摘要
利用给水曝气生物滤池(UBAF)处理刘屋洲水源水,考察了不同陶粒粒径对氨氮、高锰酸盐指数的去除效果以及水头损失变化的影响。结果表明,陶粒3～5 mm的UBAF对氨氮、高锰酸盐指数的去除效果较高,但是其水头损失较大,且反冲洗前后水头损失变化偏大,不利于UBAF稳定运行。陶粒6～10 mm的UBAF运行状况良好,氨氮的去除率为73.8%,高锰酸盐指数的去除率为18.6%,滤池24 h过滤水头损失<0.4 m,反冲洗前后过滤水头损失变化量<5 cm。其出水氨氮和高锰酸盐指数均达到《生活饮用水卫生标准》(GB5749-2006),滤池的水头损失小,反冲洗前后也变化甚微。进一步的实验表明陶粒破碎会导致滤料粒径级配变化,使得水头损失增加。
Up biological aerated filter（UBAF） was applied for the treatment of source water in Liuwuzhou.Effect of media size on the variation of head loss as well as the removal efficiency of NH3-N and CODMn was evaluated.The results showed that UBAF with media size between 3 and 5 mm was suitable for the removal of NH3-N and CODMn.However,because of the great head loss which also varied significantly before and after back wash,this media size was not favorable for UBAF operation.UBAF with media size between 6 and 10 mm made good performance,and the removal efficiencies of CODMn and NH3-N were 73.8% and 18.6%,respectively,which meet the requirement of the Sanitary Standard for Drinking Water（GB5749-2006）.The head loss was low（below 0.4 m） after operating for 24 h.And the variation of head loss before and after back wash was minimal（below 5 cm）.Additional test demonstrated that media broken might result in the change of size gradation and the head loss increased subsequently.
出处
《环境工程学报》
CAS
CSCD
北大核心
2012年第5期1409-1412,共4页
Chinese Journal of Environmental Engineering
基金
国家"水体污染控制与治理"科技重大专项(2008ZX07423-002-1)
关键词
给水曝气生物滤池
陶粒粒径
水头损失
运行稳定性
up biological aerated filter（UBAF）
media size
head loss
operational stability
