扬水曝气器对水源水库水质改善及沉积物控制

发布时间：2018-03-02 00:08

本文关键词： 原位沉积物释放耗氧速率扬水曝气系统原位改善　出处：《中国环境科学》2017年01期 　论文类型：期刊论文

【摘要】：研究了分层型深水水库(金盆水库)水体和沉积物的耗氧速率及沉积物原位释放状况,以及扬水曝气系统运行对水体和沉积物的原位改善效果.原位测定结果表明,金盆水库水体和沉积物耗氧速率处于较高水平分别为0.106~0.132mg/(L·d)和0.358~0.410mg/(L·d).在480h内,主库区沉积物Fe、TOC、TN和TP最大释放浓度达到2.3~2.7,4.4~5.2、3.0~3.3和0.165~0.224mg/L.扬水曝气系统运行时期,对作用区域水质和沉积物原位改善结果表明,水体中Fe、TOC、TN和TP浓度削减率分别达到78.6%、22.9%、47.8%和66.7%,其在沉积物中的浓度削减率分别为8.7%、17.4%、18.0%和17.4%.Biolog测定结果表明扬水曝气系统运行过程中,水体和表层沉积物的微生物活性都得到了增强.扬水曝气器系统是深水水库水质和沉积物原位改善的有效技术,且其现场应用已取得显著效果.
[Abstract]:The oxygen consumption rate and in situ release of sediment in water and sediment of layered deep water reservoir (Jinpan reservoir) were studied, and the effect of aeration system of raising water on in situ improvement of water body and sediment was also studied. The oxygen consumption rates of water body and sediment in Jinpan Reservoir were 0.106 mg / L 路d and 0.358N 0.410 mg / L 路d respectively. Within 480 hours, the maximum release concentrations of FetoCTN and TP in sediment of Jinpan Reservoir reached 2.32.74.45.23.03.3,0.165 ~ 0.224mg / L 路L ~ (-1), respectively. The aeration system of the main reservoir was operated in the period of 0.224mg 路L ~ (-1), the maximum release concentration of FetoCTN and TP was 2.32.74.45.23.03.3 and 0.165 ~ 0.224mg / L 路d ~ (-1), respectively. The results of in-situ improvement of water quality and sediment in the affected area show that the reduction rates of FetoCTN and TP concentrations in water reach 78.6% and 22.9% and 66.7%, respectively. The concentration reduction rates of FetoCTN and TP in sediments are 8.7% 17.440% and 17.4% respectively. Biolog test results show that during the operation of the aeration system, The microbial activity of both water body and surface sediment has been enhanced. The aerator system is an effective technique for the improvement of water quality and sediment in situ in deep water reservoir, and its field application has achieved remarkable results.
【作者单位】：西安建筑科技大学环境与市政工程学院;
【基金】：国家自然科学基金资助项目(51478378)
【分类号】：X524

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