| 摘要 |
A method for composting solid material, utilizing improved air circulation and better recovery of ammonia produced as a by product, is new. Air is sucked (5) through heaps of solid material being turned into compost by aerobic fermentation. This is done by drawing a slight vacuum in perforated ducts (2) beneath the heaps. Air and gaseous fermentation products are bubbled through an aqueous solution of phosphoric or nitric acid (6). Ammonia present in the gas reacts with the acid to produce a useful fertilizer. An Independent claim is also included for equipment to carry out the process.
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