초록 ▼

A diffused bubble aeration system for small scale water supplies includes a plurality of water holding vessels having water inlet and water outlet couplings operatively coupled in series for series flow of water through the successive vessels. The inlet and outlet openings are located substantially

A diffused bubble aeration system for small scale water supplies includes a plurality of water holding vessels having water inlet and water outlet couplings operatively coupled in series for series flow of water through the successive vessels. The inlet and outlet openings are located substantially below the normal water level in the vessels, for example, substantially at the mid section of the respective vessels for equalization of volume and water level in the vessels. The series coupled vessels, barrels or drums comprise a first vessel having a supply water inlet coupling for coupling to a water supply and a last vessel or drum with a treated supply water outlet coupling to treated water supply water pump and pressurized treated water storage tank. Each vessel or drum is assembled to constitute a diffused bubble aeration stage having a spiral coil air diffuser arranged near the bottom of the vessel but spaced from the bottom of the vessel or drum for delivering diffuse low pressure air bubbles for stripping and purging volatile contaminants from supply water in the vessel. Each vessel or drum is formed with air inlet and outlet couplings with air inlet and outlet couplings and lines operatively coupled in parallel for parallel flow of diffused air through the water in the vessels or drums. The air outlet coupling at the top of each vessel vents the contaminant laden air. The drums or vessels comprise multiple stages for staged bubble aeration and staged flow or plug flow of supply water passing through the stages. The volume capacity of the drums is selected for residence time of supply water in the multiple stages adequate for staged aeration stripping and removal of volatile contaminants to a selected limit without substantial mixing between stages during aeration and while meeting current demand for supply water.

대표청구항 ▼

A diffused bubble aeration system for small scale water supplies comprising: a plurality of water holding vessels having water inlet and water outlet couplings and supply water line segments operatively coupling the water holding vessels in series for series flow of water through successive vessels,

A diffused bubble aeration system for small scale water supplies comprising: a plurality of water holding vessels having water inlet and water outlet couplings and supply water line segments operatively coupling the water holding vessels in series for series flow of water through successive vessels, said series coupled vessels comprising a first vessel having a supply water inlet coupling adapted for coupling to a water supply for receiving influent supply water and a last vessel having a treated supply water outlet coupling for delivering treated supply water; a treated water supply water pump operatively coupled to the last vessel outlet coupling; each vessel comprising a diffused bubble aeration stage having air diffuser means near the bottom of the vessel for delivering diffused low pressure air bubbles for stripping volatile contaminants from supply water in the vessel, said air diffuser means being spaced from the bottom of the vessel to facilitate mixing and circulation of water in the vessel; said vessels being formed with air inlet and air outlet coupling means and air inlet and air outlet lines operatively coupled in parallel for parallel flow of diffused air through the vessels, the air inlet coupling means of each vessel being operatively coupled to the respective air diffuser means, the air outlet coupling means being operatively coupled at the top of the vessel to a vent means for venting contaminant-laden air from the top of the vessel after diffusion through supply water in the vessel; a low pressure high volume air pump operatively coupled to the air inlet coupling means; said vessels comprising multiple stages for diffused bubble aeration of supply water, passing through the stages, the volume capacity of said vessels being selected for residence time of supply water in the multiple stages adequate for staged aeration stripping and removal of volatile contaminants to a selected limit without substantial mixing between stages during aeration and while meeting current demand for treated supply water; and electrical cor:trol means comprising water pump relay switch means and air pump relay switch means adjusted and arranged for operation of the air diffuser means for stripping contaminants from supply water passing in series through the vessels during selected time periods upon operation of the treated water supply water pump for stripping and removal of volatile contaminants to the selected limit.