微纳米曝气技术处理黑臭河道废水的研究.docxVIP

微纳米曝气技术处理黑臭河道废水的研究 王美丽 1,2，袁震 2，何连生 2*，邢云鹏 1，刘春 1，白雪梅 2 （1.河北科技大学，石家庄，050018；2.中国环境科学研究院，北京，100012） 摘要：采用国产微纳米气泡发生装置，对比研究不同的曝气量对黑臭河道废水的 处理效果。进气量分别设为 0.2L/min，0.3L/min 和 0.4L/min 三种不同的进气量， 监测的出水水质指标包括异味物质（土臭素），COD，氨氮，TP 和浊度。结果显 示，0.3L/min 的气量下，90min 时 DO 达到最大值 11.96mg/L，是初始值的 5.8 倍。三种气量相比，0.3L/min 的气量下，对污染物的去除效率高，在 90min 时， 去除率达到最大值，COD，氨氮，TP 和土臭素的去除率分别是 51.4%、55.8%、 31.0%和 48.3%。由于气体的扰动，三种气量下的曝气开始时浊度都有所增加， 90min 后才低于初始水平。虽然，0.4L/min 的气量比较大，但对污染物的去除却 不是最好。说明并不是气量越大对污染物的去除越好，由于气量大，气泡对废水 的搅拌越大，和污染物的接触时间比较短，去除的效果不高。因此，处理一定体 积的废水，适当的曝气量是个关键的问题。 关键词：微纳米气泡；曝气；溶解氧；黑臭废水处理 A study on black-odor river water treatment with Micro-nano bubble aeration technology Wang Meili1,2, Yuan Zhen2,He Liansheng2*,XingYunpeng1, Liu Chun1,Bai Xuemei2 （1. Hebei University of Science and Technology, Shi Jiazhuang, 050018, China; 2. Chinese Research Academy of Environmental Sciences, Beijing, 100012, China） +Abstract A microbubble generator produced domestically was used to treat the blac-odor river water. A comparison study on treatment efficiency between the different gas flow was carried out. Some important water quality indicators, including odorous chemicals(Geosmin),COD,NH3-N,TP and turbidity were monitored during the experimental period. The results showed that When the gas fiow is 0.3L/min, maximum DO level was 11.96mg/L in 90 min is 5.8 times the initial value. Comparison the three gas fiow， under 0.3L/min can reach a high pollutant removal efficiency in 90min, the maximum removal rate of COD, NH4 -N, TP and Geosmin were 51.4%, 55.8%, 31.0% and 48.3%，respectively. The turbidity values increased at + the beginning period because of the strong stirring from bubbles, and did not recover to their initial level until 90 min. Although, the gas flow of 0.4L/min is larger than others, but not as well as the removal of pollutants, because the larger the volume, the larger the bubble agitation of wastewater, pollutants and exposure time is short, so the effect of the removal is not high. Theref