| 摘要 |
The present invention provides a system and method for processing municipal waste into useable products. In a preferred form of the invention the same may be utilized as a composting plant having a rapid time cycle, requiring for batch or continuous feed through operation, a small fraction of the processing time required by conventional biochemical composting plants. Central in the invention is the concept of utilizing a ball-mill to pulverize incoming materials. Specifically usable as a unique combination for municipal waste processing is a wet-grind ball-mill stage followed by a dry-grind ball-mill stage, nonfloatables being reduced by the former and floatables being reduced by the latter. Preferably, both outputs are later combined prior to compacting to produce a usable end product. Heat is supplied in the dry-grind ball-mill stage to preclude layer build up on the interior walls of the ball-mill. In one form of the invention the system or method is used in conjunction with a municipal sewage treatment plant wherein the liquid and sludge phases thereof are utilized in the system and method for milling and also for enriching the materials developed in the system and method, for ultimate processing as a useable fertilizer product.
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