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首页> 外文期刊>Chemical engineering journal >Bioregeneration of azo dyes-loaded mono-amine modified silica in batch system: Effects of particle size and biomass acclimation condition
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Bioregeneration of azo dyes-loaded mono-amine modified silica in batch system: Effects of particle size and biomass acclimation condition

机译:分批系统中负载偶氮染料的单胺改性二氧化硅的生物再生:粒径和生物量适应条件的影响

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摘要

The effects of particle size of adsorbent and biomass acclimation condition on the bioregeneration of azo dye-loaded mono-amine modified silica (MAMS) adsorbents were investigated. The MAMS particles studied were of sizes 0.84-2.00 mm, 0.25-0.42 mm and 0.063-0.100 mm and the biomass acclimation conditions included the absence/presence of sucrose/hacto-peptone as the co-substrate. The results show that the bioregeneration duration of MAMS loaded with Acid Orange 7 (A07), Acid Yellow 9 (AY9) and Acid Red 14 (AR14), respectively, increased in decreasing particle size of MAMS adsorbent. Among the dye-loaded MAMS adsorbents, only the bioregeneration efficiency of A07-loaded MAMS was greatly affected by different particle sizes of MAMS with the bioregeneration efficiency decreased in decreasing size. Additionally, biomass acclimated to A07 in the absence of sucrose/bacto-peptone was found to be the better choice for the bioregeneration of A07-loaded MAMS adsorbent due to (i) shorter bioregeneration duration, (ii) less chemicals and aeration requirements and (iii) relatively good bioregeneration efficiencies found to be in the range of 78-82%.
机译:研究了吸附剂的粒径和生物质适应条件对负载偶氮染料的单胺改性二氧化硅(MAMS)吸附剂生物再生的影响。研究的MAMS颗粒的尺寸为0.84-2.00mm,0.25-0.42mm和0.063-0.100mm,并且生物质适应条件包括不存在/存在蔗糖/ hacto-to作为共底物。结果表明,分别载有酸性橙7(A07),酸性黄9(AY9)和酸性红14(AR14)的MAMS的生物再生持续时间随着MAMS吸附剂粒径的减小而增加。在负载染料的MAMS吸附剂中,只有A07负载的MAMS的生物再生效率受到不同粒径的MAMS的极大影响,而生物再生效率随着尺寸的减小而降低。此外,由于(i)较短的生物再生持续时间,(ii)较少的化学和曝气要求以及(a)在不存在蔗糖/细菌蛋白p的情况下,适应A07的生物量是A07负载的MAMS吸附剂生物再生的更好选择。 iii)发现相对较好的生物再生效率在78-82%的范围内。

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