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From Biofiltration to Promising Options in Gaseous Fluxes Biotreatment: Recent Developments, New Trends, Advances, and Opportunities provides an overview on the biological tools used for the treatment of the gaseous fluxes, with emphasis on traditional and perspective options, opening new horizons for research and implementation in practice. It is known that air pollution is an emergent global issue and a priority within the international environmental programs. Moreover, technologies based on biological methods are significantly contributing to the sustainable development concept. Thus this book provides tools for solving air pollution issues in a sustainable manner. These issues can be solved at different levels (e.g., "end-of-pipe" gaseous streams, indoor/outdoor air, closed environments), which can be approached by the different biotechniques presented in the book, from classical biofiltration techniques (part 1) to phytotreatment and microalgae-based techniques (part 2). Although all options have their particularities that make them special for certain applications, a special attention is drawn to the potential of the last one, which offers multiple possibilities for biomass valorization. Scientists from worldwide with relevant experience in their field have been contributed to the development of this book. Presents the main biotechnological aspects applied for gas purification, focusing on process understanding, limitations, and capability in different applications Promotes a sustainable future of the biofiltration process by enhancing their performance together with the simultaneously economic and environmental impacts Implements new aspects of scientific research and development in the field
The number-one environmental threat to public health, air pollution remains a pressing problem-made even more complicated by the massive quantity and diversity of air pollution sources. Biofiltration technology (using micro-organisms growing on porous media) is being recognized as one of the most advantageous means to convert pollutants to harmless products. Done properly, biofiltration works at a reasonable cost-utilizing inexpensive components, without requiring fuel or generating hazardous by-products. Firmly established in Europe, biofiltration techniques are being increasingly applied in North America: Biofiltration for Air Pollution Control offers the necessary knowledge to "do it right."
Master's Thesis from the year 2012 in the subject Chemistry - Bio-chemistry, , course: Master Degree, language: English, abstract: Modern air pollution control technologies have emerged over the past 40 years to mitigate emission problems in industrial facilities and thereby comply with environmental regulations. A variety of technologies have been developed to meet the needs of both the industries and the regulatory agencies keeping in view the techno economics. Some air pollutants like H2S, NH3 and VOC’s are emitted in the industry causes odour and this not only causes occupational health but also damages public image of the company. Engineered biofiltration is a sustainable technology for VOC and odor control. Bio-filtration is a method of pollution control in which pollutants are biologically degraded using microorganisms. Generally, the energy demands for biofiltration are one-fourth to one-tenth that of physico-chemical destructive technologies. Biofilters are being developed and effectively used for a wide variety of industries, including wood products, paint manufacturing, petroleum remediation etc. Biofilters are cost-effective and straightforward options for pollutants capable of biodegrading reasonably easily. Triethylamine(TEA) is a Volatile organic compound widely used as a catalyst for polymerization reactions and a solvent and corrosion inhibitor in industry and it is also used as an intermediate in the production of various chemicals, including pesticides. It is necessary to remove TEA from water and gas in the environment. TEA gas-phase bio treatment has emerged as an effective and inexpensive alternative to conventional physicochemical treatment systems. The technology is still under development in terms of economics, equipment, process kinetics, and operational skills and different layouts and flow trains are being proposed including biofiltration, biotrickling filter, and bioscrubber. In the present work, studies are being carried out on biofilter contaminated with TEA. The contaminated gas is passed through a packed bed where TEA compound is absorbed into the biofilm in which diffusion and aerobic biodegradation occur simultaneously in a complex set of physical, chemical and biological interactions. Therefore, selection of suitable microbial consortia and biofilter configuration is very important from commercial perspective.
Major technical challenges confronting biofiltration technology are: effective support media for biotrickling filters, understanding of biofiltration of mixed contaminants, biofiltration of contaminants at very low concentration, and biofilm model calculation for concentration distribution within a biofilm. In this research work, a composite media was designed and tested in bench scale biotrickling filters. The media were made of a polymeric support media coated with either activated carbon or sand. The resulted media will inherit properties such as high void fraction, high interfacial area, and low bulk density from the original packing, plus enhanced surface suitable for biofilm attachment and growth. The new media were evaluated along with the original media in bench scale biotrickling filters. A fibrous packing medium was evaluated in the biofiltration of ethanol in biotrickling filters and microbiofilters. The microbiofilter system, operating according to a new experimental protocol, can be used to determine both reaction rate constants and mass transfer coefficient with the help of a concise mathematical model. The identified parameters are then used to calculate concentration profiles inside a biotrickling filter and to predict its biofiltration performance. This fibrous packing medium was later used in a pilot scale biotrickling filter test to treat ethanol emission found in exhaust gases from baking ovens. The same fibrous media as well as the experimental protocol were also used in studying mixed contaminants biofiltration. Biofiltration of mixed contaminants was studied using target compounds of alcohols, acetone, acetaldehyde in biotrickling filters and microbiofilters using the fibrous medium. In a batch system, the preference of individual contaminant by the biomass can be carefully examined. Meanwhile, their respective biodegradation kinetics can be investigated by employing a mathematical model, which was also developed to portray the biofiltration process of mixed contaminants in microbiofilters. A unique convective flow biofilter, for the biotreatment of waste gas with low concentration organic contaminants, was invented and tested successfully in laboratory. Current biofilters employ diffusion mechanism for transport of contaminant to the active cells in the biofilm. The biofiltration effectiveness decreases with contaminant concentration at low contaminant concentration. A convective flow biofilter employs a convective biofilm in which the contaminated air flows through the active biofilm, rather than flow over it. The efficiency of convective transport of contaminants is not affected by contaminant concentration, and hence convective biofilters are expected to be much better than diffusive biofilters at low contaminant concentration. The concept of convective biofilm was implemented using a channellized monolith. Experiments were conducted to compare both diffusive and convective biofilters in the biofiltration of toluene for 3 months. Biofiltration performances were evaluated at various flow rate and inlet concentrations. Mathematical models for both diffusive and convective biofilters were developed to simulate experimental results. Simple and effective methods were proposed to calculate substrate flux into the biomass and to estimate contaminant concentration distribution within an active biofilm. Results estimated using these methods were compared with numerical solution data and therefore these methods were verified in term of error and accuracy.
Many physico-chemical and operational factors influence the performance, treatment costs and long-term stability of biofilters for the treatment of wastewater. An Innovative Role of Biofiltration in Wastewater Treatment Plants focuses on identifying the factors that affect biofiltration, such as the hydraulic retention time of the biofiltration system, the type and characteristics of the filter and the attached biomass, explains their influence and provides guidelines on how to control these factors to optimize better operation with respect to pollutant control present in wastewater treatment plants (WWTPs). The fundamental basis of treatment in biofilters is the action of pollutant-degrading microorganisms and consequently the book also discusses in depth about the microbial ecology of biofiltration. In addition, it explores the applications of biofiltration including the removal of emerging pollutants. Describes the microbial ecology of biofiltration Includes modeling of biofiltration Describes the designing of biofilters, start-up, and monitoring Discusses the mechanism of biofiltration Describes the controlling and operational factors of biofiltration
The ever-increasing number of pollutants discharged into the environment drives the search for new treatment technologies or the modification of the existing ones. In this sense, innovation in bio-nano filtration systems seems very promising and, therefore, a book on the current advances and innovations on this topic is highly appropriate. Bio-nano filtration is a relatively new emerging technology applied to the treatment of wastewater and other toxic compounds. In the last two decades, this technology has begun to emerge as an economically viable process to treat the great variety of recalcitrant pollutants discharged into the environment. Thus, it is speculated that the US biofiltration market will reach over $100 million by 2020. This book aims to present how innovation in bio-nano filtration can provide effective solutions to overcome the serious problem of water pollution worldwide. The removal of contaminants will be the result of the combined effects of biological oxidation, adsorption, and filtration processes. Features: Describes the microbial ecology of bio-nano filtration. Describes the modelling of bio-nano filtration. Describes the design of bio-nanofillers.
Advances and Technology Development in Greenhouse Gases: Emission, Capture and Conversion is a comprehensive seven-volume set of books that discusses the composition and properties of greenhouse gases, and introduces different sources of greenhouse gases emission and the relation between greenhouse gases and global warming. The comprehensive and detailed presentation of common technologies as well as novel research related to all aspects of greenhouse gases makes this work an indispensable encyclopedic resource for researchers in academia and industry.Volume 4 titled Carbon Capture Technologies is devoted to efficient technologies utilized for separation that are the heart of controlling carbon-made greenhouse gases (GHGs). The book starts with a review of carbon capture concepts with a focus on energy penalties as well as the operating pilots and plants followed by a meticulous investigation of different classes of capture methods. Section 2 surveys the absorption process including amines, physical absorbents, alkaline solvents, ionic liquids and deep eutectic solvents, nanoparticle-enhanced solvents, as well as a number of novel materials and structures, that are employed to eliminate GHGs utilizing absorption. Section 3 addresses adsorption-based strategies with a focus on the role of different solid adsorbents, introduces technologies that benefit from membranes, and considers different materials utilized in the fabrication of membranes. The final section deals with other as state-of-the-art alternatives in carbon capture. Moreover, each section reviews the economic assessments and environmental challenges. Introduces carbon capture concepts and challenges Describes various absorption and adsorption processes for carbon capture Includes various membrane technologies for carbon capture
Emerging Technologies and Biological Systems for Biogas Upgrading systematically summarizes the fundamental principles and the state-of-the-art of biogas cleaning and upgrading technologies, with special emphasis on biological processes for carbon dioxide (CO2), hydrogen sulfide (H2S), siloxane, and hydrocarbon removal. After analyzing the global scenario of biogas production, upgrading and utilization, this book discusses the integration of methanation processes to power-to-gas systems for methane (CH4) production and physiochemical upgrading technologies, such as chemical absorption, water scrubbing, pressure swing adsorption and the use of membranes. It then explores more recent and sustainable upgrading technologies, such as photosynthetic processes using algae, hydrogen-mediated microbial techniques, electrochemical, bioelectrochemical, and cryogenic approaches. H2S removal with biofilters is also covered, as well as removal of siloxanes through polymerization, peroxidation, biological degradation and gas-liquid absorption. The authors also thoroughly consider issues of mass transfer limitation in biomethanation from waste gas, biogas upgrading and life cycle assessment of upgrading technologies, techno-economic aspects, challenges for upscaling, and future trends. Providing specific information on biogas upgrading technology, and focusing on the most recent developments, Emerging Technologies and Biological Systems for Biogas Upgrading is a unique resource for researchers, engineers, and graduate students in the field of biogas production and utilization, including waste-to-energy and power-to-gas. It is also useful for entrepreneurs, consultants, and decision-makers in governmental agencies in the fields of sustainable energy, environmental protection, greenhouse gas emissions and climate change, and strategic planning. Explores all major technologies for biogas upgrading through physiochemical, biological, and electrochemical processes Discusses CO2, H2S, and siloxane removal techniques Provides a systematical approach to discuss technologies, including challenges to gas–liquid mass transfer, life cycle assessment, technoeconomic implications, upscaling and systems integration
This book “Microbial Products for Future Industrialization” focuses on the exploitation of various advanced microbial and molecular biology technologies and their associated processes, especially the microbial-molecular-chemical nexus, for the future industrialization of emerging new microbial products. The descriptions given in its chapters take the reader through an entire journey of new emerging microbial products from lab to industry and provide new information that has not yet been fully exploited for future industrialization steps. This volume is a great resource for readers seeking a more comprehensive material covering the technical, economic, and societal aspects that impact bioprocessing of microbial products at the industrial level along with biotechnological intervention for better production of microbial products in near future. This book also encompasses advanced and updated information as well as future directions for young researchers and scientists, and academics who are working in the field of microbial product production related to sustainability.
Intensive use of fossil-based energy sources causes significant environmental problems on a global scale. Researchers have been working for several decades to find alternative energy solutions to fossil fuels. Algae are a renewable energy source, with high potential for increasing scarce resources and reducing environmental problems caused by fossil fuel use. Algal Biotechnology for Fuel Applications gives the reader a comprehensive picture of the industrial use of algae for generating power. This book informs readers about the existence of alternative species to the currently used algae species for biofuel production, while also explaining the methods and current concepts in sustainable biofuel production. Key Features - Fifteen chapters covering topics on commercial algae species and algal biofuel production. - Covers anaerobic biotechnology and basic biofuel production from thermal liquefaction - Covers biodiesel production and algal biofuel characterization - Introduces the reader to applied microbial fuel cell technology and algae cultivation methods - Provides concepts about ecological engineering - Covers microalgae culture and biofuel production techniques - Explains the importance of catalysts - Explains the economic evaluation of algae fuel production technology This reference is essential reading for students and academics involved in environmental science, biotechnology, chemical engineering and sustainability education programs. It also serves as a reference for general readers who want to understand the ins and outs of algal biofuel technology.