Cultivation of aerobic granular sludge for the treatment of food-processing wastewater and the impact on membrane filtration properties
A laboratory-scale sequencing batch reactor was operated for approximately 300 days, divided into four periods based on the feeding strategy, to develop stable aerobic granular sludge (AGS) while treating chocolate processing wastewater. Application of a prolonged mixed anaerobic feeding was not suf...
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| description | A laboratory-scale sequencing batch reactor was operated for approximately 300 days, divided into four periods based on the feeding strategy, to develop stable aerobic granular sludge (AGS) while treating chocolate processing wastewater. Application of a prolonged mixed anaerobic feeding was not sufficient to develop AGS and reach stable reactor performance. Through the application of a partially non-mixed and a partially mixed feeding strategy, the reactor performance was increased and stable AGS formation was established characterized by low diluted sludge volume index (D)SVI DSVI
) values of 78 ± 27 mL·g
and 52 ± 17 mL·g
, respectively, and a capillary suction time/mixed liquor suspended solids value of 0.9 sec·(g·L
)
. The membrane bioreactor (MBR) filtration tests showed a reduction of the fouling rate (FR) and an increase of the sustainable flux (SF
) for AGS compared to flocs treating the same industrial wastewater. The SF
(FR > 0.5 mbar·min
) for the flocs was 10 L·(m
·h)
while for AGS the SF
is higher than 45 L·(m
·h)
because the FR did not exceed 0.1 mbar·min
. Additionally, the AGS showed reduced irreversible fouling tendencies due to pore blocking. Our results underline the need for an increased substrate gradient during anaerobic feeding for the development and long-term maintenance of AGS under minimum wash-out conditions. The AGS-MBR filtration performance also shows strong advantages compared to a floccular MBR system due to a high increase of the SF
and reduced reversible and irreversible fouling. |
| doi_str_mv | 10.2166/wst.2020.531 |
| format | Article |
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) values of 78 ± 27 mL·g
and 52 ± 17 mL·g
, respectively, and a capillary suction time/mixed liquor suspended solids value of 0.9 sec·(g·L
)
. The membrane bioreactor (MBR) filtration tests showed a reduction of the fouling rate (FR) and an increase of the sustainable flux (SF
) for AGS compared to flocs treating the same industrial wastewater. The SF
(FR > 0.5 mbar·min
) for the flocs was 10 L·(m
·h)
while for AGS the SF
is higher than 45 L·(m
·h)
because the FR did not exceed 0.1 mbar·min
. Additionally, the AGS showed reduced irreversible fouling tendencies due to pore blocking. Our results underline the need for an increased substrate gradient during anaerobic feeding for the development and long-term maintenance of AGS under minimum wash-out conditions. The AGS-MBR filtration performance also shows strong advantages compared to a floccular MBR system due to a high increase of the SF
and reduced reversible and irreversible fouling.</description><identifier>ISSN: 0273-1223</identifier><identifier>EISSN: 1996-9732</identifier><identifier>DOI: 10.2166/wst.2020.531</identifier><identifier>PMID: 33460405</identifier><language>eng</language><publisher>England: IWA Publishing</publisher><subject>Anaerobic processes ; Batch reactors ; Bioreactors ; Chemical oxygen demand ; Chocolate ; Cultivation ; Effluents ; Experiments ; Famine ; Feeding ; Filtration ; Food industries wastewaters ; Food processing ; Fouling ; Hydraulics ; Industrial wastes ; Industrial wastewater ; Laboratories ; Membrane filtration ; Membranes ; Membranes, Artificial ; Nutrient removal ; Particle size ; Process controls ; Reactors ; Sewage ; Sludge ; Sludge volume index ; Solid suspensions ; Substrates ; Suction ; Suspended particulate matter ; Suspended solids ; Waste Disposal, Fluid ; Waste Water ; Wastewater ; Wastewater treatment ; Water treatment</subject><ispartof>Water science and technology, 2021-01, Vol.83 (1), p.39-51</ispartof><rights>Copyright IWA Publishing Jan 2021</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c357t-7b2870fd06788ca054d0902de967c7c4d7ea8ec0da217dc055e03c2cfee573993</citedby><cites>FETCH-LOGICAL-c357t-7b2870fd06788ca054d0902de967c7c4d7ea8ec0da217dc055e03c2cfee573993</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,860,27903,27904</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33460405$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Stes, H</creatorcontrib><creatorcontrib>Caluwé, M</creatorcontrib><creatorcontrib>Dockx, L</creatorcontrib><creatorcontrib>Cornelissen, R</creatorcontrib><creatorcontrib>De Langhe, P</creatorcontrib><creatorcontrib>Smets, I</creatorcontrib><creatorcontrib>Dries, J</creatorcontrib><title>Cultivation of aerobic granular sludge for the treatment of food-processing wastewater and the impact on membrane filtration properties</title><title>Water science and technology</title><addtitle>Water Sci Technol</addtitle><description>A laboratory-scale sequencing batch reactor was operated for approximately 300 days, divided into four periods based on the feeding strategy, to develop stable aerobic granular sludge (AGS) while treating chocolate processing wastewater. Application of a prolonged mixed anaerobic feeding was not sufficient to develop AGS and reach stable reactor performance. Through the application of a partially non-mixed and a partially mixed feeding strategy, the reactor performance was increased and stable AGS formation was established characterized by low diluted sludge volume index (D)SVI DSVI
) values of 78 ± 27 mL·g
and 52 ± 17 mL·g
, respectively, and a capillary suction time/mixed liquor suspended solids value of 0.9 sec·(g·L
)
. The membrane bioreactor (MBR) filtration tests showed a reduction of the fouling rate (FR) and an increase of the sustainable flux (SF
) for AGS compared to flocs treating the same industrial wastewater. The SF
(FR > 0.5 mbar·min
) for the flocs was 10 L·(m
·h)
while for AGS the SF
is higher than 45 L·(m
·h)
because the FR did not exceed 0.1 mbar·min
. Additionally, the AGS showed reduced irreversible fouling tendencies due to pore blocking. Our results underline the need for an increased substrate gradient during anaerobic feeding for the development and long-term maintenance of AGS under minimum wash-out conditions. The AGS-MBR filtration performance also shows strong advantages compared to a floccular MBR system due to a high increase of the SF
and reduced reversible and irreversible fouling.</description><subject>Anaerobic processes</subject><subject>Batch reactors</subject><subject>Bioreactors</subject><subject>Chemical oxygen demand</subject><subject>Chocolate</subject><subject>Cultivation</subject><subject>Effluents</subject><subject>Experiments</subject><subject>Famine</subject><subject>Feeding</subject><subject>Filtration</subject><subject>Food industries wastewaters</subject><subject>Food processing</subject><subject>Fouling</subject><subject>Hydraulics</subject><subject>Industrial wastes</subject><subject>Industrial wastewater</subject><subject>Laboratories</subject><subject>Membrane filtration</subject><subject>Membranes</subject><subject>Membranes, Artificial</subject><subject>Nutrient removal</subject><subject>Particle size</subject><subject>Process controls</subject><subject>Reactors</subject><subject>Sewage</subject><subject>Sludge</subject><subject>Sludge volume index</subject><subject>Solid suspensions</subject><subject>Substrates</subject><subject>Suction</subject><subject>Suspended particulate matter</subject><subject>Suspended solids</subject><subject>Waste Disposal, Fluid</subject><subject>Waste Water</subject><subject>Wastewater</subject><subject>Wastewater treatment</subject><subject>Water 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J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Cultivation of aerobic granular sludge for the treatment of food-processing wastewater and the impact on membrane filtration properties</atitle><jtitle>Water science and technology</jtitle><addtitle>Water Sci Technol</addtitle><date>2021-01</date><risdate>2021</risdate><volume>83</volume><issue>1</issue><spage>39</spage><epage>51</epage><pages>39-51</pages><issn>0273-1223</issn><eissn>1996-9732</eissn><abstract>A laboratory-scale sequencing batch reactor was operated for approximately 300 days, divided into four periods based on the feeding strategy, to develop stable aerobic granular sludge (AGS) while treating chocolate processing wastewater. Application of a prolonged mixed anaerobic feeding was not sufficient to develop AGS and reach stable reactor performance. Through the application of a partially non-mixed and a partially mixed feeding strategy, the reactor performance was increased and stable AGS formation was established characterized by low diluted sludge volume index (D)SVI DSVI
) values of 78 ± 27 mL·g
and 52 ± 17 mL·g
, respectively, and a capillary suction time/mixed liquor suspended solids value of 0.9 sec·(g·L
)
. The membrane bioreactor (MBR) filtration tests showed a reduction of the fouling rate (FR) and an increase of the sustainable flux (SF
) for AGS compared to flocs treating the same industrial wastewater. The SF
(FR > 0.5 mbar·min
) for the flocs was 10 L·(m
·h)
while for AGS the SF
is higher than 45 L·(m
·h)
because the FR did not exceed 0.1 mbar·min
. Additionally, the AGS showed reduced irreversible fouling tendencies due to pore blocking. Our results underline the need for an increased substrate gradient during anaerobic feeding for the development and long-term maintenance of AGS under minimum wash-out conditions. The AGS-MBR filtration performance also shows strong advantages compared to a floccular MBR system due to a high increase of the SF
and reduced reversible and irreversible fouling.</abstract><cop>England</cop><pub>IWA Publishing</pub><pmid>33460405</pmid><doi>10.2166/wst.2020.531</doi><tpages>13</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0273-1223 |
| ispartof | Water science and technology, 2021-01, Vol.83 (1), p.39-51 |
| issn | 0273-1223 1996-9732 |
| language | eng |
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| source | MEDLINE; DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Anaerobic processes Batch reactors Bioreactors Chemical oxygen demand Chocolate Cultivation Effluents Experiments Famine Feeding Filtration Food industries wastewaters Food processing Fouling Hydraulics Industrial wastes Industrial wastewater Laboratories Membrane filtration Membranes Membranes, Artificial Nutrient removal Particle size Process controls Reactors Sewage Sludge Sludge volume index Solid suspensions Substrates Suction Suspended particulate matter Suspended solids Waste Disposal, Fluid Waste Water Wastewater Wastewater treatment Water treatment |
| title | Cultivation of aerobic granular sludge for the treatment of food-processing wastewater and the impact on membrane filtration properties |
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