Under the research results of this project¸ we found the fly ash waste from secondary copper smelting industry and some small and medium industrial waste incinerator potentially contained dioxins. So we proposed the management measures for fly ash of secondary copper smelting industry included properly storage, safe re-use and treatment. We also recommended giving a regular inspection to guide the small and medium industrial waste incinerator facilities in order to force them to operate in an optimal operation and eliminated facilities with poor efficiency to ensure such problem will not impact the environment. For the incineration test of mixed organic sludge and general waste into municipal solid waste incineration plant, we found the incinerator could function properly without adverse impact to the environment under proper management and small amount of organic sludge addition (3~5%). Although we saw some higher mercury and dioxins levels in the reaction product (fly ash) and some chromium and hexavalent chromium in the bottom ash, this problem could be solved with proper management and operation parameters adjustment. So any municipal solid waste incineration plant which want to treat the organic sludge, should run trial burns to find out the optimal operation mode and to ensure a properly treatment. Ultimately, base on the current sludge situation in Taiwan, our suggestions are as following. In the short-term future, use the capacity of current waste treatment facilities to solve the problem of the organic sludge which couldn’t be properly handled. Then ask sludge producer making proper reduction and re-use should be the mid-term target. Finally, establish diversified treatment and recycling mechanism to reach resource sustainable use will be the final and long-term target.

Organic sludge;Dioxin;Heavy metal