Fractionation, molecular composition, and biological effects of organic matter in bio-stabilization sludge with implication to land utilization
Bioactive organic compounds (BOCs) contained in bio-stabilized products of waste activated sludge (WAS) have attracted considerable attention, as they can enhance the fertilizing effect of WAS in land applications. This study investigated the molecular composition and plant-growth-promoting mechanis...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Environment International |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0160412022005281 |
| _version_ | 1811206861403193344 |
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| author | Yu Zhang Hao Yuan Siying Cai Hang He Peng Yang Aibin Hu Weijun Zhang Dongsheng Wang |
| author_facet | Yu Zhang Hao Yuan Siying Cai Hang He Peng Yang Aibin Hu Weijun Zhang Dongsheng Wang |
| author_sort | Yu Zhang |
| collection | DOAJ |
| description | Bioactive organic compounds (BOCs) contained in bio-stabilized products of waste activated sludge (WAS) have attracted considerable attention, as they can enhance the fertilizing effect of WAS in land applications. This study investigated the molecular composition and plant-growth-promoting mechanisms of various BOCs in the bio-stabilized products of WAS. After stepwise fractionation, aerobic composting sludge (ACS) and anaerobic digestion sludge (ADS) were chemically fractioned into five subcomponents, namely dissolved organic matter (DOM) (C1), weakly interacted organic matter (OM) (C2), metal-bonded OM (C3), NaOH-extracted OM (C4), and strongly interacted OM (C5), in sequence. The results showed that fatty acids and carboxylic acid (CAs) present in ACS C2 promoted plant growth and enhanced the ability of plants against stresses by upregulating pathways related to “carbohydrate metabolism,” “lipid metabolism,” “amino acid metabolism,” and “phenylpropanoid biosynthesis.” However, in ACS C4, plenty of amino acids could promote plant growth via upregulating “carbohydrate metabolism” and “amino acid metabolism” pathways. As an important precursor, aromatic amino acids inside ACS C4 also stimulated the production of indoleacetic acids. In ADS C1, amino sugar and phytohormone were the major BOCs causing the up-regulation of “carbohydrate metabolism” and AAA catabolism in “amino acid metabolism” pathways. CAs enriched in ADS C2 stimulated plant growth through “amino acid metabolism” pathway. In summary, alkali extraction can recycle a large proportion of BOCs with low environmental risk from the bio-stabilization products of WAS. The results from this study provide scientific guidance for safe and value-added resource utilization of bio-stabilization products of WAS in land applications. |
| first_indexed | 2024-04-12T03:53:57Z |
| format | Article |
| id | doaj.art-7ad847868bc04d2f97d36dbf42b4f1e0 |
| institution | Directory Open Access Journal |
| issn | 0160-4120 |
| language | English |
| last_indexed | 2024-04-12T03:53:57Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environment International |
| spelling | doaj.art-7ad847868bc04d2f97d36dbf42b4f1e02022-12-22T03:48:53ZengElsevierEnvironment International0160-41202022-12-01170107601Fractionation, molecular composition, and biological effects of organic matter in bio-stabilization sludge with implication to land utilizationYu Zhang0Hao Yuan1Siying Cai2Hang He3Peng Yang4Aibin Hu5Weijun Zhang6Dongsheng Wang7School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, ChinaSchool of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, ChinaSchool of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, ChinaSchool of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, ChinaSchool of Civil Engineering and Architecture, Northeast Electric Power University, Jilin 132012, Jilin, ChinaSchool of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, ChinaSchool of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China; Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China; State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution, Ministry of Ecology and Environment, Wuhan 430074, Hubei, China; Corresponding author at: School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China.Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, Zhejiang, ChinaBioactive organic compounds (BOCs) contained in bio-stabilized products of waste activated sludge (WAS) have attracted considerable attention, as they can enhance the fertilizing effect of WAS in land applications. This study investigated the molecular composition and plant-growth-promoting mechanisms of various BOCs in the bio-stabilized products of WAS. After stepwise fractionation, aerobic composting sludge (ACS) and anaerobic digestion sludge (ADS) were chemically fractioned into five subcomponents, namely dissolved organic matter (DOM) (C1), weakly interacted organic matter (OM) (C2), metal-bonded OM (C3), NaOH-extracted OM (C4), and strongly interacted OM (C5), in sequence. The results showed that fatty acids and carboxylic acid (CAs) present in ACS C2 promoted plant growth and enhanced the ability of plants against stresses by upregulating pathways related to “carbohydrate metabolism,” “lipid metabolism,” “amino acid metabolism,” and “phenylpropanoid biosynthesis.” However, in ACS C4, plenty of amino acids could promote plant growth via upregulating “carbohydrate metabolism” and “amino acid metabolism” pathways. As an important precursor, aromatic amino acids inside ACS C4 also stimulated the production of indoleacetic acids. In ADS C1, amino sugar and phytohormone were the major BOCs causing the up-regulation of “carbohydrate metabolism” and AAA catabolism in “amino acid metabolism” pathways. CAs enriched in ADS C2 stimulated plant growth through “amino acid metabolism” pathway. In summary, alkali extraction can recycle a large proportion of BOCs with low environmental risk from the bio-stabilization products of WAS. The results from this study provide scientific guidance for safe and value-added resource utilization of bio-stabilization products of WAS in land applications.http://www.sciencedirect.com/science/article/pii/S0160412022005281Bioactive organic compoundBio-stabilization technologyResource recoverySewage sludgeStepwise extraction |
| spellingShingle | Yu Zhang Hao Yuan Siying Cai Hang He Peng Yang Aibin Hu Weijun Zhang Dongsheng Wang Fractionation, molecular composition, and biological effects of organic matter in bio-stabilization sludge with implication to land utilization Environment International Bioactive organic compound Bio-stabilization technology Resource recovery Sewage sludge Stepwise extraction |
| title | Fractionation, molecular composition, and biological effects of organic matter in bio-stabilization sludge with implication to land utilization |
| title_full | Fractionation, molecular composition, and biological effects of organic matter in bio-stabilization sludge with implication to land utilization |
| title_fullStr | Fractionation, molecular composition, and biological effects of organic matter in bio-stabilization sludge with implication to land utilization |
| title_full_unstemmed | Fractionation, molecular composition, and biological effects of organic matter in bio-stabilization sludge with implication to land utilization |
| title_short | Fractionation, molecular composition, and biological effects of organic matter in bio-stabilization sludge with implication to land utilization |
| title_sort | fractionation molecular composition and biological effects of organic matter in bio stabilization sludge with implication to land utilization |
| topic | Bioactive organic compound Bio-stabilization technology Resource recovery Sewage sludge Stepwise extraction |
| url | http://www.sciencedirect.com/science/article/pii/S0160412022005281 |
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