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Growing Pains Three New Plants Address Capacity, Quality Issues
Author(s) -
Qureshi Naeem,
Ulrich Mike
Publication year - 2007
Publication title -
opflow
Language(s) - English
Resource type - Journals
eISSN - 1551-8701
pISSN - 0149-8029
DOI - 10.1002/j.1551-8701.2007.tb02747.x
Subject(s) - water treatment , aeration , water quality , environmental science , waste management , environmental engineering , air quality index , air stripping , water supply , stripping (fiber) , engineering , wastewater , geography , meteorology , ecology , electrical engineering , biology
This article describes how air‐stripping provided a cost‐effective solution for volatile organic chemical (VOC) removal in Blaine, Minnesota. Blaine uses well water and some customers had water quality problems in the form of red and black water that was staining their plumbing fixtures. In addition, the discovery of the VOC 1,2‐dichloroethane (DCA) in two wells at concentrations higher than the maximum contaminant level (MCL) caused the two wells to be taken off‐line. The city completed a water supply master plan which projected construction of several water treatment plants to improve water quality that would be funded by increased rates and connection charges. The article describes how the city decided to use air‐stripping to remove VOCs at Treatment Plant No.1, and chemical oxidation and filtration to remove iron and manganese at Treatment Plants Nos. 2 and 3 along with an aerator to remove radon at Plant No. 2. The article discusses construction costs and treatment techniques for each new treatment plant.