Alexandra Cheng's Individual Contribution Page

Stock Tank Mixing Teamand Pipeline Cooling Teams

Spring 2014 Contributions

Team Stock Tank Mixing goals this semester will focus focused on re-designing /imagining the stock tank pump to achieve optimal efficiency and energy input usagemixing system to achieve goal density efficiently. A plate mixer and water injection system were developed and were found to be highly effective in properly making and mixing stock solutions.

Pipeline Cooling goals included analyzing the heat transferred to influent water via raw water pipelines and researching possible solutions. Cool roof coating solutions were found to be effective but all products researched were very expensive. Further research is required to understand the impact of water temperature changes on sedimentation tank performance before investing capital in cool roof coating solutions. It is possible that redesign of the plate settlers will be required to rectify the impact of warm influent water circulation in the sedimentation tank.

Fall 2013 Contributions

Team goals this semester included purchasing non-lab environment appropriate (e.g. not easily breakable) hydrometers or other suitable measurement tools for PACl and chlorine stock solutions, testing and confirming the PACl concentration-density relationship, and designing and fabricating a centrifugal pump to be used in the stock tank to ensure complete mixing of stock solutions.

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