Sewage treatment system
AssigneeEcodyne Corporation
InventorDonald G. Mason
Life of this patent
Estimating the term…
Abstract
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.
Claims6
Improved apparatus for purifying a liquor containing a biodegradable material comprising:
- means defining a clarification zone;
- means for delivering said liquor to said clarification zone;
- means defining an oxidation/nitrification zone;
- a first bed of media in said oxidation/nitrification zone, said media comprising a multiplicity of submerged elements freely and randomly stacked on one another to provide interstitial area therebetween, said elements having a high surface area to volume ratio;
- aeration means in said oxidation/nitrification zone for introducing air into said liquor;
- means for delivering said liquor from said clarification zone to said oxidation/nitrification zone;
- means for delivering liquor through said first bed of media;
- means defining a denitrification zone;
- a second bed of said media in said denitrification zone;
- means for delivering said liquor through said second bed of media;
- means for delivering said liquor from said oxidation/nitrification zone to said denitrification zone;
- means for introducing a nutrient into said second bed of media;
- and means for withdrawing said liquor from said denitrification zone, said oxidation/nitrification zone, said denitrification zone, and said filter means being positioned around the perimeter of said clarification zone to form a single, compact unit.
Improved apparatus for purifying a liquor containing biodegradable material comprising:
- a surge tank;
- inlet means for delivering said liquor to said surge tank;
- a generally cylindrical tank defining a clarification zone;
- means for delivering said liquor from said surge tank to said clarification zone;
- means defining an oxidation/nitrification zone;
- a first bed of media in said oxidation/nitrification zone, said media comprising a multiplicity of submerged elements freely and randomly stacked on one another to provide interstitial area therebetween, said elements having a high surface area to volume ratio;
- aeration means in said oxidation/nitrification zone for introducing air into said liquor;
- means for delivering said liquor from said clarification zone to said oxidation/nitrification zone;
- means for delivering said liquor through said first bed of media;
- means defining a denitrification zone;
- means for delivering said liquor from said oxidation/nitrification zone to said denitrification zone;
- a second bed of said media in said denitrification zone;
- means for delivering said liquor through said second bed of media;
- means for introducing a nutrient into said second bed of media;
- means defining a filtration zone having a filter bed therein;
- means for delivering said liquor from said denitrification zone to said filtration zone;
- means for backwashing said filter bed with filtered liquid;
- means for delivering the effluent from said backwashing to said surge tank;
- means defining a chlorination zone;
- means for delivering said liquor that has passed through said filter bed to said chlorination zone;
- means for chlorinating said liquor in said chlorination zone;
- means defining a sludge digestion zone;
- and means for delivering sludge from a lower portion of said clarification zone to said sludge digestion zone;
- said surge tank, said oxidation/nitrification zone, said denitrification zone, said filtration zone, said chlorination zone, and said sludge digestion zone being positioned around the perimeter of said clarification zone to form a single, compact unit.
Dependencies are inferred from the claim text.