Aerobic waste sludge digester-thickener orbital system and method
A thickener well (25) is provided in one end of a digester orbital ditch (10) having a pair of channels (17,18) and an elongated center partition (19) spaced from a pair of ditch endwalls (14,15), the overall ditch forming a basin (16) for digestion of wasted sludge. A curved endwall (15) of the dit...
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| creator | EISMIN, RICHARD J RISER, FREDERICK M DI GREGORIO, DAVID |
| description | A thickener well (25) is provided in one end of a digester orbital ditch (10) having a pair of channels (17,18) and an elongated center partition (19) spaced from a pair of ditch endwalls (14,15), the overall ditch forming a basin (16) for digestion of wasted sludge. A curved endwall (15) of the ditch provides a common curved top outer peripheral wall of the thickener well. The remainder of the well has a cylindrical configuration integral with the orbital ditch bottom (29) and extending downwardly therefrom to a position below the horizontal plane of the ditch bottom. A sludge raking structure (28) is positioned at the bottom of the well for periodically raking settled sludge into a sludge outlet (36) at the bottom of the well. A surface aerator (20) is provided between and spaced from the other ditch endwall (14) and a juxtaposed end of the partition (19) or other aeration apparatus mounted in a channel(s) to aerate and propel a liquid-solids sludge mixture wasted from a secondary treatment apparatus and fed into the orbital ditch. The mixture is circulated in the ditch and across and through a top portion of the well. The orbital ditch (10) may be decanted by turning off the aerator (20), allowing a clear liquid top layer to form in the ditch and decanting the clear liquid from the tank by lowering a weir (46) or by adding additional activated sludge to the ditch to displace clear liquid over a fixed weir. |
| format | Patent |
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A curved endwall (15) of the ditch provides a common curved top outer peripheral wall of the thickener well. The remainder of the well has a cylindrical configuration integral with the orbital ditch bottom (29) and extending downwardly therefrom to a position below the horizontal plane of the ditch bottom. A sludge raking structure (28) is positioned at the bottom of the well for periodically raking settled sludge into a sludge outlet (36) at the bottom of the well. A surface aerator (20) is provided between and spaced from the other ditch endwall (14) and a juxtaposed end of the partition (19) or other aeration apparatus mounted in a channel(s) to aerate and propel a liquid-solids sludge mixture wasted from a secondary treatment apparatus and fed into the orbital ditch. The mixture is circulated in the ditch and across and through a top portion of the well. The orbital ditch (10) may be decanted by turning off the aerator (20), allowing a clear liquid top layer to form in the ditch and decanting the clear liquid from the tank by lowering a weir (46) or by adding additional activated sludge to the ditch to displace clear liquid over a fixed weir.</description><language>eng ; fre ; ger</language><subject>CHEMISTRY ; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT ; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC ; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS ; METALLURGY ; PERFORMING OPERATIONS ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; SEPARATION ; TECHNICAL SUBJECTS COVERED BY FORMER USPC ; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS ; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE ; TRANSPORTING ; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE</subject><creationdate>1990</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19901003&DB=EPODOC&CC=EP&NR=0390575A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19901003&DB=EPODOC&CC=EP&NR=0390575A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>EISMIN, RICHARD J</creatorcontrib><creatorcontrib>RISER, FREDERICK M</creatorcontrib><creatorcontrib>DI GREGORIO, DAVID</creatorcontrib><title>Aerobic waste sludge digester-thickener orbital system and method</title><description>A thickener well (25) is provided in one end of a digester orbital ditch (10) having a pair of channels (17,18) and an elongated center partition (19) spaced from a pair of ditch endwalls (14,15), the overall ditch forming a basin (16) for digestion of wasted sludge. A curved endwall (15) of the ditch provides a common curved top outer peripheral wall of the thickener well. The remainder of the well has a cylindrical configuration integral with the orbital ditch bottom (29) and extending downwardly therefrom to a position below the horizontal plane of the ditch bottom. A sludge raking structure (28) is positioned at the bottom of the well for periodically raking settled sludge into a sludge outlet (36) at the bottom of the well. A surface aerator (20) is provided between and spaced from the other ditch endwall (14) and a juxtaposed end of the partition (19) or other aeration apparatus mounted in a channel(s) to aerate and propel a liquid-solids sludge mixture wasted from a secondary treatment apparatus and fed into the orbital ditch. The mixture is circulated in the ditch and across and through a top portion of the well. The orbital ditch (10) may be decanted by turning off the aerator (20), allowing a clear liquid top layer to form in the ditch and decanting the clear liquid from the tank by lowering a weir (46) or by adding additional activated sludge to the ditch to displace clear liquid over a fixed weir.</description><subject>CHEMISTRY</subject><subject>CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT</subject><subject>GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC</subject><subject>GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS</subject><subject>METALLURGY</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>SEPARATION</subject><subject>TECHNICAL SUBJECTS COVERED BY FORMER USPC</subject><subject>TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS</subject><subject>TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS</subject><subject>TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE</subject><subject>TRANSPORTING</subject><subject>TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1990</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHB0TC3KT8pMVihPLC5JVSjOKU1JT1VIyUxPBXKLdEsyMpOzU_NSixTyi5IySxJzFIorgRK5Col5KQq5qSUZ-Sk8DKxpiTnFqbxQmptBwc01xNlDN7UgPz61uCAxGai_JN41wMDY0sDU3NTR0JgIJQDDOzGO</recordid><startdate>19901003</startdate><enddate>19901003</enddate><creator>EISMIN, RICHARD J</creator><creator>RISER, FREDERICK M</creator><creator>DI GREGORIO, DAVID</creator><scope>EVB</scope></search><sort><creationdate>19901003</creationdate><title>Aerobic waste sludge digester-thickener orbital system and method</title><author>EISMIN, RICHARD J ; RISER, FREDERICK M ; DI GREGORIO, DAVID</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP0390575A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>1990</creationdate><topic>CHEMISTRY</topic><topic>CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT</topic><topic>GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC</topic><topic>GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS</topic><topic>METALLURGY</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</topic><topic>SEPARATION</topic><topic>TECHNICAL SUBJECTS COVERED BY FORMER USPC</topic><topic>TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS</topic><topic>TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS</topic><topic>TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE</topic><topic>TRANSPORTING</topic><topic>TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE</topic><toplevel>online_resources</toplevel><creatorcontrib>EISMIN, RICHARD J</creatorcontrib><creatorcontrib>RISER, FREDERICK M</creatorcontrib><creatorcontrib>DI GREGORIO, DAVID</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>EISMIN, RICHARD J</au><au>RISER, FREDERICK M</au><au>DI GREGORIO, DAVID</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Aerobic waste sludge digester-thickener orbital system and method</title><date>1990-10-03</date><risdate>1990</risdate><abstract>A thickener well (25) is provided in one end of a digester orbital ditch (10) having a pair of channels (17,18) and an elongated center partition (19) spaced from a pair of ditch endwalls (14,15), the overall ditch forming a basin (16) for digestion of wasted sludge. A curved endwall (15) of the ditch provides a common curved top outer peripheral wall of the thickener well. The remainder of the well has a cylindrical configuration integral with the orbital ditch bottom (29) and extending downwardly therefrom to a position below the horizontal plane of the ditch bottom. A sludge raking structure (28) is positioned at the bottom of the well for periodically raking settled sludge into a sludge outlet (36) at the bottom of the well. A surface aerator (20) is provided between and spaced from the other ditch endwall (14) and a juxtaposed end of the partition (19) or other aeration apparatus mounted in a channel(s) to aerate and propel a liquid-solids sludge mixture wasted from a secondary treatment apparatus and fed into the orbital ditch. The mixture is circulated in the ditch and across and through a top portion of the well. The orbital ditch (10) may be decanted by turning off the aerator (20), allowing a clear liquid top layer to form in the ditch and decanting the clear liquid from the tank by lowering a weir (46) or by adding additional activated sludge to the ditch to displace clear liquid over a fixed weir.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE |
| title | Aerobic waste sludge digester-thickener orbital system and method |
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