Influence of humic substances on the landfill leachate biodegradability with a focus on temporal seasonality
The high resilience to biological treatments from the landfill leachate is generally associated with the presence of humic substances (HS). The brown color characteristic of this effluent is also related to these substances. Landfill leachate with low biodegradability can make biological treatments...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2021-12-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/84/12/3780 |
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| author | Wagner Guadagnin Moravia Victor Rezende Moreira Yuri Abner Rocha Lebron Liséte Celina Lange Míriam Cristina Santos Amaral |
| author_facet | Wagner Guadagnin Moravia Victor Rezende Moreira Yuri Abner Rocha Lebron Liséte Celina Lange Míriam Cristina Santos Amaral |
| author_sort | Wagner Guadagnin Moravia |
| collection | DOAJ |
| description | The high resilience to biological treatments from the landfill leachate is generally associated with the presence of humic substances (HS). The brown color characteristic of this effluent is also related to these substances. Landfill leachate with low biodegradability can make biological treatments unfeasible, which can drive up the cost for the treatment of large leachate volumes. In this context, this research aimed to characterize the leachate in different seasonal periods, and verify the influence of HS species on the biodegradability of the effluent to assist in the selection of adequate treatment techniques. The HS quantification was performed using the modified Lowry method and speciation through fractionation according to the molar masses of the HS species. The tropical regions can be the precursor for the rapid stabilization of biodegradable organic matter. The warmer climate contributed to a reduced BOD/COD ratio (0.03) and the predominance of compounds of lower mass (e.g.: fulvic acids). The tests showed an HS concentration of 26.9% of the total COD in the raw leachate in the rainy season, which increased to 37.3% in the dry season. Approximately 70% of HS species refer to fulvic acids, a fraction identified as having the highest biologic treatment resilience. HIGHLIGHTS
A method for HS determination in the presence of proteins was assessed.;
Leachate is diluted during hydric surplus.;
FA are the main compounds in stabilized leachate among the HS.;
Leachate resilience to biodegradation is mainly derived from FA.;
Hydraulic retention times longer than 20 days are not recommended due to cell lysis.; |
| first_indexed | 2024-12-20T14:46:39Z |
| format | Article |
| id | doaj.art-6667e3010c424715a953feb3e56c287f |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-12-20T14:46:39Z |
| publishDate | 2021-12-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-6667e3010c424715a953feb3e56c287f2022-12-21T19:37:05ZengIWA PublishingWater Science and Technology0273-12231996-97322021-12-0184123780379010.2166/wst.2021.499499Influence of humic substances on the landfill leachate biodegradability with a focus on temporal seasonalityWagner Guadagnin Moravia0Victor Rezende Moreira1Yuri Abner Rocha Lebron2Liséte Celina Lange3Míriam Cristina Santos Amaral4 Department of Environmental Science and Technology, Federal Center of Technological Education of Minas Gerais, Amazonas, Av. 5.253 – Nova Suíça, 30.421-169, Belo Horizonte, MG, Brazil Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, P.O. Box 1294, 31.270-901, Belo Horizonte, MG, Brazil Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, P.O. Box 1294, 31.270-901, Belo Horizonte, MG, Brazil Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, P.O. Box 1294, 31.270-901, Belo Horizonte, MG, Brazil Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, P.O. Box 1294, 31.270-901, Belo Horizonte, MG, Brazil The high resilience to biological treatments from the landfill leachate is generally associated with the presence of humic substances (HS). The brown color characteristic of this effluent is also related to these substances. Landfill leachate with low biodegradability can make biological treatments unfeasible, which can drive up the cost for the treatment of large leachate volumes. In this context, this research aimed to characterize the leachate in different seasonal periods, and verify the influence of HS species on the biodegradability of the effluent to assist in the selection of adequate treatment techniques. The HS quantification was performed using the modified Lowry method and speciation through fractionation according to the molar masses of the HS species. The tropical regions can be the precursor for the rapid stabilization of biodegradable organic matter. The warmer climate contributed to a reduced BOD/COD ratio (0.03) and the predominance of compounds of lower mass (e.g.: fulvic acids). The tests showed an HS concentration of 26.9% of the total COD in the raw leachate in the rainy season, which increased to 37.3% in the dry season. Approximately 70% of HS species refer to fulvic acids, a fraction identified as having the highest biologic treatment resilience. HIGHLIGHTS A method for HS determination in the presence of proteins was assessed.; Leachate is diluted during hydric surplus.; FA are the main compounds in stabilized leachate among the HS.; Leachate resilience to biodegradation is mainly derived from FA.; Hydraulic retention times longer than 20 days are not recommended due to cell lysis.;http://wst.iwaponline.com/content/84/12/3780biodegradabilityhumic substancesinert codlandfill leachatemolar mass distribution |
| spellingShingle | Wagner Guadagnin Moravia Victor Rezende Moreira Yuri Abner Rocha Lebron Liséte Celina Lange Míriam Cristina Santos Amaral Influence of humic substances on the landfill leachate biodegradability with a focus on temporal seasonality Water Science and Technology biodegradability humic substances inert cod landfill leachate molar mass distribution |
| title | Influence of humic substances on the landfill leachate biodegradability with a focus on temporal seasonality |
| title_full | Influence of humic substances on the landfill leachate biodegradability with a focus on temporal seasonality |
| title_fullStr | Influence of humic substances on the landfill leachate biodegradability with a focus on temporal seasonality |
| title_full_unstemmed | Influence of humic substances on the landfill leachate biodegradability with a focus on temporal seasonality |
| title_short | Influence of humic substances on the landfill leachate biodegradability with a focus on temporal seasonality |
| title_sort | influence of humic substances on the landfill leachate biodegradability with a focus on temporal seasonality |
| topic | biodegradability humic substances inert cod landfill leachate molar mass distribution |
| url | http://wst.iwaponline.com/content/84/12/3780 |
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