The development of Taiwanese economics relies mainly on hi-tech industry. If the grinding wastewater generated from the semiconductor industry and the nitrogen, phosphorus wastewater generated from the photovoltaic industry is not treated suitably, it will cause severe impact to the environment. This plan will propose the relevant management information to the Environmental Protection Administration for its management reference through field investigation and the study of current commercial wastewater treatment technology. There are 226 semiconductor firms in the whole nation. Among them, 183 firms are controlled by the Water Control Act, which account for about 81%. Total wastewater discharged is 197,138 CMD every day, and it is mainly discharged from the integrated circuit (IC). There are 133 photovoltaic firms. Among them, 126 firms are controlled by the Water Control Act, which account for about 95%. Total wastewater discharged is up to 194,877.37 CMD. As considering the products and amount of wastewater discharged, it is mainly discharged from the photovoltaic display, which accounts for 83.34%. As for the management way of the semiconductor industry and the photovoltaic industry, the control condition and un-control condition are analyzed, respectively. As for the semiconductor industry, the domestic firms have treated of recovered or reused the grinding wastewater, and the turbid phenomenon of water body is unable to be seen again. The unknown white turbid liquid worried by the people in the rivers does not exist any more. Therefore, it is recommended not to control the grinding wastewater generated from the semiconductor industry temporarily. As for the photovoltaic industry, the execution result of this plan finds that it is necessary to control to its ammonia-nitrogen, orthophosphate wastewater. Stipulate the standard in stages, motivate the manufacturer to conduct the improvement, in order to create the inspection and test data and resolve the communication of rebounding manufacturers. At present, it is recommended to set the standard to be 10 mg/L and 4 mg/L for ammonia-nitrogen and phosphate group, respectively. It is the same as the standard in water resource protection area, but it can be extended to the water body of non protection area.

semiconductor industry,optoelectronics industry,chemical mechanical polishing wastewater,nitrogen and phosphorus wastewater