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On November 12, 2009 (Do not date the experiments on the wiki, unless you have no other way of keeping track), an experiment was conducted with the turbidity set around 5 NTU, flocculator length of 2796 cm, flow rate of 5 mL/s, and alum dosage ranged from 10 to 50 mg/L.

The data processor fails failed to fit a curve into on the gamma PDF graph due to the lack of efficient flocculation (I'm not sure what you mean by efficient flocculation) and trend/difference among the turbidity produced by the varying alum doses (I don't know if you can say that these were the causes. It has to do that . We speculate this is because at 5 NTU, the water is more difficult to flocculate because it is such a low turbidity and the fact that at the original length did not allow for enough time for flocs to form. Thus, the turbidity data did not fit the statistical distribution function (a gamma pdf) that we are using. It may be that these are causes of this not fitting, but I am not sure.)

Because the experiment was conducted with such a low influent turbidity, there are less colloidal particles present in the water and less probability for these particles to collide with one another. Hence, for this experiment, the shortness of the flocculator and the limited effect of the alum caused the failure of producing a significant improvement in the turbidity of the water. There will need to be a higher collision potential for these particles to successfully collide and create bigger flocs necessary for a successful flocculation. The residual turbidity graph (Figure 1) shows the resulting mean turbidity settling down to around 2 NTU starting from the alum dose of 20 mg/L. (I see what you are trying to say. Condense this section about why you fail to fit the gamma function and then speculate the cause. We cannot say for certain.)

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