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Xia H, Zhu L, Ding J, Chen J, Huang K, Zhao M, Li F, Jiang Y. Earthworm gut digestion drives the transfer behavior of antibiotic resistance genes in layers of extracellular polymeric substances during vermicomposting of dewatered sludge. ENVIRONMENTAL RESEARCH 2024; 259:119489. [PMID: 38925469 DOI: 10.1016/j.envres.2024.119489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Revised: 06/17/2024] [Accepted: 06/22/2024] [Indexed: 06/28/2024]
Abstract
Gut digestion by earthworms (GDE) is a crucial step in vermicomposting, affecting the fate of antibiotic resistance genes (ARGs) in vermicompost sludge. The extracellular polymeric substance (EPS) matrix of sludge is an important space for ARG transfer. However, the effect of GDE on EPS-associated ARGs remains unclear. Therefore, this study explored the role of GDE in driving the transfer of ARGs within different EPS layers in sludge. For this, the changes in intracellular ARGs and EPS-associated ARGs in sludge were analyzed after 5 days of the GDE process. The results showed that after the GDE process, both nitrate and dissolved organic carbon significantly increased in all EPS layers of sludge, while the proteins and polysaccharides only enhanced in soluble and loosely bound EPS of sludge. In addition, a 7.0% decrease in bacterial diversity was recorded after the GDE process, with a functional bacterial community structure emerging. Moreover, the absolute abundance of total ARGs and mobile genetic elements decreased by 90.71% and 61.83%, respectively, after the GDE process. Intracellular ARGs decreased by 92.1%, while EPS-associated ARGs increased by 4.9%, indicative of intracellular ARG translocation into the EPS during the GDE process. Notably, the ARGs exhibited significant enrichment in both the soluble and loosely bound EPS, whereas they were reduced in the tightly bound EPS. The structural equation modeling revealed that the GDE process effectively mitigated the ARG dissemination risk by modulating both the EPS structure and microenvironment, with the organic structure representing a primary factor influencing ARGs in the EPS.
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Affiliation(s)
- Hui Xia
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Licheng Zhu
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Jungang Ding
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Jin Chen
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Kui Huang
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan.
| | - Meng Zhao
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Fusheng Li
- River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Yufeng Jiang
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
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2
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Li X, Chen T, Ren Q, Lu J, Cao S, Liu C, Li Y. Phages in sludge from the A/O wastewater treatment process play an important role in the transmission of ARGs. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:172111. [PMID: 38565354 DOI: 10.1016/j.scitotenv.2024.172111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/24/2024] [Accepted: 03/28/2024] [Indexed: 04/04/2024]
Abstract
Phages can influence the horizontal gene transfer (HGT) of antibiotic resistance genes (ARGs) through transduction, but their profiles and effects on the transmission of ARGs are unclear, especially in complex swine sludge. In this study, we investigated the characterization of phage and ARG profiles in sludge generated from anoxic/oxic (A/O) wastewater treatment processes on swine farms using metagenomes and viromes. The results demonstrated that 205-221 subtypes of ARGs could be identified in swine sludge, among which sul1, tet(M), and floR were the dominant ARGs, indicating that sludge is an important reservoir of ARGs, especially in sludge (S) tanks. The greater abundance of mobile genetic elements (MGEs) in the S tank could significantly contribute to the greater abundance of ARGs there compared to the anoxic (A) and oxic (O) tanks (P < 0.05). However, when we compared the abundances of ARGs and MGEs in the A and O tanks, we observed opposite significant differences (P < 0.05), suggesting that MGEs are not the only factor influencing the abundance of ARGs. The high proportion of lysogenic phages in sludge from the S tank can also have a major impact on the ARG profile. Siphoviridae, Myoviridae, and Podoviridae were the dominant phage families in sludge, and a network diagram of bacteria-ARG-phages revealed that dominant phages and bacteria acted simultaneously as potential hosts for ARGs, which may have led to phage-mediated HGT of ARGs. Therefore, the risk of phage-mediated HGT of ARGs cannot be overlooked.
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Affiliation(s)
- Xiaoting Li
- Phage Research Center, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Tao Chen
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
| | - Qinghai Ren
- Phage Research Center, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Jianbiao Lu
- Phage Research Center, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Shengliang Cao
- Phage Research Center, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Cheng Liu
- Phage Research Center, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Yubao Li
- Phage Research Center, Liaocheng University, Liaocheng, Shandong 252000, China.
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Liu H, Zhang Z, Li X, Zhou T, Wang Z, Li J, Li Y, Wang Q. Temperature-phased anaerobic sludge digestion effectively removes antibiotic resistance genes in a full-scale wastewater treatment plant. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 924:171555. [PMID: 38485028 DOI: 10.1016/j.scitotenv.2024.171555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/04/2024] [Accepted: 03/04/2024] [Indexed: 03/17/2024]
Abstract
Sludge is a major by-product and the final reservoir of antibiotic resistance genes (ARGs) in wastewater treatment plants (WWTPs). Temperature-phased anaerobic digestion (TPAD), consisting of thermophilic anaerobic digestion (AD) (55 °C) and mesophilic AD processes (37 °C), has been implemented in WWTPs for sludge reduction while improving the biomethane production. However, the impact of TPAD on the ARGs' fate is still undiscovered in lab-scale experiments and full-scale WWTPs. This study, for the first time, investigated the fate of ARGs during the TPAD process across three seasons in a full-size WWTP. Ten typical ARGs and one integrase gene of class 1 integron (intI1) involving ARGs horizontal gene transfer were examined in sludge before and after each step of the TPAD process. TPAD reduced aac(6')-Ib-cr, blaTEM, drfA1, sul1, sul2, ermb, mefA, tetA, tetB and tetX by 87.3-100.0 %. TPAD reduced the overall average absolute abundance of targeted ARGs and intI1 by 92.39 % and 92.50 %, respectively. The abundance of targeted ARGs in sludge was higher in winter than in summer and autumn before and after TPAD. During the TPAD processes, thermophilic AD played a major role in the removal of ARGs, contributing to >60 % removal of ARGs, while the subsequent mesophilic AD contributed to a further 31 % removal of ARGs. The microbial community analysis revealed that thermophilic AD reduced the absolute abundance of ARGs hosts, antibiotic resistant bacteria. In addition, thermophilic AD reduced the abundance of the intI1, while the intI1 did not reproduce during the mesophilic AD, also contributing to a decline in the absolute abundance of ARGs in TPAD. This study demonstrates that TPAD can effectively reduce the abundance of ARGs in sludge, which will suppress the transmission of ARGs from sludge into the natural environment and deliver environmental and health benefits to our society.
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Affiliation(s)
- Huan Liu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia
| | - Zehao Zhang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia
| | - Xuan Li
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia
| | - Ting Zhou
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia
| | - Zhenyao Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia
| | - Jibin Li
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia
| | - Yi Li
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia
| | - Qilin Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia.
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P Rayaroth M, Aubry O, Rabat H, Marilleau E, Gru Y, Hong D, Brault P. Degradation and transformation of carbamazepine in aqueous medium under non-thermal plasma oxidation process. CHEMOSPHERE 2024; 352:141449. [PMID: 38354864 DOI: 10.1016/j.chemosphere.2024.141449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 09/22/2023] [Accepted: 02/10/2024] [Indexed: 02/16/2024]
Abstract
Carbamazepine (CBZ) is a pharmaceutical compound detected in various water resources. With a view to removing this contaminant, the applicability of non-thermal plasma (NTP) oxidation process has been widely tested in recent years. This study utilized NTP from a dielectric barrier discharge reactor in the treatment of CBZ. NTP on the surface of a water sample containing 25 mg.L-1 of CBZ resulted in a removal efficiency of over 90% with an energy yield of 0.19 g. (kWh)-1. On the other hand, a rapid reduction in pH and an increase of conductivity and nitrate/nitrite ions concentration were observed during the degradation. The applied voltage amplitude significantly affected the removal efficiency and the energy yield as the degradation efficiency was 55%, 70%, and 72% respectively with an applied voltage of 8, 10, and 12 kV. The water matrices containing inorganic anions such as chloride and carbonate ions reduced the removal efficiency by scavenging the reactive species. Accordingly, a reduction in the removal efficiency was observed in tap water. The high-resolution mass spectrometry (HRMS) results revealed that both reactive oxygen and nitrogen species take part in the reaction process which yields many intermediate products including aromatic nitro-products. This study concluded that NTP can effectively degrade CBZ in both pure and tap water, but special attention must be paid to changes in the water quality parameters (pH, conductivity, and nitrate/nitrite ions) and the fate of nitro products.
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Affiliation(s)
- Manoj P Rayaroth
- GREMI, UMR 7344, CNRS, Université d'Orléans, 45067 Orléans, France; Department of Environmental Science, School of Science, GITAM (Deemed to be) University, Visakhapatnam, 530045, India.
| | - Olivier Aubry
- GREMI, UMR 7344, CNRS, Université d'Orléans, 45067 Orléans, France.
| | - Hervé Rabat
- GREMI, UMR 7344, CNRS, Université d'Orléans, 45067 Orléans, France
| | - Eloi Marilleau
- INOVALYS Vannes, 5 rue Denis Papin CS 20080, 56892 Saint-Avé, France
| | - Yvan Gru
- INOVALYS Nantes, Route de Gachet BP52703, 44327 Nantes Cedex 3, France; INOVALYS Tours, 3 rue de l'Aviation BP67357, 37073 Tours Cedex, France
| | - Dunpin Hong
- GREMI, UMR 7344, CNRS, Université d'Orléans, 45067 Orléans, France
| | - Pascal Brault
- GREMI, UMR 7344, CNRS, Université d'Orléans, 45067 Orléans, France
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Unnikrishan A, Khalid NK, Rayaroth MP, Thomas S, Nazim A, Aravindakumar CT, Aravind UK. Occurrence and distribution of steroid hormones (estrogen) and other contaminants of emerging concern in a south indian water body. CHEMOSPHERE 2024; 351:141124. [PMID: 38211796 DOI: 10.1016/j.chemosphere.2024.141124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 12/06/2023] [Accepted: 01/03/2024] [Indexed: 01/13/2024]
Abstract
Steroid hormones (SHs) are among the important classes of Contaminants of Emerging Concern (CECs) whose detection in aquatic environments is vital due to their potential adverse health impacts. Their detection is challenging because of their lower stability in natural conditions and low concentrations. This study reports the presence of steroid hormones in a major river system, the Periyar River, in Kerala (India). Water samples were collected from thirty different river locations in the case of SHs and five locations within these in the case of other CECs. These were subjected to LC-MS/MS and LC-Q-ToF/MS analyses. Five SHs, estriol, estrone, 17 β estradiol, progesterone, and hydroxy progesterone, were separated and targeted using MS techniques. The studies of the water samples confirmed the presence of the first three estrogens in different sampling sites, with estrone present in all the sampling sites. The concentration of estrone was detected in the range from 2 to 15 ng/L. Estriol and estradiol concentrations ranged from 1.0 to 5 ng/L and 1-6 ng/L, respectively. The hormones at some selected sites were continuously monitored for seven months. The chosen areas include the feed water sites for the drinking water treatment plants across the river. The monthly data revealed that estrone is the only SHs detected in all the samples in the selected months. The highest concentration of SH was found in August. Twelve CECs belonging to pharmaceuticals and personal care products were identified and quantified. In addition, 31 other CECs were also identified using non-target analysis. A detailed study of the hormone mapping reported here is the first from any South Indian River.
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Affiliation(s)
- Amitha Unnikrishan
- School of Environmental Studies, Cochin University of Science & Technology (CUSAT), Kochi, 682022, Kerala, India
| | - Nejumal K Khalid
- School of Environmental Sciences, Mahatma Gandhi University (MGU), Kottayam, 686560, Kerala, India
| | - Manoj P Rayaroth
- School of Environmental Sciences, Mahatma Gandhi University (MGU), Kottayam, 686560, Kerala, India
| | - Shiny Thomas
- Sophisticated Analytical Instrument Facilities (SAIFs), Mahatma Gandhi University (MGU), Kottayam, 686560, Kerala, India
| | - Akhil Nazim
- Inter University Instrumentation Centre (IUIC), Mahatma Gandhi University (MGU), Kottayam, 686560, Kerala, India
| | - Charuvila T Aravindakumar
- School of Environmental Sciences, Mahatma Gandhi University (MGU), Kottayam, 686560, Kerala, India; Inter University Instrumentation Centre (IUIC), Mahatma Gandhi University (MGU), Kottayam, 686560, Kerala, India; Sophisticated Analytical Instrument Facilities (SAIFs), Mahatma Gandhi University (MGU), Kottayam, 686560, Kerala, India
| | - Usha K Aravind
- School of Environmental Studies, Cochin University of Science & Technology (CUSAT), Kochi, 682022, Kerala, India.
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6
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Xu W, Pan Z, Wu Y, An XL, Wang W, Adamovich B, Zhu YG, Su JQ, Huang Q. A database on the abundance of environmental antibiotic resistance genes. Sci Data 2024; 11:250. [PMID: 38413616 PMCID: PMC10899624 DOI: 10.1038/s41597-024-03084-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 02/20/2024] [Indexed: 02/29/2024] Open
Abstract
Antimicrobial resistance (AMR) poses a severe threat to global health. The wide distribution of environmental antibiotic resistance genes (ARGs), which can be transferred between microbiota, especially clinical pathogens and human commensals, contributed significantly to AMR. However, few databases on the spatiotemporal distribution, abundance, and health risk of ARGs from multiple environments have been developed, especially on the absolute level. In this study, we compiled the ARG occurrence data generated by a high-throughput quantitative PCR platform from 1,403 samples in 653 sampling sites across 18 provinces in China. The database possessed 291,870 records from five types of habitats on the abundance of 290 ARGs, as well as 8,057 records on the abundance of 30 mobile genetic elements (MGEs) from 2013 to 2020. These ARGs conferred resistance to major common types of antibiotics (a total of 15 types) and represented five major resistance mechanisms, as well as four risk ranks. The database can provide information for studies on the dynamics of ARGs and is useful for the health risk assessment of AMR.
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Affiliation(s)
- Wenjuan Xu
- Xiamen Key Laboratory of Indoor Air and Health, Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhizhen Pan
- Xiamen Key Laboratory of Indoor Air and Health, Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Yangyu Wu
- Xiamen Key Laboratory of Indoor Air and Health, Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Xin-Li An
- Xiamen Key Laboratory of Indoor Air and Health, Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Weiyi Wang
- College of Life Sciences, Institute of Life Sciences and Green Development, Hebei University, Baoding, 071002, China
| | - Boris Adamovich
- Research Laboratory of Aquatic Ecology, Belarusian State University, Minsk, 220030, Belarus
| | - Yong-Guan Zhu
- Xiamen Key Laboratory of Indoor Air and Health, Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Jian-Qiang Su
- Xiamen Key Laboratory of Indoor Air and Health, Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
| | - Qiansheng Huang
- Xiamen Key Laboratory of Indoor Air and Health, Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
- National Basic Science Data Center, Beijing, 100190, China.
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7
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Qin S, Zhang D, Wang J, Liang M, Chen W, Zhang T, Lu X, Li L, Wu X, Zan F. In-situ sulfite treatment promotes solid reduction during aerobic digestion of waste activated sludge: Feasibility for small-scale wastewater treatment plants. BIORESOURCE TECHNOLOGY 2024; 394:130224. [PMID: 38122993 DOI: 10.1016/j.biortech.2023.130224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/05/2023] [Accepted: 12/16/2023] [Indexed: 12/23/2023]
Abstract
Aerobic digestion remains the preferred choice for small-scale wastewater treatment plants (WWTPs) in some developing countries, largely due to economic viability and operational simplicity. The escalating production of waste activated sludge (WAS) has prompted small-scale WWTPs to improve efficiency. To address this issue, this study employed an in-situ sulfite treatment as a non-intrusive method to augment aerobic digestion. With sulfite-enhanced solubilization and hydrolysis, a 3.6-fold increase in degradation was achieved. Both sludge dewatering properties and pathogens inactivation were improved. Microbial community analysis revealed a preferential enrichment of Actinobacteriota and Firmicutes during sulfite treatment. The desktop scaling-up estimation suggests that implementing this treatment yielded operational cost savings exceeding 40 %. In summary, in-situ sulfite treatment offers a cost-effective strategy for WAS management in small-scale WWTPs.
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Affiliation(s)
- Shichan Qin
- School of Environmental Science and Engineering, Low-Carbon Water Environment Technology Center (HUST-SUKE), and Key Laboratory of Water and Wastewater Treatment, MOHURD, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Dandan Zhang
- School of Environmental Science and Engineering, Low-Carbon Water Environment Technology Center (HUST-SUKE), and Key Laboratory of Water and Wastewater Treatment, MOHURD, Huazhong University of Science and Technology, Wuhan 430074, China; School of Urban Construction, Department of Water and Wastewater Engineering and Hubei Experimental Teaching Demonstration Center, Wuhan University of Science and Technology, Wuhan 430065, China
| | - Jiale Wang
- School of Environmental Science and Engineering, Low-Carbon Water Environment Technology Center (HUST-SUKE), and Key Laboratory of Water and Wastewater Treatment, MOHURD, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Muxiang Liang
- School of Environmental Science and Engineering, Low-Carbon Water Environment Technology Center (HUST-SUKE), and Key Laboratory of Water and Wastewater Treatment, MOHURD, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Wei Chen
- School of Urban Construction, Department of Water and Wastewater Engineering and Hubei Experimental Teaching Demonstration Center, Wuhan University of Science and Technology, Wuhan 430065, China
| | - Tiantian Zhang
- Changjiang Eco-environmental Protection Group Co., Ltd, Wuhan, China
| | - Xiejuan Lu
- School of Environmental Science and Engineering, Low-Carbon Water Environment Technology Center (HUST-SUKE), and Key Laboratory of Water and Wastewater Treatment, MOHURD, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Liangbin Li
- Changjiang Eco-environmental Protection Group Co., Ltd, Wuhan, China
| | - Xiaohui Wu
- School of Environmental Science and Engineering, Low-Carbon Water Environment Technology Center (HUST-SUKE), and Key Laboratory of Water and Wastewater Treatment, MOHURD, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Feixiang Zan
- School of Environmental Science and Engineering, Low-Carbon Water Environment Technology Center (HUST-SUKE), and Key Laboratory of Water and Wastewater Treatment, MOHURD, Huazhong University of Science and Technology, Wuhan 430074, China.
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Liu W, Sun C, Ren Z, Hao S, Chen Z, Li T, Wen X. Long-term occurrence, resistance risk and chaotic characteristics of antibiotic resistance genes in sludge anaerobic digestion system. BIORESOURCE TECHNOLOGY 2024; 394:130267. [PMID: 38154733 DOI: 10.1016/j.biortech.2023.130267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/08/2023] [Accepted: 12/25/2023] [Indexed: 12/30/2023]
Abstract
The long-term occurrence, dynamics and risk of antibiotic resistance genes (ARGs) in anaerobic digestion (AD) of excess sludge (ES) are not fully understood. Therefore, 13-month metagenomic monitoring was carried out in a full-scale AD plant. The highest ARG abundance and risk scores were observed in spring. AD achieved a 35 % removal rate for the total ARG abundance, but the risk score of AD sludge was not always lower than ES samples, because of the higher proportion of Rank I ARGs in AD sludge. ARGs showed less obvious patterns under linear models compared with microbial community, implying their chaotic dynamics, which was further confirmed by nonlinearity tests. Empirical dynamic modeling performed better than the autoregressive integrated moving average model for ARG dynamics, especially for those with simple and nonlinear dynamics. This study highlighted spring for its higher ARG abundance and risk, and recommended nonlinear models for revealing the dynamics of ARGs.
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Affiliation(s)
- Wei Liu
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Chenxiang Sun
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Zhengran Ren
- Research and Development Center, Beijing Drainage Group Co. Ltd., Beijing 100080, China
| | - Shan Hao
- Research and Development Center, Beijing Drainage Group Co. Ltd., Beijing 100080, China
| | - Zhan Chen
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Tianle Li
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Xianghua Wen
- School of Environment, Tsinghua University, Beijing 100084, China.
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9
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Yin S, Gao L, Fan X, Gao S, Zhou X, Jin W, He Z, Wang Q. Performance of sewage sludge treatment for the removal of antibiotic resistance genes: Status and prospects. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 907:167862. [PMID: 37865259 DOI: 10.1016/j.scitotenv.2023.167862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 10/12/2023] [Accepted: 10/13/2023] [Indexed: 10/23/2023]
Abstract
Wastewater treatment plants (WWTPs) receive wastewater containing antibiotic resistant bacteria (ARB) and antibiotic resistant genes (ARGs), which are predominant contributors to environmental pollution in water and soil. Of these sources, sludge is a more significant contributor than effluent. Knowing how sludge treatment affects the fate of ARGs is vital for managing the risk of these genes in both human and natural environments. This review therefore discusses the sources and transmission of ARGs in the environment and highlights the risks of ARGs in sludge. The effects of co-existing constituents (heavy metals, microplastics, etc.) on sludge and ARGs during treatment are collated to highlight the difficulty of treating sludge with complex constituents in ARGs. The effects of various sludge treatment methods on the abundances of ARGs in sludge and in soil from land application of treated sludge are discussed, pointing out that the choice of sludge treatment method should take into account various potential factors, such as soil and soil biology in subsequent land application. This review offers significant insights and explores the abundances of ARGs throughout the process of sludge treatment and disposal. Unintentional addition of antibiotic residues, heavy metals, microplastics and organic matter in sludge could significantly increase the abundance and reduce the removal efficiency of ARGs during treatment, which undoubtedly adds a barrier to the removal of ARGs from sludge treatment. The complexity of the sludge composition and the diversities of ARGs have led to the fact that no effective sludge treatment method has so far been able to completely eliminate the ecological risk of ARGs. In order to reduce risks resulting by transmission of ARGs, technical and management measures need to be implemented.
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Affiliation(s)
- Shiyu Yin
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Le Gao
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Xiumin Fan
- Shenzhen Ecological and Environmental Intelligent Management and Control Center, Shenzhen 518034, China
| | - Shuhong Gao
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Xu Zhou
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
| | - Wenbiao Jin
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Zhongqi He
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Qilin Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
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Mortezaei Y, Williams MR, Demirer GN. The fate of antibiotic resistance genes during anaerobic digestion of sewage sludge with ultrasonic pretreatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:5513-5525. [PMID: 38127236 DOI: 10.1007/s11356-023-31558-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 12/11/2023] [Indexed: 12/23/2023]
Abstract
This study investigated the effect of ultrasonic (US) pretreatment at three different contact times (30, 45, and 60 min) with a power of 240 W and frequency of 40 kHz on the fate of antibiotic resistance genes (ARGs), mobile genetic elements (MGEs), and enteric pathogens during anaerobic digestion (AD) of sludge. By using real time-qPCR, three MGEs (int1, int2, and tnpA) and seven ARGs (sul1, sul2, tetW, tetA, tetO, ermF, and aac(6')-lb) were quantified that have serious human health impacts and represent the most widely used antibiotics (tetracycline, sulfonamide, macrolide, and aminoglycoside). Results indicated that US pretreatment under different contact times improved the removal of ARGs and MGEs. Compared to 30 and 45 min of US pretreatment, 60 min of US pretreatment resulted in a higher reduction of ARGs with total ARG reduction of 41.70 ± 1.13%. Furthermore, the relative abundance of ARGs and MGEs after US pretreatment was reduced more effectively in anaerobic reactors than in a control AD without US pretreatment. The total ARGs and MGEs removal efficiency of control AD was 44.07 ± 0.72% and 63.69 ± 1.43%, and if US pretreatment at different times were applied, the total ARGs and MGEs removal efficiency of the whole pretreatment AD process improved to 59.71 ± 2.76-68.54 ± 1.58% and 69.82 ± 2.15-76.84 ± 0.22%. The highest removal of total ARGs (68.54 ± 1.58%) and MGEs (76.84 ± 0.22%) was achieved after AD with US pretreatment at 45 min. However, US pretreatment and AD with US pretreatment were not effective in inactivation of enteric pathogens (total coliforms and E. coli), suggesting that posttreatment is needed prior to land application of sludge to reduce the level of enteric pathogens. There was no detection of the studied ARGs and MGEs in the enteric pathogens after US pretreatment in subsequent AD. According to this study, long contact times of US pretreatment can mitigate ARGs and MGEs in AD processes, offering valuable insight into improving environmental safety and sustainable waste management. Additionally, the study highlights the need to investigate posttreatment techniques for reducing enteric pathogens in AD effluent, a crucial consideration for agricultural use and environmental protection.
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Affiliation(s)
- Yasna Mortezaei
- Earth and Ecosystem Science, Central Michigan University, Mount Pleasant, MI, USA
| | - Maggie R Williams
- School of Engineering and Technology, Central Michigan University, Mount Pleasant, MI, USA
- Institute for Great Lakes Research, Central Michigan University, Mount Pleasant, MI, USA
| | - Goksel N Demirer
- School of Engineering and Technology, Central Michigan University, Mount Pleasant, MI, USA.
- Institute for Great Lakes Research, Central Michigan University, Mount Pleasant, MI, USA.
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11
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Li L, Hu Y, Li B, Kuang K, Peng L, Xu Y, Song K. Effect and microbial mechanism of pharmaceutical and personal care product exposure on partial nitrification process and nitrous oxide emission. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166286. [PMID: 37586526 DOI: 10.1016/j.scitotenv.2023.166286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 08/11/2023] [Accepted: 08/12/2023] [Indexed: 08/18/2023]
Abstract
This study focused on the short- and long-term exposure of pharmaceutical and personal care products (PPCPs) to the partial nitrification process and nitrous oxide emission. The corresponding microbial mechanisms were also explored. The results revealed a concentration-dose effect on the partial nitrification process. Moreover, the PPCP concentration of ≥2 μg/L featured inhibitory effects on the process. The solo effect of PPCP on the partial nitrification process was analyzed through microcosmic experiments, and the results revealed significant variations in PN. A dose-effect relationship existed between the PPCP concentration and N2O emission intensity. After exposure to PPCPs, the N2O emission released during the partial nitrification process was significantly reduced. Different PPCPs featured various effects in mitigating N2O emissions. Low PPCP concentrations led to a reduction in the richness and diversity of microbes, but their community structure remained significantly unchanged. High PPCP concentrations (≥5 μg/L) resulted in increased species richness and diversity, but their microbial community composition was significantly affected. The function prediction and nitrogen metabolic pathway analysis indicated that PPCP exposure led to the inhibition of the ammonia oxidation process. However, all genes encoding denitrification enzymes were upregulated. The microorganisms in the microbial community featured modular structural properties and wide synergistic relationships between genera. This study provides valuable insights into the effect of PPCP exposure on the particle nitrification process and corresponding changes in the microbial community.
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Affiliation(s)
- Lu Li
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China
| | - Yikun Hu
- School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei 430070, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Biqing Li
- Guangzhou Sewage Purification Co. Ltd., Guangzhou 510655, China
| | - Ke Kuang
- Guangzhou Sewage Purification Co. Ltd., Guangzhou 510655, China
| | - Lai Peng
- School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei 430070, China
| | - Yifeng Xu
- School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei 430070, China
| | - Kang Song
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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12
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Wang Z, Li X, Liu H, Zhou T, Li J, Siddiqui MA, Lin CSK, Rafe Hatshan M, Huang S, Cairney JM, Wang Q. Enhancing methane production from anaerobic digestion of secondary sludge through lignosulfonate addition: Feasibility, mechanisms, and implications. BIORESOURCE TECHNOLOGY 2023; 390:129868. [PMID: 37844805 DOI: 10.1016/j.biortech.2023.129868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 10/10/2023] [Accepted: 10/10/2023] [Indexed: 10/18/2023]
Abstract
This study explores the feasibility of using lignosulfonate, a byproduct of the pulp and paper industry, to facilitate sludge anaerobic digestion. Biochemical methane potential assays revealed that the maximum methane production was achieved at 60 mg/g volatile solids (VS) lignosulfonate, 22.18 % higher than the control. One substrate model demonstrated that 60 mg/g VS lignosulfonate boosted the hydrolysis rate, biochemical methane potential, and degradation extent of secondary sludge by 19.12 %, 21.87 %, and 21.11 %, respectively, compared to the control. Mechanisms unveiled that lignosulfonate destroyed sludge stability, promoted organic matter release, and enhanced subsequent hydrolysis, acidification, and methanogenesis by up to 31.30 %, 74.42 % and 28.16 %, respectively. Phytotoxicity assays confirmed that lignosulfonate promoted seed germination and root development of lettuce and Chinese cabbage, with seed germination index reaching 170 ± 10 % and 220 ± 22 %, respectively. The findings suggest that lignosulfonate addition offers a sustainable approach to sludge treatment, guiding effective management practices.
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Affiliation(s)
- Zhenyao Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Xuan Li
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia.
| | - Huan Liu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Ting Zhou
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Jibin Li
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Muhammad Ahmar Siddiqui
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; Department of Civil and Environmental Engineering, Water Technology Center, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Carol Sze Ki Lin
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Mohammad Rafe Hatshan
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Siyu Huang
- Australian Centre for Microscopy and Microanalysis, The University of Sydney, NSW 2006, Australia
| | - Julie M Cairney
- Australian Centre for Microscopy and Microanalysis, The University of Sydney, NSW 2006, Australia
| | - Qilin Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia.
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13
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Li J, Li X, Liu H, Gao L, Wang W, Wang Z, Zhou T, Wang Q. Climate change impacts on wastewater infrastructure: A systematic review and typological adaptation strategy. WATER RESEARCH 2023; 242:120282. [PMID: 37399688 DOI: 10.1016/j.watres.2023.120282] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 06/27/2023] [Accepted: 06/28/2023] [Indexed: 07/05/2023]
Abstract
Wastewater infrastructures play an indispensable role in society's functioning, human production activities, and sanitation safety. However, climate change has posed a serious threat to wastewater infrastructures. To date, a comprehensive summary with rigorous evidence evaluation for the impact of climate change on wastewater infrastructure is lacking. We conducted a systematic review for scientific literature, grey literature, and news. In total, 61,649 documents were retrieved, and 96 of them were deemed relevant and subjected to detailed analysis. We developed a typological adaptation strategy for city-level decision-making for cities in all-income contexts to cope with climate change for wastewater structures. 84% and 60% of present studies focused on the higher-income countries and sewer systems, respectively. Overflow, breakage, and corrosion were the primary challenge for sewer systems, while inundation and fluctuation of treatment performance were the major issues for wastewater treatment plants. In order to adapt to the climate change impact, typological adaptation strategy was developed to provide a simple guideline to rapidly select the adaptation measures for vulnerable wastewater facilities for cities with various income levels. Future studies are encouraged to focus more on the model-related improvement/prediction, the impact of climate change on other wastewater facilities besides sewers, and countries with low or lower-middle incomes. This review provided insight to comprehensively understand the climate change impact on wastewater facilities and facilitate the policymaking in coping with climate change.
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Affiliation(s)
- Jibin Li
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, the University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Xuan Li
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, the University of Technology Sydney, Ultimo, NSW 2007, Australia.
| | - Huan Liu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, the University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Li Gao
- South East Water, 101 Wells Street, Frankston, VIC 3199, Australia
| | - Weitong Wang
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Kemistintie 1, Espoo, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Zhenyao Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, the University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Ting Zhou
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, the University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Qilin Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, the University of Technology Sydney, Ultimo, NSW 2007, Australia.
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14
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Li W, Pang L, Chatzisymeon E, Yang P. Effects of micron-scale zero valent iron on behaviors of antibiotic resistance genes and pathogens in thermophilic anaerobic digestion of waste activated sludge. BIORESOURCE TECHNOLOGY 2023; 376:128895. [PMID: 36931448 DOI: 10.1016/j.biortech.2023.128895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 03/09/2023] [Accepted: 03/11/2023] [Indexed: 06/18/2023]
Abstract
This work investigated the metagenomics-based behavior and risk of antibiotic resistance genes (ARGs), and their potential hosts during thermophilic anaerobic digestion (TAD) of waste activated sludge, enhanced by micron-scale zero valent iron (mZVI). Tests were conducted with 0, 25, 100, and 250 mg mZVI/g total solids (TS). Results showed that up to 7.3% and 4.8% decrease in ARGs' abundance and diversity, respectively, were achieved with 100 mg mZVI/g TS. At these conditions, ARGs with health risk in abundance and human pathogenic bacteria (HPB) diversity were also decreased by 8.3% and 3.6%, respectively. Additionally, mZVI reduced abundance of 72 potential pathogenic supercarriers for ARGs with high health risk by 2.5%, 5.0%, and 6.1%, as its dosage increased. Overall, mZVI, especially at 100 mg/g TS, can mitigate antibiotic resistance risk in TAD. These findings are important for better understanding risks of ARGs and their pathogenic hosts in ZVI-enhanced TAD of solid wastes.
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Affiliation(s)
- Wenqian Li
- College of Architecture and Environment, Sichuan University, Chengdu 610065, PR China
| | - Lina Pang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, PR China.
| | - Efthalia Chatzisymeon
- School of Engineering, Institute for Infrastructure and Environment, The University of Edinburgh, Edinburgh EH9 3JL, United Kingdom
| | - Ping Yang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, PR China
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15
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Li X, Liu H, Zhang Z, Zhou T, Wang Q. Sulfite pretreatment enhances the medium-chain fatty acids production from waste activated sludge anaerobic fermentation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 871:162080. [PMID: 36754319 DOI: 10.1016/j.scitotenv.2023.162080] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/01/2023] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
Production of high-value medium chain fatty acids (MCFAs) from anaerobic fermentation of waste activated sludge (WAS) has been considered as a promising alternative for renewable energy resources. However, the low biodegradability of WAS greatly limits the anaerobic fermentation performance. This study proposed and demonstrated a novel approach, sulfite pretreatment, to efficiently produce MCFAs through anaerobic fermentation of WAS. Pretreatment of WAS at a sulfite concentration of 100-500 mg S/L for 24 h effectively improved the MCFAs production and MCFAs selectivity and the promotion effect was positively correlated with the sulfite concentration used in pretreatment (Pearson's R > 0.9). The maximum MCFAs production of 6.84 g COD/L and MCFAs selectivity of 39.1 % were both achieved under 500 mg S/L sulfite pretreatment, which accounts for 2.6 times and 2.4 times of the control, respectively (MCFAs production of 2.62 g COD/L and MCFAs selectivity of 16.4 % in the control). Sulfite pretreatment also enhanced the WAS degradation from 25 ± 2 % in the control to a maximum of 39 ± 2 % under 500 mg S/L sulfite pretreatment. The electron transfer efficiency and COD flows from the substrate to products were enhanced by up to 25 % due to the sulfite pretreatment, which supports the enhanced WAS degradation. Sulfite pretreatment also promoted the solubilization, hydrolysis, and acidification processes during the anaerobic fermentation by up to 200 %, 60 %, and 45 %, respectively, which subsequently makes more substrates available for MCFAs production. The findings from this study provide a potential solution of using industrial sulfite-laden wastes for WAS pretreatment, to enhance the MCFAs production at a minimized cost.
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Affiliation(s)
- Xuan Li
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Huan Liu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia.
| | - Zehao Zhang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Ting Zhou
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Qilin Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia.
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16
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Geng W, Feng Y, Chen Y, Zhang X, Zhang H, Yang F, Wang X. Interactions of Amino Group Functionalized Tetraphenylvinyl and DNA: A Label-Free "On-Off-On" Fluorescent Aptamer Sensor toward Ampicillin. BIOSENSORS 2023; 13:bios13050504. [PMID: 37232865 DOI: 10.3390/bios13050504] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/22/2023] [Accepted: 04/26/2023] [Indexed: 05/27/2023]
Abstract
As a type of aggregation-induced emission (AIE) fluorescent probe, tetraphenylvinyl (TPE) or its derivatives are widely used in chemical imaging, biosensing and medical diagnosis. However, most studies have focused on molecular modification and functionalization of AIE to enhance the fluorescence emission intensity. There are few studies on the interaction between aggregation-induced emission luminogens (AIEgens) and nucleic acids, which was investigated in this paper. Experimental results showed the formation of a complex of AIE/DNA, leading to the quenching of the fluorescence of AIE molecules. Fluorescent test experiments with different temperatures proved that the quenching type was static quenching. The quenching constants, binding constants and thermodynamic parameters demonstrated that electrostatic and hydrophobic interactions promoted the binding process. Then, a label-free "on-off-on" fluorescent aptamer sensor for the detection of ampicillin (AMP) was constructed based on the interaction between the AIE probe and the aptamer of AMP. Linear range of the sensor is 0.2-10 nM with a limit of detection 0.06 nM. This fluorescent sensor was applied to detect AMP in real samples.
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Affiliation(s)
- Weifu Geng
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Yan Feng
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Yu Chen
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Xin Zhang
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Haoyi Zhang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Fanfan Yang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Xiuzhong Wang
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, China
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
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17
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Nnorom MA, Saroj D, Avery L, Hough R, Guo B. A review of the impact of conductive materials on antibiotic resistance genes during the anaerobic digestion of sewage sludge and animal manure. JOURNAL OF HAZARDOUS MATERIALS 2023; 446:130628. [PMID: 36586329 DOI: 10.1016/j.jhazmat.2022.130628] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 12/12/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
The urgent need to reduce the environmental burden of antibiotic resistance genes (ARGs) has become even more apparent as concerted efforts are made globally to tackle the dissemination of antimicrobial resistance. Concerning levels of ARGs abound in sewage sludge and animal manure, and their inadequate attenuation during conventional anaerobic digestion (AD) compromises the safety of the digestate, a nutrient-rich by-product of AD commonly recycled to agricultural land for improvement of soil quality. Exogenous ARGs introduced into the natural environment via the land application of digestate can be transferred from innocuous environmental bacteria to clinically relevant bacteria by horizontal gene transfer (HGT) and may eventually reach humans through food, water, and air. This review, therefore, discusses the prospects of using carbon- and iron-based conductive materials (CMs) as additives to mitigate the proliferation of ARGs during the AD of sewage sludge and animal manure. The review spotlights the core mechanisms underpinning the influence of CMs on the resistome profile, the steps to maximize ARG attenuation using CMs, and the current knowledge gaps. Data and information gathered indicate that CMs can profoundly reduce the abundance of ARGs in the digestate by easing selective pressure on ARGs, altering microbial community structure, and diminishing HGT.
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Affiliation(s)
- Mac-Anthony Nnorom
- Centre for Environmental Health and Engineering (CEHE), Department of Civil and Environmental Engineering, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - Devendra Saroj
- Centre for Environmental Health and Engineering (CEHE), Department of Civil and Environmental Engineering, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - Lisa Avery
- The James Hutton Institute, Craigiebuckler, Aberdeen AB15 8QH, United Kingdom
| | - Rupert Hough
- The James Hutton Institute, Craigiebuckler, Aberdeen AB15 8QH, United Kingdom
| | - Bing Guo
- Centre for Environmental Health and Engineering (CEHE), Department of Civil and Environmental Engineering, University of Surrey, Guildford GU2 7XH, United Kingdom.
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Li S, Ondon BS, Ho SH, Li F. Emerging soil contamination of antibiotics resistance bacteria (ARB) carrying genes (ARGs): New challenges for soil remediation and conservation. ENVIRONMENTAL RESEARCH 2023; 219:115132. [PMID: 36563979 DOI: 10.1016/j.envres.2022.115132] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/04/2022] [Accepted: 12/18/2022] [Indexed: 06/17/2023]
Abstract
Soil plays a vital role as a nutrient source for microflora and plants in ecosystems. The accumulation and proliferation of antibiotics resistance bacteria (ARB) and antibiotics resistance genes (ARGs) causes emerging soil contamination and pollution, posing new challenges for soil remediation, recovery, and conservation. Fertilizer application in agriculture is one of the most important sources of ARB and ARGs contamination in soils. The recent existing techniques for the remediation of soil polluted with ARB and ARGs are very limited in terms of ARB and ARGs removal in soil. Bioelectrochemical remediation using bioelectrochemical systems such as microbial fuel cells and microbial electrolysis cells are promising technologies for the removal of ARB and ARGs in soil. Herein, diverse sources of ARB and ARGs in soil have been reviewed, their effects on soil microbial diversity have been analyzed, and the causes of ARB and ARGs rapid proliferation in soil are explained. Bioelectrochemical systems used for the remediation of soil contaminated with ARB and ARGs is still in its infancy stage and presents serious disadvantage and limits, therefore it needs to be well understood and implemented. In general, merging soil contamination of ARB and ARGs is an increasing concern threatening the soil ecosystem while the remediation technologies are still challenging. Efforts need to be made to develop new, effective, and efficient technologies for soil remediation and conservation to tackle the spread of ARB and ARGs and overcome the new challenges posed by ARB and ARGs contamination in soil.
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Affiliation(s)
- Shengnan Li
- Key Laboratory of Pollution Processes and Environmental Criteria at the Ministry of Education, Tianjin, China; Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Brim Stevy Ondon
- Key Laboratory of Pollution Processes and Environmental Criteria at the Ministry of Education, Tianjin, China; Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China
| | - Shih-Hsin Ho
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Fengxiang Li
- Key Laboratory of Pollution Processes and Environmental Criteria at the Ministry of Education, Tianjin, China; Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China.
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19
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Wang B, Song L, Li W, Hou L, Li J, Xu X, Sheng G. Distribution and migration of antibiotic resistance genes, as well as their correlation with microbial communities in swine farm and its surrounding environments. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 316:120618. [PMID: 36368555 DOI: 10.1016/j.envpol.2022.120618] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 10/30/2022] [Accepted: 11/05/2022] [Indexed: 06/16/2023]
Abstract
The prevalence and correlation of antibiotic resistance genes (ARGs) in pig farm wastewater treatment plants (WWTPs) and surrounding environment were investigated using metagenomics and real time quantitative PCR (q-PCR). The hosts of ARGs were also studied in this study. The abundance of ARGs decreased significantly in the anoxic/oxic (A/O) process and disinfection tank of WWTPs. New ARGs emerged in wastewater that passed though the anaerobic reactor. The abundances of ARGs in the soils and water near pig farm were 10- and 35-fold higher than those in the control, respectively. The abundance of ARGs in wells near pig farm were an order of magnitude higher than that in the control. Similarly, a high abundance of ARGs was detected in swine manure. After composting, most of the ARGs were eliminated, but sul1 increased 10.5-fold. A high-throughput analysis revealed that the pig farm altered the microbial community structure in the surrounding environment, with 52% and 37% of the operational taxonomic units (OTUs) endemic to the soil and water samples near pig farm in comparison with these data in the control, respectively. The phyla Proteobacteria, Choroflexi, and Actinobacteriota dominated the water and soil samples. In addition, three pathogenic genera were found in the surrounding soil and water samples. A metagenomic analysis identified 14 types of ARGs (>1%), with the highest proportion of multidrug ARGs at 47%. A total of 28 subtypes of ARGs were detected (>1%), with macB the most prevalent. The correlation analysis revealed that several key phyla, including Proteobacteria, Actinobacteria and Acidobacteria, were the main potential hosts and posed a positive correlation with the ARGs. Efflux pumps (60-66%) were the primary resistance mechanism, and each resistance mechanism was distributed in similar proportions in the microbial community.
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Affiliation(s)
- Bin Wang
- College of Civil Engineering, Guizhou Provincial Key Laboratory of Rock and Soil Mechanics and Engineering Safety, Guizhou University, Guiyang, 550025, China; Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China; Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China.
| | - Lei Song
- College of Civil Engineering, Guizhou Provincial Key Laboratory of Rock and Soil Mechanics and Engineering Safety, Guizhou University, Guiyang, 550025, China
| | - Wenjia Li
- College of Civil Engineering, Guizhou Provincial Key Laboratory of Rock and Soil Mechanics and Engineering Safety, Guizhou University, Guiyang, 550025, China
| | - Li'an Hou
- Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China; Xi'an High-Tech Institute, Xi'an, 710025, China
| | - Jiang Li
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, China
| | - Xiaoyi Xu
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Guishang Sheng
- College of Civil Engineering, Guizhou Provincial Key Laboratory of Rock and Soil Mechanics and Engineering Safety, Guizhou University, Guiyang, 550025, China
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20
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Zhou K, Yang Y, Liu B, Tian G, Jiang Z, Bian B. Waste to worth: A new approach to treat wastewater sludge. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Liu H, Li X, Zhang Z, Nghiem LD, Wang Q. Urine pretreatment significantly promotes methane production in anaerobic waste activated sludge digestion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 853:158684. [PMID: 36096217 DOI: 10.1016/j.scitotenv.2022.158684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 09/07/2022] [Accepted: 09/07/2022] [Indexed: 06/15/2023]
Abstract
Methane production of waste activated sludge (WAS) in anaerobic digestion is hindered due to the rate-limited hydrolysis process and the low methane potential of WAS. Pretreatment of WAS is a common and appealing strategy to improve methane production in anaerobic digestion. In this study, we proposed to use urine, an easily obtained human waste with high ammonium concentration and pH, as a novel pretreatment strategy for anaerobic WAS digestion. Urine pretreatment at levels of 5-30 % (Vurine/Vurine+WAS) could substantially enhance methane production by 5-35 % in biochemical methane potential (BMP) tests, with the highest methane production of 179.6 ± 3.3 mL/g volatile solids (VS) achieved under the highest level of urine (i.e. 30 % urine addition). Based on the model analysis, the biochemical methane potential (B0) and hydrolysis rate of WAS (k) rose from 131.9 mL/g VS and 0.19 d-1 in the control without pretreatment to 136.3-178.2 mL/g VS and 0.22-0.30 d-1, respectively, after the urine pretreatment (5-30 % addition). Urine pretreatment with 5-30 % addition also improved the degradation extent (Y) of WAS by 3-35 %. The promising results indicate that urine pretreatment in anaerobic digestion is a promising technology to improve the efficiency of anaerobic digestion with environmental and economic benefits.
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Affiliation(s)
- Huan Liu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Xuan Li
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Zehao Zhang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Long D Nghiem
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Qilin Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia.
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22
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Pharmaceuticals and Personal Care Products in the Environment with Emphasis on Horizontal Transfer of Antibiotic Resistance Genes. CHEMISTRY-DIDACTICS-ECOLOGY-METROLOGY 2022. [DOI: 10.2478/cdem-2022-0005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Abstract
Pharmaceuticals and personal care products (PPCPs) discharged into environment has several adverse impacts. PPCPs are widely utilised for veterinary as well as cosmetic and personal health reasons. These are members of the expanding class of substances known as Contaminants of Emerging Concern (CECs). Antibiotic resistance in the environment and garbage generated by PPCP endanger life. The World Health Organisation (WHO) now recognises antibiotic resistance as a significant global health problem due to the expected increase in mortality caused by it. In the past ten years, mounting data has led experts to believe that the environment has a significant impact on the development of resistance. For human diseases, the external environment serves as a source of resistance genes. It also serves as a major pathway for the spread of resistant bacteria among various habitats and human populations. Large-scale DNA sequencing methods are employed in this thesis to better comprehend the dangers posed by environmental antibiotic resistance. The quantification of the number is an important step in this process. Metagenomic measurement of the number of antibiotic resistance genes in various contexts is a crucial step in this process. However, it’s also crucial to put this data into a broader context by integrating things like taxonomic information, antibiotic concentrations, and the genomic locations of found resistance genes.
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23
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Xu XJ, Yan J, Yuan QK, Wang XT, Yuan Y, Ren NQ, Lee DJ, Chen C. Enhanced methane production in anaerobic digestion: A critical review on regulation based on electron transfer. BIORESOURCE TECHNOLOGY 2022; 364:128003. [PMID: 36155810 DOI: 10.1016/j.biortech.2022.128003] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 09/14/2022] [Accepted: 09/16/2022] [Indexed: 06/16/2023]
Abstract
Anaerobic digestion (AD) is a potential bioprocess for waste biomass utilization and energy conservation. Various iron/carbon-based CMs (e.g., magnetite, biochar, granular activated carbon (GAC), graphite and zero valent iron (ZVI)) have been supplemented in anaerobic digestors to improve AD performance. Generally, the supplementation of CMs has shown to improve methane production, shorten lag phase and alleviate environmental stress because they could serve as electron conduits and promote direct interspecies electron transfer (DIET). However, the CMs dosage varied greatly in previous studies and CMs wash out remains a challenge for its application in full-scale plants. Future work is recommended to standardize the CMs dosage and recover/reuse the CMs. Moreover, additional evidence is required to verify the electrotrophs involved in DIET.
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Affiliation(s)
- Xi-Jun Xu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China
| | - Jin Yan
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China
| | - Qing-Kang Yuan
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China
| | - Xue-Ting Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China
| | - Yuan Yuan
- College of Biological Engineering, Beijing Polytechnic, Beijing 10076, China
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China
| | - Duu-Jong Lee
- Department of Mechanical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; Department of Chemical Engineering & Materials Science, Yuan-Ze University, Chungli 320, Taiwan
| | - Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province 150090, China.
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24
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Zhang J, Lu T, Xin Y, Wei Y. Ferric chloride further simplified the horizontal gene transfer network of antibiotic resistance genes in anaerobic digestion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 844:157054. [PMID: 35780898 DOI: 10.1016/j.scitotenv.2022.157054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 06/13/2022] [Accepted: 06/25/2022] [Indexed: 06/15/2023]
Abstract
The role of ferric chloride (FC) on the reduction of antibiotic resistance genes (ARGs) in anaerobic digestion (AD) system was investigated from the perspective of vertical (VGT) and horizontal gene transfer (HGT) network through the high-throughput qPCR (HT-qPCR). Although FC showed limited impacts on methane production in AD of swine manure, the tetracycline and MLSB resistance genes were specifically reduced at the end, where tetQ of antibiotic target protection and ermF of antibiotic target alteration contributed the most to the reduction. Both VGT and HGT network were divided into three modules, and the complexity of HGT network was largely reduced along with AD, where the HGT connection was reduced from 683 (Module III) to 172 (Module I), and FC addition could further reduce the relative abundance of ARG hosts in Module I. The contribution of VGT and HGT to the changes of ARGs in AD was further deciphered, and although the VGT reflected by the changes of microbial community contributed the most to the dynamics of ARGs (68.0 %), the HGT contribution could further be reduced by the FC addition. This study provided a new perspective on the fate of ARGs response to the FC addition in the AD system.
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Affiliation(s)
- Junya Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research - UFZ, Leipzig 04318, Germany; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Tiedong Lu
- Agricultural Resource and Environment Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China
| | - Yuan Xin
- College of Life Science and Technology, Guangxi University, Nanning 530005, Guangxi, China
| | - Yuansong Wei
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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25
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Zhang C, Yang X, Tan X, Wan C, Liu X. Sewage sludge treatment technology under the requirement of carbon neutrality: Recent progress and perspectives. BIORESOURCE TECHNOLOGY 2022; 362:127853. [PMID: 36037839 DOI: 10.1016/j.biortech.2022.127853] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/21/2022] [Accepted: 08/22/2022] [Indexed: 06/15/2023]
Abstract
In the context of climate policies that advocate carbon neutrality, carbon emission reduction provides a new restriction in evaluating the waste activated sludge (WAS) treatment technologies and procedures. This review provides an overview of current researches and development efforts in WAS treatment, focusing on the dual attributes of WAS as contaminants and resources. Firstly, the improved technical requirements posed by heavy metals, micro(nano) plastics, or other emerging plastics in WAS are studied. Furthermore, in terms of carbon emission reduction, the applications and limitations of widely deployed WAS treatment technologies are discussed. Based on carbon neutrality requirements, the anaerobic co-digestion and co-pyrolysis technologies are comprehensively discussed from the views of pollutants removing efficiencies, enhancement methods, carbon emissions, and resource recovery. Finally, a workable new route for WAS treatment is proposed for future technological advancement and engineering innovation.
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Affiliation(s)
- Chen Zhang
- Shanghai Municipal Engineering Design Institute (Group) Co., LTD., Shanghai 200092, China
| | - Xue Yang
- Shanghai Municipal Engineering Design Institute (Group) Co., LTD., Shanghai 200092, China
| | - Xuejun Tan
- Shanghai Municipal Engineering Design Institute (Group) Co., LTD., Shanghai 200092, China
| | - Chunli Wan
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
| | - Xiang Liu
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China.
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26
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Haffiez N, Chung TH, Zakaria BS, Shahidi M, Mezbahuddin S, Maal-Bared R, Dhar BR. Exploration of machine learning algorithms for predicting the changes in abundance of antibiotic resistance genes in anaerobic digestion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 839:156211. [PMID: 35623518 DOI: 10.1016/j.scitotenv.2022.156211] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 04/29/2022] [Accepted: 05/20/2022] [Indexed: 06/15/2023]
Abstract
The land application of digestate from anaerobic digestion (AD) is considered a significant route for transmitting antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs) to ecosystems. To date, efforts towards understanding complex non-linear interactions between AD operating parameters with ARG/MGE abundances rely on experimental investigations due to a lack of mechanistic models. Herein, three different machine learning (ML) algorithms, Random Forest (RF), eXtreme Gradient Boosting (XGBoost), and Artificial Neural Network (ANN), were compared for their predictive capacities in simulating ARG/MGE abundance changes during AD. The models were trained and cross-validated using experimental data collected from 33 published literature. The comparison of model performance using coefficients of determination (R2) and root mean squared errors (RMSE) indicated that ANN was more reliable than RF and XGBoost. The mode of operation (batch/semi-continuous), co-digestion of food waste and sewage sludge, and residence time were identified as the three most critical features in predicting ARG/MGE abundance changes. Moreover, the trained ANN model could simulate non-linear interactions between operational parameters and ARG/MGE abundance changes that could be interpreted intuitively based on existing knowledge. Overall, this study demonstrates that machine learning can enable a reliable predictive model that can provide a holistic optimization tool for mitigating the ARG/MGE transmission potential of AD.
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Affiliation(s)
- Nervana Haffiez
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Tae Hyun Chung
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Basem S Zakaria
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | | | | | | | - Bipro Ranjan Dhar
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
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27
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Deng Y, Zhang K, Zou J, Li X, Wang Z, Hu C. Electron shuttles enhanced the removal of antibiotics and antibiotic resistance genes in anaerobic systems: A review. Front Microbiol 2022; 13:1004589. [PMID: 36160234 PMCID: PMC9490129 DOI: 10.3389/fmicb.2022.1004589] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 08/19/2022] [Indexed: 11/13/2022] Open
Abstract
The environmental and epidemiological problems caused by antibiotics and antibiotic resistance genes have attracted a lot of attention. The use of electron shuttles based on enhanced extracellular electron transfer for anaerobic biological treatment to remove widespread antibiotics and antibiotic resistance genes efficiently from wastewater or organic solid waste is a promising technology. This paper reviewed the development of electron shuttles, described the mechanism of action of different electron shuttles and the application of enhanced anaerobic biotreatment with electron shuttles for the removal of antibiotics and related genes. Finally, we discussed the current issues and possible future directions of electron shuttle technology.
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28
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Pang H, Dorian B, Gao L, Xie Z, Cran M, Muthukumaran S, Sidiroglou F, Gray S, Zhang J. Remediation of poly-and perfluoroalkyl substances (PFAS) contaminated soil using gas fractionation enhanced technology. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 827:154310. [PMID: 35257781 DOI: 10.1016/j.scitotenv.2022.154310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/28/2022] [Accepted: 03/01/2022] [Indexed: 06/14/2023]
Abstract
This study investigated a gas fractionation enhanced soil washing method for poly-and perfluoroalkyl substances (PFAS) removal from contaminated soil. With the assistance of gas fractionation, PFAS removal was increased by a factor of 9, compared to the conventional soil washing method. Pre-extraction (pre-treatment) of the soil with water before gas fractionation enhanced PFAS removal from soil. The optimum extraction time varied based on the soil particle size, since it will change the swelling time of the soil. The influence of various operational conditions such as water to soil mass ratio (W:S ratio), gas type in fractionation, gas flowrate, fractionation time and soil pre-treatment condition have been studied to identify the critical influencing factors. Among various W:S ratios (2, 4, 5, 6, 8, and 10) studied, higher W:S ratio resulted in better PFAS removals, but PFAS removal began to plateau as the W:S ratio increased. PFAS removal could be improved by repeated treatment with low water consumption. Air, oxygen, and ozone generated by air and oxygen were used, in which ozone generated by oxygen achieved the highest PFAS removals of 55.9%. Among different fractionation times (10 min, 20 min and 30 min), a fractionation time of 20 min achieved better total PFAS removal for studied soil, because PFOS was the dominant species in the total PFAS. However, the removal of some PFAS species, such as PFHxS, would be increased with extended fractionation time. With constant fractionation time (10 min), PFAS removal performance improved with the increasing gas flowrate.
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Affiliation(s)
- Hongjiao Pang
- Institute for Sustainable Industries and Liveable Cities, Victoria University, Werribee, VIC 3030, Australia; Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3000, Australia
| | | | - Li Gao
- Institute for Sustainable Industries and Liveable Cities, Victoria University, Werribee, VIC 3030, Australia; South East Water Corporation, PO Box 2268, Seaford, Victoria 3198, Australia
| | - Zongli Xie
- CSIRO Manufacturing, Private Bag 10, Clayton South MDC, VIC 3169, Australia
| | - Marlene Cran
- Institute for Sustainable Industries and Liveable Cities, Victoria University, Werribee, VIC 3030, Australia
| | - Shobha Muthukumaran
- Institute for Sustainable Industries and Liveable Cities, Victoria University, Werribee, VIC 3030, Australia
| | - Fotios Sidiroglou
- Institute for Sustainable Industries and Liveable Cities, Victoria University, Werribee, VIC 3030, Australia
| | - Stephen Gray
- Institute for Sustainable Industries and Liveable Cities, Victoria University, Werribee, VIC 3030, Australia
| | - Jianhua Zhang
- Institute for Sustainable Industries and Liveable Cities, Victoria University, Werribee, VIC 3030, Australia.
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29
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Haffiez N, Chung TH, Zakaria BS, Shahidi M, Mezbahuddin S, Hai FI, Dhar BR. A critical review of process parameters influencing the fate of antibiotic resistance genes in the anaerobic digestion of organic waste. BIORESOURCE TECHNOLOGY 2022; 354:127189. [PMID: 35439559 DOI: 10.1016/j.biortech.2022.127189] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/13/2022] [Accepted: 04/15/2022] [Indexed: 06/14/2023]
Abstract
The overuse and inappropriate disposal of antibiotics raised severe public health risks worldwide. Specifically, the incomplete antibiotics metabolism in human and animal bodies contributes to the significant release of antibiotics into the natural ecosystems and the proliferation of antibiotic-resistant bacteria carrying antibiotic-resistant genes. Moreover, the organic feedstocks used for anaerobic digestion are often highly-rich in residual antibiotics and antibiotic-resistant genes. Hence, understanding their fate during anaerobic digestion has become a significant research focus recently. Previous studies demonstrated that various process parameters could considerably influence the propagation of the antibiotic-resistant genes during anaerobic digestion and their transmission via land application of digestate. This review article scrutinizes the influences of process parameters on antibiotic-resistant genes propagation in anaerobic digestion and the inherent fundamentals behind their effects. Based on the literature review, critical research gaps and challenges are summarized to guide the prospects for future studies.
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Affiliation(s)
- Nervana Haffiez
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Tae Hyun Chung
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Basem S Zakaria
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Manjila Shahidi
- 4S Analytics & Modelling Ltd., Edmonton, AB, T6W 3V6, Canada
| | | | - Faisal I Hai
- Strategic Water Infrastructure Laboratory, School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Bipro Ranjan Dhar
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
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