Rain storing tank

Claim 1

The method of reducing pollution of open waters by controlling the flow of mixed rain water and sewage to a purification plant, comprising the steps of: establishing a flow path having a flow capacity for directing mixed rain water and sewage to a purification plant having a handling capacity and limiting the flow capacity of said path to a value not exceeding the handling capacity of said plant; establishing a generally circular holding station having a storing capacity at that end of said flow path opposite to said purification plant; directing mixed water and sewage from a predetermined drainage area to said holding station and from said holding station to said limited flow path; directing said polluted mixture of rain water and sewage at the beginning of each rain fall tangentially into said station to induce circular flow thereof and prevent accumulation of solids at the bottom of said station; temporarily holding the polluted mixture of rain water and sewage at said holding station which exceeds the flow capacity of said limited flow path, up to the storing capacity of said holding station while continuously releasing said polluted mixture of rain water and sewage from the central bottom portion of said holding station to said limited flow path; discharging any further supply of dilute mixed rain water and sewage exceeding the storing capacity of said holding station and the flow capacity of said limited flow path from said holding station to ambient surroundings whereby only said polluted mixture is directed to said purification plant.

Claim 2

The method of reducing pollution of open waters by controlling the flow of mixed rain water and sewage to a purification plant, comprising the steps of: establishing a flow path having a flow capacity for directing mixed rain water and sewage to a purification plant having a handling capacity and limiting the flow capacity of said path to a value not exceeding the handling capacity of said plant; establishing a generally circular holding station having a storing capacity at that end of said flow path opposite to said purification plant; directing mixed water and sewage from a predetermined drainage area to said holding station and from said holding station to said limited flow path; directing said polluted mixture of rain water and sewage at the beginning of each rain fall tangentially into said station to induce circular flow thereof and prevent accumulation of solids at the bottom of said station; temporarily holding the polluted mixture of rain water and sewage at said holding station which exceeds the flow capacity of said limited flow path, up to the storing capacity of said holding station while continuously releasing said polluted mixture of rain water and sewage from the central bottom portion of said holding station to said limited flow path; discharging any further supply of dilute mixed rain water and sewage exceeding the storing capacity of said holding station and the flow capacity of said limited flow path from said holding station to ambient surroundings whereby only said polluted mixture is directed to said purification plant.

Claim 3

The method of clam 1 wherein the step of: discharging said further supply of relatively dilute mixture is performed at the upper portion of said holding station, when accumulated mixture exceeds the capacity of said holding station; and conducting said further dilute mixture to ambient surroundings.

Claim 4

The method of clam 1 wherein the step of: discharging said further supply of relatively dilute mixture is performed at the upper portion of said holding station, when accumulated mixture exceeds the capacity of said holding station; and conducting said further dilute mixture to ambient surroundings.