| Summary: | 碩士 === 國立中央大學 === 環境工程研究所碩士在職專班 === 94 === Abstract
The industrial liquid waste is a by-product derived from the production process wastage. The production and application of a variety of solvent is vital to our industrial development and the recycling and treatment of the derived waste liquid is an important topic in the environmental protection. The liquid waste generated in Taiwan part of it is recycled and reused by the industry factory itself, part of waste solvent, spent oil and waste liquid are treated by the solid waste incinerator or liquid waste incinerator, some of non-hazardous is drained to waste water treatment plant. However waste liquid or the factory in the more difficult processing non- processes of institution the facility to entrust generation of cleaning up organization elimination processing. Unfortunately, there still exists a large amount of liquid waste which is illegally drained or undeclared. For this amount, a conservative estimate made by EPA indicates that the annual total equals to 300,000 metric tons, a considerably surprising quantity.
Due to the fact the liquid waste is complicated in various descriptions, effective disposal is few and the treatment cost is high. The disposal ways currently adopted by the most qualified disposal organizations are the method of Evaporation, Hydrocrack, Physical-Chemistry treatment, Substitution fuel and Incineration. The success to dispose of the liquid waste lies on experience and behavior in treatment and management. This study begins with the status analysis of the liquid waste for their generation sources, category, quantity, hazard and the related treatment method, in which produced in Taiwan. Then recommend the optimal process of reduction, recycling and reuse technique to serve as the important reference in handling liquid waste. Based on the chemical and physical characteristics and by means of collection sorting and analysis are investigated. This study reaches the following conclusions.
1. The hazardous liquid waste, as calculated by the relative authorities amounted 240,000 – 650,000 metric tons per year. Another estimate of liquid waste totally disposed of is 600,000 metric ton annually. The accuracy requires further checking by the relative authorities.
2. Per the industrial waste disposal program shown on the web site of the Industrial bureau, MOFE, the estimated liquid waste, 350,000 metric tons annually coming from the chemical industry, 125,000 metric tons annual from the electronic industry and 60,000 metric tons annual from other industries.
3. The EPA’s estimate indicates that the liquid waste amount annually produced is much higher than that annual disposed of. If all liquid waste generated is contracted for disposal to the qualified disposal firms, then EPA is in the position to exert strict control over the declaration of liquid waste (including produced in MND and academics agency), there leaves much room for maneuver for the hazardous liquid waste disposal firms.
4. The main goal of the operation control is to set up a set of workable SOP to cover liquid waste’s generation, transportation, receiving, storing, traffic route and final disposal in the disposal site. The most important is to organize the checking list flow and standard operation procedures. The future success of liquid waste depend in large on sample taking and test technique. In addition, the traffic route, hardware and enforcement of storage guard are critical to the performance and efficiency in the disposal site.
5. Treatment of unknown liquid waste: In case that the sample test in lab finds the sample composition of the liquid waste received at the disposal site in found differing from the contracted specification, the customer shall be immediately notified and the sample test shall be kept in custody. If the custom requests the disposal site to treat such liquid waste, the disposal charge shall be renegotiated in accordance with the content of the liquid waste. It is strongly recommended that the disposal site shall have the right to refuse acceptance of unknown liquid waste for the sake that incompatibility of liquid waste would likely bring disaster to the disposal site.
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