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首页> 外文会议>International Conference on Wetlands amp; Remediation Salt Lake City, Utah, November 16-17, 1999 >The apache wetland: design construction
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The apache wetland: design construction

机译：阿帕奇湿地：设计与建造

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A constructed treatment wetland was designed to remediate nitrate-contaminated groundwater and return it via recharge to an alluvial aquifer or as runoff to the nearby San Pedro River. The design establishes a favorable balance between regulatory remedial objectives and physical, environmental, and sociocultural conditions at the site. The project was undertaken as a remedial action addressing a groundwater media component of the Apache Powder Superfund Site in Cochise County, Arizona. The 4.4 ac wetland is designed to receive groundwater at a maximum rate of approximately 250 gal/min with dissolved nitrate concentrations up to 300 mg/1. Within a 7- to 10-day retention period, dissolved nitrate concentrations can be reduced to concentrations less than the federal drinking water Maximum Contaminant Level (MCL) of 10 mg/1. This reduction is achieved by typical biological denitrification in anoxic conditions produced by the breakdown of wetland detritus. Wetland construction was completed in 1997. The system is presently in an "establishment phase."
机译：设计了一个人工处理的湿地，用于修复受硝酸盐污染的地下水，并将其通过补给入冲积含水层或作为径流返回附近的圣佩德罗河。该设计在现场的法规补救目标与自然，环境和社会文化条件之间建立了良好的平衡。该项目是针对位于亚利桑那州科奇斯县Apache Powder Superfund网站的地下水介质部分的补救措施而进行的。 4.4 ac湿地的设计最大接收速度为250加仑/分钟，溶解硝酸盐浓度最高为300 mg / 1。在保留7到10天的时间内，可以将溶解的硝酸盐浓度降低到小于联邦饮用水最大污染物水平（MCL）10 mg / 1的浓度。这种减少是通过湿地碎屑分解产生的缺氧条件下典型的生物反硝化作用实现的。湿地建设于1997年完成。该系统目前处于“建立阶段”。

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