Chemical Engineering :: Environmental Engineering
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The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria.
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Presence of dissolved impurities of __________ is responsible for the red brownish color of water.
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TLV of aldrin in public water supply system is about __________ μg/litre.
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A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.
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Removal of __________ is accomplished by aeration of water.
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Green house effect is accentuated by
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Thermal pollution due to excessive heat & temperature in the working place causes
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High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes
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The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is
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