P-removal in completely mixed systems
Ca. 60 % of the Dutch activated sludge plants consist of completely mixed systems, experiments have been carried out in completely mixed pilot plants to study the biological P-removal. The research was carried out in two pilot plants. The pilot plants consisted of: anaerobic reactor, anoxic reactor,...
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| Veröffentlicht in: | Water science and technology 1985-11, Vol.17 (11-12), p.325-326 |
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| creator | DONKER, H. J. G. W OPIC, P DE VRIES, H. P |
| description | Ca. 60 % of the Dutch activated sludge plants consist of completely mixed systems, experiments have been carried out in completely mixed pilot plants to study the biological P-removal.
The research was carried out in two pilot plants.
The pilot plants consisted of: anaerobic reactor, anoxic reactor, aerobic reactor and a clarifier. All the reactors were completely mixed.
Both plants were fed with settled domestic waste water at a sludge loading of 400 and 250 g COD/kg sludge.day respectively. The results are given below:sludge loading (g COD/kg sludge.day)400400250ratio Anaerobic : Anoxic : Aerobic1: 1:2,71:1:4,11:1:2,7P-removal (%)802875N-removal (%)505065COD-removal (%)858585
It has been shown that there is no significant difference between the results at the two different sludge loadings.
Remarkable is the difference between the ratio 1:1:2,7 in combination with the internal recirculation flow anoxic-anaerobic of 160 % and the ratio 1:1:4,1 with a recirculation flow of 30 %.
During the start-up at a sludge loading of 250 g COD/kg sludge.day and an internal recirculation flow of 30 %, bulking sludge developed almost immediately. The Premoval was completely disturbed.
Increasing the internal recirculation flow to 160% had a positive effect on settling properties and P-removal.
This investigation has pointed out that a completely mixed system is suitable for biological P-removal, without negatively affecting the nitrification. Important factors in the process are the ratio anaerobic:anoxic:aerobic and the recirculation flows. |
| doi_str_mv | 10.2166/wst.1985.0254 |
| format | Article |
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The research was carried out in two pilot plants.
The pilot plants consisted of: anaerobic reactor, anoxic reactor, aerobic reactor and a clarifier. All the reactors were completely mixed.
Both plants were fed with settled domestic waste water at a sludge loading of 400 and 250 g COD/kg sludge.day respectively. The results are given below:sludge loading (g COD/kg sludge.day)400400250ratio Anaerobic : Anoxic : Aerobic1: 1:2,71:1:4,11:1:2,7P-removal (%)802875N-removal (%)505065COD-removal (%)858585
It has been shown that there is no significant difference between the results at the two different sludge loadings.
Remarkable is the difference between the ratio 1:1:2,7 in combination with the internal recirculation flow anoxic-anaerobic of 160 % and the ratio 1:1:4,1 with a recirculation flow of 30 %.
During the start-up at a sludge loading of 250 g COD/kg sludge.day and an internal recirculation flow of 30 %, bulking sludge developed almost immediately. The Premoval was completely disturbed.
Increasing the internal recirculation flow to 160% had a positive effect on settling properties and P-removal.
This investigation has pointed out that a completely mixed system is suitable for biological P-removal, without negatively affecting the nitrification. Important factors in the process are the ratio anaerobic:anoxic:aerobic and the recirculation flows.</description><identifier>ISSN: 0273-1223</identifier><identifier>EISSN: 1996-9732</identifier><identifier>DOI: 10.2166/wst.1985.0254</identifier><identifier>CODEN: WSTED4</identifier><language>eng</language><publisher>London: IWA Publishing</publisher><subject>Activated sludge ; Anaerobic processes ; Anoxia ; Applied sciences ; Biological and medical sciences ; Biological treatment of waters ; Biotechnology ; Bulking sludge ; Environment and pollution ; Exact sciences and technology ; Fundamental and applied biological sciences. Psychology ; General purification processes ; Household wastes ; Industrial applications and implications. Economical aspects ; Nitrification ; Pilot plants ; Plants (botany) ; Pollution ; Reactors ; Removal ; Sludge ; Wastewater ; Wastewaters ; Water treatment and pollution</subject><ispartof>Water science and technology, 1985-11, Vol.17 (11-12), p.325-326</ispartof><rights>1986 INIST-CNRS</rights><rights>Copyright IWA Publishing Nov 1985</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c207t-d5aacf8dd6fe457089b8d243a6564661add64447b49caed13ffff731ea9bfd833</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=8594971$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>DONKER, H. J. G. W</creatorcontrib><creatorcontrib>OPIC, P</creatorcontrib><creatorcontrib>DE VRIES, H. P</creatorcontrib><title>P-removal in completely mixed systems</title><title>Water science and technology</title><description>Ca. 60 % of the Dutch activated sludge plants consist of completely mixed systems, experiments have been carried out in completely mixed pilot plants to study the biological P-removal.
The research was carried out in two pilot plants.
The pilot plants consisted of: anaerobic reactor, anoxic reactor, aerobic reactor and a clarifier. All the reactors were completely mixed.
Both plants were fed with settled domestic waste water at a sludge loading of 400 and 250 g COD/kg sludge.day respectively. The results are given below:sludge loading (g COD/kg sludge.day)400400250ratio Anaerobic : Anoxic : Aerobic1: 1:2,71:1:4,11:1:2,7P-removal (%)802875N-removal (%)505065COD-removal (%)858585
It has been shown that there is no significant difference between the results at the two different sludge loadings.
Remarkable is the difference between the ratio 1:1:2,7 in combination with the internal recirculation flow anoxic-anaerobic of 160 % and the ratio 1:1:4,1 with a recirculation flow of 30 %.
During the start-up at a sludge loading of 250 g COD/kg sludge.day and an internal recirculation flow of 30 %, bulking sludge developed almost immediately. The Premoval was completely disturbed.
Increasing the internal recirculation flow to 160% had a positive effect on settling properties and P-removal.
This investigation has pointed out that a completely mixed system is suitable for biological P-removal, without negatively affecting the nitrification. Important factors in the process are the ratio anaerobic:anoxic:aerobic and the recirculation flows.</description><subject>Activated sludge</subject><subject>Anaerobic processes</subject><subject>Anoxia</subject><subject>Applied sciences</subject><subject>Biological and medical sciences</subject><subject>Biological treatment of waters</subject><subject>Biotechnology</subject><subject>Bulking sludge</subject><subject>Environment and pollution</subject><subject>Exact sciences and technology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General purification processes</subject><subject>Household wastes</subject><subject>Industrial applications and implications. Economical aspects</subject><subject>Nitrification</subject><subject>Pilot plants</subject><subject>Plants (botany)</subject><subject>Pollution</subject><subject>Reactors</subject><subject>Removal</subject><subject>Sludge</subject><subject>Wastewater</subject><subject>Wastewaters</subject><subject>Water treatment and pollution</subject><issn>0273-1223</issn><issn>1996-9732</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1985</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNo9kEtLxDAURoMoWEeX7gvqMjWv5rGUwRcM6ELXIc0DOvQxJh21_96UGbybu7jn-y4cAK4xqgjm_P4nTRVWsq4QqdkJKLBSHCpBySkoEBEUYkLoObhIaYsQEpShAty9w-j78dt0ZTuUdux3nZ98N5d9--tdmeY0-T5dgrNguuSvjnsFPp8eP9YvcPP2_Lp-2EBLkJigq42xQTrHg2e1QFI10hFGDa854xybfGGMiYYpa7zDNOQRFHujmuAkpStwc-jdxfFr79Okt-M-DvmlxopRzJlSMlPwQNk4phR90LvY9ibOGiO9mNDZhF5M6MVE5m-PrSZZ04VoBtum_5CsFVMC0z-ZRl2v</recordid><startdate>19851101</startdate><enddate>19851101</enddate><creator>DONKER, H. J. G. W</creator><creator>OPIC, P</creator><creator>DE VRIES, H. P</creator><general>IWA Publishing</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QH</scope><scope>7UA</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8FE</scope><scope>8FG</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>H96</scope><scope>H97</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>L.G</scope><scope>L6V</scope><scope>M0S</scope><scope>M1P</scope><scope>M7S</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope></search><sort><creationdate>19851101</creationdate><title>P-removal in completely mixed systems</title><author>DONKER, H. J. G. W ; OPIC, P ; DE VRIES, H. P</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c207t-d5aacf8dd6fe457089b8d243a6564661add64447b49caed13ffff731ea9bfd833</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1985</creationdate><topic>Activated sludge</topic><topic>Anaerobic processes</topic><topic>Anoxia</topic><topic>Applied sciences</topic><topic>Biological and medical sciences</topic><topic>Biological treatment of waters</topic><topic>Biotechnology</topic><topic>Bulking sludge</topic><topic>Environment and pollution</topic><topic>Exact sciences and technology</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>General purification processes</topic><topic>Household wastes</topic><topic>Industrial applications and implications. Economical aspects</topic><topic>Nitrification</topic><topic>Pilot plants</topic><topic>Plants (botany)</topic><topic>Pollution</topic><topic>Reactors</topic><topic>Removal</topic><topic>Sludge</topic><topic>Wastewater</topic><topic>Wastewaters</topic><topic>Water treatment and pollution</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>DONKER, H. J. G. W</creatorcontrib><creatorcontrib>OPIC, P</creatorcontrib><creatorcontrib>DE VRIES, H. 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J. G. W</au><au>OPIC, P</au><au>DE VRIES, H. P</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>P-removal in completely mixed systems</atitle><jtitle>Water science and technology</jtitle><date>1985-11-01</date><risdate>1985</risdate><volume>17</volume><issue>11-12</issue><spage>325</spage><epage>326</epage><pages>325-326</pages><issn>0273-1223</issn><eissn>1996-9732</eissn><coden>WSTED4</coden><abstract>Ca. 60 % of the Dutch activated sludge plants consist of completely mixed systems, experiments have been carried out in completely mixed pilot plants to study the biological P-removal.
The research was carried out in two pilot plants.
The pilot plants consisted of: anaerobic reactor, anoxic reactor, aerobic reactor and a clarifier. All the reactors were completely mixed.
Both plants were fed with settled domestic waste water at a sludge loading of 400 and 250 g COD/kg sludge.day respectively. The results are given below:sludge loading (g COD/kg sludge.day)400400250ratio Anaerobic : Anoxic : Aerobic1: 1:2,71:1:4,11:1:2,7P-removal (%)802875N-removal (%)505065COD-removal (%)858585
It has been shown that there is no significant difference between the results at the two different sludge loadings.
Remarkable is the difference between the ratio 1:1:2,7 in combination with the internal recirculation flow anoxic-anaerobic of 160 % and the ratio 1:1:4,1 with a recirculation flow of 30 %.
During the start-up at a sludge loading of 250 g COD/kg sludge.day and an internal recirculation flow of 30 %, bulking sludge developed almost immediately. The Premoval was completely disturbed.
Increasing the internal recirculation flow to 160% had a positive effect on settling properties and P-removal.
This investigation has pointed out that a completely mixed system is suitable for biological P-removal, without negatively affecting the nitrification. Important factors in the process are the ratio anaerobic:anoxic:aerobic and the recirculation flows.</abstract><cop>London</cop><pub>IWA Publishing</pub><doi>10.2166/wst.1985.0254</doi><tpages>2</tpages></addata></record> |
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| ispartof | Water science and technology, 1985-11, Vol.17 (11-12), p.325-326 |
| issn | 0273-1223 1996-9732 |
| language | eng |
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| source | EZB-FREE-00999 freely available EZB journals |
| subjects | Activated sludge Anaerobic processes Anoxia Applied sciences Biological and medical sciences Biological treatment of waters Biotechnology Bulking sludge Environment and pollution Exact sciences and technology Fundamental and applied biological sciences. Psychology General purification processes Household wastes Industrial applications and implications. Economical aspects Nitrification Pilot plants Plants (botany) Pollution Reactors Removal Sludge Wastewater Wastewaters Water treatment and pollution |
| title | P-removal in completely mixed systems |
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