3099067 In treatment using trickling filters, wastes are allowed to trickle through a bed of rocks coated with micro-organisms that alter the waste components by using them as food. By continuing you agree to the use of cookies. By Bienvenu Magloire Takem Mbi and Aloysious Kohtem Lebga. %
9. The selection of the most effective technology depends upon the wastes being treated.
AB - Biological treatment of hazardous waste (BTHW) involves natural and/or engineered biological systems with living organisms for treatment of hazardous waste. <>>>
Aspergillus nigeris a heterotrophic fungus reported in bioleaching processes mediated by organics acids as oxalic acid, reaching recovery percentages of 62.8% of Ni when was used spent catalyst at a concentration of 1% (w/v) [39]. The chapter discusses advances and trends in treatment technologies for BTHW (e.g., "Re-NEW-able" wastewater, solid/hazardous waste management, biosimulation, and bio-augmentation). The ability of Bacillus megateriumMNSH1-9K-1 and Bacillus subtilisPRGSd-9K-4 for the removal of Ni and V was evaluated by using a mineral medium plus a spent catalyst at 16% (w/v) of pulp density, finding removals of Ni and V of 149.5 and 920.5mg/kg, respectively [22]. The cookie is used to store the user consent for the cookies in the category "Performance". Microbes that can metabolize the waste may be added, along with nutrients. Species of genus Bacillushave been reported to remove metals Ni, V, Al, Fe, As, and Mg at different extents, and cell morphology changes have been detected at the end of biological treatment as a higher quantity of spores for Bacillus thuringiensisMNSH2-AH-3, 2m cells in pairs for Bacillus megateriumMNSS-AH-4, and long chain-vegetative cells having inclusions into the cell surface in Bacillussp. Reverse osmosis separates components in a liquid stream by applying external pressure to one side of a membrane so that solvent will flow in the opposite direction. 11. (v) Waste piles are non-containerised accumulations of solid, non-flowing hazardous waste. Due to these characteristics, bacteria can be used as biosorbents; in addition to that, their small size and rapid growth ability under pre-established conditions (temperature, pH, nutrients, aeration, etc.) Biological treatment of certain organic wastes, such as those from the petroleum industry, is also an option. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.32 842.04] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>>
: Top subscription boxes right to your door, 1996-2022, Amazon.com, Inc. or its affiliates, Learn more how customers reviews work on Amazon. A rotary kiln is a versatile large refractory-lined cylinder capable of burning virtually any liquid or solid organic waste, the unit is rotated to improve turbulence in the combustion zone. The main products from complete incineration include water, carbon dioxide, ash, and certain acids and oxides, depending upon the waste in question. There are sites in many countries where hazardous waste has been disposed of improperly and where clean-up operations are needed to restore the sites to their original state. %PDF-1.5
Publishing on IntechOpen allows authors to earn citations and find new collaborators, meaning more people see your work not only from your own field of study, but from other related fields too. New lagoons must be lined with impervious clay soils and flexible membrane liners in order to protect groundwater. If a leak does occur, the wells can be pumped to intercept the polluted water and bring it to the surface for treatment. Under this condition, it was able to remove 1007.4mg/kg of Ni, while V was removed at an extent of 5360.5mg/kg [27]. Dive into the research topics of 'Biological Treatment of Hazardous Waste'. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By Bienvenu Magloire Takem Mbi and Aloysious Kohtem L By Rodrigue Constant Sandjong Sani, Mama Ntoupka, Tou By Adjonou Kossi, Houetchegnon Towanou, Rabiou Habou, HeadquartersIntechOpen Limited5 Princes Gate Court,London, SW7 2QJ,UNITED KINGDOM, Marlenne Gmez-Ramrez and Sergio A. Tenorio-Snchez, Natural Resources Management and Biological Sciences, Biological systems for the treatment and recovery of metals, Microorganisms with potential for the treatment and recovery of metals, Treatment of spent catalysts of the petrochemical industry by microbial route. This volume covers both the fundamental principles and practical applications of the biological treatment of hazardous wastes. In order to reduce the amount of leachate in the fill and minimize the potential for environmental damage, an impermeable cap or cover is placed over a finished landfill. 3 0 obj
Physical treatment processes are important to most integrated waste treatment systems regardless of the nature of the waste materials or the ultimate technologies used for treatment or destruction. Due to high metal content, waste containing metals are considered as artificial source of minerals and valuable metals that can be recovered [9, 18, 22, 23]. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. The isolation of microorganisms from contaminated environments has led to finding microorganisms adapted to them, which have also developed certain metabolic strategies to detoxify their environment and, which are used for the treatment of different types of waste. If leachate is generated, monitoring and control systems must be provided. To counteract the effects of such contaminants, several methods and techniques have been implemented, each having its advantages and disadvantages. Screening is a process for removing particles from waste streams, and it is used to protect downstream pre-treatment processes. The use of plants in metal extraction (phytoremediation) has appeared as a safe and cost-effective alternative in the removal of heavy metals excess from soil and water [1]. The cookie is used to store the user consent for the cookies in the category "Other. The secretion of these acids by the cell also lowers the pH in the medium, protonating it, causing the solubilization of metals from a solid matrix to the liquid medium. Teichoic acids extend over the entire surface of the peptidoglycan, and given their negative charge, they give the cell wall of the bacterium its net negative charge, being the teichoic and lipoteichoic acids the ones that participate in the entrapment of metal ions on the surface of the cell wall. These processes are very useful for separating hazardous materials from an otherwise non-hazardous waste stream so that they may be treated in a more concentrated form, separating various hazardous components for different treatment processes, and preparing a waste stream for ultimate destruction in a biological or thermal treatment process. 6. Accumulated sludge must be removed periodically and subjected to further handling as a hazardous waste. title = "Biological Treatment of Hazardous Waste". In a single-chamber liquid system a brick-lined combustion chamber contains liquids that are burned in suspension; in addition to being the primary parts of an incineration system, these units are used as afterburners for rotary kilns. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Yet another process is solidification, which is achieved by encapsulating the waste in concrete, asphalt, or plastic. It is very effective for extracting acids and metal salts from solutions. The Gram-negative cell is a bit more complex, in which the peptidoglycan layer (cell wall) has a thickness of 27nm surrounded by an outer membrane of 78nm, and the peptidoglycan is between the plasma membrane and the outer membrane, which is composed of phospholipids, lipopolysaccharides (LPS), enzymes, and other molecules such as lipoproteins. These cookies will be stored in your browser only with your consent. T1 - Biological Treatment of Hazardous Waste. Biological treatment of hazardous waste (BTHW) involves natural and/or engineered biological systems with living organisms for treatment of hazardous waste. Landfill mining: in many regions of the world, landfills have long been seen as a final way to store waste at minimum cost. There are iron-oxidizing species within Acidithiobacillusgenus, as Acidithiobacillus ferrooxidans, which obtain their energy by oxidation of Fe2+ to Fe3+ [38]. Currently, the bioleaching process is the only one reported for the recovery of metals from depleted catalysts, where treatment efficacy has been proven up to 90% using Acidithiobacillusand Aspergillus. These include using waste acids and alkalies to neutralise one another, waste oxidants to treat cyanides and organic contaminants in water, salts and acids to salt out organic compounds from wastewater, on-site incinerators to dispose of organic vapours generated by other on-site processes, ash and calcium and magnesium oxides to aid in stabilisation processes, and combustible solids and liquids to produce blended liquid fuels. Landfilling of hazardous solid or containerized waste is regulated more stringently than landfilling of municipal solid waste. Treatment of spent catalysts of the petrochemical industry by microbial route. The bacteria have developed various resistance mechanisms to tolerate the harmful effects of toxic metals and have been abundant on the planet earth, and microbes have been exposed to them since basically the beginning of life, nearly 4 billion years ago [12]. Prior to land disposal, surface storage or containment systems are often employed as a temporary method. Bring your club to Amazon Book Clubs, start a new book club and invite your friends to join, or find a club thats right for you for free. By closing this message, you are consenting to our use of cookies. In addition, microbactan and B. firmusexopolymeric substances (EPSs) were nontoxic to Artemia salina nauplii, which is an aquatic model organism widely used in aquaculture activities [59]. Cited by lists all citing articles based on Crossref citations.Articles with the Crossref icon will open in a new tab. For most such wastes, land disposal is the ultimate destination, although it is not an attractive practice, because of the inherent environmental risks involved. <>
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them. 2017 Elsevier B.V. All rights reserved. Currently, there are various types of waste contaminated with metals, and various treatments are applied depending on the type of waste to be treated, among them are as follows: Domestic agricultural and industrial water: the conventional techniques for removing dissolved heavy metals include chemical precipitation, carbon adsorption, ion exchange, evaporations and membrane processes, electrodialysis, and photocatalysis [3, 4]. One problem posed by hazardous-waste incineration is the potential for air pollution. If the wastes are exposed to high temperatures in an oxygen-starved environment, the process is known as pyrolysis. Solvent extraction is a process for separating liquids by mixing the stream with a solvent which is immiscible with part of the waste but which will extract certain components of the waste stream. In general, regulations and sustainability have been the biggest drivers for the development of technologies for BTHW.". This bar-code number lets you verify that you're getting exactly the right version or edition of a book. At present, there are patented processes that are used in the world, among which stand out BIOX, BioCOP, BROGIM, GEOCOAT, and BacTech [51].
The purpose of a biological treatment system is to control the environment for micro-organisms so that their growth and activity are enhanced, and to provide a means for maintaining high concentrations of the micro-organisms in contact with the wastes. Physical processes include evaporation, sedimentation, flotation, and filtration. Biotreatment is a biological process in which live, dead microorganisms or metabolites produced by them are used such as enzymes, biopolymers, siderophores, organic acids, inorganic acids, and biosurfactants. These metal ions will be attracted by the negatively charged sites of cellular components. Register a free Taylor & Francis Online account today to boost your research and gain these benefits: Waste Management: Biological Treatment of Hazardous Wastes, Office of Technology Affairs , Massachusetts General Hospital , Boston, USA, /doi/pdf/10.1080/00139157.1991.9933177?needAccess=true, Environment: Science and Policy for Sustainable Development. Publisher In addition to Acidithiobacillusgenus, some fungi, as Aspergillus niger[39, 41] and Penicillium simplicissimum[40], have been studied for the production and secretion of organic acids such as oxalic, malic, gluconic, and citric acid. Pyrometallurgical recovery consists of the thermal treatment of ores and metal containing wastes to bring about physical and chemical transformations. In most of countries, solid wastes in land fill (open dump sites) are the most common means of disposal [5]. Although these microorganisms are the most reported in the literature for the treatment of spent catalysts, other microorganisms of the genus Bacillusare being evaluated for these bioleaching processes, and Bacillus megateriumwas studied for leaching Re and Pt using the cyanide produced by this microorganism [57]. 3. The siderophores are low molecular weight (<10 kDa) iron chelating compounds synthesized by many bacteria of which can be mentioned Pseudomonas, Azotobacter, Bacillus, Enterobacter, Serratia, Azospirillum, and Rhizobium[43, 44, 49] and are extremely effective in solubilizing and increasing the mobility of a wide range of metals such as Cd, Cu, Ni, Pb, Zn, and the actinides Th(IV), U(IV), and Pu(IV) [44].
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