【導(dǎo)讀】reduction,ionexchange,andprecipitation.

　　

【正文】 n 220 forms a solid barrier between the walls 170 and 180 this partition extends all the way down to the chamber separator FIG. 1 (150) which is a false floor of the system. The water flows in a circular motion through space between the inner chamber wall 170 and the outer chamber wall 180 until it makes a plete circle. While the water is making its second full rotation of the chamber between the inner and outer wall it is further cleaned. Once the water makes a plete circle it reaches the far side of the outer chamber flow director partition 220 and is directed out of the system through the outflow pipe 140. 10 [0038] Referring to FIG. 4 which shows the lower sedimentation chamber FIG. 1(110) the inflow pipe 130 is shown. This pipe es into the chamber and makes an abrupt 90[deg.] turn. The 90[deg.] turn of the inflow pipe 130 directs water in a circular motion around the sedimentation chamber. To enhance the circular motion of the water there is an antiscouring flow director 240 which not only prevents scouring of previously capture pollutants (located in the bottom/center of the sump). This flow director 240 also enhances the circular motion of the inflowing water by controlling the rate and direction of the water to a gradual circular spiral toward the center of the sump. In a preferred embodiment the flow director 240 is constructed from concrete. The bottom of the sedimentation chamber 110 is called the sump and it is concave or curved shape which further directs the water to its center. In a preferred embodiment there is an emergency access hatch FIG. 1 (155) which forms a donut shape around the transfer riser FIG. 1 (160). The access hatch 155 can be removed allowing access through the chamber separator FIG. 1 (150) to the sedimentation chamber 110 so that the unforeseen situations can be easily and effectively addressed. In a preferred embodiment the emergency access hatch 155 is approximately 30 inches in diameter. [0039] Referring to FIG. 5 water is seen ing from an underground storage tank 500. The water flows from the underground storage tank into the system through the inflow pipe 130. The water enters the sedimentation chamber 110 and is directed in a circular motion through this chamber. The water rises out of this chamber through the transfer riser 160. The water exits the transfer riser 160 through the water transfer orifices 200. The water flows into the treatment chamber 120 and is directed in a circular motion by the intricate system set forth in FIG. 3, supra. When looking at the system from a top angle, all one can see is the cleanout lid 190 of the transfer riser 160 extending slightly above the ground, the rest of the system 100 is covered with biomass (vegetation) 228 and looks like a normal planting ground. Once the water makes its circular rotations throughout the treatment chamber 120 and is cleaned it exits the system through the outflow pipe 140. [0040] Referring to FIG. 6, a crosssection of the treatment chamber 120 looking from the top is seen. FIG. 6 shows an embodiment of the system 100 where filtration screens 610, 620, 630, 640 and 650 are inserted. The insertion of filtration screens allows different types of filtration media to be placed in different sections of the vegetated filtration bed FIG. 2 (225). These filtration screens fit between the inner chamber wall 170 and the outer chamber wall 180. They slide into grooves which have been made in the inner chamber wall 170 and the outer chamber wall 180. The 11 grooves are inserted directly across from one another and run the length of the walls so that the filtration screens can be slid into the groove and makes contact with the walls 170 and 180 at the sides and chamber separator FIG. 1 (150) at the bottom. The screens are made of a porous material which can be a mesh, ting, and/or screen to allow water to freely pass through but keep larger molecules such as the filtration media separated. The system can be flitted with one screen or multiple screens such as is seen here in FIG. 6. In FIG. 6 the five filtration screens 610, 620, 630, 640, and 650 are inserted to create six separate partments for filtration media. Each partment can contain different filtration media. They thus form six filtration media partments 615, 625, 635, 645, 655 and 665. [0041] In one embodiment, stone can be inserted for pretreatment into one of the filtration media partments of the treatment chamber 120。 Perlite can be inserted in another partment for oil, nutrients and fine sediment removal。 BioSorb can be inserted into a third partment for the removal of hydrocarbons, sediment and dissolved metals。 Zeolite can be inserted into another partition for the removal of nutrients and soluble materials, and in yet another partietioned segment of the treatment chamber 120 Granular activated charcoal can be inserted for the removal of nutrients, herbicides, pesticides. A partment could also be filled with antimicrobial media such as hydroxyl apatite, silver modified media, or other positively charge media which would remove bacteria, and coliform polishing. [0042] In the embodiment shown in FIG. 6, where five filtration screens 610, 620, 630, 640 and 650 have been inserted in order to segment off sections of the treatment chamber 120, the first and largest partment 615 could contain washed stone. The water exits the transfer riser 160 and flow the entire circle from between this tube and the inner chamber wall 170 it passes through the filtration media in the treatment chamber 120. The water passes through the first screen into the next partment which could contain Perlite for a filtration media. The water would flow through the Perlite in order to filter out oil, nutrients and other fine sediment. The water would next pass through the second filtration screen 620 into the next ch