低pH下饮用水生物除铁试验研究

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任文辉，余健，郭照光，禹丽娥
9 S! H+ b$ _! ]4 y% X( B; J/ K(湖南大学土木工程学院，湖南长沙410082)
【摘要]通过试验，探讨了低pH条件下饮用水生物滤池除铁的效果及其证据。结果表明，当pH为5．7—5．9，水温
为25 28 。DO为0．7 1．5 mg／L，EBCT为7．5 min时，生物滤池具有良好的除铁效果；在生物除铁滤池内，滤层除
" ]/ t. ?  Y6 w; |铁机理主要为生物氧化作用。
[关键词]饮用水；生物滤池；除铁；生物氧化
[中图分类号]TU991．2 [文献标识码]A [文章编号]1005—829X(2007)01—0055—03
% m7 {; L; Q0 D3 A9 p1 }* yExperimental research 0f biological removal of iron in drinking
% h/ ^5 ^6 F) P& `. V) Kwater under IOw pH condition
Ren Wenhui，Yu jian，Guo Zhaoguang，Yu Li’e
* u* u" a1 x4 E+ ], \1 u: q(College ofCivil Engineering，Hunan University，Changsha 410082，China)
& u/ u8 [9 A; j+ [3 q! [% _; yAbstract：Through some experiments，iron removal by the biological filter has been studied，and the mechanism
9 f: |8 L9 k% {0 oof iron removal has been investigated under low pH condition．When pH is 5．7—5．9，water temperature is 25—
6 K3 w) d1 z) P/ U' ]* ]: ^28 qC，DO is 0．7—1,5 mg／L，and EBCT is 7．5 min，the biological fiher has good effect On iron removal。In the
biological filter the mechanism of iron removal of filter layer mainly is biological oxidation action．
Key words：drinking water；biological filter；iron removal；biological oxidation
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