Three types of infiltration trenches including capillary and typical were studied to assess the influence of technical construction of trench on nitrogen and phosphorus removal from countryside sewage, and results showed that removal efficiency of NH3-N, total nitrogen and total phosphorus in the system were above 95%, 80% and 90% respectively.

This article analyzes the difference of the traditional leaching layer blind drain and the geotextiles blind drain, introduces the geotextiles applyin g on the drainage under highway and the designing principle of the soil sustaini ng, filter, preventing-block of the geotextiles, approves the applying effects of the geotextiles on the blind drain by the measuring data of the drainage faci lity.

A percolation leaching test was carried out on cement-solidified fly ash specimens to simulate the case of rain penetrating into them, then into soil and finally into groundwater.

The results showed that the CB content of the composite corresponding to the highest heating temperature was the upper limit of CB content in conductive percolation region.

Fermentation filtrate of spiramycin was treated by ultrafiltration and percolation.

As the advanced wastewater purification system, infiltration has gradually showed widely used foreground in the fi.

The mechanism of rock-forming processes of infiltration vein-like skarn in Gejiu tin deposit is an-alyzed using multi-phase and multi-component equilibrium theory.