Performance of a Fixed‐Bed Bioreactor Using Diatom Biofilms for Wastewater Bioremediation,Clean - Soil Air Water

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Performance of a Fixed‐Bed Bioreactor Using Diatom Biofilms for Wastewater Bioremediation
Clean - Soil Air Water ( IF 1.5 ) Pub Date : 2021-03-20 , DOI: 10.1002/clen.202000282
Nadjla Chaib ₁ , Sabrina Dzizi _{1,

2} , Hadjer Kaddeche _{2,

3} , Faiza Noune _{2,

3}

Affiliation

This present study aims to demonstrate the efficiency of a simple biological wastewater treatment process using diatoms for removing mainly nitrogen and phosphorus from four types of effluents: synthetic wastewater (SW), a real urban effluent (RUE), industrial effluent (IE), and agricultural sewage (AS). The process consists of promoting the attachment of diatoms to several grain sizes to form biofilms, to define the best grain size for the performance and to study the evolution of diatom biofilms and some parameters, such as ammonium, nitrate, phosphorus, and chemical oxygen demand (COD). Diatoms used in this study are collected from the highest rate of biomass growth of diatoms grown in an experimental photobioreactor. Initially, four fixed‐bed bioreactors in batch mode are experienced over artificial conditions and filled with coarse sand (B1), small gravel (B2), medium gravel (B3), and coarse gravel (B4). The bioreactor B2 is selected to study the evolution of nutrients for the four types of wastewater. The best removal rates are measured as 75.26% for ammonium, 72.43% for nitrate, and 61.65% for phosphorus for SW. Important rates of COD are also recorded for RUE (75.29%). These results demonstrate that nutrients in the wastewater can be successfully removed by diatom biofilms.

中文翻译：

使用硅藻生物膜的固定床生物反应器在废水生物修复中的性能

本研究旨在证明使用硅藻进行简单生物废水处理的效率，该硅藻能够从四种类型的废水中主要去除氮和磷：合成废水（SW），实际城市废水（RUE），工业废水（IE）和农业污水（AS）。该过程包括促进硅藻与几种晶粒大小的附着以形成生物膜，定义性能最佳的晶粒大小，研究硅藻生物膜的演变以及某些参数（例如铵，硝酸盐，磷和化学需氧量）（COD）。本研究中使用的硅藻是从实验光生物反应器中生长的硅藻的生物质最高生长速率收集的。最初，在人工条件下经历了四个分批模式的固定床生物反应器，并充满了粗砂（B1），小碎石（B2），中碎石（B3）和粗碎石（B4）。选择生物反应器B2来研究四种类型废水的养分演变。最好的去除率是铵的75.26％，硝酸盐的72.43％和磷的61.65％。还记录了RUE的重要COD率（75.29％）。这些结果表明，硅藻生物膜可以成功去除废水中的养分。

更新日期：2021-05-07

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