A Bench Scale Study on Polluted Canal Water Purification in Comparison between with and without Addition of Fermented Products
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Abstract
This study aimed to investigate the possibility of using five types of fermented product (FP) to improve the removal efficiency of basic pollutants (under aerobic condition via strong agitation), i.e., non-filtered CODT, BODT and SS presenting in two polluted canals in Bangkok area, namely, San Saeb and Kaja canals. The results were compared with the ‘Control’ experiment, which was without the addition of any fermented products (FPs). Obviously, it was found that the addition of FPs (containing high VFA) increased the CODT concentration of the raw polluted water from 52 to the range of 87 – 107 mg/L. However, there was no clear-cut conclusion on the benefit of the FP addition in this study. Also, it was apparent that all five designated FPs gave similar treatment results. The only advantage of the FP supplement was to increase the MLSS or bacteria mass in less time, which is good for a startup process. However, bacterial mass (MLSS) can be enhanced through an ordinary startup without necessity of FP addition if there is no any particular problem. In conclusion, BOD and COD removals in the reactors with FP addition were not significantly different from the ‘Controls’, which eventually determined that EM and FPs addition cannot effectively treat polluted water.
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References
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