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Environmental protection охрана окружающей среды Sewer pipes сточная труба Comprehensive utilization комплексное использование Domestic wastewater бытовой сток Environmental protection organizations организация по охране окружающей среды Grills сетка ； The term “three types of waste” refers to harmful gases, wastewater, and solid waste. A sedimentation tank is a container used for holding sediment. Environmental pollution refers to the contamination of the air and other elements of the environment. A primary treatment tank is used for the initial purification of wastewater. Eliminating pollution means removing contaminants from the environment. A secondary treatment tank is used for further purification of wastewater. Preventing the emission of black smoke means not releasing smoke into the atmosphere. A biological filter is a device used for removing dust and pollutants. Activated sludge is a substance used in wastewater treatment. Refurbishing furnaces involves modifying existing heating devices. An aeration tank is used to provide oxygen to wastewater. Chimneys are used to release smoke from industrial processes. Oxidation tanks are used for treating industrial waste. Coagulants are substances used to help settle particles in wastewater. It’s possible to extract many useful substances from these “three types of waste”. Coagulation is the process of causing particles to settle together ； coagulation Recycling useful materials Collecting suitable materials Ion exchange Converting harm into benefit Turning harmful substances into useful ones Electrodialysis Transforming waste into valuable resources Converting waste into assets Reverse osmosis Recovery tower Waste treatment tower Neutralization Wastewater ； Wastewater, Membrane method, Membrane technology, Wastewater treatment plant, Two-layer sedimentation tank, Industrial wastewater, Septic tank, Automobile exhaust gases, Treatment/Processing, Noise, Sludge swelling, Fog with smoke and soot, Biological treatment of wastewater, Flue gas, Biochemical oxygen demand, Particulate matter, Sludge digestion, Pollutants, Sanitary engineering facilities, Environmental monitoring, Suspended solids ； Suspended solids; Suspended solid matter. Emission monitoring; Control of emissions and discharges. Biodisk; Biological disk. Environmental science; Science related to the environment. Microorganisms; Microbial organisms. Ecology; Study of ecosystems. Residence time; Time of stay in a certain place. Ecological distribution; Distribution within an ecosystem. Vacuum filtration; Filtration using vacuum. Ecological differences; Variations within an ecosystem. Disinfection; Process of killing microorganisms. Ecotype; Ecological type. Chlorination; Process of adding chlorine. Bioecology; Study of the relationship between organisms and their environment. Load; Amount of something present. Leeward side; Area facing away from the wind. Activated carbon; Carbon with enhanced adsorption properties. Aneroid barometer; Barometer that does not use liquid. Aluminum sulfate; Salt derived from aluminum and sulfuric acid. Absorber; Device used for absorption. Iron chloride; Compound containing iron and chlorine. Chromatographic analysis; Method of separating substances based on their properties. Purification; Process of removing impurities ； Cleaning, electrostatic precipitator, electrical sedimentation device, diffusion, dispersion, dust collector, powder collector, evaporation, wind speed meter, anemograph, dilution, thinning, wind speed gauge, anemometer, condensation, air valve, air cock, convection, scrubber, air monitoring station, leeward side. Last edited by hezhh1999 on 2009-3-31 12:00