低硅铁尾矿多孔陶粒的制备及污水处理效果  

Preparation of Porous Ceramsite with Low Silica Iron Tailings and Its Effects in Sewage Water Treatment

作　　者：王德民[1] 宋均平[2] 刘博华[2] 雷国元[1] 刘署[2] 罗文斌[2] 程易金[2] 

机构地区：[1]武汉科技大学资源与环境工程学院 [2]武汉钢铁(集团)矿业有限责任公司

出　　处：《金属矿山》2012年第12期148-152,共5页Metal Mine

摘　　要：以某低硅铁尾矿为主要原料制备出了尾矿添加量达77%的多孔陶粒,并通过试验室曝气生物滤柱考察了所制备陶粒对模拟生活污水的处理效果。结果表明:该陶粒表面粗糙,内部多孔,表观密度、显气孔率和平均孔径分别为1.33 g/cm3、54%和19.80μm,重金属浸出试验浸出液中的重金属浓度符合国家地表水环境质量标准。以该陶粒为滤料的曝气生物滤柱对模拟污水的处理效果良好,CODCr、NH4+-N、TN的去除率分别为84.26%、84.01%和25.87%;滤柱内陶粒上附着的微生物种类丰富,进水端单位质量陶粒上的生物脂磷总量可达371.63nmol/g,陶粒表面和内部分别占90.79%和9.21%。The porous ceramsite with tailings addition of 77% was prepared with low silica iron tailings as raw materials.And the effect of the prepared ceramsite on the sewage water treatment was investigated through biological aerated filter at laboratory.The results showed that since the ceramsite has features of surfaces roughening,internal porous and the apparent density,the apparent porosity and the average pore diameter of 1.33 g/cm^3,54% and 19.80 μm respectively,the concentration of heavy metals in leaching solution in heavy metals leaching tests reached the national environmental quality standards for surface water.The biological aerated filter with the ceramsite as filter has a good effect on treating the sewage in simulation,with the removal rate of CODCr,NH＋4-N and TN of 84.26%,84.01% and 25.87% respectively;There are numerous microbial species on the ceramsite filter,and total biological phospholipid per unit of ceramiste mass can be up to 371.63 nmol/g at water inlet,and 90.79% and 9.21% at ceramiste＇s surface and interior respectively.

关 键 词：低硅铁尾矿 多孔陶粒 曝气生物滤柱 生活污水处理 生物相 

分 类 号：X705[环境科学与工程—环境工程]