Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1973-12-03
1977-08-16
Wyse, Thomas G.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 9, 210 11, 210 16, 210170, 210195S, C02C 108
Patent
active
040424944
ABSTRACT:
A sewage treatment simultaneously treats raw sewage and transports the effluent to a location where the treated effluent can be economically reused. The system converts raw sewage to primary effluent, and the solids in the primary effluent are transported to an aerobic sludge activator which converts the solids to activated sludge. The remaining primary effluent is mixed with the activated sludge and pumped up a pressure pipe treatment line which is preferably an upwardly inclined conduit at least 1000 feet long. Air or oxygen is injected into the treatment line downstream of the pump so that oxygen is dissolved at a relatively high pressure and in a sufficient amount to meet the biological oxygen demand (BOD) of the organic matter in the sewage. By the time the sewage reaches the outlet end of the line it contains substantially completely treated water and activated sludge.
Trunk sewers collect raw sewage and transport it by gravity to a headworks facility. Some of the waste water in the raw sewage is intercepted in the trunk sewer system, and is pumped into the pressure pipe treatment line. The remaining portion of the solids and waste water in the trunk sewer system are sent to the headworks. This reduces considerably the required hydraulic capacity of the trunk sewers, the primary treatment facility, and the pressure pipe treatment line, and eliminates almost completely the conventional secondary treatment facility. Activated sludge is removed from the pressure pipe treatment line and returned through the trunk sewers to the downstream sewage treatment facility to insure an adequate supply of activated sludge for continued treatment and for meeting the varying conditions in the raw sewage.
After substantial reduction of the sewage BOD, the treated sewage or effluent is maintained under anaerobic conditions to encourage bacteria to denitrify the effluent.
REFERENCES:
patent: 1963354 (1934-06-01), Currie
patent: 3211167 (1965-10-01), Clift et al.
patent: 3335082 (1967-08-01), Ullrich
patent: 3525685 (1970-08-01), Edwards
patent: 3607735 (1971-09-01), Hover et al.
patent: 3730884 (1973-05-01), Burns et al.
Irvine Ranch Water District
Wyse Thomas G.
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