西江下游水源水质与水厂关联预警研究

发布时间：2018-06-10 19:16

  本文选题：预警 + 水源水质　； 参考：《湖南大学》2015年硕士论文

【摘要】：随着地表水源水质的日益恶化及突发性水污染事件的不断发生,原水水质预警监测系统作为保障供水水质安全的有效性措施,目前已在国内外得到成功的应用和推广,而处于西江下游流域的某市关于水源水质安全预警研究还处于起步阶段。本论文以2014.02~2015.01为研究周期,对西江下游水源水质及某水厂常规处理工艺单元出水水质进行监测与分析,研究西江水源水质的变化规律及常规处理工艺对污染物的去除变化,在此基础上针对该水源水质提出污染物指标的预警水平,初步确定水质预警指标及预警监测点,为在西江下游流域建立大范围水质预警监测系统提供基础性研究,并对浊度、氨氮、COD_(Mn)等关键预警指标进行相应的应急措施试验研究,为水厂应对水源水质变化提供有效指导和科学调控。研究结果表明:(1)西江下游水源水质整体良好,基本上达到国家地表水环境质量标准(GB3838-2002)规定的Ⅱ类水质标准,超标指标主要是DO、COD_(Mn)、TN、氨氮等,藻类含量较高,土嗅素、2-MIB、二甲硫醚、二甲基三硫醚等嗅味物质偶有检出。水库水源水质整体优于西江水,TN、藻类个数、叶绿素a等指标含量较高;(2)从水质指标的季节性及垂直分层变化分析得知,水温、pH、电导率、藻类等指标季节性变化规律较明显,浊度、COD_(Mn)、TP、叶绿素a、藻类个数等指标分层现象较明显,均表现为下层水样较高特点;(3)从水质指标间相关性分析可知,有机物类、氮类、藻类、臭味物质等指标与常规指标(浊度、DO、水温、pH、电导率)存在一定的显著相关性,氮类形态间(氨氮、亚硝态氮、硝态氮)转化关系较明显,分别得出了西江水源COD_(Mn)、TN、氨氮、叶绿素a、2-MIB等指标的回归方程;(4)水厂常规处理工艺对浊度、TOC、UV254、COD_(Mn)、氨氮、亚硝态氮、叶绿素a等污染物的平均去除率分别在94.04%、21.34%、31.25%、33.9%、76.18%、88.21%、91.29%左右,而对氯化物、TN、DOC、臭味物质等污染物基本无去除效果;(5)初步确定西江下游源水预警指标为浊度、pH、DO、电导率、水温、总氮、COD_(Mn)、氨氮、叶绿素a,确定预警监测点为麻子冲水闸出水口、西江取水口、水厂进水口。
[Abstract]:With the deterioration of surface water quality and the occurrence of sudden water pollution events, the early warning and monitoring system of raw water quality, as an effective measure to ensure the safety of water quality, has been successfully applied and popularized at home and abroad. However, the early warning research on water quality safety in a city located in the lower reaches of Xijiang River is still in its infancy. In this paper, the water quality of water source in the lower reaches of Xijiang River and the effluent quality of a conventional treatment process unit in a water plant are monitored and analyzed with the period of January 1, 2014.02, and the change law of water quality of Xijiang River and the removal of pollutants by conventional treatment process are studied. On this basis, the early warning level of pollutant quality index is put forward, and the water quality early warning index and early warning monitoring point are preliminarily determined, which provides a basic research for the establishment of a large-scale water quality early warning monitoring system in the lower reaches of the Xijiang River, and the turbidity. In order to provide effective guidance and scientific control for water plant to deal with the change of source water quality, the corresponding emergency measures are tested and studied on the key early warning indexes, such as ammonia nitrogen, CODX, Mnn and so on. The results show that the water quality of the lower reaches of the Xijiang River is good as a whole, which basically meets the water quality standard of class 鈪，

本文编号：2004306