湖南低温地区人工湿地基质的筛选及基质堵塞性能研究  

Selection on Efficiency of Compound Substrate and Plugging Performance of Constructed Wetland in Cold Climate of Hunan

作　　者：刘珂[1,2] 葛大兵[1,2] 徐丽[1,2] 田雄[1,2] 任森华[1,2] 

机构地区：[1]湖南农业大学生态研究所,湖南长沙410128 [2]湖南农业大学生物科学技术学院,湖南长沙410128

出　　处：《环境科技》2013年第4期5-8,共4页Environmental Science and Technology

基　　金：宁乡县国家级生态县建设研究及其规划项目资助(2011-NX128)

摘　　要：针对人工湿地技术在湖南寒冷低温地区所遇到的问题,实验选取石英砂、无烟煤和粉煤灰作为人工湿地填料,对3种基质和不同质量配比基质在不同温度条件下进行了吸附试验并对其去除氨氮、磷效果进行了研究比较筛选出最优配比基质;并对最优配比基质进行堵塞性能研究。结果表明:低温情况下,对于基质对氨氮吸附是有一定影响的,但同时无烟煤的吸附率仍然是最高的,达到65.8%,对于磷的去除效果表现得与恒温情况基本一致,只有少量的去除率下降,组合质量比例对氨氮的去除率都大于单一基质对氨氮的去除率,WL112配比基质对于氨氮、磷在恒温、低温情况下都具有良好稳定的去除率,试验筛选出WL112最优配比基质,即石英砂-粉煤灰-无烟煤以质量比1∶1∶2混合,为最优配比填料基质。WL112作为湿地填料基质最佳运行周期为20 d,在停止进水的情况下,8 d后可以快速恢复其有效孔隙率。Based on the problems of using artificial wetland technology in the winter cold in Hunan province, quartz sand,anthracitic coal and fly ash were selected as wetland filtering media, which were measured by method of adsorption test. The effect of removing ammonia nitrogen and P with different packing ratio was studied. Substrate with the optimal efficiency was selected. Results showed that under the low temperature experimental conditions,the substrate adsorption of ammonia nitrogen was effected, but the adsorption rate of anthracitic coal was the highest, up to 65.8%, the adsorption rate of P was as same as constant temperature experimental; the WLll2, which is mixed by quartz sand,fly ash and anthracitic coal at the mass ratio of 1 ： 1 ： 2, was selected as the best substrate with the optimal efficiency. The best operating cycle of WL112 was 20 days, in the case of no water coming into the wetland, it can recover its effective porosity after 8 days.

关 键 词：人工湿地 基质配比 堵塞性能 

分 类 号：X7[环境科学与工程—环境工程]