砂滤工艺处理西北黄土塬地区集雨水石英砂改性及滤速选定试验
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摘要
对处理西北黄土塬地区集雨水砂滤工艺的石英砂滤料进行了改性试验,同时进行了滤速的选定试验。通过改性滤料对COD_(Cr)的去除率确定改性剂(三氯化铁)的最佳浓度、改性滤料在烘箱中被搅拌的最佳次数、最佳焙烧温度及最佳焙烧时间,确定了最佳改性条件下表面覆膜物质含量及氧化膜的附着强度。试验结果表明:改性剂浓度为2 mol/L,无搅拌,焙烧温度为550℃,焙烧时间为3 h时,所得到的改性滤料对集雨水COD_(Cr)的去除效果最好;最佳改性条件下表面覆膜物质的含量为2.14mg/g,其在酸性和机械震荡条件下的脱附率分别为0.551%、0.119%。在砂滤滤速的选定试验中,通过对不同滤速下,出水的浊度和总产水量分析,选定了最佳滤速为6 m/h。
Experiment on quartz sand modification and filtration rate selection for removing the contaminant from rain water in northwest loess tableland area was carried out. The optimal concentration, stirring number calcinations temperature and time of the modifier( FeCl_3) were determined by COD_(Cr) removing rate. Concentration and adhesion strength of the material covering quartz sand were measured under the optimal modification conditions. Results turned out that the optimal modification concentration was 2 mol/L,no stirring, calcinations temperature was 550℃, and calcinations time was 3 h. The content of surface coating material was2.14 mg/g, and desorption rates were 0.551% and 0.119% under the condition of acid and mechanical shock. The optimal filtration rate was determined to be 6 m/h,through the analysis of effluent turbidity and periodic total water quantity by different filtration rate.
Experiment on quartz sand modification and filtration rate selection for removing the contaminant from rain water in northwest loess tableland area was carried out. The optimal concentration, stirring number calcinations temperature and time of the modifier( FeCl_3) were determined by COD_(Cr) removing rate. Concentration and adhesion strength of the material covering quartz sand were measured under the optimal modification conditions. Results turned out that the optimal modification concentration was 2 mol/L,no stirring, calcinations temperature was 550℃, and calcinations time was 3 h. The content of surface coating material was2.14 mg/g, and desorption rates were 0.551% and 0.119% under the condition of acid and mechanical shock. The optimal filtration rate was determined to be 6 m/h,through the analysis of effluent turbidity and periodic total water quantity by different filtration rate.
引文
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[3]车伍,刘燕,李俊奇.国内外城市雨水水质及污染控制[J].给水排水,2003,29(10):38-41.
[4]包彩霞,常青,未碧贵.石英砂滤料表面润湿改性[J].环境工程学报,2014,8(5):1915-1920.
[5]李思敏,高沛,吕永康.改性石英砂生物滤池深度处理污水厂二级出水[J].中国给水排水,2015,31(9):104-108.
[6]包彩霞,未碧贵,常青.硅烷偶联剂对石英砂滤料的表面改性[J].中国环境科学,2013,33(5):848-853.
[7]李满,赵磊,钟振堃.改性石英砂滤料在水处理中的应用[J].水科学与工程技术,2007(3):62-64.
[8]马军,盛力,王力宁.改性石英砂滤料强化过滤处理含藻水[J].中国给水排水,2002,18(10):9-11.
[9]李满,赵磊,钟振堃.改性石英砂滤料在水处理中的应用[J].水科学与工程技术,2007(3):62-64.
[10]张奔,张克峰,王小.煤砂双层滤料滤池的运行与水处理性能[J].净水技术,2016,35(1):70-76.
[11]杨晓妮,杨浩,陈英.西北黄土塬地区集雨水的混凝沉淀优选试验研究[J].干旱区资源与环境,2016,30(1):101-106.
[12]谢群,陈士明.微絮凝变孔隙深层过滤处理低浊度废水研究[J].南昌航空工业学院学报(自然科学版),2005,19(2):38-41.
[13]范荣桂,朱东南,邓岚.微絮凝直接过滤工艺处理微污染矿井水的研究[J].水资源与水工程学报,2012,23(2):29-32.
[14]徐姮,陆少鸣,江荻,等.前砂滤池在生物活性炭净水工艺中效果研究[J].水处理技术,2016,42(4):84-86.