The purpose of this project is to evaluate the effluents from four types of industry: 1. printing and dyeing, 2. pesticide production, 3. Printed Circuit Board manufacturing, and, 4. Integrated Circuit and Semiconductor manufacturing. From the evaluation, it is intended to conclude how wastewater from these industries should be regulated. In general, the wastewater from these industries can be regulated by the Hazardous Industrial Waste Identification Standards (HIWIS) that only requires collection then treatment; or it should be first processed through pre-treatment facilities, which involves more issues such as operation costs, available technology and management feasibility. After investigation and assessment, we suggest Cu, Pb and Cr6+ and Ni from the Printed Circuit Board manufacturing process should be regulated by the HIWIS. Waste acid and organic solvents from the Integrated Circuit and Semiconductor manufacturing industry should also only conform to HIWIS. We#ve also proposed the management strategies for all of the four types of industrial wastewater. About the legal aspect, we suggest amending Industrial Water Pollution Prevention Ordinance by adding the listing of industries that should be subject to the regulations in the Assessment Procedure for Industrial Water Pollution Prevention Plans.

printing and dyeing, 、pesticide production,