Identification of Inhibitory Substances Affecting Bioleaching of Heavy Metals from Anaerobically Digested Sewage Sludge
Significant inhibitory effects of the filtrate medium of anaerobically digested sewage sludge on iron oxidation by Acidithiobacillus ferrooxidans ANYL-1 were observed in our preliminary experiments, indicating the presence of inhibitory substances in anaerobically digested sewage sludge. The objecti...
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| Veröffentlicht in: | Environmental science & technology 2004-05, Vol.38 (10), p.2934-2939 |
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| description | Significant inhibitory effects of the filtrate medium of anaerobically digested sewage sludge on iron oxidation by Acidithiobacillus ferrooxidans ANYL-1 were observed in our preliminary experiments, indicating the presence of inhibitory substances in anaerobically digested sewage sludge. The objectives of the present study were to identify the possible inhibitory substances and to evaluate their impacts on metal solubilization during bioleaching of sewage sludge. The results showed that the concentrations of total reducing sugars, all tested metal ions, and anions were too low to suppress iron oxidation, and only organic acids, especially acetic and propionic acids, were found at concentrations higher than their inhibitory levels. The presence of 10.8 mM acetic acid and 9.88 mM propionic acid in sewage sludge (sludge N) led to long lag periods of 6 and 7 days for solubilization of Cu and Cr, respectively, as compared to a lag period of only 1 day in the control and another sludge (sludge S) with a low level of organic acids. Meanwhile the leaching time for maximum solubilization of Zn also extended to 6 days in the presence of organic acids as compared to 3 days in the control. Acetic and propionic acids posed an unfavorable bioleaching condition for anaerobically digested sewage sludge; therefore, further studies are required to explore the means to remove the inhibitory effects to improve the heavy metal bioleaching efficiency. |
| doi_str_mv | 10.1021/es0347134 |
| format | Article |
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C</creator><creatorcontrib>Gu, Xiangyang ; Wong, Jonathan W. C</creatorcontrib><description>Significant inhibitory effects of the filtrate medium of anaerobically digested sewage sludge on iron oxidation by Acidithiobacillus ferrooxidans ANYL-1 were observed in our preliminary experiments, indicating the presence of inhibitory substances in anaerobically digested sewage sludge. The objectives of the present study were to identify the possible inhibitory substances and to evaluate their impacts on metal solubilization during bioleaching of sewage sludge. The results showed that the concentrations of total reducing sugars, all tested metal ions, and anions were too low to suppress iron oxidation, and only organic acids, especially acetic and propionic acids, were found at concentrations higher than their inhibitory levels. The presence of 10.8 mM acetic acid and 9.88 mM propionic acid in sewage sludge (sludge N) led to long lag periods of 6 and 7 days for solubilization of Cu and Cr, respectively, as compared to a lag period of only 1 day in the control and another sludge (sludge S) with a low level of organic acids. Meanwhile the leaching time for maximum solubilization of Zn also extended to 6 days in the presence of organic acids as compared to 3 days in the control. Acetic and propionic acids posed an unfavorable bioleaching condition for anaerobically digested sewage sludge; therefore, further studies are required to explore the means to remove the inhibitory effects to improve the heavy metal bioleaching efficiency.</description><identifier>ISSN: 0013-936X</identifier><identifier>EISSN: 1520-5851</identifier><identifier>DOI: 10.1021/es0347134</identifier><identifier>PMID: 15212270</identifier><identifier>CODEN: ESTHAG</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Acetic Acid ; Acidithiobacillus - metabolism ; Acidithiobacillus ferrooxidans ; Acids ; Applied sciences ; Bacteria, Anaerobic - metabolism ; Biological and medical sciences ; Biological treatment of gaseous effluents ; Biotechnology ; Chromium - analysis ; Copper - analysis ; Environment and pollution ; Environmental science ; Exact sciences and technology ; Ferrous Compounds - chemistry ; Fundamental and applied biological sciences. Psychology ; Heavy metals ; Hong Kong ; Identification ; Industrial applications and implications. Economical aspects ; Iron - analysis ; Iron - chemistry ; Metals ; Other industrial wastes. Sewage sludge ; Oxidation ; Oxidation-Reduction ; Pollution ; Sewage - analysis ; Sewage - chemistry ; Sewage - microbiology ; Sewage disposal ; Sludge ; Solubility ; Wastes ; Zinc - analysis</subject><ispartof>Environmental science & technology, 2004-05, Vol.38 (10), p.2934-2939</ispartof><rights>Copyright © 2004 American Chemical Society</rights><rights>2004 INIST-CNRS</rights><rights>Copyright American Chemical Society May 15, 2004</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a505t-661a79dae1ddb43a7e138c1fc89c3de3b3a479b3961149815cd4429e68556d323</citedby><cites>FETCH-LOGICAL-a505t-661a79dae1ddb43a7e138c1fc89c3de3b3a479b3961149815cd4429e68556d323</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/es0347134$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/es0347134$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,776,780,2752,27053,27901,27902,56713,56763</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=15762785$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/15212270$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Gu, Xiangyang</creatorcontrib><creatorcontrib>Wong, Jonathan W. C</creatorcontrib><title>Identification of Inhibitory Substances Affecting Bioleaching of Heavy Metals from Anaerobically Digested Sewage Sludge</title><title>Environmental science & technology</title><addtitle>Environ. Sci. Technol</addtitle><description>Significant inhibitory effects of the filtrate medium of anaerobically digested sewage sludge on iron oxidation by Acidithiobacillus ferrooxidans ANYL-1 were observed in our preliminary experiments, indicating the presence of inhibitory substances in anaerobically digested sewage sludge. The objectives of the present study were to identify the possible inhibitory substances and to evaluate their impacts on metal solubilization during bioleaching of sewage sludge. The results showed that the concentrations of total reducing sugars, all tested metal ions, and anions were too low to suppress iron oxidation, and only organic acids, especially acetic and propionic acids, were found at concentrations higher than their inhibitory levels. The presence of 10.8 mM acetic acid and 9.88 mM propionic acid in sewage sludge (sludge N) led to long lag periods of 6 and 7 days for solubilization of Cu and Cr, respectively, as compared to a lag period of only 1 day in the control and another sludge (sludge S) with a low level of organic acids. Meanwhile the leaching time for maximum solubilization of Zn also extended to 6 days in the presence of organic acids as compared to 3 days in the control. Acetic and propionic acids posed an unfavorable bioleaching condition for anaerobically digested sewage sludge; therefore, further studies are required to explore the means to remove the inhibitory effects to improve the heavy metal bioleaching efficiency.</description><subject>Acetic Acid</subject><subject>Acidithiobacillus - metabolism</subject><subject>Acidithiobacillus ferrooxidans</subject><subject>Acids</subject><subject>Applied sciences</subject><subject>Bacteria, Anaerobic - metabolism</subject><subject>Biological and medical sciences</subject><subject>Biological treatment of gaseous effluents</subject><subject>Biotechnology</subject><subject>Chromium - analysis</subject><subject>Copper - analysis</subject><subject>Environment and pollution</subject><subject>Environmental science</subject><subject>Exact sciences and technology</subject><subject>Ferrous Compounds - chemistry</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Heavy metals</subject><subject>Hong Kong</subject><subject>Identification</subject><subject>Industrial applications and implications. Economical aspects</subject><subject>Iron - analysis</subject><subject>Iron - chemistry</subject><subject>Metals</subject><subject>Other industrial wastes. Sewage sludge</subject><subject>Oxidation</subject><subject>Oxidation-Reduction</subject><subject>Pollution</subject><subject>Sewage - analysis</subject><subject>Sewage - chemistry</subject><subject>Sewage - microbiology</subject><subject>Sewage disposal</subject><subject>Sludge</subject><subject>Solubility</subject><subject>Wastes</subject><subject>Zinc - analysis</subject><issn>0013-936X</issn><issn>1520-5851</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkUtvEzEUhS0EoqWw4A8gCwkkFgN-e2YZyqOBUpASJHaWx76TukzGxZ6h5N_jKFGDYMHKlvzd43PPQegxJS8pYfQVZMKFplzcQcdUMlLJWtK76JgQyquGq29H6EHOV4QQxkl9Hx0ViDKmyTG6mXsYxtAFZ8cQBxw7PB8uQxvGmDZ4MbV5tIODjGddB24Mwwq_DrEH6y6394Kfgf25wZ9gtH3GXYprPBsspNgWyb7f4DdhBXkEjxdwY1eAF_3kV_AQ3evKADzanyfo67u3y9Oz6vzz-_np7LyyksixUopa3XgL1PtWcKuB8trRztWN4x54y63QTcsbRaloaiqdF4I1oGopleeMn6DnO93rFH9MxYhZh-yg7-0AccqGESYk1_V_QSpUI7jSBXz6F3gVpzSUJUxJlwpK1PbbFzvIpZhzgs5cp7C2aWMoMdvOzG1nhX2yF5zaNfgDuS-pAM_2gM0l0y6VRkL-g9OK6VoWrtpxoeT96_bdpu-m-NbSLL8sDP94sbyomTIfDrrW5cMS_xr8DdawuH0</recordid><startdate>20040515</startdate><enddate>20040515</enddate><creator>Gu, Xiangyang</creator><creator>Wong, Jonathan W. C</creator><general>American Chemical Society</general><scope>BSCLL</scope><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QO</scope><scope>7ST</scope><scope>7T7</scope><scope>7U7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope><scope>SOI</scope><scope>7QH</scope><scope>7QL</scope><scope>7UA</scope></search><sort><creationdate>20040515</creationdate><title>Identification of Inhibitory Substances Affecting Bioleaching of Heavy Metals from Anaerobically Digested Sewage Sludge</title><author>Gu, Xiangyang ; Wong, Jonathan W. C</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a505t-661a79dae1ddb43a7e138c1fc89c3de3b3a479b3961149815cd4429e68556d323</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Acetic Acid</topic><topic>Acidithiobacillus - metabolism</topic><topic>Acidithiobacillus ferrooxidans</topic><topic>Acids</topic><topic>Applied sciences</topic><topic>Bacteria, Anaerobic - metabolism</topic><topic>Biological and medical sciences</topic><topic>Biological treatment of gaseous effluents</topic><topic>Biotechnology</topic><topic>Chromium - analysis</topic><topic>Copper - analysis</topic><topic>Environment and pollution</topic><topic>Environmental science</topic><topic>Exact sciences and technology</topic><topic>Ferrous Compounds - chemistry</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Heavy metals</topic><topic>Hong Kong</topic><topic>Identification</topic><topic>Industrial applications and implications. Economical aspects</topic><topic>Iron - analysis</topic><topic>Iron - chemistry</topic><topic>Metals</topic><topic>Other industrial wastes. Sewage sludge</topic><topic>Oxidation</topic><topic>Oxidation-Reduction</topic><topic>Pollution</topic><topic>Sewage - analysis</topic><topic>Sewage - chemistry</topic><topic>Sewage - microbiology</topic><topic>Sewage disposal</topic><topic>Sludge</topic><topic>Solubility</topic><topic>Wastes</topic><topic>Zinc - analysis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gu, Xiangyang</creatorcontrib><creatorcontrib>Wong, Jonathan W. C</creatorcontrib><collection>Istex</collection><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>Biotechnology Research Abstracts</collection><collection>Environment Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Toxicology Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environment Abstracts</collection><collection>Aqualine</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Water Resources Abstracts</collection><jtitle>Environmental science & technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gu, Xiangyang</au><au>Wong, Jonathan W. C</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Identification of Inhibitory Substances Affecting Bioleaching of Heavy Metals from Anaerobically Digested Sewage Sludge</atitle><jtitle>Environmental science & technology</jtitle><addtitle>Environ. Sci. Technol</addtitle><date>2004-05-15</date><risdate>2004</risdate><volume>38</volume><issue>10</issue><spage>2934</spage><epage>2939</epage><pages>2934-2939</pages><issn>0013-936X</issn><eissn>1520-5851</eissn><coden>ESTHAG</coden><abstract>Significant inhibitory effects of the filtrate medium of anaerobically digested sewage sludge on iron oxidation by Acidithiobacillus ferrooxidans ANYL-1 were observed in our preliminary experiments, indicating the presence of inhibitory substances in anaerobically digested sewage sludge. The objectives of the present study were to identify the possible inhibitory substances and to evaluate their impacts on metal solubilization during bioleaching of sewage sludge. The results showed that the concentrations of total reducing sugars, all tested metal ions, and anions were too low to suppress iron oxidation, and only organic acids, especially acetic and propionic acids, were found at concentrations higher than their inhibitory levels. The presence of 10.8 mM acetic acid and 9.88 mM propionic acid in sewage sludge (sludge N) led to long lag periods of 6 and 7 days for solubilization of Cu and Cr, respectively, as compared to a lag period of only 1 day in the control and another sludge (sludge S) with a low level of organic acids. Meanwhile the leaching time for maximum solubilization of Zn also extended to 6 days in the presence of organic acids as compared to 3 days in the control. Acetic and propionic acids posed an unfavorable bioleaching condition for anaerobically digested sewage sludge; therefore, further studies are required to explore the means to remove the inhibitory effects to improve the heavy metal bioleaching efficiency.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><pmid>15212270</pmid><doi>10.1021/es0347134</doi><tpages>6</tpages></addata></record> |
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| ispartof | Environmental science & technology, 2004-05, Vol.38 (10), p.2934-2939 |
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| source | MEDLINE; American Chemical Society Publications |
| subjects | Acetic Acid Acidithiobacillus - metabolism Acidithiobacillus ferrooxidans Acids Applied sciences Bacteria, Anaerobic - metabolism Biological and medical sciences Biological treatment of gaseous effluents Biotechnology Chromium - analysis Copper - analysis Environment and pollution Environmental science Exact sciences and technology Ferrous Compounds - chemistry Fundamental and applied biological sciences. Psychology Heavy metals Hong Kong Identification Industrial applications and implications. Economical aspects Iron - analysis Iron - chemistry Metals Other industrial wastes. Sewage sludge Oxidation Oxidation-Reduction Pollution Sewage - analysis Sewage - chemistry Sewage - microbiology Sewage disposal Sludge Solubility Wastes Zinc - analysis |
| title | Identification of Inhibitory Substances Affecting Bioleaching of Heavy Metals from Anaerobically Digested Sewage Sludge |
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