| 摘要 |
An improved apparatus for purifying a liquor containing biodegradable wastes wherein the liquor is delivered serially to a number of zones. The liquor is first delivered to a clarification zone to remove suspended solids, and is then delivered to an oxidation/nitrification zone where the liquor is subjected to oxidation by aerobic microorganisms. The liquor is next delivered to a denitrification zone, where it is subjected to the action of anaerobic bacteria. Both the oxidation/nitrification zone and the dentrification zone contain a particular type of submerged media which comprises a multiplicity of elements freely and randomly stacked on one another to provide interstitial area therebetween. The elements have a high surface area to volume ratio in order to promote the growth of microorganisms.
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