You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 10 Next »

Previous Research by the AguaClara team in Fall of 2005 to Spring of 2006

Unknown macro: {float}

Unable to render embedded object: File (Coagulation zones.png) not found.

Aluminum solubility diagram showing the importance of maintaining a circumneutral pH for flocculation.

The lime feeder research team investigated the possibility of building a lime feeder for the AguaClara plant at Ojojona. In the end flocculation at Ojojona was successful without lime addition and the lime feeder project was dropped. We now know that low alkalinity waters are common in Honduras and that setting an appropriate alum dose is extremely difficult because addition of a little bit too much alum consumes all of the alkalinity and results in low pH water. At low pH the solubility of

Unknown macro: {latex}

[Al\left(

Unknown macro: {OH}

\right)_3 ]

increases
[ANC control with Lime|^ANC control with Lime.docx] by Amy Yeh and Melina Diaconis
The following analysis needs to be reviewed and converted to analysis in MathCAD. The analysis includes cost comparisons for ANC control using lime,

Unknown macro: {latex}

[Ca\left(

Unknown macro: {OH}

\right)_2 ]

, and sodium carbonate,

Unknown macro: {latex}

[Na_2 CO_3 ]

. The mass of the chemical stocks per day is also calculated.
[Preliminary chemistry analysis spreadsheet|^ANC control.xlsm]

Unknown macro: {float}

Unable to render embedded object: File (lime feeder experiment.jpg) not found.

Laboratory experimentation with the upflow suspended bed lime feeder during the spring of 2006.
  • No labels