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首页> 外文期刊>The Science of the Total Environment >Preparation, characterization, and application of macroporous activated carbon (MAC) suitable for the BAC water treatment process
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Preparation, characterization, and application of macroporous activated carbon (MAC) suitable for the BAC water treatment process

机译：适用于BAC水处理工艺的大孔活性炭（MAC）的制备，表征和应用

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To address the sharp decrease in efficiency of the biological activated carbon (BAC) process at low temperatures, a new type of activated carbon (AC), macroporous activated carbon (MAC), was developed from bamboowaste scraps via a special compression, carbonation and activation process without the introduction of chemicals. MAC contains not only the micron-level macropores (V-maco 0.71 ml/g) sufficient for bacteria to access and multiply, but ensures the developed smaller pores (particularly micropores, V-micro 0.41 ml/g) and a higher hardness (90%). In addition, the desired volume of macropores with an adiabatic function, which will provide livable space environment for bacteria, can be obtained by adjusting the compression ratio (1: 5-1: 10). Because of the maximum macropore volume (V-maco = 0.805 ml/g) and the most abundant macropore distribution (particularly diameters10,000 nm), MAC (1: 6) was selected for the parallel experiment in the laboratory, taking three representative commercial ACs (PICABIOL (R) 2, raw coal AC-1 and briquetting AC-2) as controls, in which the filtration effluent of a water treatment plant was used as the influent and glucose was added to accelerate bacterial growth. The results showed that MAC (1: 6) exhibited the highest DOC removal and biological activity at room/low temperatures (4 degrees C), indicating that the abundant macropores distribution with adiabatic function in MAC (1: 6) is conducive to the growth and breeding of microorganisms. It is equivalent to artificially increasing the surface suitable for bacteria attachment. This is coupled with the higher adsorption capacity for pollutants supplied by the developed micropores in MAC, which provided the substrate for bacteria growth, thus forming a benign circle for water treatment by the BAC process. The results provide significant technical support for BAC's application, particularly at cold temperatures. (c) 2018 Elsevier B.V. All rights reserved.
机译：为了解决低温下生物活性炭（BAC）工艺效率急剧下降的问题，通过特殊的压缩，碳化和活化作用从竹废料中开发了一种新型的活性炭（AC），即大孔活性炭（MAC）。无需引入化学品的过程。 MAC不仅包含足以使细菌进入和繁殖的微米级大孔（V-maco> 0.71 ml / g），而且可确保形成较小的孔（尤其是微孔，V-micro> 0.41 ml / g）和更高的硬度（> 90％）。另外，可以通过调节压缩比（1∶5-1∶10）获得所需的具有绝热功能的大孔体积，其将为细菌提供宜居的空间环境。由于最大的大孔体积（V-maco = 0.805 ml / g）和最丰富的大孔分布（特别是直径> 10,000 nm），在实验室中选择了MAC（1：6）作为平行实验，采用了三个代表性的作为对照的AC（PICABIOL2，原煤AC-1和压块AC-2），其中将水处理厂的过滤废水用作进水，并加入葡萄糖以促进细菌生长。结果表明，MAC（1：6）在室温/低温（4摄氏度）时表现出最高的DOC去除和生物活性，表明MAC（1：6）中具有绝热功能的大量大孔分布有利于生长和微生物的繁殖。这等效于人为地增加适合细菌附着的表面。这与MAC中已开发的微孔所提供的对污染物的更高吸附能力相结合，后者为细菌的生长提供了基质，从而形成了BAC工艺进行水处理的良性循环。结果为BAC的应用提供了重要的技术支持，尤其是在低温下。 （c）2018 Elsevier B.V.保留所有权利。

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