Liquid purification or separation – Constituent mixture variation responsive
Patent
1982-03-01
1985-08-06
Castel, Benoit
Liquid purification or separation
Constituent mixture variation responsive
210194, 2101953, 210219, 210521, 210926, C02F 320, C02F 316, C02F 318
Patent
active
045334706
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention concerns an apparatus for the treatment of liquids. More particularly the invention concerns apparatus for the biological purification of household sewage and/or industrial sewages containing organic contamination. Also the apparatus of this invention causes the aeration and/or sedimentation of liquids. The apparatus comprises a circular, quadratic or elongated oblong basin for receiving the liquid wherein a path recurring to itself is formed by means of one or more partition walls. For moving the liquid in a horizontal and/or in a horizontal and vertical direction there are used one or more propellers and/or rotors with a horizontal and/or vertical axle. For the aeration of the liquid one or more aerators with a horizontal or vertical axle and/or one or more fixed air blowers are applied.
BACKGROUND ART
The so-called biological sewage treatment systems, in which dissolved organic substances are removed from the liquid or sewage are well known. In these systems the sewage is led into an aerating basin that is saturated with a mass of activated sludge with bacteria; the aerated sewage is led into a secondary sedimentation basin where the sludge is separated by sedimentation and recirculated into the aerating basin while the purified water is discharged from the system. An apparatus and a method of this kind are disclosed in Hungarian Pat. No. 166,160. These serve to circulate and aerate liquids in the course of their operation in biological sewage treatment plants i.e. oxidating trenches. In this known installation the streaming energy of the liquid to be treated is increased by means of a pump. In addition, a water jet pump is actuated by the energy of moving liquid, while air is introduced through the pump-wheel. In the course of the process the aeration step and circulation step are not separated. German Pat. No. 24 18 586 discloses apparatus in which biological sewage treatment can be carried out e.g. in a pool, wherein the water is divided into pathways by means of separation walls. In the path, in a predetermined mutual distance from each other, air-water injecting means produce a horizontal stream i.e. the water is allowed to stream in a horizontal direction. In this case aeration and circulation are not separated.
German Patent DE-OS 28 16 390 discloses a sewage treatment plant using the activated sludge process, in which several aerating trenches running parallel and connected in series are inter-connected by means of sections of circular arches (90.degree. or 180.degree.). At the ends of the separation walls separating the single aerating trenches, aerating wheels with a vertical axle are arranged, while in every second trench are pipe propellers with a horizontal axle. Accordingly, in this process circulation of the liquid and aeration are separated. The system is known as the Carrousel system.
The known biological sewage treatment plants using activated sludge do not solve optimally the task of aeration and sedimentation. Efficiency is low regarding both energy utilization and purification. Simultaneously space requirements are large and several drawbacks are involved in respect to operational techniques.
SUMMARY OF THE INVENTION
An object of this invention is to reduce or eliminate the disadvantages of the known plants serving for the treatment and purification of liquids, and sewage by providing an apparatus which, when compared to the known apparatus works with a higher efficiency and increased economy.
A further object is to enable the better utilization of space, the so-called intensification, which is a considerable problem worldwire. Thus, for example, on a worldwide scale several thousands of the so-called oxidizing trenches are operated, the major of which are overburdened. Accordingly, problems relating to enlarging the plants have to be confronted. Often the erection of a new installation becomes impossible because of lack of space. By using this invention, problems of said character can be successfully solved. A further object of the invention is
REFERENCES:
patent: 3421626 (1969-01-01), Schramm et al.
patent: 3990974 (1976-11-01), Sullins
patent: 4146478 (1979-03-01), Rongved
patent: 4199452 (1980-04-01), Mandt
patent: 4226717 (1980-10-01), Malm
patent: 4303516 (1981-12-01), Stensel et al.
patent: 4362625 (1982-12-01), Beard
patent: 4383922 (1983-05-01), Beard
Castel Benoit
Katona Gabriel P.
Novex Talalmanyfejleszto es Ertekesito Kulkereskedelmi Rt.
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