Abstract
This study is a case in construction field using data that aims to practical use by developing the reduction equipment of non-point sources pollution which can be decreased the pollution of water quality from the initial rainfall caused at the bridge or the accessible-footbridge of friendly-water installed on a highway that passes over a stream. In order to utilize for the device of medium-sized using the model which produced from the pre-studied by the small-sized, and the efficiency in reducing was analyzed on the biochemical oxygen demand (BOD), chemical oxygen demand (COD), the total nitrogen (T-N), and suspended solid (SS) that carried out performed with the laboratory and the filed experimental study. As a result, the decrease apparatus confirmed excellent the equipment that an averaged removal efficiencies were achieved to 80.5% for BOD, 82.9% for COD, 66.6% for T-N, and 89.4% for SS, respectively.
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