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For the fall semester, the Rapid Mix Contact Chamber team worked on assessing the utility of the contact chamber performance in the rapid mixing of raw water and coagulant. The team determined this performing the tests with and without the contact chamber using the coagulant properties which were found. The team ran different tests with a straight flocculator to find the relationship between head loss and nano cluster buildup and to measure the difference in the head loss values when the tests were run with and without the contact chamber. The team found that there was no significant effect on adding a contact chamber for the flocculator studied. |
Spring 2017
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The main goal for the spring semester is to continue testing the utility and role of a contact chamber placed after rapid mix and before flocculation. Last semester's group tested differences in head loss when coagulant was added with and without clay, to analyse whether higher turbidities decreased head loss. From these experiments, the current team will build a flocculator with less head loss, more like what is actually used in an AguaClara plant, and a defined residence time. Another test this semester will include trying to determine whether the coagulant is scoured by the clay or if the free coagulant can be measured even after flocs start forming . Perhaps, measuring the head loss difference in large diameter tubes is not the best way to test for the proportion of free nanoclusters that are not attaching to unwanted particles. In addition, when including a contact chamber , some of the coagulant may be attaching to the walls of the chamber before even reaching the flocculator . |
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Members Spring 2016Meng Zu - mz436@cornell.edu Jillian Whiting - jpw236@cornell.edu Aditi Athavale - asa85@cornell.edu |
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