Waste Water Cleaning Basins

(Production Series DORNOW A and B)

for the separation of sinking particles

(in special design also of floating particles)

from waste water - with automatic discharge facility

The waste water cleaning basins (production series DORNOW A and B) serve, above all, as subsidence zones for waste waters with slowly working discharge devices. 

Substances and particles heavier than water have the possibility to deposit at the bottom. Lighter particles float on the water surface. 

In the basins are conveying devices, consisting of plastic chains with drivers. The plastic drivers move at a very low speed - if necessary around the clock - without causing any noticeable whirl over the bottoms and near the water surface of the cleaning basins. Thus, they remove, at one side of the basin, the deposited particles (type A) and at the other side of the cleaning basin the floating matter/particles, too (type B). 

At one point of the basins the waste water is let in as gently as possible, at another point the water precleansed that way leaves the cleaning basins again. 

The water precleansed this way can be reused for other purposes wherever necessary. 

Advantages and disadvantages of waste water cleaning basins:

With a minimum of electric energy (0.18 kW) one will achieve a cleansing of the waste water to a high degree. One should compare here the energy consumption of a decanter or of fast rotating separators. 

Moreover, the slow movement of the conveying facility reduces wear and tear, in contrast to the a.m. alternative devices. 

It must surely be considered as a disadvantage of the cleaning basins that they occupy some floor space. However, they can, in certain cases, be also put up in the open air - protected from frost.

Sizes and construction types of cleaning basins

The cleaning basins of the production series DORNOW A and B are available in different sizes and construction types. Many special designs can be supplied, too.

1. General dimensions, capacities of cleaning basins (production series DORNOW A):

Waste water cleaning basins (production series DORNOW A from 10 - 25 m³) made of stainless steel, with adjustable discharge device for sinking matter/particles:

Item-No.            Denominations, capacities (volumes), gen. dim. (lxwxh) appr., in mm

1010                 Waste water cleaning basin A-A-VA, cap. 10 m3, 8250 x 1800 x 2150
1011                 like 1010, but type A-B-VA, cap. 15 m3, 8600 x 1800 x 2550
1012                 like 1010, but type A-C-VA, cap. 20 m3, 8950 x 1800 x 3250
1013                 like 1010, but type A-D-VA, cap. 25 m3, 9000 x 1800 x 4000

Waste water cleaning basins (production series DORNOW A from 10 - 25 m³) made of mild steel, ground-coated, lacquered, with adjustable discharge device for sinking matter/particles:

Item-No.            Denominations, capacities (volumes), gen. dim. (lxwxh) appr., in mm

1020                 Waste water cleaning basins A-A-ST, cap. 10 m3, 8250 x 1800 x 2150
1021                 like 1010, but type A-B-ST, cap. 15 m3, 8600 x 1800 x 2550
1022                 like 1010, but type A-C-ST, cap. 20 m3, 8950 x 1800 x 3250
1023                 like 1010, but type A-D-ST, cap. 25 m3, 9000 x 1800 x 4000

2. General dimensions (production series DORNOW B):

Waste water cleaning basins (production series DORNOW B from 10 - 25 m3) made of stainless steel, with adjustable discharge device for sinking and floating matter/particles:

Item-No.            Denominations, capacities (volumes), gen. dim. (lxwxh) appr., in mm

1030                 Waste water cleaning basins B-A-VA, cap. 10 m3, 9750 x 1800 x 2150
1031                 like 1010, but type B-B-VA, cap. 15 m3, 10100 x 1800 x 2550
1032                 like 1010, but type B-C-VA, cap. 20 m3, 10450 x 1800 x 3250
1033                 like 1010, but type B-D-VA, cap. 25 m3, 10500 x 1800 x 4000

Waste water cleaning basins (production series DORNOW B from 10 - 25 m3) made of mild steel, ground-coated, lacquered, with adjustable discharge device for sinking and floating matter/particles:

Item-No.            Denominations, capacities (volumes), gen. dim. (lxwxh) appr., in mm

1040                 Waste water cleaning basins B-A-ST, cap. 10 m3, 9750 x 1800 x 2150
1041                 like 1010, but type B-B-ST, cap. 15 m3, 10100 x 1800 x 2550
1042                 like 1010, but type B-C-ST, cap. 20 m3, 10450 x 1800 x 3250
1043                 like 1010, but typ B-D-ST, cap. 25 m3, 10500 x 1800 x 4000

Connection of slowly rotating DORNOW separators before cleaning vats

Our slowly rotating separators of the types 360 (Item-No. 1000) and 390 (Item-No. 1001) can be connected before the cleaning basins. The sieve fabrics can be exchanged, so that an adaptation to the requirements is possible. They are also available with automatic sieve cleansing facilities.

Please also have a look at the papers (published on the Web) and the brochure listed below:

Treatise Q59*:            "A simple way of cleaning waste water in the potato and vegetable processing industry"
Treatise Q74*:            "Separation of solid matter from liquids - drum separators type 360 and type 390"

Brochure P201:           "Waste water treatment and separation technology"

* Published on the Web in English and German

Pictures: Please see on the WEB

This paper contains non-committal notes. We do not lay claim to completeness. Alterations reserved. 
Our order confirmation, accepted by our customers, is in effect upon delivery. The presentation of a new edition of this treatise will substitute for any previous versions. 
Copyright by DORNOW food technology GmbH, D-40549 Düsseldorf

DORNOW total on the Web:                www.dornow.de   /    www.dornow.com

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Dornow food technology GmbH, Willstätterstr. 12, D-40549 Düsseldorf - Germany, USt-Id.-Nr. DE119264470
Tel. ++49-211-527060, Mobile ++49-172-2614932, Fax ++49-211-596883, email office@dornow.de, Internet: www.dornow.de, 
Commerzbank AG, Konto-No. 1452333, BLZ 300 400 00, Managing Director Karl-Dietrich Dornow, Amtsgericht Düsseldorf, HRB 22597