海绵铁和陶粒填料生物膜净化微污染河水实验研究

发布时间：2018-04-04 19:19

本文选题：海绵铁填料　切入点：陶粒填料　出处：《水处理技术》2017年11期

【摘要】：以海绵铁和陶粒为填料进行生物膜原位净化城市微污染河水的效果研究,考察了2种填料分别在饱和DO和低DO含量条件下,以及海绵铁在低DO含量条件下减小HRT和陶粒在无曝气条件下,对NH_4~+-N、TN、TP和COD的处理效果和填料的筛选并探讨了机理。结果表明,增大曝气能保证DO含量饱和,但会对生物膜产生冲击而影响载体表面生物膜量。陶粒和海绵铁分别在第23天和第56天挂膜成功,陶粒比海绵铁挂膜速度快得多。为防止海绵板结现象,可将海绵铁按40%的体积填充率分散装入直径9 cm左右的网状聚酯纤维球内。海绵铁在持续运行期间去除效果总体优于陶粒,在低DO含量条件下更适合用来改善河水水质。
[Abstract]:Using sponge iron and ceramsite as fillers, the effect of biofilm on in-situ purification of urban micro-polluted river water was studied. The two fillers were investigated under the condition of saturated do and low do content, respectively.Under the condition of low do content, sponge iron can reduce HRT and ceramsite in the condition of no aeration. The treatment effect of NH _ 4- N _ (N) -TNN _ (TP) and COD and the screening of fillers are discussed.The results show that the increase of aeration can ensure the saturation of do content, but it will impact the biofilm and affect the amount of biofilm on the surface of carrier.Ceramsite and sponge iron were successfully hanged on the 23rd and 56th day, respectively, and the rate of hanging film was much faster than that of spongy iron.In order to prevent sponge plate formation, sponge iron can be dispersed into the reticulated polyester fiber ball with a diameter of 9 cm or so according to 40% volume filling ratio.The removal effect of sponge iron is better than that of ceramsite in the process of continuous operation, and it is more suitable for improving the water quality of river water under the condition of low do content.
【作者单位】：西安科技大学建筑与土木工程学院;环境保护部华南环境科学研究所;中日友好环境保护中心;
【基金】：国家水体污染控制与治理科技重大专项(2015ZX07204-002)
【分类号】：X52

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