| Abstract |
| At the construction site, wheel cleaning systems are installed to prevent dust scattering. However, it is not included in the effluent discharge facility, and it is not applicable to the law on water quality and aquatic ecosystem conservation, so proper management is not possible. In this study, we developed a continuous multistage waste water treatment system related to a nano bubble sprinkler to treat scattered dust from construction sites. In order to select the optimal operating condition of the system, we evaluated the removal tendencies of contaminants according to the amount of coagulant injected through lab scale test, and performed performance evaluation of the system through field test using wheel cleaning wastewater generated from the construction site. The PAC coagulant was diluted 100 times to reduce pH fluctuation. As a result, the optimal PAC injection amount was 2 ml/L. In addition, As a result of continuous operation for 10 days, SS 85.6%, turbidity 81.8%, CODcr 47.4%, TN 21.6% and TP 56.9% were removed on the average in the field test. |
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| Key Words |
| Construction wastewater, Multi stage settlement, Suspended solid, Turbidity |
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