A knowledge-based system for waste minimzation in metal finishing and electroplating industries

This paper introduces a knolledge-based system for waste minimization in metal finishing and electroplating industries—MEPPI (minimization of environmental problems in processing industries) waste minimization techniques, such as process modification, raw materials reduction and resource recycling and recovery, and suggests its implementation in industries rather than end-of-pipe treatment. The data for process analysis, materials balance for each unit, and test data collection, should be inputed into MEPPI first. One can then obtain information on which unit will generate wastes, what kind waste will be produced, and the waste amount and content. Further analysis of this information can reveal if each unit is operating ideally and if the whole process is in the best state. MEPPI can indicate the possibility of waste minimization in every unit, provide all kinds of waste recovery and recycling methods for users to select from, and can reduce raw materials consumption so that the loading on the end-of-pipe treatment plant will be diminished. Realization of waste minimization will improve the economics of industries. MEPPI is a rich-database, friendly-interactive system integrating waste minimization audit calculation and waste minimization technique in a computer package. It can help designers to estimate the waste of a new factory and also process management or operators to minimize the release of hazardous or toxic waste into the environment. Project supported by the Sino Software Research Center of the Hong Kong University of Science and Technology.