Organic matter degradation, effects formation

In slow filtration, much of the effect is obtained by the formation of a filtration layer, including the substances that are extracted from the water. At the early stages of the operation, these substances contain microorganisms able to effect, beyond the filtration, biochemical degradation of the organic matter. This effect also depends on the total surface of the grains forming the filter material. The probability of contact between the undesirable constituents of the water and the surface of the filter medium increases in proportion to the size of the total surface... 

Chemical/Physical. Ultrasonic irradiation (205-1078 kHz) of methyl tert-butyl ether (100 mM) in water in the presence of ozone maintained at 23 °C yielded tert-butyl formate and tert-butyl alcohol (Kang et al., 1999). The highest reaction rates occurred at 358 and 618 kHz. The combination of ozone and ultrasonic irradiation was more effective in degrading methyl tert-butyl ether than ultrasound and ozone alone. The investigators concluded that the combination of ozone and ultrasound irradiation was most effective at a frequency of 358 kHz. The rate of degradation of methyl tert-hniyX ether was not affected in the presence of natural organic matter. 

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