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Bioaugmentation Techniques for Removal of Heterocyclic Compounds and Polycyclic Aromatic Hydrocarbons
Published in Inamuddin, Charles Oluwaseun Adetunji, Mohd Imran Ahamed, Tariq Altalhi, Bioaugmentation Techniques and Applications in Remediation, 2022
Ulrich Vasconcelos, Luiz Gustavo Pragana, Eduardo Santos da Silva
Bioremediation is a sustainable, eco-friendly, attractive, and low-cost technique to recover a contaminated site, speeding up the process of mineralization of organic compounds, in less time than the natural attenuation process (Atlas, 1981). When microbes, for example, bacteria and fungi, are employed in bioremediation, the removal of the contaminant is based on stimulating the microbiota’s metabolic activity, which converts the contaminant into biomass and metabolites (Abatenh et al., 2017). The use of bioaugmentation as a mineralization strategy for recalcitrant hydrocarbons is based on two basic principles: (i) when the microbial density present is not sufficient to maintain degradation efficiently, requiring the addition of competent cells (Jacques et al., 2007), and (ii) when the C:N:P ratio is unbalanced, failing to stimulate the microbiota by adding nutrients and cosubstrates (Mehrzad et al., 2015).
Assessment of Some Hazards Associated with Dangerous Chemicals
Published in Rouf Ahmad Bhat, Moonisa Aslam Dervash, Khalid Rehman Hakeem, Khalid Zaffar Masoodi, Environmental Biotechnology, 2022
Natural attenuation or intrinsic remediation is the simplest form of bioremediation, which requires no intervention other than to demonstrate that indigenous populations exist and can have action to degrade the pollutants and monitor the degradation process.
Bioremediation of Potentially Toxic Metals by Microorganisms and Biomolecules
Published in Ram Naresh Bharagava, Sandhya Mishra, Ganesh Dattatraya Saratale, Rijuta Ganesh Saratale, Luiz Fernando Romanholo Ferreira, Bioremediation, 2022
Luciana Maria Saran, Bárbara Bonfá Buzzo, Cinara Ramos Sales, Lucia Maria Carareto Alves, Renan Lieto Alves Ribeiro
Bioaugmentation is one of the bioremediation techniques that are based on the inoculation of microorganisms in environments that are to be remedied, and these environments include water, soils, sediments and silt. These microorganisms have previously been identified and characterized, and they must possess the desired catalytic functions for the inactivation of the target contaminant (Cycoń et al. 2017). The bioaugmentation process is briefly illustrated in Figure 6.6, and this process is performed primarily in environments contaminated with oil (Goswami et al. 2018).
Soil and groundwater remediation proposal for hydrocarbons in a tropical aquifer
Published in Journal of Applied Water Engineering and Research, 2023
Adriana Márquez, Estafania Freytez, Julio Maldonado, Edilberto Guevara, Sergio Pérez, Eduardo Buroz
The remediation of soil and groundwater pollutants, whether by physical, chemical, biological (bioremediation) means or any combination thereof, are the only options to eliminate them. In particular, bioremediation involves the use of microorganisms to degrade hazardous organic constituents to harmless substances, such as carbon dioxide and water (Wilson and Jones 1993). The bioremediation can be carried out ex-situ or in-situ, depending on several factors including, but not limited to, cost, site characteristics, type and concentration of pollutants (Azubuike et al. 2016). Ex-situ and in-situ techniques offer specific benefits and costs. Despite the high cost, ex-situ treatment usually demands less time to reach efficient contaminant cleanup, is easily controlled, and achieves greater uniformity (Kuppusamy et al. 2016).
The Effect of Soil Particle Sizes on Bioremediation Efficiency of Petroleum Contaminated Soils
Published in Soil and Sediment Contamination: An International Journal, 2023
Emmanuel Emeka Arinze, Benjamin Nnamdi Ekwueme, Anthony Chibuzo Ekeleme
Microorganisms must be active and healthy for bioremediation to occur. Bioremediation technologies assist microorganisms’ growth and increase microbial populations by creating enabling environmental conditions for them to detoxify optimally. The specific bioremediation technology needed is determined by several factors such as the type of microorganisms present, the site conditions, the quantity and toxicity of contaminant chemicals, and probably the soil type. Different microorganisms suit different types of compounds and survive under hydrocarbon, different environmental conditions and temperatures. Bioremediation can occur under aerobic and anaerobic conditions. In aerobic conditions, microorganisms use available atmospheric oxygen to function (Gomez and Sartaj 2014; Jain et al. 2011; Khayati and Barati 2017; Shahi et al. 2016; Varjani and Upasani 2017; Yuniati 2018; Zhao, Scheibe, and Mahadevan 2011).
Applications of bioremediation and phytoremediation in contaminated soils and waters: CREST publications during 2018–2022
Published in Critical Reviews in Environmental Science and Technology, 2023
Chen-Jing Liu, Song-Ge Deng, Chun-Yan Hu, Peng Gao, Eakalak Khan, Chang-Ping Yu, Lena Q. Ma
Plastics are synthetic organic polymers with high-persistence and low-degradability. Nonetheless, several organisms have been used in plastic biodegradation, including bacteria Pseudomonas aeruginosa and Streptomyces badius, and fungi Aspergillus niger and Aspergillus flavus (Paço et al., 2019). Bioaugmentation is often used in bioremediation, which refers to the application of exogenous microbes with specific catabolic activities to contaminated sites. Coupled these functional microbes with chemical/physical pretreatments, these plastic wastes may be reduced and removed from the environment. Besides, plastic contaminants may be often associated with some organic additives, with bisphenol-S contamination having received increasing attention. Fang et al. (2020) summarized some active species for bisphenol-S biodegradation and the associated degradation pathways. As the first reported strain, Phingobium fuliginis OMI is capable of complete aerobic degradation of bisphenol-S. The strain was isolated from the rhizosphere of aquatic plants, which can degrade bisphenol-S within 24 h via phenolic ring hydroxylation followed by a meta-cleavage pathway (Fang et al., 2020).