Improved volatile fatty acid production during waste activated sludge anaerobic fermentation by different bio-surfactants
[Display omitted] •Evaluated the effects of three bio-surfactants on VFA production.•VFAs was increased from 75 to about 300gCOD/gVSS using the bio-surfactants.•EEM fluorescence spectroscopy was used to characterize dissolved organic matters.•Sludge solubilization and hydrolysis were improved in var...
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| Veröffentlicht in: | Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2015-03, Vol.264, p.280-290 |
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| container_title | Chemical engineering journal (Lausanne, Switzerland : 1996) |
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| creator | Huang, Xiangfeng Shen, Changming Liu, Jia Lu, Lijun |
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•Evaluated the effects of three bio-surfactants on VFA production.•VFAs was increased from 75 to about 300gCOD/gVSS using the bio-surfactants.•EEM fluorescence spectroscopy was used to characterize dissolved organic matters.•Sludge solubilization and hydrolysis were improved in various degrees.•Methanogenesis inhibition by rhamnolipid and degradation of saponin both led to VFAs.
The application of chemical surfactants in the production of volatile fatty acids (VFAs) during sludge anaerobic fermentation has drawn wide attentions. Compared with chemosynthetic surfactants, bio-surfactants are readily biodegradable and thus have a low negative impact on the environment. This paper studied the effects of three types of bio-surfactants (surfactin, rhamnolipid and saponin) on VFA production during sludge anaerobic fermentation. The release of nitrogen and phosphorus was also observed. Dissolution of organic matters, fluorescence spectra of filtrates, key enzyme activities, surface activity and biodegradation of the bio-surfactants were analyzed to reveal the mechanisms. The results indicated that VFA production was increased to approximately 4-fold versus the blank (75mgCOD/gVSS) using surfactin, rhamnolipid and saponin at the dosage of 0.05, 0.05, 0.10g/g DS, respectively. However, some differences existed in their mechanisms of improved acid production. Surfactin mainly increased the dissolution of organic matters to reach a high VFA accumulation. Rhamnolipid also enhanced the dissolution but inhibited the methanogenesis. In addition, its effects on microbial activities limited the further improvement of VFA production. Despite a lower surface activity than the other two bio-surfactants, saponin showed a similar improvement of VFA production through its self-degradation. |
| doi_str_mv | 10.1016/j.cej.2014.11.078 |
| format | Article |
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•Evaluated the effects of three bio-surfactants on VFA production.•VFAs was increased from 75 to about 300gCOD/gVSS using the bio-surfactants.•EEM fluorescence spectroscopy was used to characterize dissolved organic matters.•Sludge solubilization and hydrolysis were improved in various degrees.•Methanogenesis inhibition by rhamnolipid and degradation of saponin both led to VFAs.
The application of chemical surfactants in the production of volatile fatty acids (VFAs) during sludge anaerobic fermentation has drawn wide attentions. Compared with chemosynthetic surfactants, bio-surfactants are readily biodegradable and thus have a low negative impact on the environment. This paper studied the effects of three types of bio-surfactants (surfactin, rhamnolipid and saponin) on VFA production during sludge anaerobic fermentation. The release of nitrogen and phosphorus was also observed. Dissolution of organic matters, fluorescence spectra of filtrates, key enzyme activities, surface activity and biodegradation of the bio-surfactants were analyzed to reveal the mechanisms. The results indicated that VFA production was increased to approximately 4-fold versus the blank (75mgCOD/gVSS) using surfactin, rhamnolipid and saponin at the dosage of 0.05, 0.05, 0.10g/g DS, respectively. However, some differences existed in their mechanisms of improved acid production. Surfactin mainly increased the dissolution of organic matters to reach a high VFA accumulation. Rhamnolipid also enhanced the dissolution but inhibited the methanogenesis. In addition, its effects on microbial activities limited the further improvement of VFA production. Despite a lower surface activity than the other two bio-surfactants, saponin showed a similar improvement of VFA production through its self-degradation.</description><identifier>ISSN: 1385-8947</identifier><identifier>EISSN: 1873-3212</identifier><identifier>DOI: 10.1016/j.cej.2014.11.078</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Anaerobic fermentation ; Bio-surfactants ; Dissolution ; Excitation–emission matrix (EEM) fluorescence spectroscopy ; Fatty acids ; Fermentation ; Rhamnolipids ; Saponins ; Sludge ; Surfactants ; Surfactin ; Volatile fatty acids (VFAs) ; Waste activated sludge</subject><ispartof>Chemical engineering journal (Lausanne, Switzerland : 1996), 2015-03, Vol.264, p.280-290</ispartof><rights>2014 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c466t-f75d9fd5db1c4d1f229a3439be5e9b27028b1ebf86a34d0bd5e69dbd9f116f7e3</citedby><cites>FETCH-LOGICAL-c466t-f75d9fd5db1c4d1f229a3439be5e9b27028b1ebf86a34d0bd5e69dbd9f116f7e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.cej.2014.11.078$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>315,781,785,3551,27926,27927,45997</link.rule.ids></links><search><creatorcontrib>Huang, Xiangfeng</creatorcontrib><creatorcontrib>Shen, Changming</creatorcontrib><creatorcontrib>Liu, Jia</creatorcontrib><creatorcontrib>Lu, Lijun</creatorcontrib><title>Improved volatile fatty acid production during waste activated sludge anaerobic fermentation by different bio-surfactants</title><title>Chemical engineering journal (Lausanne, Switzerland : 1996)</title><description>[Display omitted]
•Evaluated the effects of three bio-surfactants on VFA production.•VFAs was increased from 75 to about 300gCOD/gVSS using the bio-surfactants.•EEM fluorescence spectroscopy was used to characterize dissolved organic matters.•Sludge solubilization and hydrolysis were improved in various degrees.•Methanogenesis inhibition by rhamnolipid and degradation of saponin both led to VFAs.
The application of chemical surfactants in the production of volatile fatty acids (VFAs) during sludge anaerobic fermentation has drawn wide attentions. Compared with chemosynthetic surfactants, bio-surfactants are readily biodegradable and thus have a low negative impact on the environment. This paper studied the effects of three types of bio-surfactants (surfactin, rhamnolipid and saponin) on VFA production during sludge anaerobic fermentation. The release of nitrogen and phosphorus was also observed. Dissolution of organic matters, fluorescence spectra of filtrates, key enzyme activities, surface activity and biodegradation of the bio-surfactants were analyzed to reveal the mechanisms. The results indicated that VFA production was increased to approximately 4-fold versus the blank (75mgCOD/gVSS) using surfactin, rhamnolipid and saponin at the dosage of 0.05, 0.05, 0.10g/g DS, respectively. However, some differences existed in their mechanisms of improved acid production. Surfactin mainly increased the dissolution of organic matters to reach a high VFA accumulation. Rhamnolipid also enhanced the dissolution but inhibited the methanogenesis. In addition, its effects on microbial activities limited the further improvement of VFA production. Despite a lower surface activity than the other two bio-surfactants, saponin showed a similar improvement of VFA production through its self-degradation.</description><subject>Anaerobic fermentation</subject><subject>Bio-surfactants</subject><subject>Dissolution</subject><subject>Excitation–emission matrix (EEM) fluorescence spectroscopy</subject><subject>Fatty acids</subject><subject>Fermentation</subject><subject>Rhamnolipids</subject><subject>Saponins</subject><subject>Sludge</subject><subject>Surfactants</subject><subject>Surfactin</subject><subject>Volatile fatty acids (VFAs)</subject><subject>Waste activated sludge</subject><issn>1385-8947</issn><issn>1873-3212</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqNkUtPwzAQhCMEEqXwA7j5yCXBm4fjiBOqeFSqxAXOlh_rylWaFNsp6r_HpZwRp13NzrfSaLLsFmgBFNj9ptC4KUoKdQFQ0JafZTPgbZVXJZTnaa94k_Oubi-zqxA2lFLWQTfLDsvtzo97NGQ_9jK6HomVMR6I1M6QdDKTjm4ciJm8G9bkS4aI6RjdXsZEhX4y6yQMEv2onCYW_RaHKH8gdSDG2SQlhSg35mHyNsFyiOE6u7CyD3jzO-fZx_PT--I1X729LBePq1zXjMXcto3prGmMAl0bsGXZyaquOoUNdqpsackVoLKcJdlQZRpknVGJAWC2xWqe3Z3-pjCfE4Yoti5o7Hs54DgFAYw3bVtxXv_DymhN66ZhyQonq_ZjCB6t2Hm3lf4ggIpjI2IjUiPi2IgAEKmRxDycGExx9w69CNrhoNE4jzoKM7o_6G9bkJdU</recordid><startdate>20150315</startdate><enddate>20150315</enddate><creator>Huang, Xiangfeng</creator><creator>Shen, Changming</creator><creator>Liu, Jia</creator><creator>Lu, Lijun</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QH</scope><scope>7QO</scope><scope>7ST</scope><scope>7TV</scope><scope>7UA</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H97</scope><scope>L.G</scope><scope>P64</scope><scope>SOI</scope><scope>7SR</scope><scope>JG9</scope></search><sort><creationdate>20150315</creationdate><title>Improved volatile fatty acid production during waste activated sludge anaerobic fermentation by different bio-surfactants</title><author>Huang, Xiangfeng ; Shen, Changming ; Liu, Jia ; Lu, Lijun</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c466t-f75d9fd5db1c4d1f229a3439be5e9b27028b1ebf86a34d0bd5e69dbd9f116f7e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Anaerobic fermentation</topic><topic>Bio-surfactants</topic><topic>Dissolution</topic><topic>Excitation–emission matrix (EEM) fluorescence spectroscopy</topic><topic>Fatty acids</topic><topic>Fermentation</topic><topic>Rhamnolipids</topic><topic>Saponins</topic><topic>Sludge</topic><topic>Surfactants</topic><topic>Surfactin</topic><topic>Volatile fatty acids (VFAs)</topic><topic>Waste activated sludge</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Huang, Xiangfeng</creatorcontrib><creatorcontrib>Shen, Changming</creatorcontrib><creatorcontrib>Liu, Jia</creatorcontrib><creatorcontrib>Lu, Lijun</creatorcontrib><collection>CrossRef</collection><collection>Aqualine</collection><collection>Biotechnology Research Abstracts</collection><collection>Environment Abstracts</collection><collection>Pollution Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 3: Aquatic Pollution & Environmental Quality</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environment Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Materials Research Database</collection><jtitle>Chemical engineering journal (Lausanne, Switzerland : 1996)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Huang, Xiangfeng</au><au>Shen, Changming</au><au>Liu, Jia</au><au>Lu, Lijun</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Improved volatile fatty acid production during waste activated sludge anaerobic fermentation by different bio-surfactants</atitle><jtitle>Chemical engineering journal (Lausanne, Switzerland : 1996)</jtitle><date>2015-03-15</date><risdate>2015</risdate><volume>264</volume><spage>280</spage><epage>290</epage><pages>280-290</pages><issn>1385-8947</issn><eissn>1873-3212</eissn><abstract>[Display omitted]
•Evaluated the effects of three bio-surfactants on VFA production.•VFAs was increased from 75 to about 300gCOD/gVSS using the bio-surfactants.•EEM fluorescence spectroscopy was used to characterize dissolved organic matters.•Sludge solubilization and hydrolysis were improved in various degrees.•Methanogenesis inhibition by rhamnolipid and degradation of saponin both led to VFAs.
The application of chemical surfactants in the production of volatile fatty acids (VFAs) during sludge anaerobic fermentation has drawn wide attentions. Compared with chemosynthetic surfactants, bio-surfactants are readily biodegradable and thus have a low negative impact on the environment. This paper studied the effects of three types of bio-surfactants (surfactin, rhamnolipid and saponin) on VFA production during sludge anaerobic fermentation. The release of nitrogen and phosphorus was also observed. Dissolution of organic matters, fluorescence spectra of filtrates, key enzyme activities, surface activity and biodegradation of the bio-surfactants were analyzed to reveal the mechanisms. The results indicated that VFA production was increased to approximately 4-fold versus the blank (75mgCOD/gVSS) using surfactin, rhamnolipid and saponin at the dosage of 0.05, 0.05, 0.10g/g DS, respectively. However, some differences existed in their mechanisms of improved acid production. Surfactin mainly increased the dissolution of organic matters to reach a high VFA accumulation. Rhamnolipid also enhanced the dissolution but inhibited the methanogenesis. In addition, its effects on microbial activities limited the further improvement of VFA production. Despite a lower surface activity than the other two bio-surfactants, saponin showed a similar improvement of VFA production through its self-degradation.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.cej.2014.11.078</doi><tpages>11</tpages></addata></record> |
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| subjects | Anaerobic fermentation Bio-surfactants Dissolution Excitation–emission matrix (EEM) fluorescence spectroscopy Fatty acids Fermentation Rhamnolipids Saponins Sludge Surfactants Surfactin Volatile fatty acids (VFAs) Waste activated sludge |
| title | Improved volatile fatty acid production during waste activated sludge anaerobic fermentation by different bio-surfactants |
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