海绵铁和陶粒填料生物膜净化微污染河水实验研究  

Experimental Research of Micro-polluted River Water Purification by Sponge Iron/Ceramsite Filler Biofilm

作　　者：万琼[1] 吴仪 王信[1,2] 吴英海[2] 魏东洋[2] 姜琦[3] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054 [2]环境保护部华南环境科学研究所,广东广州510655 [3]中日友好环境保护中心,北京100029

出　　处：《水处理技术》2017年第11期34-40,共7页Technology of Water Treatment

基　　金：国家水体污染控制与治理科技重大专项(2015ZX07204-002)

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。The research of micro-polluted river water purification by in-situ biofilm technology was carried out with sponge iron and ceramsite as the filler. Two kinds of fillers on the treatment effect of （NH4^＋-N）, total nitrogen （TN）, total phosphorus （TP） and chemical oxygen demand （COD） under the conditions of saturated dissolved oxygen （DO） and low DO, as well as sponge iron under reduced hydraulic retention time （HRT） at low DO conditions and ceramsite under the absence of aeration conditions, and the preliminary mechanism analysis and the screening of the filler were discussed. The results showed that, increasing aeration could provide the saturation of DO, but it could impact the biofilm and biomass on the carrier surface. The ceramsite and sponge iron had formed film successfully during 23 days and 56 days respectively, ceramsite was faster than sponge iron. In order to prevent the compaction of sponge, sponge iron could load to mesh polyester ball of 9 cm diameter with 40% volume ratio. Sponge iron in the continuous operation of the removal effect was overall better than ceramsite, and it was more suitable to improve the river water quality under the low DO conditions.

关 键 词：海绵铁填料 陶粒填料 原位净化 微污染河水 DO HRT 

分 类 号：X522[环境科学与工程—环境工程]