http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-167454-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_90f99cef3cc3451bc1c752483614f2fb |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02W10-10 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D21-2427 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D21-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F3-1215 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F3-12 |
| filingDate | 1921-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1922-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-167454-A |
| titleOfInvention | Improvements relating to treatment of sewage |
| abstract | 167,454. Dorr Co., (Assignees of Peck, C.L.). July 31, 1920, [Convention date]. Void [Published under Sect. 91 of the Act]. Plant; gravity-separation apparatus; aerating; bacteriological processes; treating - materials; manures.-A complete system of sewage treatment comprises (1) subjection of the sewage to biological action as it flows through the sewer, (2) screening, (3) upward passage of the sewage through an accumulation of biological sludge, (4) aeration with circulation in the presence of sludge and sedimentation. One or more of these steps may be omitted and the order of the last two may be reversed. Bacteria and materials conducive to biological growth may be added at any step of the treatment, such materials including iron, iron hydroxide and carbonate and other compounds or iron, carbonates and hydroxides of manganese, titanium, aluminium, and metals of the earth-oxide group, powdered fertilizing agents such as phosphate rock, and greensand, antitoxic agents such as potassium bicarbonate or other bicarbonate. Effluents from packing- houses. waste vegetable products, such as sawdust or garbage, or the screenings obtained in the preliminary treatment of sewage as described in Specification 161,164. may also be added with the object of providing food for the organisms. The sewage after subjection to biological action in the sewers 5, 6 is passed through a rotary strainer 12 to a digesting tank 21 in which it is distributed below an accumulation of biological sludge by a rotating perforated pipe 26. A rotary arm 27 has rakes 28, an agitating chain 32 and a plough at the end to prevent the accumulation of septic matter. The overflow from the tank 21 passes to a tank 35 for aeration, circulation and settling. Air-diffusers 36 are provided in the bottom of the tank and under the influence of the air the liquid rise,; into a central pipe 50, the major part of the liquid passing downward again through a pipe 49, attached to a rotating shaft 42 which supports scrapers 45 directing sludge outward along the bottom of the tank to mingle with the inflowing liquid. A portion of the circulating liquid flows over the top of the pipe 50 and is directed on to an inclined tray 38 by a concentric baffle 52. Rotary scrapers 45 coact with the surface of the tray. Sludge suitable for use as fertilizer is discharged through a pipe 54, some of the liquid is returned down wells 39 to the lower compartment, and clear effluent leaves bv a launder 47. If treatment in the tank 21 is made the last step of the process, sludge is withdrawn through a pipe 29 and the level of the sludge kept so that a clear effluent overflows from the tank. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111003780-A |
| priorityDate | 1920-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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