论文部分内容阅读
对于暴雨期东江突发性高污染原水,在东莞某水厂采用高速给水曝气生物滤池(HUBAF)进行强化生物预处理中试研究,滤速16 m/h,气水体积比0.5:1。结果表明,在原水氨氮质量浓度较低时,试验系统最终出水氨氮相对于原水的去除率高达90.63%,同期水厂出厂水仅为64.06%。在原水氨氮质量浓度突发性升高时,采用硝化菌促生强化生物预处理技术,HUBAF对高氨氮污染能够及时发挥其生物净化作用,在2次氨氮高峰期间,相对于原水的氨氮去除率分别为89.80%和90.28%,中试系统出水氨氮含量远低于水厂出水。滤池采用气水联合反冲洗,冲洗前后过滤水头变化量<1.0 kPa,反冲洗周期可达72 h,氨氮、CODMn等指标出水完全符合《生活饮用水卫生标准》(GB5749-2006)要求。
For the sudden and unexpectedly high water pollution in the Dongjiang River during the heavy rainstorm, a pilot bio-pretreatment study was conducted in a water plant in Dongguan with a high-speed feedwater biological aerated filter (HUBAF). The filtration rate was 16 m / h and the volume ratio of gas to water was 0.5: 1 . The results show that when the concentration of ammonia nitrogen in raw water is low, the removal rate of ammonia nitrogen from the final effluent of the test system is up to 90.63% compared with that of raw water, while the effluent from the factory is only 64.06%. When the concentration of ammonia nitrogen in raw water increased unexpectedly, nitrifying bacteria was used to promote bioconcentration and biological pretreatment. HUBAF could exert its biological purification on high ammonia nitrogen pollution in time. During the second peak of ammonia nitrogen, ammonia nitrogen removal rate Respectively, 89.80% and 90.28%, pilot plant effluent ammonia nitrogen content is far lower than the water plant effluent. The filter adopts air-water combined backwashing. The change of the filtered head before and after the flushing is less than 1.0 kPa and the backwashing period is up to 72 hours. The effluent of indicators such as ammonia nitrogen and CODMn fully meets the requirements of Health Standards for Domestic Drinking Water (GB5749-2006).