Enhancement of denitrification in a down-flow hanging sponge reactor by effluent recirculation
A down-flow hanging sponge reactor, constructed by connecting three identical units in series, was applied to the treatment of artificial wastewater containing phenol and ammonia under high salinity conditions (10.9 g-Cl(-)/L). The theoretical hydraulic retention time (HRT) of each unit was 4 h (tot...
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| Veröffentlicht in: | Water science and technology 2013-01, Vol.68 (3), p.591-598 |
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| creator | IKEDA, N NATORI, T OKUBO, T SUGO, A AOKI, M KIMURA, M YAMAGUCHI, T HARADA, H OHASHI, A UEMURA, S |
| description | A down-flow hanging sponge reactor, constructed by connecting three identical units in series, was applied to the treatment of artificial wastewater containing phenol and ammonia under high salinity conditions (10.9 g-Cl(-)/L). The theoretical hydraulic retention time (HRT) of each unit was 4 h (total HRT = 12 h). To enhance denitrification by effluent recirculation, the effluent recirculation ratio was increased in increments ranging from 0.0 to 2.0. The concentration of total ammonia nitrogen (TAN), NO2-N, and NO3-N in the final effluent as a proportion of the TAN in the influent was determined to calculate the unrecovered, or denitrification, proportion. The denitrification proportion of the reactor was equivalent to 19.1 ± 14.1% with no effluent recirculation; however, this was increased to 58.6 ± 6.2% when the effluent recirculation ratio was increased to 1.5. Further increasing the effluent recirculation ratio to 2.0 resulted in a decrease in the denitrification proportion to 50.9 ± 9.3%. Activity assays of nitrification and denitrification, as well as 16S rRNA gene sequence analysis, revealed that denitrification occurred primarily in the upper sections of the reactor, while nitrification increased in the lower sections of the reactor. Gene sequence analysis revealed that denitrification by Azoarcus-like species using phenol as an electron donor was dominant. |
| doi_str_mv | 10.2166/wst.2013.235 |
| format | Article |
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The theoretical hydraulic retention time (HRT) of each unit was 4 h (total HRT = 12 h). To enhance denitrification by effluent recirculation, the effluent recirculation ratio was increased in increments ranging from 0.0 to 2.0. The concentration of total ammonia nitrogen (TAN), NO2-N, and NO3-N in the final effluent as a proportion of the TAN in the influent was determined to calculate the unrecovered, or denitrification, proportion. The denitrification proportion of the reactor was equivalent to 19.1 ± 14.1% with no effluent recirculation; however, this was increased to 58.6 ± 6.2% when the effluent recirculation ratio was increased to 1.5. Further increasing the effluent recirculation ratio to 2.0 resulted in a decrease in the denitrification proportion to 50.9 ± 9.3%. Activity assays of nitrification and denitrification, as well as 16S rRNA gene sequence analysis, revealed that denitrification occurred primarily in the upper sections of the reactor, while nitrification increased in the lower sections of the reactor. Gene sequence analysis revealed that denitrification by Azoarcus-like species using phenol as an electron donor was dominant.</description><identifier>ISSN: 0273-1223</identifier><identifier>EISSN: 1996-9732</identifier><identifier>DOI: 10.2166/wst.2013.235</identifier><identifier>PMID: 23925187</identifier><identifier>CODEN: WSTED4</identifier><language>eng</language><publisher>London: International Water Association</publisher><subject>Ammonia ; Ammonia - chemistry ; Ammonia - metabolism ; Applied sciences ; Azoarcus - genetics ; Azoarcus - isolation & purification ; Bioreactors - microbiology ; Denitrification ; DNA, Bacterial - analysis ; Effluents ; Exact sciences and technology ; Hydraulic retention time ; Models, Chemical ; Nitrification ; Nitrogen - chemistry ; Nitrogen - metabolism ; Nitrogen dioxide ; Phenol - chemistry ; Phenols ; Pollution ; Reactors ; Retention time ; RNA, Ribosomal, 16S - genetics ; Waste Disposal, Fluid - methods ; Waste Water - chemistry ; Wastewater treatment ; Water treatment and pollution</subject><ispartof>Water science and technology, 2013-01, Vol.68 (3), p.591-598</ispartof><rights>2014 INIST-CNRS</rights><rights>Copyright IWA Publishing Aug 2013</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c448t-fec05edee40dea9cd1658fe9ad26f6909f3c215f639914d83404dcbead48d6873</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=27677239$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23925187$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>IKEDA, N</creatorcontrib><creatorcontrib>NATORI, T</creatorcontrib><creatorcontrib>OKUBO, T</creatorcontrib><creatorcontrib>SUGO, A</creatorcontrib><creatorcontrib>AOKI, M</creatorcontrib><creatorcontrib>KIMURA, M</creatorcontrib><creatorcontrib>YAMAGUCHI, T</creatorcontrib><creatorcontrib>HARADA, H</creatorcontrib><creatorcontrib>OHASHI, A</creatorcontrib><creatorcontrib>UEMURA, S</creatorcontrib><title>Enhancement of denitrification in a down-flow hanging sponge reactor by effluent recirculation</title><title>Water science and technology</title><addtitle>Water Sci Technol</addtitle><description>A down-flow hanging sponge reactor, constructed by connecting three identical units in series, was applied to the treatment of artificial wastewater containing phenol and ammonia under high salinity conditions (10.9 g-Cl(-)/L). The theoretical hydraulic retention time (HRT) of each unit was 4 h (total HRT = 12 h). To enhance denitrification by effluent recirculation, the effluent recirculation ratio was increased in increments ranging from 0.0 to 2.0. The concentration of total ammonia nitrogen (TAN), NO2-N, and NO3-N in the final effluent as a proportion of the TAN in the influent was determined to calculate the unrecovered, or denitrification, proportion. The denitrification proportion of the reactor was equivalent to 19.1 ± 14.1% with no effluent recirculation; however, this was increased to 58.6 ± 6.2% when the effluent recirculation ratio was increased to 1.5. Further increasing the effluent recirculation ratio to 2.0 resulted in a decrease in the denitrification proportion to 50.9 ± 9.3%. Activity assays of nitrification and denitrification, as well as 16S rRNA gene sequence analysis, revealed that denitrification occurred primarily in the upper sections of the reactor, while nitrification increased in the lower sections of the reactor. Gene sequence analysis revealed that denitrification by Azoarcus-like species using phenol as an electron donor was dominant.</description><subject>Ammonia</subject><subject>Ammonia - chemistry</subject><subject>Ammonia - metabolism</subject><subject>Applied sciences</subject><subject>Azoarcus - genetics</subject><subject>Azoarcus - isolation & purification</subject><subject>Bioreactors - microbiology</subject><subject>Denitrification</subject><subject>DNA, Bacterial - analysis</subject><subject>Effluents</subject><subject>Exact sciences and technology</subject><subject>Hydraulic retention time</subject><subject>Models, Chemical</subject><subject>Nitrification</subject><subject>Nitrogen - chemistry</subject><subject>Nitrogen - metabolism</subject><subject>Nitrogen dioxide</subject><subject>Phenol - chemistry</subject><subject>Phenols</subject><subject>Pollution</subject><subject>Reactors</subject><subject>Retention time</subject><subject>RNA, Ribosomal, 16S - genetics</subject><subject>Waste Disposal, Fluid - 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chemistry</topic><topic>Ammonia - metabolism</topic><topic>Applied sciences</topic><topic>Azoarcus - genetics</topic><topic>Azoarcus - isolation & purification</topic><topic>Bioreactors - microbiology</topic><topic>Denitrification</topic><topic>DNA, Bacterial - analysis</topic><topic>Effluents</topic><topic>Exact sciences and technology</topic><topic>Hydraulic retention time</topic><topic>Models, Chemical</topic><topic>Nitrification</topic><topic>Nitrogen - chemistry</topic><topic>Nitrogen - metabolism</topic><topic>Nitrogen dioxide</topic><topic>Phenol - chemistry</topic><topic>Phenols</topic><topic>Pollution</topic><topic>Reactors</topic><topic>Retention time</topic><topic>RNA, Ribosomal, 16S - genetics</topic><topic>Waste Disposal, Fluid - methods</topic><topic>Waste Water - chemistry</topic><topic>Wastewater treatment</topic><topic>Water treatment and pollution</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>IKEDA, N</creatorcontrib><creatorcontrib>NATORI, T</creatorcontrib><creatorcontrib>OKUBO, T</creatorcontrib><creatorcontrib>SUGO, A</creatorcontrib><creatorcontrib>AOKI, M</creatorcontrib><creatorcontrib>KIMURA, M</creatorcontrib><creatorcontrib>YAMAGUCHI, T</creatorcontrib><creatorcontrib>HARADA, H</creatorcontrib><creatorcontrib>OHASHI, A</creatorcontrib><creatorcontrib>UEMURA, S</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Aqualine</collection><collection>Water Resources Abstracts</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central</collection><collection>AUTh Library subscriptions: ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 3: Aquatic Pollution & Environmental Quality</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>ProQuest Engineering Collection</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>PML(ProQuest Medical Library)</collection><collection>Engineering Database</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Engineering collection</collection><collection>MEDLINE - Academic</collection><collection>Environment Abstracts</collection><collection>Environment Abstracts</collection><jtitle>Water science and technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>IKEDA, N</au><au>NATORI, T</au><au>OKUBO, T</au><au>SUGO, A</au><au>AOKI, M</au><au>KIMURA, M</au><au>YAMAGUCHI, T</au><au>HARADA, H</au><au>OHASHI, A</au><au>UEMURA, S</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Enhancement of denitrification in a down-flow hanging sponge reactor by effluent recirculation</atitle><jtitle>Water science and technology</jtitle><addtitle>Water Sci Technol</addtitle><date>2013-01-01</date><risdate>2013</risdate><volume>68</volume><issue>3</issue><spage>591</spage><epage>598</epage><pages>591-598</pages><issn>0273-1223</issn><eissn>1996-9732</eissn><coden>WSTED4</coden><abstract>A down-flow hanging sponge reactor, constructed by connecting three identical units in series, was applied to the treatment of artificial wastewater containing phenol and ammonia under high salinity conditions (10.9 g-Cl(-)/L). The theoretical hydraulic retention time (HRT) of each unit was 4 h (total HRT = 12 h). To enhance denitrification by effluent recirculation, the effluent recirculation ratio was increased in increments ranging from 0.0 to 2.0. The concentration of total ammonia nitrogen (TAN), NO2-N, and NO3-N in the final effluent as a proportion of the TAN in the influent was determined to calculate the unrecovered, or denitrification, proportion. The denitrification proportion of the reactor was equivalent to 19.1 ± 14.1% with no effluent recirculation; however, this was increased to 58.6 ± 6.2% when the effluent recirculation ratio was increased to 1.5. Further increasing the effluent recirculation ratio to 2.0 resulted in a decrease in the denitrification proportion to 50.9 ± 9.3%. Activity assays of nitrification and denitrification, as well as 16S rRNA gene sequence analysis, revealed that denitrification occurred primarily in the upper sections of the reactor, while nitrification increased in the lower sections of the reactor. Gene sequence analysis revealed that denitrification by Azoarcus-like species using phenol as an electron donor was dominant.</abstract><cop>London</cop><pub>International Water Association</pub><pmid>23925187</pmid><doi>10.2166/wst.2013.235</doi><tpages>8</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0273-1223 |
| ispartof | Water science and technology, 2013-01, Vol.68 (3), p.591-598 |
| issn | 0273-1223 1996-9732 |
| language | eng |
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| source | MEDLINE; EZB Electronic Journals Library |
| subjects | Ammonia Ammonia - chemistry Ammonia - metabolism Applied sciences Azoarcus - genetics Azoarcus - isolation & purification Bioreactors - microbiology Denitrification DNA, Bacterial - analysis Effluents Exact sciences and technology Hydraulic retention time Models, Chemical Nitrification Nitrogen - chemistry Nitrogen - metabolism Nitrogen dioxide Phenol - chemistry Phenols Pollution Reactors Retention time RNA, Ribosomal, 16S - genetics Waste Disposal, Fluid - methods Waste Water - chemistry Wastewater treatment Water treatment and pollution |
| title | Enhancement of denitrification in a down-flow hanging sponge reactor by effluent recirculation |
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