A tracer study in a vertical flow constructed wetland treating septage
Purpose This study aims to investigate the hydraulic behaviour of a pilot-scale, two-staged, vertical flow constructed wetland (VFCW) for septage treatment, in terms of factors such as hydraulic retention time and hydraulic loading rate and its influence on the treatment dynamics. Because of intermi...
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| Veröffentlicht in: | World journal of engineering 2018-06, Vol.15 (3), p.345-353 |
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| creator | Bui, Jason Jie Xiang Tan, Yee Yong Tang, Fu Ee Ho, Carrie |
| description | Purpose
This study aims to investigate the hydraulic behaviour of a pilot-scale, two-staged, vertical flow constructed wetland (VFCW) for septage treatment, in terms of factors such as hydraulic retention time and hydraulic loading rate and its influence on the treatment dynamics. Because of intermittent feeding mode of VFCW systems and variation in its loading, its hydraulic behaviour is highly variable and need to be understood to optimize its treatment performance.
Design/methodology/approach
Tracer test were carried out using bromide ion with varying hydraulic loading rates (HLR) of 6.82 cm/d, 9.09 cm/d and 11.40 cm/d (i.e. equivalent to 75 L/d, 100L/d and 125 L/d). Tracer data is then analysed using the Residence Time Distribution (RTD) method.
Findings
RTD analysis showed that the increase in HLR increases the average hydraulic retention time (HRT). Subsequently, the increase in HLR results in a lower recovery of effluent, resulting in poor productivity in treatment. The study also showed that the removal of nitrogen and organic matter improved with increasing HRT. However, observations show no correlation between HRT and total solids removal.
Originality/value
A performance evaluation method (by tracer) is proposed to understand the hydraulics of flow in constructed wetlands, which has not been widely studied. Additionally, the dynamics of treatment in VFCWs treating septage may also be revealed by the tracer method. The study can be applied to any constructed wetlands designed for treatment of wastewater, septage or sludge. |
| doi_str_mv | 10.1108/WJE-09-2017-0306 |
| format | Article |
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This study aims to investigate the hydraulic behaviour of a pilot-scale, two-staged, vertical flow constructed wetland (VFCW) for septage treatment, in terms of factors such as hydraulic retention time and hydraulic loading rate and its influence on the treatment dynamics. Because of intermittent feeding mode of VFCW systems and variation in its loading, its hydraulic behaviour is highly variable and need to be understood to optimize its treatment performance.
Design/methodology/approach
Tracer test were carried out using bromide ion with varying hydraulic loading rates (HLR) of 6.82 cm/d, 9.09 cm/d and 11.40 cm/d (i.e. equivalent to 75 L/d, 100L/d and 125 L/d). Tracer data is then analysed using the Residence Time Distribution (RTD) method.
Findings
RTD analysis showed that the increase in HLR increases the average hydraulic retention time (HRT). Subsequently, the increase in HLR results in a lower recovery of effluent, resulting in poor productivity in treatment. The study also showed that the removal of nitrogen and organic matter improved with increasing HRT. However, observations show no correlation between HRT and total solids removal.
Originality/value
A performance evaluation method (by tracer) is proposed to understand the hydraulics of flow in constructed wetlands, which has not been widely studied. Additionally, the dynamics of treatment in VFCWs treating septage may also be revealed by the tracer method. The study can be applied to any constructed wetlands designed for treatment of wastewater, septage or sludge.</description><identifier>ISSN: 1708-5284</identifier><identifier>EISSN: 2515-8082</identifier><identifier>DOI: 10.1108/WJE-09-2017-0306</identifier><language>eng</language><publisher>Brentwood: Emerald Publishing Limited</publisher><subject>Design optimization ; Efficiency ; Effluents ; Fluid flow ; Hydraulic loading ; Hydraulic retention time ; Hydraulics ; Loading rate ; Organic matter ; Performance evaluation ; Residence time distribution ; Sludge ; Wastewater treatment ; Wetlands</subject><ispartof>World journal of engineering, 2018-06, Vol.15 (3), p.345-353</ispartof><rights>Emerald Publishing Limited</rights><rights>Emerald Publishing Limited.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c353t-bc0977101b2c70ad8f247febe147194ba16c770622461115f5f72457140ffac23</citedby><cites>FETCH-LOGICAL-c353t-bc0977101b2c70ad8f247febe147194ba16c770622461115f5f72457140ffac23</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.emerald.com/insight/content/doi/10.1108/WJE-09-2017-0306/full/html$$EHTML$$P50$$Gemerald$$H</linktohtml><link.rule.ids>314,780,784,966,11633,21693,27922,27923,52687,53242</link.rule.ids></links><search><creatorcontrib>Bui, Jason Jie Xiang</creatorcontrib><creatorcontrib>Tan, Yee Yong</creatorcontrib><creatorcontrib>Tang, Fu Ee</creatorcontrib><creatorcontrib>Ho, Carrie</creatorcontrib><title>A tracer study in a vertical flow constructed wetland treating septage</title><title>World journal of engineering</title><description>Purpose
This study aims to investigate the hydraulic behaviour of a pilot-scale, two-staged, vertical flow constructed wetland (VFCW) for septage treatment, in terms of factors such as hydraulic retention time and hydraulic loading rate and its influence on the treatment dynamics. Because of intermittent feeding mode of VFCW systems and variation in its loading, its hydraulic behaviour is highly variable and need to be understood to optimize its treatment performance.
Design/methodology/approach
Tracer test were carried out using bromide ion with varying hydraulic loading rates (HLR) of 6.82 cm/d, 9.09 cm/d and 11.40 cm/d (i.e. equivalent to 75 L/d, 100L/d and 125 L/d). Tracer data is then analysed using the Residence Time Distribution (RTD) method.
Findings
RTD analysis showed that the increase in HLR increases the average hydraulic retention time (HRT). Subsequently, the increase in HLR results in a lower recovery of effluent, resulting in poor productivity in treatment. The study also showed that the removal of nitrogen and organic matter improved with increasing HRT. However, observations show no correlation between HRT and total solids removal.
Originality/value
A performance evaluation method (by tracer) is proposed to understand the hydraulics of flow in constructed wetlands, which has not been widely studied. Additionally, the dynamics of treatment in VFCWs treating septage may also be revealed by the tracer method. The study can be applied to any constructed wetlands designed for treatment of wastewater, septage or sludge.</description><subject>Design optimization</subject><subject>Efficiency</subject><subject>Effluents</subject><subject>Fluid flow</subject><subject>Hydraulic loading</subject><subject>Hydraulic retention time</subject><subject>Hydraulics</subject><subject>Loading rate</subject><subject>Organic matter</subject><subject>Performance evaluation</subject><subject>Residence time distribution</subject><subject>Sludge</subject><subject>Wastewater treatment</subject><subject>Wetlands</subject><issn>1708-5284</issn><issn>2515-8082</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNptkD1rwzAURUVpoSHN3lHQWc17smzJYwhJPwh0aekoZFkKDo6dSnJD_n0d0qXQu7zlnnfhEHKP8IgIav75umJQMg4oGWRQXJEJzzFnChS_JhOUoFjOlbglsxh3MEYUHGU2IesFTcFYF2hMQ32iTUcN_XYhNda01Lf9kdq-iykMNrmaHl1qTVePjDOp6bY0ukMyW3dHbrxpo5v93in5WK_el89s8_b0slxsmM3yLLHKQiklAlbcSjC18lxI7yqHQmIpKoOFlRIKzkWBiLnPveQilyjAe2N5NiUPl7-H0H8NLia964fQjZOalxw4qqxQYwsuLRv6GIPz-hCavQknjaDPwvQoTEOpz8L0WdiIzC-I27tg2vo_4o_i7AcfhWpk</recordid><startdate>20180611</startdate><enddate>20180611</enddate><creator>Bui, Jason Jie Xiang</creator><creator>Tan, Yee Yong</creator><creator>Tang, Fu Ee</creator><creator>Ho, Carrie</creator><general>Emerald Publishing Limited</general><general>Emerald Group Publishing Limited</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope></search><sort><creationdate>20180611</creationdate><title>A tracer study in a vertical flow constructed wetland treating septage</title><author>Bui, Jason Jie Xiang ; Tan, Yee Yong ; Tang, Fu Ee ; Ho, Carrie</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c353t-bc0977101b2c70ad8f247febe147194ba16c770622461115f5f72457140ffac23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Design optimization</topic><topic>Efficiency</topic><topic>Effluents</topic><topic>Fluid flow</topic><topic>Hydraulic loading</topic><topic>Hydraulic retention time</topic><topic>Hydraulics</topic><topic>Loading rate</topic><topic>Organic matter</topic><topic>Performance evaluation</topic><topic>Residence time distribution</topic><topic>Sludge</topic><topic>Wastewater treatment</topic><topic>Wetlands</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bui, Jason Jie Xiang</creatorcontrib><creatorcontrib>Tan, Yee Yong</creatorcontrib><creatorcontrib>Tang, Fu Ee</creatorcontrib><creatorcontrib>Ho, Carrie</creatorcontrib><collection>CrossRef</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central</collection><collection>Technology Collection (ProQuest)</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering 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><jtitle>World journal of engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bui, Jason Jie Xiang</au><au>Tan, Yee Yong</au><au>Tang, Fu Ee</au><au>Ho, Carrie</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A tracer study in a vertical flow constructed wetland treating septage</atitle><jtitle>World journal of engineering</jtitle><date>2018-06-11</date><risdate>2018</risdate><volume>15</volume><issue>3</issue><spage>345</spage><epage>353</epage><pages>345-353</pages><issn>1708-5284</issn><eissn>2515-8082</eissn><abstract>Purpose
This study aims to investigate the hydraulic behaviour of a pilot-scale, two-staged, vertical flow constructed wetland (VFCW) for septage treatment, in terms of factors such as hydraulic retention time and hydraulic loading rate and its influence on the treatment dynamics. Because of intermittent feeding mode of VFCW systems and variation in its loading, its hydraulic behaviour is highly variable and need to be understood to optimize its treatment performance.
Design/methodology/approach
Tracer test were carried out using bromide ion with varying hydraulic loading rates (HLR) of 6.82 cm/d, 9.09 cm/d and 11.40 cm/d (i.e. equivalent to 75 L/d, 100L/d and 125 L/d). Tracer data is then analysed using the Residence Time Distribution (RTD) method.
Findings
RTD analysis showed that the increase in HLR increases the average hydraulic retention time (HRT). Subsequently, the increase in HLR results in a lower recovery of effluent, resulting in poor productivity in treatment. The study also showed that the removal of nitrogen and organic matter improved with increasing HRT. However, observations show no correlation between HRT and total solids removal.
Originality/value
A performance evaluation method (by tracer) is proposed to understand the hydraulics of flow in constructed wetlands, which has not been widely studied. Additionally, the dynamics of treatment in VFCWs treating septage may also be revealed by the tracer method. The study can be applied to any constructed wetlands designed for treatment of wastewater, septage or sludge.</abstract><cop>Brentwood</cop><pub>Emerald Publishing Limited</pub><doi>10.1108/WJE-09-2017-0306</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | World journal of engineering, 2018-06, Vol.15 (3), p.345-353 |
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| source | Emerald A-Z Current Journals; Standard: Emerald eJournal Premier Collection |
| subjects | Design optimization Efficiency Effluents Fluid flow Hydraulic loading Hydraulic retention time Hydraulics Loading rate Organic matter Performance evaluation Residence time distribution Sludge Wastewater treatment Wetlands |
| title | A tracer study in a vertical flow constructed wetland treating septage |
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