紫外線預(yù)處理城市給水高藻水的試驗(yàn)研究.pdf

1、華中科技大學(xué)碩士學(xué)位論文紫外線預(yù)處理城市給水高藻水的試驗(yàn)研究姓名：樊杰申請學(xué)位級別：碩士專業(yè)：市政工程指導(dǎo)教師：陶濤20051101華 中 科 技 大 學(xué) 碩 士 學(xué) 位 論 文 IIAbstract Based on summery of algae removal technology both home and overseasultraviolet- c was adopted to pre- treat the water

2、from East Lake of Wu Han. The results show that: (1). Ultraviolet- c is valid to pre- treat the algae- laden water, 2.5mW/cm2 shine 6 min can reach equal effect with pre- chlorination after floatation

3、. (2). Intensity and time both have an effect on algae removal rate. Increasing intensity can improve algae removal rate. But when intensity slightly increased algae removal rate is not rised

4、all the time but has a breakpoint. (3).After radiation of UV turbidity rises slightly DO ,CODMn and pH all reduce.Turbidity rising is due to algae pieces. DO reducing is due to produce of ROS. COD reducing is due t

5、o UV oxidation. UV can infect algae’s activation,and release CO2,so pH reduces. (4).Ultraviolet radiation can decrease the consistency of microcystin- LR in original water 500 ìW/cm2 is better than 2500ìW

6、/cm2,because with higher intensity, algae cell will break and release more cystic microcystin. (5).With UV thchnology, chlorine amount and reaction time are both lower in the whole treatment and the point

7、 of chlorine reaction is also changed, so that consistency of chloroform is lower than pre- chlorination technology.After ultraviolet pre- treatment, consistency of chloroform is undetectable but peak area of c

8、hloroform is increased. it is due to product’s activation. The innovation of the paper is that: operative experiment of UVC in water supply treatmenmt for algae pretreatment is for the first time.Divide UV