US 4,225,431 AGranted

Process and apparatus for the treatment of aqueous waste materials

AssigneePepsiCo, Inc.

InventorHarry C. De Longe

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Abstract

A process and apparatus for the treatment of aqueous waste materials or effluents, particularly the aqueous waste materials of bottling plants and installations, in which a trickling element is employed for the basic rough processing to effect the removal of biological oxygen demand (BOD). The discharge stream of effluent from the trickling element is conveyed into an oxidation-reaction tank, providing for the chemical oxidation of light organic floc resulting from biological action in the trickling element and further BOD reduction, and for the oxidation of any biomass sloughing off the media in the trickling element. The treated waste material or effluent discharge emanating from the oxidation-reaction tank is conducted through a mixing tank which is adapted to simultaneously receive the final rinse waste effluent from the bottling plant, and to intermix the two effluents and subject these to further oxidation treatment through the intermediary of admixing air therewith. The effluent from the mixing tank is conveyed into an aeration tank which provides for a lengthy period of detention and a circuitous flow path of the effluent so as to subject the waste material or effluent stream conducted therethrough to the maximum extent of aeration. A settling tank is adapted to receive light organic floc resulting from the aeration process in the aeration tank, and separate the waste material or effluent into a liquid portion and a solids-containing portion. A solids separator is adapted to receive an effluent comprising the solids-containing portion of the effluent from the settling tank and, additionally, any solids from backwash water from the bottling plant or water treatment recycling system.

Claims24

Dependent claims

An oxidation process for the treatment of an aqueous waste material effluent from a plant for filling containers with a beverage, comprising the steps of:

(a) passing an influent constituted of said aqueous waste material through a trickling element having a media therein having biological growth formed thereon to degrade BOD to form an aqueous waste material discharge stream;
(b) oxidizing light organic floc resulting from biological action in said trickling element and also any biomass sloughing off the trickling element media to further remove BOD by passing the aqueous waste material discharge stream from said trickling element into an oxidation-reaction tank, also conveying waste material from the beverage container filling plant into said oxidation-reaction tank, adding a flow of an oxygen-bearing gas to said oxidation-reaction tank for enhancing the chemical oxidation of the thusly combined aqueous waste materials detained therein, and detaining said discharge stream in said oxidation-reaction tank for a predetermined time interval to provide chemical oxidation therein before discharging it in a stream;
(c) admixing the discharge stream from said oxidation-reaction tank and a final rinse waste effluent from the beverage filling plant with air to effect oxidation treatment of said aqueous waste material in a mixing tank before discharging it in a stream;
(d) conveying the discharge stream from said mixing tank into an aeration tank imparting a circuitous flow path to the aqueous waste material therethrough while providing for aeration of the aqueous waste material, as through the imparted circuitous flow, and detaining said waste material in said aeration tank for a predetermined time interval before discharging it in a stream;
(e) separating the discharge stream from said aeration tank into a liquid portion and a waste solids-containing portion by passing it to a settling tank adapted to receive light organic floc from the preceding aeration process;
and
(f) separately conveying a discharge stream containing said waste solids-containing portion from said settling tank to a solids separator and concurrently withdrawing the treated liquid portion of said effluent for removal from said process.

4 more elements

An apparatus providing for oxidation treatment of an aqueous waste material effluent from a plant for filling containers with a beverage, comprising:

(a) a trickling element having means coupled to receive said effluent, including a media on which biological growth forms to degrade BOD for initially treating said effluent before discharging it in a stream;
(b) an oxidation-reaction tank having means coupled to receive the discharge stream of said waste material from said trickling element and also including means coupled to receive the waste material from the beverage container filling plant and support area drainage and means for detaining said waste material therein for a predetermined time interval, before discharging it in a stream, to subject it to means providing for chemical oxidation of light organic floc resulting from biological action in said trickling element and oxidation of any biomass sloughing off said media and to further remove BOD, and including means for adding an oxygen-bearing gas to the oxidation-reaction tank;
(c) a mixing tank, having means coupled to receive the discharge stream from said oxidation-reaction tank, and means for receiving a final rinse waste effluent from the beverage filling plant including means for admixing said waste material with atmospheric air before discharging it in a stream;
(d) an aeration tank having means coupled to receive the discharge stream from said mixing tank including means for imparting a circuitous flow path to said waste material through said aeration tank and means for detaining said waste material therein for a predetermined time interval before discharging it in a stream, and means for providing aeration for the aqueous waste material, as through the imparted circuitous flow;
(e) a settling tank having means coupled to receive the discharge stream from said aeration tank, including means for separating said waste material into a waste solids-containing portion and a liquid portion;
(f) a solids separator having means coupled to receive the waste solids-containing portion from said aeration tank;
and
(g) means receiving the liquid portion of said waste material from said settling tank including means for conveying said liquid portion to a drain.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/974,045Filed 28 Dec 1978 · continuation in part
Priority: 12 Sep 1977
Granted: 30 Sep 1980
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

C02F 3/121
Particular type of activated sludge processes: multistep treatment
B08B 3/14
With additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration: removing waste, e.g. labels,…
C02F 3/04
Aerobic processes: using trickle filters
C02F 9/00
Multistage treatment of water, waste water or sewage