高浓度溶氧水处理技术在某小型水库水质提升工程中的应用

Design of Water Quality Improvement Project for a Small Reservoir Water Source Area

《四川省沱江流域水环境保护条例》实施以来,为改善沱江流域水环境质量,四川省某市积极开展饮用水源地水质提升工程,全力保障饮用水安全。四川省某小(一)型水库内源污染严重,水体中COD、TN、TP等指标超标,呈富营养化状态,水质较差,为劣Ⅴ类,亟需治理。通过实施高效深层水体复氧工程对该水库进行内源污染治理,向水体中充入高浓度溶氧水,提高水库底泥溶解氧含量,促进水生生物和好氧菌复苏,恢复食物链平衡,进一步促进对营养物质的吸收、降解,增强了水体的自净能力,水质得到明显改善。工程完工后的水质监测数据表明,目标水库高锰酸盐指数、COD、BOD、NH_(3)-N、TP及TN含量平均去除率分别为38%、35%、40%、20%、72%和9%,水库水质已稳定达到GB 3838-2002《地表水环境质量标准》中Ⅲ类水质标准的要求。

Since the implementation of the regulations on Water Environmental Protection in The Tuojiang River Basin of Sichuan Province,a city in Sichuan province has actively carried out water quality improvement project for drinking water sources to ensure the safety of drinking water in order to improve the water environmental quality of the Tuojiang River Basin.A small(one)reservoir in Sichuan province has serious internal pollution,COD,TN,TP and other indicators in the water exceeded the standard,eutrophication and poor water quality,which is inferior to class Ⅴ,so it needs to be treated urgently.Through the implementation of high-efficiency deep water reoxygenation project,the internal pollution of the reservoir is controlled,high concentration dissolved oxygen water was injected into the water,the dissolved oxygen content of the reservoir sediment is improved,the recovery of aquatic organisms and aerobic bacteria is promoted,the balance of food chain is restored,the absorption and degradation of nutrients arefurther promoted,the self-purification capacity of the water body is enhanced,and the water quality is significantly improved.The average removal rates of permanganate index,COD,BOD,NH_(3)-N,TP and TN contents in target reservoir are 38%,35%,40%,20%,72% and 9%,respectively.The water quality monitoring data after the completion of the project shows that the water quality of the reservoir has reached the requirements of class Ⅲ water quality standard of surface water.