Abstract The work relates to assessing the ability of the microwave for dehydration of large amount of waste hydrous ferrous sulfate generated from the titanium pigment process industry. The popular process optimization tool of response surface methodology with central composite design was adopted to estimate the effect of dehydration. The process variables were chosen to be power input, duration of heating and the bed thickness, while the response variable being the weight loss. An increase in all the three process variables were found to significantly increase the weight loss, while the effect of interaction among the parameters were found to be insignificant. The optimized process conditions that contribute to the maximum weight loss were identified to be a power input of 960 W, duration of heating of 14 min and bed thickness of 5 cm, resulting in a weight loss of 31.44%. The validity of the optimization process was tested with the repeat runs at optimized conditions.

中文翻译：

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响应面法优化微波加热脱水硫酸亚铁

摘要 这项工作涉及评估微波对钛颜料加工业产生的大量废水合硫酸亚铁的脱水能力。采用具有中心复合设计的响应面方法的流行工艺优化工具来估计脱水效果。过程变量被选择为功率输入、加热持续时间和床层厚度，而响应变量是重量损失。发现所有三个过程变量的增加都显着增加了重量损失，而发现参数之间相互作用的影响微不足道。有助于最大重量损失的优化工艺条件被确定为输入功率为 960 W，加热持续时间为 14 分钟，床层厚度为 5 cm，导致体重减轻 31.44%。通过在优化条件下重复运行来测试优化过程的有效性。