class='kwd-title'>Keywords: CaCO3 precipitation,'/> Optimization of bio-cement production from cement kiln dust using microalgae
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Optimization of bio-cement production from cement kiln dust using microalgae

机译：利用微藻优化水泥窑粉尘的生物水泥生产

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class="kwd-title">Keywords: CaCO3 precipitation, Bio-cement, Microalgae, Optimization, Waste management class="head no_bottom_margin" id="abs0015title">AbstractThe main aim of this study was to maximize bio-cement (CaCO3) production through a waste feedstock of cement kiln dust (CKD) as a source of calcium by deployment of microalgae sp. Chlorella kessleri. The effect of process parameters such as temperature, pH and time-intervals of microalgae cultivation, were set as criteria that ultimately subscribe to a process of optimization. In this regard, a single factor experiments integrated with response surface methodology (RSM) via central composite design (CCD) was considered. A quadratic model was developed to predict the maximum CaCO3 yield. A ceiling of 25.18 g CaCO3 yield was obtained at an optimal set of 23 °C, pH of 10.63 and day-9 of microalgae culture. Under these optimized conditions, maximum 96% calcium was extracted from CKD. FTIR, XRD and EDS analyses were conducted to characterize the CaCO3 precipitates. Compressive modes of mechanical testing seemed to hold conventional cement complimented by CaCO3 co-presence markedly superior to mere cement performance as far as compressive strength is concerned. The latter criterion exhibited further increase in correspondence with rise in cement to bio-cement ratio. This investigative endeavour at hand offers a simple pivotal platform on the basis of which a scale-up of microalgae-infested bio-cement production might be facilitated in conjunction with the added benefit of alleviation in environmental pollution through cement waste utilization.
机译：<！-fig ft0-> <！-fig @ position =“ anchor” mode =文章f4-> <！-fig mode =“ anchred” f5-> <！-fig / graphic | fig / alternatives / graphic mode =“ anchored” m1-> class =“ kwd-title”>关键字： CaCO3沉淀，生物水泥，微藻类，优化，废物管理 class =“ head no_bottom_margin” id =“ abs0015title”>摘要这项研究的主要目的是通过利用微藻sp部署水泥窑粉尘（CKD）废料作为钙的来源来最大程度地生产生物水泥（CaCO3）。小球藻。将过程参数（例如温度，pH和微藻培养的时间间隔）的影响设置为最终参与优化过程的标准。在这方面，考虑了通过中心复合设计（CCD）与响应面方法（RSM）集成的单因素实验。开发了一个二次模型来预测最大CaCO3产量。在最佳温度为23°C，pH为10.63和第9天进行微藻培养的条件下，最高碳酸钙产量为25.18μg。在这些优化的条件下，从CKD中提取了最多96％的钙。进行了FTIR，XRD和EDS分析以表征CaCO3沉淀物。在抗压强度方面，机械测试的压缩模式似乎使传统水泥得到了CaCO3共存的补充，明显优于单纯的水泥性能。后一种标准显示出随着水泥与生物水泥比的增加而进一步增加。手头的这项研究工作提供了一个简单的关键平台，在此平台的基础上，可以促进微藻侵染的生物水泥生产的规模化，以及通过水泥废物利用减轻环境污染的额外好处。

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