Patent ID: 6074562
Filing Date: 2000-06-13
Classification: B01D,C02F,Y10S

Abstract:
A method of removing all of the hydrogen sulfide from potable water that contains hydrogen sulfide, comprising the steps of:injecting sufficient air into said potable water to create a potable water and oxygen mixture having a dissolved oxygen level of at least about 6 ppm;pumping said potable water and dissolved oxygen mixture into a closed pressurized tank so as to create a turbulent mixing zone in the tank adjacent the upper level of the potable water in the tank;raising and maintaining the pressure of said potable water and dissolved oxygen mixture in said tank to a pressure that never falls below about 55 psi;precipitating all of the sulfur in said potable water by maintaining said potable water and dissolved oxygen mixture at said pressure that never falls below about 55 psi for at least about a minimum period of time selected from the following table for the indicated hydrogen sulfide levels: H2S Time (ppm) (min)  0.0-0.1 6 0.1-0.2 25 0.2-0.3 35 0.3-0.4 40 0.4-0.5 45 0.5-0.6 48 0.6-0.7 52 0.7-0.8 54 0.8-0.9 57 0.9-1.0 60 1.0-1.1 63 1.1-1.2 65 1.2-1.3 68 1.3-1.4 70 1.4-1.5 73 1.5-1.6 75 1.6-1.7 77 1.7-1.8 80 1.8-1.9 82 1.9-2.0 84 2.0-2.1 86 2.1-2.2 87 2.2-2.3 88 2.3-2.4 90 2.4-2.5 92 2.5-2.6 94 2.6-2.7 95 2.7-2.8 97 2.8-2.9 98 2.9-3.0 100 3.0-3.1 101 3.1-3.2 102 3.2-3.3 103 3.3-3.4 104 3.4-3.5 104 3.5-3.6 105 3.6-3.7 105 3.7-3.8 106 3.8-3.9 107 3.9-4.0 108 4.0-4.1 109 4.1-4.2 110 4.2-4.3 111 4.3-4.4 112 4.4-4.5 112 4.5-4.6 113 4.6-4.7 113 4.7-4.8 114 4.8-4.9 114 4.9-5.0 115;  providing a quiescent non-turbulent potable water zone adjacent the bottom of said tank and settling downwardly the sulfur particles that have precipitated in said turbulent mixing zone;flushing the settled precipitated particles of sulfur out of said tank at said tank bottom; andwithdrawing treated potable water that is completely free of hydrogen sulfide and precipitated sulfur particles from said tank at a level that is spaced from said bottom.