Cyanide removal by ozone oxidation in tapioca starch industrial wastewater for recycling purposes : effects of pH and starch concentration
Cyanide removal by ozone oxidation in tapioca starch industrial wastewater for recycling purposes : effects of pH and starch concentration
复制标题
木薯淀粉工业废水中臭氧氧化去除氰化物用于回收利用：pH值和淀粉浓度的影响
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
W. Songkasiri
中科院分区：
文献类型：
--
作者：
Wutthi Khongkittikhoon;R. Lerdlattaporn;M. Nopharatana;W. Songkasiri
研究了pH值和木薯淀粉浓度对臭氧氧化去除木薯淀粉生产循环水中氰化物的影响。废水回用和再循环是降低工业运营成本的一种有吸引力的替代方案。使用在柱底部配备有气体分布器的丙烯酸类柱反应器作为反应器。实验在总氰化物浓度为30 ppm和臭氧（O3）生成速率为10.0，15.0，20.0克O3小时。测定了液相体积传质系数（kLa）和平衡臭氧浓度（* 3O）。在pH 4、5、6和7时，kLa值分别在3.17±0.03 min、2.97±0.06 min、2.48±0.13 min和2.05±0.03 min范围内。* 在酸性pH值下，O3产生速率增加，3O增加。在pH 5、6和7时，氰化物被O3迅速氧化并进入平台期。
This research investigated the effects of pH and tapioca starch concentration on cyanide removal by ozone oxidation in recycling water of the tapioca starch production process. Wastewater reuse and recycle is an appealing alternative for the reduction of industrial operating costs. An acrylic column reactor equipped with a gas sparger located at the bottom of the column was used as a reactor. Experiments were performed at the total cyanide concentration of 30 ppm and ozone (O3) generation rates of 10.0, 15.0, 20.0 g O3 h. The liquid phase volumetric mass transfer coefficient (kLa) and equilibrium ozone concentration ( * 3 O ) were determined. The values of kLa were in the ranges of 3.17±0.03 min, 2.97±0.06 min, 2.48±0.13 min, and 2.05±0.03 min at pH 4, 5, 6 and 7, respectively. * 3 O increased when O3 generation rates increased at acidic pH values. At pH 5, 6, and 7, cyanide was rapidly oxidized by O3 and became plateau.