US924664A - Sewage-treatment apparatus. - Google Patents

Description

K. IMHOFF. SEWAGE TREATMENT APPARATUS.

. APPLIOATION FILED MAY 6, 1907.

Patented June 15, 1909.

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2T7? eases If? z/erz Tor 1&1 W ZWM K. IMHOFF.

SEWAGE TREATMENT APPARATUS.

APPLICATION FILED MAY 6, 1907.

924,664. Patented June 15,1909

2 SHEETS-SHEET 2.

f777/6777Z7r M1 kw 797 KARL IMHOFF, OF BREDENEY, NEAR ESSEN-ON-THE-RUHR, GERMANY.

SEWAGE-TREATMENT APPARATUS.

Specification of Letters Patent.

Application filed Kay 6, 1907.

Patented June 15, 1909.

Serial N0. 372,121.

To all whom it'ma-y concern:

Be it known that I, KARL IMHoFF, a subject of the King of Bavaria, residing at Brede'n'ey, near 'Essen-on-the-Ruhr, in Germany,

have invented a Sewage-Treatment Apparatus, of which the following is a specification.-

The basins and wells (also towers) used for the mechanical purifying of waste water are worked according to the depositing process or according to the decomposin process.-

When the depositingprocess is use the mud is frequently removed in order to prevent decomposition. The advantage thus secured is that the water remains fresh, but there is also the disadvantage that a large uantity of wet mud, diflicult to dry, must be isposed of. In the case of the decomposing process the mud is left in the water for a long time to become decomposed. In this case the bulk of the mud is considerably reduced, and it is more easily dried, but there is the disadvantage that the water becomes tainted by the decomposition and is liable to carry away the particles of mud in a state of suspension, and this is frequently inconvenient and in 1ur1ous.

The-object of this invention is to combine the advantages of the depositing process (which keeps the water fresh) with the advantages of the decomposing process (which allows of more easily disposing of the mud). Apparatus for this purpose is shown, in the annexed drawings in which Figures 1, 2 and 3 are respectively a "ertical section, a sectional plan and a cross-section of one form of the apparatus. Figs. 4 and 5 vertical and horizontal sections of a modified form and Figs. 6 and 7 similar sections of another modified form.

The depositing chamber 0,, a basin or well, is connected to mud decomposing chamber in such a manner that the impurities separated pass into the decomposing chamber b, in order to become decomposed therein, but so that the process of decomposition does not afi'ect the fresh, flowing water in the depositing chamber a, or only affects it very slightly.

'In the decomposing well there are formed, as is the case in all decomposing chambers, a floating layer and a bottom or ground layer of mud. Between these two layers is the clarified, decomposing liquid, which is in communication with the water in the depositing chamber. The mud particles driven upward and downward by the gases evolved a well or wells 1) forming a composing chamber below remain in the decomposing well. If the decomposing well is covered the said gases are removed by a ventilator. When decomposed, the mud can be easily removed at intervals from the deepest part of the decomposing well. a

The details of construction of the decomposing Well and-depositing chamber vary according to circumstances. Various constructions embodying the invention are shown by way of example in the annexed drawing.

In Figs. 1, 2 and 3 are shown two decomposing wells b with a depositing basin a. In this construction the basin a is placed over a well or wells 6 in such a manner that the mud passes uninterruptedly through bottom apertures a into the well or Wells 1). The floating bodies in the fresh water are held back by a wall or barrier d and pass through apertures e into the well b. The Wells may be connected by additional orifices, for example at f, in order that they are traversed veryslowly by water.

Figs. 4 and 5, and also Figs. 6 and 7, are sections and plan views of decomposing wells in conjunction withdepositing wells. The depositing well a is, for example, either withinv the decomposing well 1) (Figs. 4 and 5), or is annular and external (Figs. 6 and 7). The mud flows to the decomposing well I) from the deepest parts of the depositin well a. In this case also the floating bodies in the fresh water may be kept back by a wall or barrier, as in the construction shown in Figs. 1 to 3, and may be conveyed to the decomposing well by a conduit provided for that urpose.

What I claim as my invention and desire to secure by Letters Patent-of the United States is: v

1. In sewage treatment apparatus the combination of a depositing chamber having a mud outlet at the base thereof, a mud dechamber adapted to receive the deposited the depositingmud, means for preventing the return of gases and rising particles fromv the decomposing chamber to the depositing chamber and means for providing a-fiow of liquid throu h the depositing chamber without distur ing the quiescence of the decomposing chamber.

2. In sewage treatment apparatus thecombination of a depositing chamber the sides of which converge to a mud outlet at the base thereof and one of said sides-being out disturbingthe quiescence of the, decomprolon ed to extend 'ast the vertical plane posing chamber. 10 throng the ed e of t e other 'ofsa'id sides, a, In witness whereof Ihave signed this speci- ,de'composing c amber below the depositing fication in the presenceof two witnesses.

5 chamber said decomposingehamber eXLend KARL IMHOFF.-

ing upward. abovethe' level ofthe, sa'id mud Witnesses: l outlet and means for providing a flow of l ALFRED Ponpmnnm,

liquid through the depositing chamber with- ENGELS.

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