摘要
临沂市地热资源丰富,开发历史悠久,已建成河东汤头、沂南铜井、沂南松山、沂水许家湖等四个温泉开发示范区。地热资源利用过程中会产生尾水污染,破坏地表环境,为实现地热尾水无害化排放,对地热尾水进行处理尤为关键。本文在对临沂市各个示范区温泉开发企业地热尾水特征调查基础上,对临沂市地热尾水排放的环境负效应进行分析,对比探讨地热尾水处理的合理方案。结果表明:临沂市地热资源开发利用形式以医疗、洗浴为主,利用形式单一,利用效率整体较低,高温尾水直接排放到天然水体,会迅速和天然水体进行热量交换和物质弥散,引起河流水温升高、水质变化、影响生物生长、破坏局部水生态平衡,造成热污染;会引起化学污染,间接引发土壤化学成分的改变;参考已有地热尾水处理的典型案例,认为临沂地区地热水矿化度高、组分复杂,地热尾水化学-生物复合处理方案在沂南铜井温泉示范区已取得较好应用,具有推广意义。
Linyi is rich in geothermal resources and has a long history of development.Four model hot spring development areas have been built,including Tangtou in Hedong,Tongjing in Yinan,Songshan in Yinan and Xujiahu in Yishui.The use of geothermal resources can produce tailwater pollution and damage the surface environment,so it is particularly crucial to treat geothermal tailwater in order to achieve a harmless discharge.This paper analyses the negative environmental effects of geothermal tailwater discharge in Linyi on the basis of a survey of the characteristics of geothermal tailwater from hot spring development enterprises in various demonstration zones in Linyi,and compares and discusses reasonable options for geothermal tailwater treatment.The results show that the development and utilization of geothermal resources in Linyi is mainly in the form of medical treatment and bathing,with a single form of utilization and an overall low utilization efficiency,and that the direct discharge of high-temperature tailwater into natural water bodies will rapidly exchange heat and disperse materials with natural water bodies,causing an increase in river water temperature,changes in water quality,affecting biological growth,destroying the local water ecological balance and causing thermal pollution;It will cause chemical pollution and indirectly lead to changes in soil chemical composition;with reference to existing typical cases of geothermal tailwater treatment,it is considered that the geothermal water in Linyi is highly mineralized and has complex components,and the chemical-biological composite treatment scheme for geothermal tailwater has been well applied in the Tongjing Hot Spring Demonstration Area in Yinan,which has significance for promotion.
作者
刘连
冷旭勇
李庆义
许洪芳
孙国权
李婷婷
LIU Lian;LENG Xu-yong;LI Qing-yi;XU Hong-fang;SUN Guo-quan;LI Ting-ting(Shandong First Geological and Mineral Exploration Institute,Jinan,Shandong 250010,China;Engineering Laboratory for the Development of Iron-rich Ore Exploration Technology,Shandong Province,Jinan 250010,China;Natural Resources and Planning Bureau,Linyi City,Shandong Province,China 276301)
出处
《地下水》
2023年第3期26-28,共3页
Ground water
关键词
临沂市
地热尾水
环境负效应
处理方案
Linyi city
Geothermal tailwater
Negative environmental effects
Treatment options
