扬水曝气技术在河道型深水水库水质原位修复中的应用

以西安市地表饮用水水源—黑河金盆水库为研究对象,采用扬水曝气技术修复其受污染原水水质。结果表明,该项技术应用于大水深水库水质原位修复改善是可行、有效的;在扬水曝气器混合充氧作用影响下,金盆水库季节性缺氧/厌氧状况得到遏制,底泥表层DO浓度均维持在2mg/L以上;沉积物中氮、磷、有机质等内源释放过程明显减弱,藻类繁殖生长受抑;出水水质中TP、NH3—N、CODMn、叶绿素a等指标浓度较2008年同期分别削减46.7%、69.5%、22.4%及53.6%,水质改善效果明显。

Application of the technology of water-lifting and aeration on water quality in-situ restoration in a deep channel reservoir

By taking the drinking water source of Xi’an City-Jinpen reservoir,which is located along the Heihe River,as the research object,the technology of water-lifting and aeration(TWLA) was used to improve the water quality of the polluted water source.The results showed that this technology could restore the water quality in reservoirs with great water depth effectively.Under the mixing oxygenation effects by water-lifting aerator,the seasonal anoxic/anaerobic condition in Jinpen reservoir was suppressed,and the bottom sludge surface level dissolved oxygen concentration was maintained above 2 mg/L.The releasing process of nitrogen,phosphorus and organic pollutants from sediments as well as algal growth were inhibited.The concentrations of total-phosphorus,ammonia-nitrogen,CODMn and chlorophyll-a were respectively reduced by 46.7%,69.5%,22.4% and 53.6% in the outlet water compared to the same period of 2008.The performance indicated that the water quality improvement by TWLA was significant.