Discussion on Development and Application of Grainy Filtering Media Filtration

The filtration of grainy filtering media widely applies to the advanced treatment technology for wastewater.The filtration of fast-filter rapidly develops after using the technology of filtration.The technology of deep-bed filtering media filtration is apace develop while people empolder multifarious filtering media. The direct filtration technology emerges as the times require.The backwashing is the key technology of fast-filter.The effect of gas-water backwashing is superior to single-water backwashing on renewing filtration capability of filter bed.The technology of filtering media filtration comes forth some problem of losing filtering media with backwashing current,filtration bed induration,etc.Those problems are gradually improved in practice.