Zeyu Yao's Individual Contribution Page

Fall '13 Contributions

Chlorinator packaging for India

I prepared a setup manual for local personnel who are not familiar with chemical dose controller to aid the system assembling process. I also started to prepare a packaging spreadsheet because a large of the components need to be pre-assembled in lab since they cannot be locally sourced as well as easily assembled. This spreadsheet will be complete once Mathcad codes are embedded. 

Improving CDC design

I calculated using Mathcad the number and length of dosing tube for a low flow plant (plant flow rate = 2.4 L/s), and modified the manifold design based on the calculations. Changes I made to the setup include cutting the manifold to only two pairs, and eliminating or shortening unnecessary tubings and pipes. I also tested drop tube calibration and found that a ball valve can be attached so solution volume can be directly measured in drop tube. The added weight of ball valve may offset the balance of lever arm, but errors are negligible.

I did research on different types of constant head tank to replace the one that is not chlorine resistant. I found a Nalgene bottle and cap made of chlorine resistant materials, and also a chlorine resistant bottle with a regular cap with Teflon cap liner added. 

I designed a single lever for dosing one chemical, and made Sketchup drawings for the lever arm and drop tube group.