Article
Environmental Sciences
Patricia K. Akao, Aviv Kaplan, Dror Avisar, Amit Dhir, Adi Avni, Hadas Mamane
Summary: This study evaluated the removal capacity of a coupled microalgal-bacterial biofilm (CMBB) for three recalcitrant pharmaceuticals. The results showed that CMBB treatment had a higher removal efficiency for venlafaxine and carbamazepine, but no removal was observed for iohexol. The presence of light, microorganism composition, and dissolved oxygen concentration were identified as essential parameters affecting pharmaceutical and ammonia removal. CMBB has the potential to be a cost-effective and sustainable method for wastewater treatment and removal of recalcitrant pharmaceuticals.
Review
Chemistry, Inorganic & Nuclear
Doaa Zamel, Atta Ullah Khan
Summary: Cellulose acetate is a versatile substance with wide applications and unique characteristics, making it suitable for electrospinning and nanofibers preparation. Immobilization of bacteria enhances their efficiency in wastewater treatment and pollution removal, offering a solution to reduce pollution.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Environmental Sciences
Gloria Andrea Silva-Castro, Alfonso Rodriguez-Calvo, Tatiana Robledo-Mahon, Elisabet Aranda, Jesus Gonzalez-Lopez, Concepcion Calvo
Summary: This study focuses on the development and design of a treatment system at a pilot-plant scale for the remediation of hydrocarbons in industrial wastewater. By combining absorption and biodegradation methods, the system can effectively treat wastewater with high and low pollutant loads. Testing different flow rates and aeration conditions revealed optimal operation methods for different pollutant loads.
Article
Biotechnology & Applied Microbiology
Tahseen Sayara, Saed Khayat, Jebreel Saleh, Nawaf Abu-Khalaf, Peter van der Steen
Summary: The research investigated the application of algal-bacterial symbiotic interaction as a low-cost and environment-friendly alternative for wastewater treatment using a photobioreactor working under sequencing batch mode. The study showed a synergistic interaction between algal and bacterial cultures which enhanced the removal of pollutants, with a high positive correlation between DO and NO3- and a high negative correlation between DO and COD observed through multivariate data analysis. The results hold promise for future process development and reducing greenhouse gas emissions.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Review
Environmental Sciences
Jing-Tian Zhang, Jian-Xia Wang, Yang Liu, Ying Zhang, Jing-Han Wang, Zhan-You Chi, Fan-Tao Kong
Summary: Microalgal-bacterial biofilms have great potential in wastewater treatment, but their advantages and limitations vary among different types of biofilms. This study classified the biofilms into different categories and identified their characteristics and limitations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Agricultural Engineering
Rui Wang, Qiang Xu, Chunlei Chen, Xinkai Li, Chunfang Zhang, Dongdong Zhang
Summary: Fixed-bed baffled reactors packed with various materials were developed for microbial nitrification-denitrification reactions in aquaculture wastewater treatment. Among them, the carbon fiber (CFBR) showed the best performance, enriching nitrifying and denitrifying bacteria efficiently and demonstrating potential synergistic interactions. This study provides insights into the influence of different carrier materials on biofilm formation and highlights the potential applications of CFBR in aquaculture wastewater treatment.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Wei Zhang, Yang Wu, Jing Wu, Xiong Zheng, Yinguang Chen
Summary: This study demonstrates the feasibility of utilizing membrane aerated biofilm reactor (MABR) for the removal of sulfur-containing organic pollutants in wastewater. The system showed a high removal efficiency of approximately 100% and transformed over 70% of the pollutants into less harmful forms. The study also identified the key metabolic pathways and corresponding gene expressions that were up-regulated during the process, which greatly facilitated the transformation of sulfur-containing organic pollutants.
ENVIRONMENTAL POLLUTION
(2022)
Article
Green & Sustainable Science & Technology
Yuming Zhong, Hui Liu, Huankai Li, Qian Lu, Yan Sun
Summary: This study focuses on the interactive network analysis between algae and wastewater-borne bacteria to identify beneficial bacteria and assess the impact of glycerol on a beneficial bacterial strain. Results showed that co-cultivating microalgae and Pseudomonas dramatically enhanced biomass yield and nutrients removal efficiencies, but the addition of glycerol led to the collapse of the algal-bacterial consortia in the late stage of co-cultivation, reducing treatment efficiency and biomass. It is suggested that non-fermentative bacteria as main probiotics in algal-based wastewater remediation should be used to provide small-molecule-weight organics as carbon sources.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Jianwei Li, Ruitao Gao, Qiyu Liu, Qiong Zhang, Xiyao Li, Liang Zhang, Junfei Qiao, Yongzhen Peng
Summary: The main challenge in municipal wastewater treatment using partial-denitrification/anammox (PD/A) in the anoxic zone is the effective enrichment of anaerobic ammonium oxidation (anammox) bacteria. This long-term study achieved a total inorganic nitrogen concentration of 11.2 ± 3.5 mg N/L in the effluent of a pure-biofilm anoxic/oxic reactor using real municipal wastewater, resulting in a removal efficiency of 77.4 ± 7.2%. The anammox contribution to total nitrogen removal was over 55%, and Candidatus Brocadia was the only anammox genus detected. The study highlights the robust enrichment of anammox bacteria using a pure-biofilm system, providing insight into the application of mainstream anammox in municipal wastewater treatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Dimitra Das, Bikram Kumar Das, Ratna Sarkar, Somnath Mukherjee, Kalyan Kumar Chattopadhyay
Summary: This study focuses on the synthesis of thermally modified graphitic carbon nitride (GCN) and its application in the photocatalytic reduction of toxic pollutants. The characterisations of the synthesised material helped to understand its structure, composition, and morphology. The GCN catalyst showed impressive stability and reusability, and statistical evaluation and first-principles calculations were conducted to further investigate its catalytic activity and reduction mechanisms.
ENVIRONMENTAL RESEARCH
(2023)
Article
Limnology
Melissa L. Brock, Alyse A. Larkin, Eric J. Raes, Adam C. Martiny
Summary: This study provides a comprehensive understanding of bacterial ecology in the Indian Ocean, revealing 23 distinct bioregions and the relationship between bacterial community structure and oceanic physical and geochemical gradients.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Engineering, Environmental
Kai Lv, Dangcong Peng, Yun Han, Lifang Yu
Summary: Enrichment and accumulation of anammox bacteria in aerobic biofilm is crucial for successful nitrogen removal in municipal wastewater treatment plants. This study detected a relatively high percentage of anammox bacteria in the biofilm of two WWTPs in Xi'an, China, and estimated their contribution to nitrogen removal. These findings suggest that aerobic biofilm could enhance nitrogen removal in mainstream.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Songming Zhu, Leping Zhang, Zhangying Ye, Jian Zhao, Gang Liu
Summary: This study used poly(3-hydroxybutyrate-co-3-hydroxyvalerate) as a carbon source to investigate denitrification processes in two reactors with different salinities. The denitrification rate reached maximum values in both reactors, indicating efficient denitrification. The microbial diversity and dominant bacterial classes differed between the two reactors. Additionally, the bacterial co-occurrence network and gene expression analysis provided insights into the performance and niche differences between fresh and seawater environments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Environmental Sciences
Xiaoyan Wang, Yu Hong
Summary: This paper reviews the knowledge of microalgae biofilm combined with bacteria to treat wastewater and provides insights into the bioremediation of the ecosystem by algae and bacteria.
CURRENT POLLUTION REPORTS
(2022)
Article
Engineering, Chemical
Li Lin, Yan Zhang, Bangguo Fu, Wenxin Yan, Qiang Fu, Shuang Li
Summary: This study evaluates the effects of different dosing strategies of powdered activated carbons (PACs) on the fouling of gravity-driven membrane (GDM) system during wastewater filtration. The results show that PAC dosing strategies have conflicting influences on membrane flux and pollutant removal, and the physical structures of biofilms and spatial distributions of organics and microorganisms explain this phenomenon.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Edit Kaszab, Julia Rado, Balazs Kriszt, Judit Paszti, Virag Lesinszki, Adam Szabo, Gergo Toth, Ariane Khaledi, Sandor Szoboszlay
Summary: Pseudomonas aeruginosa is a major public health concern worldwide, with environmental isolates showing high virulence in a Galleria mellonella model and a positive correlation between twitching and mortality. Resistance to antibiotics like Imipenem may lead to lower virulence in this model. The study highlights industrial wastewater, composts, and hydrocarbon-contaminated sites as hot spots for high-risk clones of P. aeruginosa.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH
(2021)
Article
Microbiology
Jafar Al-Omari, Istvan Szabo, Gabor Soma Szerdahelyi, Julia Rado, Edit Kaszab, Jeffrey Griffitts, Andras Tancsics, Sandor Szoboszlay
Summary: A novel bacterium designated as ZS-1/3T, affiliated with the genus Parvularcula and named Parvularcula mediterranea, was isolated from a plastic litter sample in Greece. It shows optimal growth at pH 7.0 and 28℃, with unique fatty acids and respiratory quinone composition.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2021)
Article
Engineering, Environmental
Gabor Bordos, Szilveszter Gergely, Judit Hahn, Zoltan Palotai, Eva Szabo, Gabriella Besenyo, Andras Salgo, Peter Harkai, Balazs Kriszt, Sandor Szoboszlay
Summary: The current research results on microplastics in the environment are uncertain due to inappropriate sampling, detection, and quantification methods. Surface sampling is more efficient than sampling in deeper layers of the water column, and using environmentally relevant reference particles can yield recovery rates closer to real environmental concentrations.
Article
Biotechnology & Applied Microbiology
Tibor Benedek, Flora Szentgyorgyi, Veronika Gergocs, Ofir Menashe, Perla Abigail Figueroa Gonzalez, Alexander J. Probst, Balazs Kriszt, Andras Tancsics
Summary: This study reports the applicability of Variovorax paradoxus strain BFB1_13 in the bioremediation of BTEX contaminated sites and found that it shows efficient biodegradation capabilities, especially towards benzene. Degradation pathways for BTEX were predicted based on gene annotation and metabolic analysis.
Article
Environmental Sciences
Sinchan Banerjee, Anna Bedics, Peter Harkai, Balazs Kriszt, Nagaraju Alpula, Andras Tancsics
Summary: This study investigated the microbial community diversity and degradation abilities of xylene isomers in a legacy BTEX-contaminated site. The results showed that different bacterial groups were involved in the degradation of different xylene isomers, and the composition of the bacterial community was distinct for each isomer. Two Hydrogenophaga strains were identified as effective degraders of p-xylene, and comparative whole-genome analysis revealed the genomic adaptations that contribute to their different xylene isomer-degrading abilities.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Biotechnology & Applied Microbiology
Edit Kaszab, Milan Farkas, Julia Rado, Adrienn Micsinai, Brigitta Nyiro-Fekete, Istvan Szabo, Balazs Kriszt, Bela Urbanyi, Sandor Szoboszlay
Summary: This study aimed to identify key members of bacterial communities on common carp fillets during chilled storage using NGS and cultivation-dependent methods. The study found that vacuum packaging and temperature significantly impacted the formation of microbial communities, with NGS revealing different microbial members compared to traditional cultivation methods.
FOLIA MICROBIOLOGICA
(2022)
Article
Microbiology
Anna Bedics, Sinchan Banerjee, Karoly Boka, Erika Toth, Tibor Benedek, Balazs Kriszt, Andras Tancsics
Summary: Two Gram-reaction-negative strains, B13(T) and MA2-2, were isolated from aromatic hydrocarbon-degrading enrichment cultures and identified as a novel species of the genus Pinisolibacter, named Pinisolibacter aquiterrae sp. nov., based on their 16S rRNA gene sequences and phenotypic characteristics.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2022)
Article
Environmental Sciences
Istvan Szabo, Jafar Al-Omari, Gabor Soma Szerdahelyi, Milan Farkas, Yazid Al-Omari, Peter Marton Szabo, Rozsa Sebok, Jeffrey Griffitts, Balazs Kriszt, Sandor Szoboszlay
Summary: Plastic waste is a major environmental concern due to the increase in production and use of plastics. Research on freshwater plastics revealed significant differences in bacterial communities compared to other materials and waterborne microbial communities. The use of a self-designed plastic colonizer proved successful in studying microplastic-associated microbes in varied environmental conditions over an extended period of time.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Biotechnology & Applied Microbiology
Flora Szentgyorgyi, Tibor Benedek, Dzsenifer Fekete, Andras Tancsics, Peter Harkai, Balazs Kriszt
Summary: In this study, a novel bacterial consortium consisting of Variovorax paradoxus and Pseudomonas veronii isolates was developed for the efficient biodegradation of BTEX compounds. The consortium showed promising results in both laboratory and field conditions, indicating its potential as a bioremediation agent.
Article
Environmental Sciences
Gergo Toth, Judit Hahn, Sandor Szoboszlay, Peter Harkai, Milan Farkas, Julia Rado, Balazs Gobolos, Edit Kaszab, Istvan Szabo, Bela Urbanyi, Balazs Kriszt
Summary: The present study provides a comprehensive understanding of the presence and environmental risks of pesticide and repellent residues in Lake Balaton and its sub-catchment area. The analysis identified multiple pesticides and repellents, with some exhibiting high environmental risks. The study highlights the need to consider expanding the analysis of pesticides and strengthening management and regulatory procedures.
ENVIRONMENTAL SCIENCES EUROPE
(2022)
Article
Environmental Sciences
Milan Farkas, Sandor Szoboszlay, Lajos Voros, Zsofia Lovasz, Nikoletta Mehes, Kalman Matyas, Rozsa Sebok, Edit Kaszab, Judit Hahn, Gergo Toth, Peter Harkai, Arpad Ferincz, Andras Tancsics, Balazs Kriszt
Summary: Lake Balaton, the largest shallow lake in Central Europe, has successfully reversed eutrophication processes with the help of wetland areas. Floods and external nutrient load affect the composition of microbial communities, while decomposition of algae biomass in plant-covered areas has a significant impact on bacterial communities.
Article
Engineering, Environmental
Andras Tancsics, Sinchan Banerjee, Andre Soares, Anna Bedics, Balazs Kriszt
Summary: Xylenes, particularly the ortho and para isomers, are known to be the least biodegradable among monoaromatic hydrocarbons in oxygen-limited subsurface environments. However, little is known about the diversity of bacteria capable of degrading xylene isomers under microaerobic conditions. To address this, aerobic and microaerobic xylene-degrading enrichment cultures were established, and the associated bacterial communities were analyzed. The results showed significant differences in the composition of the bacterial communities between aerobic and microaerobic conditions, with the genus Pseudomonas being dominant in both, but Rhodoferax and Azovibrio lineages only abundant under microaerobic conditions, while Sphingobium completely replaced them under aerobic conditions. The study also identified specific enzymes and their types that play a role in xylene degradation under different oxygen conditions, revealing the importance of aromatic ring activation, types of dioxygenases, and the ability to respire nitrate for xylene degraders.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)