给水管网管壁铁细菌生长特性模拟及控制对策研究 | |
王洋 ; 张晓健 ; 陈雨乔 ; 陆品品 ; 陈超 ; WANG Yang ; ZHANG Xiao-jian ; CHEN Yu-qiao ; LU Pin-pin ; CHEN Chao | |
2010-06-10 ; 2010-06-10 | |
关键词 | 铁细菌 给水管网 生长特性 腐蚀控制 余氯 iron bacteria drinking water distribution system growth characteristics corrosion control chlorine residual TU991.25 |
其他题名 | Growth Characteristics and Control of Iron Bacteria on Cast Iron in Drinking Water Distribution Systems |
中文摘要 | 利用AR反应器对管壁铁细菌的生长特性、影响因素以及悬浮铁细菌与管壁铁细菌的相关关系进行了研究.管壁铁细菌在反应器运行12 d后达到稳定生长,出水中铁细菌数量比进水增加1 lg,剪切力对于铁细菌达到稳定生长的时间有影响,但对稳定生长后挂片上的铁细菌数量没有明显的影响.稳定余氯0.3 mg/L可以有效控制悬浮和管壁铁细菌的生长,数量降低1 lg;对于管垢内的铁细菌即使余氯增加到1.0 mg/L仍无法杀灭;余氯浓度0.05 mg/L无法有效控制悬浮和管壁附着铁细菌的生长.对于稳定生长下的管壁铁细菌,增加余氯浓度至1.25 mg/L,可使管壁铁细菌数量降低2 lg~3 lg.稳定生长状态下,悬浮铁细菌与管壁铁细菌数量具有线性关系.并在试验基础上提出给水管网铁细菌生长控制对策:维持管网余氯0.3 mg/L;定期采用较高浓度消毒剂冲洗管道;采用新型防腐管材或加快旧管网改造,提高管网抗腐蚀性能等.; This study investigated the growth characteristics of iron bacteria on cast iron and relationship between suspended and attached iron bacteria.The steady-state growth of iron bacteria would need 12 d and iron bacteria level in effluents increased 1 lg.Hydraulics influence on iron bacteria level and detachment rate of steady-state attached iron bacteria was not significant.But it could affect the time of attached iron bacteria on cast-iron coupons reaching to steady state.When the chlorine residual was 0.3(mg/L),the iron bacteria growth could be controlled effectively and suspended and attached iron bacteria levels both decreased 1 lg.When the chlorine residual was more than 1.0(mg/L),it could not inactivate the iron bacteria of internal corrosion scale yet.There was little effect on inhibiting the iron bacteria growth that the chlorine residual was 0.05(mg/L) in drinking water quality standard of China.The iron bacteria on coupons reached to steady state without disinfectant and then increased the chlorine residual to 1.25(mg/L),the attached iron bacteria level could decrease 2 lg to 3 lg.Under steady-state,the suspended iron bacteria levels were linearly dependent on the attached iron bacteria.The control of iron bacteria in drinking water distribution systems was advanced: maintaining the chlorine residual(0.3(mg/L)),flushing the pipeline with high dosage disinfectant,adopting corrosion-resistant pipe materials and renovating the old pipe loop.; 国家自然科学基金项目(50578081); 国家高技术研究发展计划(863)项目(2006AA06Z301) |
语种 | 中文 ; 中文 |
内容类型 | 期刊论文 |
源URL | [http://hdl.handle.net/123456789/65784] |
专题 | 清华大学 |
推荐引用方式 GB/T 7714 | 王洋,张晓健,陈雨乔,等. 给水管网管壁铁细菌生长特性模拟及控制对策研究[J],2010, 2010. |
APA | 王洋.,张晓健.,陈雨乔.,陆品品.,陈超.,...&CHEN Chao.(2010).给水管网管壁铁细菌生长特性模拟及控制对策研究.. |
MLA | 王洋,et al."给水管网管壁铁细菌生长特性模拟及控制对策研究".(2010). |
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