Surface Aerator

Features

Biogest’s surface Aerators with the commercial name of CROWN was developed in cooperation with Technische Hochschule Darmstadt university for circulation and oxygen provision to the wastewater activated sludge.

The CROWN surface aerator has been successfully installed in more than 150 plants due to their main characteristics as follows.
1) Intensive mixing in aeration tanks: according to the specific design that creating horizontal and vertical currents a complete mixing will be achieved.

2) Minimum efficiency: 2.5 Kg O2/KWh
3) Capable of working in fixed and variable water level. So based on oxygen demand and aeration tank dimensions its CROWN surface aerators are as below table.

 

CROWN OB 2500

CROWN OB 2000

CROWN OB 1600

CROWN OB 1200

CROWN OB 900

CROWN OB 750

VA 1.4301

Material

85

52

31

18

8

5

Maximum Oxygen input (KgO2/h)

45

37

22

11

5.5

3

Motor power(KW)

2500

2000

1600

1200

900

750

Diameter of aerator (mm)

998

832

720

600

400

333

Height of aerator (mm)

24

20

16

14

10

8

Number of blades

500

400

200

120

45

38

Aerator weight (Kg)

19

19

15

11.5

9

8

Max. tank length

6

5

4.5

4

3.5

2.5

Water level

1

1

1

1

0.8

0.8

Freeboard (m)

2250

1850

1100

550

275

150

Max. tank volume (m3)

Combination of mixing (denitrification) and oxygen provision (nitrification) according to operation of aerator in different speed, low speed for mixing and high speed to provide oxygen demand.

هواده سطحی

4) Completely steel construction
5) long life time without reduction of its efficiency due to robust construction
6) low energy consumption
7) low maintenance, all required maintenance parts are located above water level so any required repair would be easy

Application in fixed and variable water level is based on following.

1- Fixed water level:
1-1- Lateral installation (installation near the wall), to ensure the needed mixing of tank’s content it is necessary to be complemented by a mixer.

هواده سطحی
هواده سطحی

1-2- Central installation, the aerator has to be installed on a bridge

هواده سطحی
هواده سطحی

2- Variable water level
2-1- Lateral installation (installation near the wall), to ensure the needed mixing of tank’s content it is necessary to be complemented by a mixer.

هواده سطحی
هواده سطحی

2-2- Central installation, the aerator has to be installed on a bridge

هواده سطحی
هواده سطحی

Installed example in Polen, CROWN 2000, 30KW

هواده سطحی

Installed example in Germany, CROWN 1600, 15KW

هواده سطحی

Customized design:
Under consideration of project-related requirements the standard scope of delivery of the CROWN surface aerator can be enlarged by several optional components. The main optional components are as follows:
1- Complementing by a crusher unit, the advantage is reject of particulates which incoming with sewage which makes the requirement of pretreatment no more necessary.

هواده سطحی