Best available technologies to reduce pollution
Best available technologies (BAT) refer to the most effective and economically viable methods that industries can employ to minimize their environmental impact, particularly in reducing pollution. Governments, particularly in the U.S. and Europe, have enacted laws mandating industries to adopt these techniques to control emissions and discharges into air, water, and soil. The term "available" indicates the existence of these technologies or their potential for development, emphasizing that they must be affordable based on a cost-benefit analysis.
BAT standards primarily target toxic pollutants, requiring industries to comply within three years once a substance is classified as toxic. In contrast, non-toxic conventional pollutants are governed by separate best conventional technology standards. Each industrial application seeking emissions permits is evaluated on a case-by-case basis, taking into account environmental, energy, and economic factors.
For air pollutants, BAT may include advanced production techniques and fuel cleaning systems, while the Clean Water Act outlines effluent guidelines aimed at eliminating discharges of pollutants into U.S. waters. The selection of technologies must ensure that they do not generate additional pollution or compromise public health and ecosystems. Overall, the implementation of BAT is a crucial step in promoting sustainable industrial practices and protecting environmental quality.
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Best available technologies to reduce pollution
Definition: The most efficient control and treatment techniques that are economically achievable by various industries to limit adverse environmental impacts
As concerns regarding all forms of pollution have increased around the world, many governments—including those of the United States and many European nations—have responded with environmental laws requiring industries to employ the best available techniques to reduce polluting emissions and discharges.
Major U.S. industries receiving national permits, usually from the Environmental Protection Agency (EPA), for new or modified emissions and point source discharges regulated by the Clean Air Act and the Clean Water Act are required to use the best available technologies to reduce environmental pollution. Best available technologies, also known as best available control technologies and best available techniques, include state-of-the-art controls on emissions and discharges into environmental media such as air, water, and soil. The term “available” means that the technology exists or is capable of being developed. A best available technology, however, must be affordable based on a cost-benefit analysis.
In addition to best available technology standards, the environmental laws in the United States include requirements for best conventional technologies. The best available technology mandates generally apply to pollutants that are considered to be toxic or are labeled as nonconventional because no determination has yet been made concerning their toxicity. However, once the EPA determines that a pollutant is toxic, an industry has three years to meet the best available technology standards that apply to that pollutant. Conventional pollutants, such as agricultural chemicals that have the ability to accumulate in body fat but have not been deemed toxic, are governed by the best conventional technology standards.
The permitting agency reviews each major industrial application for a stationary source permit to allow emissions into the air or discharges into the water on a case-by-case basis. Environmental, energy, and economic impacts are all considered in determining which processes and techniques an industry can afford while still protecting the environment. A variance from a best available technology standard may be granted as part of the permitting process to an industry that has agreed to use the best technology that is financially achievable, even if the technology is not the latest available. The technology used, however, must not create further pollution. For example, an industry will not receive a waiver to the best available technology requirements under the Clean Water Act unless it can show that the discharge controls and techniques it will utilize will not interfere with the quality of public water supplies, recreational activities, or wildlife, fish, and shellfish populations.
Under the Clean Air Act some of the best available technology standards include production and treatment techniques and fuel cleaning and combustion systems for various regulated air pollutants. Under the Clean Water Act effluent guidelines are based on best available technologies to achieve the goal of eliminating the discharge of all pollutants into the waters of the United States. Some of the factors considered in the cost-benefit analysis to determine if the effluent technologies are economically feasible include assessment of existing equipment, facilities, and techniques used in effluence reduction; the cost to achieve further effluent reduction; and other environmental impacts that are not related to water quality but that may occur if new technologies are employed, such as increased energy requirements. In addition to effluent guidelines, the Clean Water Act requires the use of best available technologies to minimize environmental impacts for cooling water intake structures that might be used in industries that produce heated water, such as nuclear power plants and food and beverage manufacturing facilities employing pasteurization.
Bibliography
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