基于单过硫酸氢钾复合粉的饮用水消毒研究

发布时间：2018-05-09 12:01

本文选题：单过硫酸氢钾复合粉 + 饮用水消毒　；参考：《湖南大学》2015年硕士论文

【摘要】：消毒工艺是饮用水处理核心工艺之一,选择一种广谱、高效、低毒的消毒剂具有非常重要的工程意义。单过硫酸氢钾复合粉是一种新型消毒剂,有着高效的杀菌能力,基本没有氯化副产物的产生。本文以长沙市二水厂砂滤工艺出水为试验水样,考察了单过硫酸氢钾复合粉的消毒效果及其可能产生的副产物。首先,基于DPD分光光度计法,研究了温度、光照和消毒剂浓度对其有效氯的影响。发现当消毒剂浓度一定时,随着温度的升高,有效氯峰值浓度不断增大,但增大的幅度较小。消毒剂中有效氯的浓度达到最大值的时间介于30min至1h之间,且高浓度的该消毒剂中有效氯浓度达到最大值的时间要快于低浓度。环境温度一定时,随着消毒剂浓度不断增大,其有效氯的浓度也不断增大,但增大的幅度不断减小。光照能够促进消毒剂中有效氯浓度增大,即加快其链式反应速度。其次,通过控制温度、光照和消毒剂浓度,考察了单过硫酸氢钾复合粉的消毒性能。发现随着消毒剂浓度增加和环境温度升高,试验水样中菌落总数和总大肠菌群的去除率不断增大。光照能够增强该消毒剂的消毒效果,即有光环境对以上两种菌的去除率比无光环境高约1~16%。经过12h反应,菌落总数的恢复率较低,总大肠菌群没有出现恢复,说明该消毒剂有着良好的持续消毒能力。接着,对该消毒剂产生的消毒副产物进行了测定,发现其消毒后基本不产生我们所已知的一些有毒副产物。最后,通过对比分析几种常见消毒方式的成本,认为该消毒剂在水耗、电费和人力成本方面具有一定优势。综上所述,单过硫酸氢钾复合粉有着良好的消毒杀菌效果,基本不产生我们所已知的副产物,随着不断推广使用,其药剂和设备成本势必会大幅降低,是未来较为理想的一种消毒方式。
[Abstract]:Disinfection is one of the core processes for drinking water treatment. It is of great engineering significance to select a broad spectrum, high efficiency and low toxicity disinfectant. Potassium hydrogen monosulfate compound powder is a new disinfectant with high germicidal ability and no chlorination by-products. In this paper, the disinfection effect of potassium hydrogen sulfate compound powder and its possible by-products were investigated with the sand filtration process of Changsha No. 2 Water Plant as the experimental water sample. Firstly, based on DPD spectrophotometer, the effects of temperature, light and disinfectant concentration on available chlorine were studied. It was found that when the concentration of disinfectant was constant, the peak concentration of available chlorine increased with the increase of temperature, but the range of increase was small. The time of maximum concentration of available chlorine in disinfectant was between 30min and 1h, and the time of maximum concentration of available chlorine in high concentration disinfectant was faster than that in low concentration. With the increasing of the disinfectant concentration, the available chlorine concentration of the disinfectant increases with the constant ambient temperature, but the increasing range is decreasing. Light can promote the increase of available chlorine concentration in disinfectant, that is, accelerate the chain reaction speed. Secondly, the disinfection performance of potassium bisulfate compound powder was investigated by controlling temperature, illumination and disinfectant concentration. It was found that with the increase of disinfectant concentration and environmental temperature, the total number of colonies and the removal rate of total coliform bacteria in the test water increased continuously. Light could enhance the disinfection effect of the disinfectant, that is, the removal rate of the above two bacteria in the light environment was about 110% higher than that in the non-light environment. After 12 h reaction, the recovery rate of the total number of bacteria was low, and the total coliform group did not recover, which indicated that the disinfectant had a good ability of continuous disinfection. Then, the disinfection by-products produced by the disinfectant were determined, and it was found that the disinfectant did not produce some known toxic by-products after disinfection. Finally, by comparing and analyzing the cost of several common disinfection methods, it is concluded that the disinfectant has some advantages in water consumption, electricity consumption and labor cost. To sum up, potassium persulfate composite powder has a good disinfection and sterilization effect, basically does not produce the by-products we know, with the continuous use, its pharmaceutical and equipment costs will be significantly reduced. It is an ideal way of disinfection in the future.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU991.25

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