反应器是一种实用，简单，经济且因此合适的方法，可用于同时进行氯化有机化合物的生物降解和从水生环境中去除营养物。 突出显示 • 对膜光生物反应器进行了阿特拉津，COD和营养物质去除的测试。 • 在MPBR系统中已除去所有目标污染物。 • 高生物量a • MPBR中记录了高质量的废水。

著录项

  • 来源
    《Environmental research》 |2018年第2期|599-608|共10页
  • 作者

    Zahra Derakhshan; Amir Hossein Mahvi; Mohammad Hassan Ehrampoush; Seyed Mohammad Mazloomi; Mohammad Faramarzian; Mansooreh Dehghani; Saeed Yousefinejad; Mohammad Taghi Ghaneian; S. Mehran Abtahi;

  • 作者单位

    Environmental Science and Technology Research Center, Department of Environmental Health Engineering, Shahid Sadoughi University of Medical Sciences,Department of Environmental Health, School of Health, Larestan, University of Medical Sciences;

    Center for Solid Waste Research (CSWR), Institute for Environmental Research (IER), Tehran University of Medical Sciences,Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences;

    Environmental Science and Technology Research Center, Department of Environmental Health Engineering, Shahid Sadoughi University of Medical Sciences;

    Nutrition Research Center, Department of Food Hygiene and Quality Control, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences;

    Research Center for Health Sciences, Department of Environmental Health, School of Health, Shiraz University of Medical Sciences;

    Research Center for Health Sciences, Department of Environmental Health, School of Health, Shiraz University of Medical Sciences;

    Research Center for Health Sciences, Department of Occupational Health Engineering, School of Health, Shiraz University of Medical Sciences;

    Environmental Science and Technology Research Center, Department of Environmental Health Engineering, Shahid Sadoughi University of Medical Sciences;

    Université de Toulouse, INPT, UPS, Laboratoire de Génie Chimique, 4 Allée Emile Monso;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Atrazine; Kinetic models; Membrane photobioreactor; Microalga; Modified Stover-Kincannon model; Nutrients;

    机译：阿特拉津;动力学模型;膜光生物反应器;微藻;改良的Stover-Kincannon模型;营养素;

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