Enhancement of sludge dewaterability by repeated inoculation of acidified sludge: Extracellular polymeric substances molecular structure and microbial community succession
Improving the dewatering performance of sewage sludge is of great scientific and engineering significance in the context of accelerated urbanization and increasingly strict environmental regulations. Acidified sludge (AS) can improve sludge dewatering performance, but the dewatering effect of repeat...
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| Veröffentlicht in: | Chemosphere (Oxford) 2023-10, Vol.339, p.139714-139714, Article 139714 |
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| creator | Li, Yunbei Fu, Chunyan Cao, Xinyu Wang, Xin Wang, Ninghao Zheng, Mengyu Quan, Lijun Lv, Jinghua Guo, Zhensheng |
| description | Improving the dewatering performance of sewage sludge is of great scientific and engineering significance in the context of accelerated urbanization and increasingly strict environmental regulations. Acidified sludge (AS) can improve sludge dewatering performance, but the dewatering effect of repeated inoculation is unclear. The effects of long-term repeated inoculation of AS on the sludge dewaterability were investigated. The molecular structure and microbial community succession of extracellular polymeric substances (EPS) are emphasized. The results revealed that increasing the inoculation ratio of AS reduced the pH, absolute value of sludge zeta potential, and sludge particle size, and the decreasing trend was more evident with prolonging treatment time. Under the conditions of 30% and 50% AS inoculation, the dewatering performance of the sludge was significantly improved (p |
| doi_str_mv | 10.1016/j.chemosphere.2023.139714 |
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[Display omitted]
•Repeated inoculation of acidified sludge (AS) during bioleaching was studied.•Dewatering effect was stable after 30 times of 30% or 50% AS inoculated.•Protein in tightly bound EPS was significantly related to sludge dewaterability.•Reduced protein secondary structure of α-helix facilitated sludge dewatering.•Repeated inoculation did not destroy microbial community structure of AS.</description><identifier>ISSN: 0045-6535</identifier><identifier>EISSN: 1879-1298</identifier><identifier>DOI: 10.1016/j.chemosphere.2023.139714</identifier><identifier>PMID: 37543234</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>Acidified sludge ; Extracellular polymeric substances ; Microbial community ; Sewage sludge ; Sludge dewaterability</subject><ispartof>Chemosphere (Oxford), 2023-10, Vol.339, p.139714-139714, Article 139714</ispartof><rights>2023 Elsevier Ltd</rights><rights>Copyright © 2023 Elsevier Ltd. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c292t-9f86af824f4bb069815a1d73abccaa61131b519678024cec8ef996d69d579cd83</citedby><cites>FETCH-LOGICAL-c292t-9f86af824f4bb069815a1d73abccaa61131b519678024cec8ef996d69d579cd83</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.chemosphere.2023.139714$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>315,782,786,3552,27931,27932,46002</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/37543234$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Li, Yunbei</creatorcontrib><creatorcontrib>Fu, Chunyan</creatorcontrib><creatorcontrib>Cao, Xinyu</creatorcontrib><creatorcontrib>Wang, Xin</creatorcontrib><creatorcontrib>Wang, Ninghao</creatorcontrib><creatorcontrib>Zheng, Mengyu</creatorcontrib><creatorcontrib>Quan, Lijun</creatorcontrib><creatorcontrib>Lv, Jinghua</creatorcontrib><creatorcontrib>Guo, Zhensheng</creatorcontrib><title>Enhancement of sludge dewaterability by repeated inoculation of acidified sludge: Extracellular polymeric substances molecular structure and microbial community succession</title><title>Chemosphere (Oxford)</title><addtitle>Chemosphere</addtitle><description>Improving the dewatering performance of sewage sludge is of great scientific and engineering significance in the context of accelerated urbanization and increasingly strict environmental regulations. Acidified sludge (AS) can improve sludge dewatering performance, but the dewatering effect of repeated inoculation is unclear. The effects of long-term repeated inoculation of AS on the sludge dewaterability were investigated. The molecular structure and microbial community succession of extracellular polymeric substances (EPS) are emphasized. The results revealed that increasing the inoculation ratio of AS reduced the pH, absolute value of sludge zeta potential, and sludge particle size, and the decreasing trend was more evident with prolonging treatment time. Under the conditions of 30% and 50% AS inoculation, the dewatering performance of the sludge was significantly improved (p < 0.05). Compared with the raw sludge, the specific resistance of filtration (SRF) and capillary suction time of 30% inoculation were reduced by 64.3% and 50.1% after 30 cycles, respectively. Excluding loosely bound (LB)-EPS, soluble (S)-EPS and tightly bound (TB)-EPS exhibited a visible decrease, the protein in TB-EPS was significantly related to sludge dewaterability (p < 0.05). The fluorescent components of aromatic protein and fulvic acid-like substances in TB-EPS were significantly associated with SRF, with a correlation coefficient 0.99 (p < 0.05). Both the increase in the percentages of random coil and decrease in α-helix in TB-EPS contributed to improving dewaterability. Increasing Firmicutes and decreasing Chloroflexi levels improved the sludge dewatering capacity. Repeated inoculation did not disrupt the dewatering effect of AS rather increased the feasibility of the engineering application of AS. Considering the dewatering performance and cost synthetically, 30% AS inoculated ratio is feasible for practical applications.
[Display omitted]
•Repeated inoculation of acidified sludge (AS) during bioleaching was studied.•Dewatering effect was stable after 30 times of 30% or 50% AS inoculated.•Protein in tightly bound EPS was significantly related to sludge dewaterability.•Reduced protein secondary structure of α-helix facilitated sludge dewatering.•Repeated inoculation did not destroy microbial community structure of AS.</description><subject>Acidified sludge</subject><subject>Extracellular polymeric substances</subject><subject>Microbial community</subject><subject>Sewage sludge</subject><subject>Sludge dewaterability</subject><issn>0045-6535</issn><issn>1879-1298</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNqNkcuO1DAQRS0EYpqBX0BmxyaNH4kTs0Ot5iGNxAbWlmNXaLfiOPgB9Dfxkzj0gFiyslR1j29VXYReULKnhIpX5705gQ9pPUGEPSOM7ymXPW0foB0detlQJoeHaEdI2zWi490NepLSmZAKd_IxuuF913LG2x36eVxOejHgYck4TDjNxX4BbOG7zhD16GaXL3i84Agr1JLFbgmmzDq7sGyANs66ydXGFX2Njz9y1AbmuaoiXsN88RCdwamMKW9eCfswg_ndTjkWk0sErBeLvTMxjE7P2ATvy7J5p2IqkqrdU_Ro0nOCZ_fvLfr89vjp8L65-_juw-HNXWOYZLmR0yD0NLB2aseRCDnQTlPbcz0ao7WglNOxo1L0A2GtATPAJKWwQtqul8YO_Ba9vP67xvC1QMrKu7QtpBcIJSk2tEIyIbmoUnmV1rlTijCpNTqv40VRoras1Fn9k5XaslLXrCr7_N6mjB7sX_JPOFVwuAqgLvvNQVTJOKgHtC6CycoG9x82vwCq4LHF</recordid><startdate>20231001</startdate><enddate>20231001</enddate><creator>Li, Yunbei</creator><creator>Fu, Chunyan</creator><creator>Cao, Xinyu</creator><creator>Wang, Xin</creator><creator>Wang, Ninghao</creator><creator>Zheng, Mengyu</creator><creator>Quan, Lijun</creator><creator>Lv, Jinghua</creator><creator>Guo, Zhensheng</creator><general>Elsevier Ltd</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20231001</creationdate><title>Enhancement of sludge dewaterability by repeated inoculation of acidified sludge: Extracellular polymeric substances molecular structure and microbial community succession</title><author>Li, Yunbei ; Fu, Chunyan ; Cao, Xinyu ; Wang, Xin ; Wang, Ninghao ; Zheng, Mengyu ; Quan, Lijun ; Lv, Jinghua ; Guo, Zhensheng</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c292t-9f86af824f4bb069815a1d73abccaa61131b519678024cec8ef996d69d579cd83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Acidified sludge</topic><topic>Extracellular polymeric substances</topic><topic>Microbial community</topic><topic>Sewage sludge</topic><topic>Sludge dewaterability</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Yunbei</creatorcontrib><creatorcontrib>Fu, Chunyan</creatorcontrib><creatorcontrib>Cao, Xinyu</creatorcontrib><creatorcontrib>Wang, Xin</creatorcontrib><creatorcontrib>Wang, Ninghao</creatorcontrib><creatorcontrib>Zheng, Mengyu</creatorcontrib><creatorcontrib>Quan, Lijun</creatorcontrib><creatorcontrib>Lv, Jinghua</creatorcontrib><creatorcontrib>Guo, Zhensheng</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Chemosphere (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Yunbei</au><au>Fu, Chunyan</au><au>Cao, Xinyu</au><au>Wang, Xin</au><au>Wang, Ninghao</au><au>Zheng, Mengyu</au><au>Quan, Lijun</au><au>Lv, Jinghua</au><au>Guo, Zhensheng</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Enhancement of sludge dewaterability by repeated inoculation of acidified sludge: Extracellular polymeric substances molecular structure and microbial community succession</atitle><jtitle>Chemosphere (Oxford)</jtitle><addtitle>Chemosphere</addtitle><date>2023-10-01</date><risdate>2023</risdate><volume>339</volume><spage>139714</spage><epage>139714</epage><pages>139714-139714</pages><artnum>139714</artnum><issn>0045-6535</issn><eissn>1879-1298</eissn><abstract>Improving the dewatering performance of sewage sludge is of great scientific and engineering significance in the context of accelerated urbanization and increasingly strict environmental regulations. Acidified sludge (AS) can improve sludge dewatering performance, but the dewatering effect of repeated inoculation is unclear. The effects of long-term repeated inoculation of AS on the sludge dewaterability were investigated. The molecular structure and microbial community succession of extracellular polymeric substances (EPS) are emphasized. The results revealed that increasing the inoculation ratio of AS reduced the pH, absolute value of sludge zeta potential, and sludge particle size, and the decreasing trend was more evident with prolonging treatment time. Under the conditions of 30% and 50% AS inoculation, the dewatering performance of the sludge was significantly improved (p < 0.05). Compared with the raw sludge, the specific resistance of filtration (SRF) and capillary suction time of 30% inoculation were reduced by 64.3% and 50.1% after 30 cycles, respectively. Excluding loosely bound (LB)-EPS, soluble (S)-EPS and tightly bound (TB)-EPS exhibited a visible decrease, the protein in TB-EPS was significantly related to sludge dewaterability (p < 0.05). The fluorescent components of aromatic protein and fulvic acid-like substances in TB-EPS were significantly associated with SRF, with a correlation coefficient 0.99 (p < 0.05). Both the increase in the percentages of random coil and decrease in α-helix in TB-EPS contributed to improving dewaterability. Increasing Firmicutes and decreasing Chloroflexi levels improved the sludge dewatering capacity. Repeated inoculation did not disrupt the dewatering effect of AS rather increased the feasibility of the engineering application of AS. Considering the dewatering performance and cost synthetically, 30% AS inoculated ratio is feasible for practical applications.
[Display omitted]
•Repeated inoculation of acidified sludge (AS) during bioleaching was studied.•Dewatering effect was stable after 30 times of 30% or 50% AS inoculated.•Protein in tightly bound EPS was significantly related to sludge dewaterability.•Reduced protein secondary structure of α-helix facilitated sludge dewatering.•Repeated inoculation did not destroy microbial community structure of AS.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>37543234</pmid><doi>10.1016/j.chemosphere.2023.139714</doi><tpages>1</tpages></addata></record> |
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| subjects | Acidified sludge Extracellular polymeric substances Microbial community Sewage sludge Sludge dewaterability |
| title | Enhancement of sludge dewaterability by repeated inoculation of acidified sludge: Extracellular polymeric substances molecular structure and microbial community succession |
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