 Renovation of used water from poultry processing plants |
| OF THE INVENTION Referring now to FIG. 1, shown at 10 therein is a block diagram of a process for ... |
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| Two stage traveling bridge filter |
| This invention relates generally to liquid filtration systems and, more specifically, to traveling ... |
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| Permanent hydrophilic modification of fluoropolymers |
| OF THE INVENTION The present invention relates to a permanent hydrophilic modification for ... |
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| Method and apparatus for dissolved air flotation with aeration |
| The present invention overcomes the above difficulties by recirculating waste water from the ... |
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| Use of hydrocarbon polymers in demulsification |
| We claim: 1. A demulsifier composition comprising 1 to 20,000 parts of an oxyalkylated alkyl phenol-... |
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| Hydrophobically associating polymers for oily water clean-up |
| OF THE INVENTION The process of this invention for treating oily water or oil-in-water emulsions ... |
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| Method of charge neutralization using chelants |
| OF THE INVENTION The present invention consists of a way to reduce the amount of Na.sup.+ needed ... |
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| Process for the separation of oil-in-water emulsions |
| What is claimed is: 1. A process for the separation of an oil-in-water emulsion in which the ... |
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| Methods for removing iron from crude oil in a two-stage desalting system |
| OF THE PREFERRED EMBODIMENT Turning to FIG. 1, there is shown a desalter system 2 comprising ... |
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Method and apparatus for treating organic wastewater
| Details |
Inventors: Heil, Richard W.; Rose, Thomas A.;
Assignee:
Primary Examiner: Castel; Benoit
Assistant Examiner:
Attorney, Agent or Firm: McWilliams, Mann, Zummer & Sweeney
A method and apparatus for achieving high quality treatment of organic waste water (both domestic and industrial types), which can also be used to treat organically contaminated water supplies or to reduce hazardous organic wastes (cyanides, PCBs, etc.) The apparatus operates at elevated pressures (up to about 35 psig), at high levels of dissolved oxygen (over 5 PPM), and at high concentrations of activated sludge (about 10,000 mg/l, MLSS). It consists of four separate process compartments (2 aeration compartments, a separator and a clarifier) which are contained within three vessels or alternatively in two vessels. The process compartments are linked in series by passageways and by piping and are maintained at a uniform pressure using a common manifold. The process is designed for simplicity of operation, compactness, and maintenance by a single part time attendant. |
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DETAILED DESCRIPTION Referring now to the drawing of the apparatus, all standard components shown, such as the valves, pumps, blower, air compressor assembly, liquid level controller and piping (which are not described in the claims) are conventional and their uses and functions are well known in the art.
Reference may also be made to our copending U.
S.
patent application Ser.
No.
359,585, filed Mar.
18, 1982, now U.
S.
Pat.
No.
4,415,452 (the disclosure of which is incorporated herein by this reference).
The configurations shown in both FIG.
#1 and FIG.
#2 have been sized for a sewage strength of 200 mg/l BOD.
sub.
5 and a treatment rate of 12,000 gallons per day (gpd).
The mixed liquor concentration will be maintained at about mg/l SS, for a food to micro-organism (F:M) ratio of about 0.
20.
Sizing and dimensions are only approximate and could be scaled upward or downward, depending on the strength and quantity of sewage to be treated.
Referring to FIG.
1, organic wastewater that has been screened and degritted (or macerated) is pumped continuously or intermittently (as needed) into the first stage aeration compartment (vessel #1) by means of a suitable single stage centrifugal pump 4, through a suitable flap gate check valve 5 into the top of air lift or pump 26, where it intermixes with the return sludge and is discharged into aeration tank #1.
The mixed liquor (wastewater and return sludge) in compartment #1 is dosed with a continuous stream of air bubbles 8 rising from aerator head 7 located in the bottom of the compartment of vessel #1.
The diffused air bubbles 8 become attached to the sludge floc and bouy it upward to the interface of the vessel #1 air dome 9, where the floc is further saturated with air before sinking downward along the walls of compartment of vessel #1.
Oxygen transfer to the mixed liquor occurs through diffusion of air bubbles from aerator head 7 into the liquor and from a rolling interface of the liquor withthe air dome 9.
Elevated pressure within the aeration compartment (preferably about 35 pounds per square inch gauge) provides an extremely efficient driving force for transfer of oxygen into the mixed liquor
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Liquid Purification 
