Review
Green & Sustainable Science & Technology
Ye Li, Fan Tang, Dan Xu, Bing Xie
Summary: With the increase in municipal solid waste output, landfill leachate treatment has become a major concern. This paper reviews different biological treatment methods, highlighting the higher efficiency of nitrogen removal in processes combined with microorganisms.
Article
Environmental Sciences
Bahar Yavuzturk Gul, Hazal Gulhan, Suleyman Soyel, Recep Kaya, Mustafa Evren Ersahin, Suleyman Ovez, Ismail Koyuncu
Summary: This study evaluates the performance of a long-term full-scale membrane bioreactor (MBR) in treating landfill leachate and analyzes the influence of leachate structure and operational conditions on filamentous bacteria overgrowth. The system showed high removal efficiencies for chemical oxygen demand (COD) and NH4-N, but incomplete denitrification occurred at low F/M ratios. The high C/N ratio increased the frequency of small flocs, and a poor to medium microbial community diversity was observed. The identified filamentous organisms included Haliscomenobacter hydrossis, Microthrix parvicella, and Type 021N. This study provides pioneering perspectives into landfill leachate remediation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Sajjad Karimi, Christopher A. Bareither
Summary: The study reveals that increasing the dose volume and frequency of liquid dosing can accelerate the methane generation rate of municipal solid waste, reducing the lag time for generation. For reactors with dose volumes of 40, 80, and 160 L/Mg-MSW, increasing dose frequency results in a more pronounced increase in methane generation rate and decrease in lag time.
Article
Environmental Sciences
Ashish Kumar Singh, Suraj Prabhakarrao Nakhate, Rakesh Kumar Gupta, Atul Rajkumar Chavan, Bhagyashri Jagdishprasad Poddar, Om Prakash, Yogesh S. Shouche, Hemant J. Purohit, Anshuman Arun Khardenavis
Summary: This study characterized the microbial community at different depths of a landfill to assess their roles as methane sinks. The results showed anaerobic degradation of organic matter in the bottom soil and active aerobic denitrification in the top soil. The top soil had a higher abundance of aerobic methanotrophs, while the bottom soil had a dominance of anaerobic methanogens. The findings provide a better understanding of the relationship between methanotrophs and their environment in landfills.
ENVIRONMENTAL RESEARCH
(2022)
Article
Soil Science
Dinu S. Attalage, Patrick A. Hettiaratchi, Poornima Jayasinghe, Peter F. Dunfield, Angela Smirnova, Upeksha K. Rathnavibushana, Melissa Erkmen, Sunil Kumar
Summary: The study found that vegetation decreases methane oxidation at high loading rates, regardless of the type of vegetation. Bare-soil columns exhibited the highest methane oxidation rate, possibly due to increased permeability created by plant root systems.
SOIL BIOLOGY & BIOCHEMISTRY
(2022)
Article
Environmental Sciences
Arpita Ghosh, Sunil Kumar, Jit Das
Summary: Globally, the increase in solid waste generation and the risks posed by climate change are major concerns. The widespread practice of landfill disposal of municipal solid waste is expanding with population growth and urbanization. Properly treated waste can be used to produce renewable energy. The recent COP 27 event emphasized the production of renewable energy to achieve the Net Zero target. Landfills are the most significant anthropogenic source of methane emission, which is both a greenhouse gas and a main component of biogas. Landfill leachate and methane emissions are discussed in this study, with a focus on reducing methane emission technology and its environmental impact. The combined therapy method is suggested for treating mixed leachate. Circular material management, entrepreneurship ideas, blockchain, machine learning, life cycle assessment (LCA) in waste management, and economic benefits from methane production are emphasized. Bibliometric analysis of 908 articles from the past 37 years shows that industrialized nations, particularly the United States, dominate research in this field.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Biotechnology & Applied Microbiology
Mark C. Reynolds, Damien Finn, Analissa F. Sarno, Richard Allen, J. David Deathrage, Rosa Krajmalnik-Brown, Hinsby Cadillo-Quiroz
Summary: Studies have found distinct methanogenic niches within landfills, influenced by geochemical gradients developed under extended and age-dependent waste biodegradation stages. The microbial and geochemical composition of leachate in landfills can affect CH4 production, niche partitioning, and methanogenic activity.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Rathborey Chan, Wilai Chiemchaisri, Chart Chiemchaisri
Summary: Methane emission and oxidation in different bio-cover materials were studied at a landfill site in Thailand. The bio-cover was purged with landfill gas and methane reduction through biological oxidation was investigated. Methane emissions varied between media and were influenced by rainfall. The highest methane removals were found in sandy loam, followed by compost and stabilized wastes, with compost having the highest oxidation capacities and greater methanotroph population.
APPLIED SCIENCES-BASEL
(2023)
Article
Agronomy
Tangzhe Nie, Jianyi Huang, Zhongxue Zhang, Peng Chen, Tiecheng Li, Changlei Dai
Summary: Through a multi-year in-situ experiment, it was found that consecutive five-year straw incorporation increased the content of NH4+-N, NO3--N, dissolved organic carbon (DOC), and soil microbial biomass carbon (MBC), resulting in a 4.42-5.84% increase in rice yield. Controlled irrigation significantly reduced CH4 emissions in Mollisols by 70.2-79.7%, and this reduction was more significant under five-year straw incorporation. The decrease in CH4 emissions under controlled irrigation was mainly due to the decrease in DOC content and the difference in relative abundance between methanogens and methanotrophs.
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Engineering, Multidisciplinary
He Pinjing, Chen JunLan, Shao Liming, Zhang Hua, Lu Fan
Summary: Landfilling is a common method of waste disposal in loess regions, with loess often used as landfill cover soil. This study proposed a method to improve methane removal capacity of loess by amelioration with mature landfill leachate, leading to significant increase in organic matter content and methane-oxidizing bacteria abundance. The methane removal rate of ameliorated loess was significantly higher than that of water-irrigated loess, with potential for achieving carbon neutrality in global loess landfill sites.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2021)
Article
Engineering, Environmental
Jing Wang, Chen Wang, Yi-Xuan Chu, Guangming Tian, Ruo He
Summary: Landfill cover soil is crucial for controlling methane emission from landfills. This study investigated the effects of dimethyl sulfide (DMS) on methanotrophs in landfill cover soils. The results showed that methanotroph activity was inhibited at higher concentrations of DMS. DMS was primarily oxidized to sulfate in the soil. Methanotrophs belonging to the gamma-Proteobacteria and alpha-Proteobacteria were dominant, with some species showing tolerance to DMS and others being inhibited. Methanotrophs in the soil had the ability to metabolize sulfur compounds, suggesting their potential application for methane and sulfur compound co-removal in engineering.
Article
Environmental Sciences
Alexandra M. Catena, Jie Zhang, Roisin Commane, Lee T. Murray, Margaret J. Schwab, Eric M. Leibensperger, Joseph Marto, Mackenzie L. Smith, James J. Schwab
Summary: This study used laser-based methods to measure the mixing ratios of hydrogen sulfide (H2S) and methane (CH4) at two landfills in New York State. The results show spatial and sample-to-sample variability in the mixing ratios and emission fluxes of pollutants at the landfills, which may be influenced by various factors.
Article
Engineering, Environmental
Hasan Pasalari, Ali Esrafili, Abbas Rezaee, Mitra Gholami, Mahdi Farzadkia
Summary: The study investigated the use of electrochemical oxidation (EO) to improve the biodegradability and energy output of landfill leachate (LL) in anaerobic co-digestion processes. Optimal operational parameters were identified for increased soluble COD (sCOD) and total volatile fatty acid (TVFA), resulting in higher methane yield and energy efficiency. Results showed that EO pretreatment significantly reduced lag phase and improved methane production in high-volume LL anaerobic co-digestion reactors, validating the feasibility and cost-effectiveness of the method.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Jyoti K. Chetri, Krishna R. Reddy, Stefan J. Green
Summary: In recent years, biochar-amended soil cover has shown promise for enhancing microbial methane oxidation and reducing methane emissions. This study found that biochar infused with methane-oxidizing bacteria can reduce acclimation time and enhance methane oxidation activity. The addition of activated biochar to landfill cover soil resulted in higher methane oxidation rates and a shorter lag phase.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2022)
Article
Biotechnology & Applied Microbiology
Maria Jacome, Vincenzo Costanzo-Alvarez, Milagrosa Aldana, Pamela Patraskovic, Chris Drielsma, Daniela Galatro, Cristina Amon
Summary: This study introduced a non-invasive and cost-effective methodology to identify hydrogeological features in groundwater sources by combining DC resistivity and IP survey data. The results demonstrate the feasibility of using surface methane concentration data as a diagnostic test to characterize the areal extent of the leachate plume underground.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Carolina Parelho, Armindo Rodrigues, Maria do Carmo Barreto, J. Virgilio Cruz, Frank Rasche, Luis Silva, Patricia Garcia
Summary: The study revealed that the management practices of volcanic pasturelands significantly increased the soil contents of trace metals, leading to different elements being enriched based on the type of management. The soil physicochemical properties in the reseeded pastureland system modulated the metal bioavailability, affecting the accumulation of metals in biota.
Article
Plant Sciences
Konrad Egenolf, Supriya Verma, Jochen Schoene, Iris Klaiber, Jacobo Arango, Georg Cadisch, Gunter Neumann, Frank Rasche
Summary: The release of 3-epi-brachialactone by Brachiaria humidicola roots is influenced by rhizosphere pH and nutritional N form, with NH4+ promoting its exudation. The release is correlated with the transmembrane proton gradient and NH4+ uptake, suggesting a pathway through secondary transport rather than a direct response to soil pH or NH4+ availability.
PHYSIOLOGIA PLANTARUM
(2021)
Article
Biotechnology & Applied Microbiology
Andrea Watzinger, Melanie Hager, Thomas Reichenauer, Gerhard Soja, Paul Kinner
Summary: The study compared the biodegradation of hexadecane and decane in different filter materials (sand, sand amended with biochar, expanded clay) collected from constructed wetlands. It was found that mineralization rate of hexadecane was higher in sand filters, while adsorption/desorption of hydrocarbons was observed in expanded clay. Additionally, hydrogen isotope fractionation was rarely recorded in expanded clay and sand & biochar filters during decane biodegradation.
Article
Biochemical Research Methods
Andrea Watzinger, Katharina Schott, Rebecca Hood-Nowotny, Federica Tamburini, Laura Arppe, Domiziana Cristini, Kay Knoeller, Grzegorz Skrzypek
Summary: This study successfully calibrated a new silver phosphate (Ag3PO4) stable isotope comparison material, providing reliable support for stable oxygen isotope analysis. Consistent results from multiple laboratories suggest that the use of different instruments and the same normalization procedure can help reduce errors.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2021)
Article
Soil Science
A. Barreiro, A. Fox, M. Jongen, J. Melo, M. Musyoki, A. Vieira, J. Zimmermann, G. Carlsson, C. Cruz, A. Luscher, F. Rasche, L. Silva, F. Widmer, L. M. Dimitrova Martensson
Summary: This study, which investigates grassland soil microbial communities along a pan-European agro-ecological gradient, shows that environmental properties have the most significant impact on soil bacterial community structure, while soil fungal groups are more responsive to grassland management intensity.
APPLIED SOIL ECOLOGY
(2022)
Article
Soil Science
Isaac Balume, Birhanu Agumas, Mary Musyoki, Sven Marhan, Georg Cadisch, Frank Rasche
Summary: This study found that high decomposability organic residues applied to less acidic soils can promote proteolytic enzyme activities and affect the abundance of nitrifying bacteria populations. The positive relationship between proteolytic enzyme activities and the abundance of nitrifiers was more pronounced at later stages of the incubation period, indicating a potential niche specialization between ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) depending on soil acidity and resource availability.
APPLIED SOIL ECOLOGY
(2022)
Article
Soil Science
Konrad Egenolf, Philipp Schad, Ashly Arevalo, Daniel Villegas, Jacobo Arango, Hannes Karwat, Georg Cadisch, Frank Rasche
Summary: Brachiaria humidicola (syn. Urochloa humidicola) has been recognized for controlling soil nitrification through releasing nitrification inhibitors (NI), termed as biological nitrification inhibition (BNI), which can reduce net nitrification rates by 50 to 85%. Adjustment of soil pH and microbial background has little influence on BNI performance, while the decrease in net nitrification rates mainly depends on microbial N immobilization and efficient plant N uptake.
BIOLOGY AND FERTILITY OF SOILS
(2022)
Article
Environmental Sciences
Christoph Noller, Wolfgang Friesl-Hanl, Rebecca Hood-Nowotny, Markus Puschenreiter, Andrea Watzinger
Summary: The study found that ex situ EDTA washing significantly reduced the concentrations of heavy metals in soil and decreased plant uptake of Cd and Zn. The addition of zero-valent iron effectively reduced residual EDTA and increased Pb retention, while organic amendments had a minor impact on Pb behavior.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Soil Science
Wimon Phukongchai, Wanwipa Kaewpradit, Frank Rasche
Summary: The study found that inoculating cellulolytic and ligninolytic microbes in tropical sandy soils can enhance the decomposition of organic inputs with high C/N ratio and cellulose content, leading to increased soil organic carbon accumulation.
APPLIED SOIL ECOLOGY
(2022)
Article
Soil Science
V. Audu, F. Rasche, L. M. Dimitrova Martensson, C. Emmerling
Summary: Compared to organic rotation systems, perennial grain agroecosystems can increase soil organic matter and microbial activities. However, a more diverse perennial grain cultivation does not lead to higher microbial biomass and activities compared to monoculture.
APPLIED SOIL ECOLOGY
(2022)
Article
Plant Sciences
Williams Oyifioda Anteyi, Iris Klaiber, Frank Rasche
Summary: The study found that the Fusarium exometabolite DAS has strong herbicidal effects on S. hermonthica without affecting the growth of host crops. Incubating DAS in the soil can promote the growth of soil microbial community and degradation of DAS.
Article
Mycology
Evans Were, Jochen Schone, Altus Viljoen, Frank Rasche
Summary: This study reveals the potential mechanism of manipulating iron bioavailability in the banana rhizosphere to suppress Fusarium wilt. The results suggest that iron starvation induces the production of iron-scavenging secondary metabolites, called siderophores, by Foc TR4 as a counteractive mechanism to evade iron starvation.
Article
Agronomy
Evans Were, Jochen Schone, Altus Viljoen, Frank Rasche
Summary: This study found that phenolic acids excreted by the roots of Desmodium uncinatum and Mucuna pruriens can inhibit the development and toxin synthesis of the banana wilt pathogen Foc TR4, thereby suppressing the disease.
Correction
Soil Science
A. Watzinger, J. Prommer, A. Spiridon, W. Kisielinska, R. Hood-Nowotny, S. Leitner, W. Wanek, C. Resch, M. Heiling, E. Murer, H. Formayer, A. Wawra, J. Miloczki
BIOLOGY AND FERTILITY OF SOILS
(2023)
Article
Soil Science
A. Watzinger, J. Prommer, A. Spiridon, W. Kisielinska, R. Hood-Nowotny, S. Leitner, W. Wanek, C. Resch, M. Heilig, E. Murer, H. Formayer, A. Wawra, J. Miloczki
Summary: Climate change scenarios predict more frequent and intense drought periods for many regions of the world, including Austria. This study simulated lower precipitation scenarios at a lysimeter station with fertile and less fertile agricultural soil. The results showed that drought significantly reduced the abundance and biodiversity of oribatid mites, while microbial communities remained unchanged. Green manure decomposition was primarily influenced by plant residue availability rather than water limitation. N2O emissions decreased and N-15 from green manure accumulated in the soil under drought conditions.
BIOLOGY AND FERTILITY OF SOILS
(2023)
Article
Soil Science
C. Beraud, F. Piola, J. Gervaix, G. Meiffren, C. Creuze des Chatelliers, A. Delort, C. Boisselet, S. Poussineau, E. Lacroix, A. A. M. Cantarel
Summary: This study investigated the soil factors influencing the development of biological denitrification inhibition (BDI) and found that initial soil moisture, ammonium concentration, and the initial abundance of certain microbial genes play significant roles in BDI development. Additionally, the research highlighted the relevance of biotic factors in explaining BDI and proposed the use of procyanidin concentration from plant belowground system as a new proxy for measuring BDI intensity.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Yizhu Qiao, Tingting Wang, Qiwei Huang, Hanyue Guo, He Zhang, Qicheng Xu, Qirong Shen, Ning Ling
Summary: Soil microbial community coalescence, the mixing and interaction of microbial communities, has been found to enhance the stability and complexity of rhizobacterial networks, leading to improved plant health and biomass. This study investigated the effects of different degrees of bacterial community coalescence on plant disease resistance by mixing soils from healthy and diseased habitats for watermelon planting. The results showed that mixing in more healthy soil reduced the plant disease index and increased biomass by improving the stability and complexity of the rhizobacterial network. Core taxa Nitrospirillum and Singulisphaera were enriched in the rhizosphere from healthy soils and played important roles in disease suppression and regulating the positive cohesion and modularity of the networks. Overall, these findings provide insights into the potential mechanism of microbial community coalescence for improving plant microbial community function and suggest new tools for enhancing plant fitness via soil microbiota mixing.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Mengqiu He, Shending Chen, Lei Meng, Xiaoqian Dan, Wenjie Wang, Qinying Zhu, Zucong Cai, Jinbo Zhang, Pierfrancesco Nardi, Christoph Mueller
Summary: Maize genotypes directly affect gene expression and nitrogen uptake capacity. The feedback between maize genotypes and soil nitrogen transformations, as well as their regulations on nitrogen uptake capacity, have been studied. The findings suggest that maize genotypes play a central role in regulating these feedbacks, which are important for maize breeding and enhancing maize production.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Ke Shi, Jiahui Liao, Xiaoming Zou, Han Y. H. Chen, Manuel Delgado-Baquerizo, Zhengming Yan, Tingting Ren, Honghua Ruan
Summary: Through rewilding, microbial extracellular and cellular residues can continuously accumulate in soils and significantly contribute to soil organic carbon sequestration. Extracellular residues are mainly driven by fine root biomass, while cellular residues are mainly driven by soil nitrogen and organic carbon content.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Sensen Chen, Ying Teng, Yongming Luo, Eiko Kuramae, Wenjie Ren
Summary: This study comprehensively assesses the effects of NMs on the soil microbiome through a global meta-analysis. The results reveal significant negative impacts of NMs on soil microbial diversity, biomass, activity, and function. Metal NMs, especially Ag NMs, have the most pronounced negative effects on various soil microbial community metrics.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Shareen K. D. Sanders, Gerard Martinez-De Leon, Ludovico Formenti, Madhav P. Thakur
Summary: Collembolans, the diverse group of soil invertebrates, are affected by anthropogenic climate warming, which alters their diversity and density. In addition to abiotic stressors, changes in food availability, specifically the abundance of saprotrophic and mycorrhizal fungi, influence Collembola responses to climate warming. Collembolans prefer saprotrophic fungi but rely on mycorrhizal fungi when food sources are scarce. Understanding the mechanisms behind these dietary shifts in warm-dry and warm-wet soil conditions is crucial for predicting the impact of climate change on Collembola-fungal interactions.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Wimonsiri Pingthaisong, Sergey Blagodatsky, Patma Vityakon, Georg Cadisch
Summary: A study found that mixing high-C/N ratio rice straw with low-C/N ratio groundnut stover can improve the chemical composition of the input, stimulate microbial growth, decrease the loss of residue-derived carbon in the soil, and reduce native soil carbon and nitrogen consumption.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Jiachen Wang, Jie Zhao, Rong Yang, Xin Liu, Xuyuan Zhang, Wei Zhang, Xiaoyong Chen, Wende Yan, Kelin Wang
Summary: Nitrogen is vital for ecosystem productivity, restoration, and succession processes. This study found that legume intercropping was more effective than chemical nitrogen fertilizers in promoting the complexity and stability of the soil micro-food web, as it increased microbial and nematode communities and enhanced energy flow patterns.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
