Control Technology

Convenient, safe and efficient control


AERsmart – intelligent, efficient, trendsetting
The load operation in biological wastewater treatment plants is characterised by strong fluctuations. The innovative AERsmart machine control system is the intelligent module that distributes the required oxygen demand across the machinery in such a way that low, medium and heavy loads are processed as efficiently as the existing configuration permits. To this end, the performance ranges and efficiencies are factored into the algorithm used by the control system. In this way, the installed machine pool operates as close as possible to the theoretical maximum efficiency.

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AERtronic is the intelligent unit control system from AERZEN. Developed to offer you more. More transparency over your plant’s condition. More reliability, driving the best possible operations at any time. More possibilities, driving analyses with pinpoint accuracy. Or for integrating additional components. Such as power cabinets.

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AERtronic Master

The AERtronic Master makes it possible to improve overall plant efficiency and to use individual machines in a more homogeneous way. In addition, the AERtronic Master allows you to graphically display the machines' operating states and to transmit the data to the customer's control room in compressed form. The connection is carried out optionally via Profibus: Alternatively, this can also be achieved by an expansion module via Profinet.

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AERZEN Webview

With AERZEN Webview you can retrieve operating data and service information any where at any time. A big step in direction of lasting process reliability!

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Aerzen’s AERprocess Dissolved Oxygen Control is an integrated solution for controlling the dissolved oxygen (DO) concentration in the activated sludge treatment process and the blowers used to generate the process air flow requirement.

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Digitisation opens up new opportunities for companies in many industries to optimise processes. In blower and compressor technology, the trend is moving more and more towards automated recording, evaluation and analysis of operating data. This approach makes it possible to identify potential for improvement and to optimise the operation of compressors in the long term.

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Information & documents


Control technology


AERZEN control technology

AERZEN is an internationally leading manufacturer of high-performance air compressors and application specialist, in particular in the field of wastewater treatment in wastewater treatment plants. AERZEN doesn't just build machines which compress gaseous media. It has also developed opportunities to implement and control these machines in a highly efficient manner.

In the field of wastewater recycling in wastewater treatment plants, the positive displacement blowers, rotary lobe compressors, screw compressors and turbo blowers are used for the oxygen supply in aeration tanks. Most of the energy requirements of a plant are utilised for the production of compressed air that is required for this. It is therefore very important that the machines are efficiently controlled and only generate as much oxygen as necessary at any one time. If the assemblies are over-utilised when minimal oxygen is required, this will have a negative impact on the efficiency of the overall plant. However, the compressed air requirement in wastewater treatment plants varies greatly. Consumption during the day is high, but less so at night. More water is required in summer than in winter. Water consumption also fluctuates during the day and therefore also the requirement for oxygen in the wastewater treatment plant.

In order to generate a volume flow which is adapted to each actual requirement, AERZEN has developed various innovative and highly-efficient blower controls which automatically regulate the application of various blower or compressor combinations according to requirements. The machines can be connected individually, in pairs or even in threes. This enables the machines to be controlled as efficiently as possible and very closely to the load curve, and prevents plants from supplying oxygen over and above the current requirement.

These innovative, connected solutions and automated processes allow AERZEN to set milestones on the road to Industry 4.0 and to promote trend-setting, resource-saving wastewater management as defined by Water 4.0.

Generally, there are two different types of control: the decentralised control which has a fixed link to a machine and the central control, which coordinates several machines at a higher level outside the individual assemblies – furthermore, a distinction must be made between single-user and global controls. A single-user system, as the name suggests, controls just one “workstation” or a machine in the plant whereas a global control system controls several machines. The following explains and highlights these terms with the help of the compressed air controls AERtronic and AERsmart:


The AERtronic is a traditional local assembly control: AERtronic is being used all over the world to control Delta Blower, Delta Hybrid and Delta Screw machine types from AERZEN. As an individual blower control, it is generally built into the acoustic hood of a machine. However, it can also be installed separately onto a rack.

The compressor control opens up a broad spectrum of options and uses for the plant operator: The clear and intuitive 4.3" TFT display (thin film transistor display) with touchscreen allows technicians to control the machine locally, read process data such as operating hours, service hours or operating events and monitor process values on site. After commissioning and entry of the operating parameters (including warning and overload settings), the AERtronic independently takes over control of the machine. For example, based on the key figures, it controls the use of the machine at optimal working pressure. Using an additional module called “WebView”, decentralised monitoring via intranet in the factory is also possible and, using the relevant VPN client, even external control via smartphone, other mobile device or PC is possible from any location in the world. Current operating data, the transfer of error messages, operating hours, alarm messages, vibrational monitoring, service planning and the display and evaluation of process data over predefined time periods can thus be called up, regardless of the location of the compressor.

This kind of monitoring has huge advantages. It primarily gives the opportunity to react promptly to deviations, error or alarm messages. Servicing can be planned more effectively, vibrational monitoring allows better detection of regular wear and tear up to and including carrying out genuine condition monitoring. Compressor control is linked to all current interfaces: In addition to the standard MODBUS RTU, PROFIBUS DP, MODBUS Gateway between RTU and MODBUS TCT (Ethernet) and PROFINET© can all be used. Furthermore, there is an option to extract signals such as incoming and outgoing pressure, oil pressure or temperatures and provide them in the form of a 4-20 mA signal. As a decentralised control, the AERtronic can connect and synchronously control up to five AERZEN machines with the same priority and design via the MODBUS RTU. This base load/toggle switching is already installed in every AERtronic.

The AERtronic has also achieved a new dimension of machine transparency, since it logs and saves its process data on compressor or blower operation together with the corresponding date – which in turn enables the targeted analysis of operating processes at a later date. Based on the data, maintenance and service times can be systematically planned and corrective measures can be introduced in a more targeted manner. This increases the operating times of the machine. 

The result is more efficient compressed air control which, depending on requirements, switches on or off machines working in a linked system. This avoids idle times and minimises load run or idle switching cycles.


Unlike AERtronic, the latest AERZEN development in the area of controls is AERsmart, which was designed as a global control system from the very beginning. Specially developed for the wastewater market, it represents the jewel in the crown of the innovative Performance3 world by providing additional energy-saving potential.

Performance3 describes the efficient operation of a group of three different AERZEN blower technologies: the Delta Blower, a positive displacement blower, the Delta Hybrid, a rotary lobe compressor and the Aerzen Turbo, a turbo blower or turbo compressor. The individual machines are optimised for various volume flow ranges. The developers' preliminary innovative idea was therefore to combine the various machine technologies for a needs-based and flexible utilisation of the various strengths of the machines with regard to energy efficiency. The Turbo is also described as a turbo machine and provides the most efficient performance close to its nominal point. Delta Hybrid and Delta Turbo are displacement machines – they provide good efficiency even under partial-load operation. Blower, Hybrid and Turbo can be implemented individually, in pairs or threes, as required. This optimises energy usage for each load requirement. The variable application of these various technologies has enabled energy savings of up to 30% to be achieved in wastewater treatment plants. The AERsmart control additionally increases the efficiency produced by the Performance3 combined operation: up to 15% from the application of this innovative control alone.

The AERsmart thus acts as a conductor, which in each case switches to the most efficient machine or the most efficient combination of machines. The performance range data of the assemblies and their efficiency are saved in the AERsmart algorithm. The intelligent evaluation of these details results in an active regulation of the integrated machine system. The coordination and control of up to twelve machines, also third-party models, is thus possible. The requested volume flows are distributed intelligently amongst the individual machines.

Furthermore, as with the AERtronic, it enables process data to be saved and analysed and transferred to other systems. While the AERtronic only controls displacement machines, i.e. blowers and compressors, the AERsmart also controls other technologies like the turbo blower.

How does this work? The oxygen quantity, compressed air and volume flow values required in the aeration tanks are transferred to the control as nominal value signals or via a bus connection. The AERsmart then selects the optimal machine combination from the group. In this way, the volume flow is always precisely generated in line with the load. The required air quantities are optimally distributed across the various technologies and their efficiency. This generates the oxygen supply in the aeration tank more efficiently than ever before – even with frequent changes in load, it produces a virtually perfect characteristic diagram.

AERsmart is available as a wall-mounted or console design. Since it always represents a central control and not an individual one, it is not built into a machine. A user-friendly interface and intuitive menu guidance enable simple installation. The high-resolution 12" touchscreen clearly displays the total process data and the data from the individual machines. The monitor can, for example, display the total air quantity and the differential pressure of recent days, detailed information on the individual machines, the utilisation per week, individual air quantity or pressure flow of recent days. In this way, the performance and life cycle of each compressor, as well as of the total machine park, can be monitored and analysed. Like the AERtronic, AERsmart therefore provides an unprecedented level of transparency regarding the total life cycle of the machine or the group of machines. The control communicates via analogue signals or bus systems, such as MODBUS, PROFIBUS or PROFINET. It can be networked with the process control and other systems. As with AERtronic, the application of AERZEN WebView enables remote diagnostics via an intranet or the Internet. What's more, just like the AERtronic, the AERsmart also has a comprehensive range of languages to choose from and in this way guarantees the secure use of the control all over the world.

With both the AERsmart and AERtronic controls, AERZEN has taken an important step in the direction of Industry 4.0 and the "Internet of Things". Both controls open up the opportunity for digitised, intelligent and resource-saving production as well as machine to machine communication.

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Find your regional contact and get personal advice.

Aerzener Maschinenfabrik GmbH (Headquarter)

Reherweg 28

31855 Aerzen

Phone: +49 5154 81-0

Fax: +49 5154 81-9191

Emmerthaler Apparatebau GmbH

Langes Feld 4

31860 Emmerthal

Phone: +49 5155 622-0

Fax: +49 5155 622-11

Aerzen Turbo Europe GmbH

Freibusch 2-4

31789 Hameln

Phone: +49 5151 92384 0

Aerzen Digital Systems GmbH

Hefehof 8

31785 Hameln

Phone: +49 5151 40302660

AERZEN Deutschland GmbH & Co. KG (Sales)

Reherweg 28

31855 Aerzen

Phone: +49 5154 81 4000

AERZEN Deutschland GmbH & Co. KG (Service)

Reherweg 28

31855 Aerzen

Phone: +49 1516 110 2901

Aerzen do Brasil Ltda

Rua Dionysio Rito, n° 300, Distrito Industrial III, L14 Q D

13213-189 Jundiaí

Phone: +55 11 4612-2021

Fax: +55 11 4612 0232


Pezinská 18

901 01 Malacky

Phone: +421 34772 5531

Fax: +421 34772 5529

- Sales Office South West

Brückenstraße 2a

66740 Saarlouis-Fraulautern

Phone: +49 6831 76828 0

Fax: +49 5154 81 716410

Aerzen Argentina SRL

Domingo de Acassuso 4743

B1605BFO Munro, Buenos Aires

Phone: +54 11 47622351

Aerzen France S.A.S

Zone Industrielle 10, Avenue Léon Harmel

92168 Antony Cedex

Phone: +33 1 46741300

Fax: +33 1 46660061

Aerzen Belgium N.V.

A.De. Coninckstraat 11

3070 Kortenberg

Phone: +32 2 757 22 78

Fax: +32 2 7572283

Aerzen Schweiz AG

Gewerbepark Morgenstern Im Alexander 4

8500 Frauenfeld

Phone: +41 52725-0060

Fax: +41 527250066

AERZEN Nederland B.V.

Bedrijventerrein Nieuwgraaf Fotograaf 3

6921 RR Duiven

Phone: +31 26 3197530


Typograaf 5

6921 VB Duiven

Phone: +31 88 9100050

ASP AERZEN Special Products B.V.

Bedrijventerrein Nieuwgraaf Fotograaf 3

6921 RL Duiven

Phone: +31 26 4463432

Fax: +31 26 4463049

Aerzen Finland OY AB

Teollisuustie 15

FI-02880 Veikkola

Phone: +358 9 8194720

Aerzen Colombia S.A.S.

Centro Empresarial Metropolitano, Bodega 27, Módulo 2 (Autopista a Medellín, km 3,4) Cota, Cundinamarca,

Código Postal 250017 Código

Phone: +57 601 841 5730

Fax: +57 601 841 5730

Aerzen Austria Handelsges.m.b.H.

Gewerbepark Tresdorf II/1

2111 Tresdorf

Phone: +43 2262 74388

Fax: +43 2262 74399


Al. Niepodleglosci 18

02-653 Warszawa

Phone: +48 22 489 55 22

Fax: +48 22 489 55 27


Alíz Utca 4

1117 Budapest

Phone: +36 1 4392200

Fax: +36 1 4391922

AERZEN CZ s.r.o.

Hraniční 1356

69141 Břeclav

Phone: +420 519 326 657

Fax: +420 519 326658

Aerzen Ibérica S.A.U

Calle Adaptación 15-17

28906 Getafe (Madrid)

Phone: +34 91 642 4450

Fax: +34 91 642 2903


Rua Alfredo Lopes Vilaverde, 15B Escritório 3

2770-009 Paço de Arcos

Phone: +351 21 468 2466

Fax: +351 21 468 2467


Aerzen House, Langston Road

IG10 3SL Loughton, Essex

Phone: +44 2085028100

Fax: +44 2085028102


61 Woodlands Industrial Park E9 E9 Premium, #07-01

757047 Singapore

Phone: +65 6254 5080

Fax: +65 6254 6935

company profile

Aerzen Taiwan Machinery

Branch office of Aerzen Asia No.170, Ln. 879, Guangfu Rd., Bade Dist.,

Taoyuan City 33457

Phone: +886 3 366 6660

Fax: +886 3 366 6536

company profile

Aerzen Scandinavia AB

Östra Bangatan 20

19560 Arlandastad

Phone: +46 8 59441880

Fax: +46 8 59117209

Aerzen Scandinavia Norway

Raveien 320

3184 Borre

Phone: +47 91 81 49 00

Aerzen Scandinavia Denmark

Industrivej 2

5550 Langeskov

Phone: +45 20 44 55 81

Aerzen USA Corporation

108 Independence Way

Coatesville, PA 19320

Phone: +1 610 380 0244

Fax: +1 610 380 0278


980 Rue Valois, Suite 100 Vaudreuil-Dorion

J7V 8P2 Quebec

Phone: +1 450 424 3966

Fax: +1 450 424 3985

Aerzen México S.A. de C.V.

Cerrada Uniroyal # 18-A, Col. La Michoacana

Metepec, 52166

Phone: +52 722 235 9400

Fax: +52 722 235 9401

AERZEN MAKINE San. Ve Tic. Ltd. Sti.

IMES Sanayi Sitesi, C Blok, 308. SK, No:14, Y.Dudullu

34776 Ümraniye Istanbul

Phone: +90 216 420 00 32

Fax: +90 216 420 00 79

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AERZEN Machines (India) PVT. LTD.

Plot No. E-115/116, G.I.D.C , Manjusar, Tal. Savli, Dist:

Vadodara-391 775 Gujarat

Phone: +91 2667 264-817

Fax: +91 2667 264-818

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Via Raffaello Sanzio, 52

20021 Bollate (MI)

Phone: +39 02 6707 5277

Fax: +39 02 6707 5003


No. 655 Yuan Dian Road, Min Hang District

Shanghai 201108

Phone: +86 21 3323 9000

Fax: +86 21 3323 9199

Aerzen Romania S.R.L.

Sat Tunari Comuna Tunari Sos. De Centura nr. 25A

RO 077180 Judet Ilfov

Phone: +40 21 243 1883

Fax: +40 21 243 1884

Aerzen ME - FZE

DSO-DDP-Office-A1-222 Dubai Silicon Oasis P.O. Box: 341445


Phone: +971 0 432 431 66

Aerzen Adria d.o.o.

Varazdinska ulica, II odvojak 3

42000 Varazdin

Phone: +385 42 370 808

Fax: +385 42 370 018

Aerzen Australia Pty Ltd

57-59 Rodeo Drive

3175 Dandenong

Phone: +61 3 97067702

Fax: +61 3 9706 8584

Aerzen Chile SPA

Limache 3363 – Bodega 13

CP: 2520642 Viña del Mar

Phone: +56 32 235 8900

Aerzen Perú SAC

Carr. Panamericana Sur Km. 29.5 Almacenes F-08 y F-09 ZI Megacentro – Altura Puente Vidu

 Lurin – Lima

Phone: +51 1 434 3831


Sheraton Housing 35 el moltaka el araby, Nozha elgedida. Appt - 7, 8, 9.


Phone: +20 2 22698855

Fax: +20 2 22696611

Aerzen AIRGAS (PTY) Ltd.

175 Domkrag Street, Robertville Ext. 1

Roodepoort, Johannesburg

Phone: +27 0 11 474 2193

Fax: +27 0 11 474 2321


4-Jinnah Cooperative Housing Society, Block 7/8, Main Sharea Faisal

75350 Karachi

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Patraikou 21-23, Flat 101, Palouriotisa TK 1048, P.O. Box 25283

1308 Nicosia

Phone: +357 22441222

Fax: +357 22490641

L.A Engineering & Consulting Ltd

PO Box 2907, 25 Ha‘ela Street

40500 Even Yehuda

Phone: +972 9 8996544

Fax: +972 9 8996547


Ul. Archaritza 2A

4006 Plovdiv

Phone: +359 32 966 681

Fax: +359 32 966 702

Aerzen Adria d.o.o.

Varazdinska ulica, II odvojak 3

42000 Varazdin

Phone: +385 42 370 808

Fax: +385 42 370 018

Airgas Compressors (PTY) Nigeria Limited

3, Adebukola Omolabake Street, Off Eric Omobude Street, Ifako Bus Stop, Along Oworonsoki - Ogudu Expressway


Phone: 00234 0 1 843 4234

Aerzen Thailand Co., Ltd

36/60 Village No. 5, Phlu Ta Luang, Subdistrict, Sattahip District

20180 Chonburi

Phone: +66 0 38 020 090

Fax: +66 86 664 1337


Representative office of AERZEN ASIA PTE. LTD Floor 8th, Unit 802A, Dai Minh Convention Tower, 77 Hoang Van Thai, Tan Phu Ward, District 7, Vietnam

 Ho Chi Minh City

Phone: +84 28 3535 2760

Aerzen Turbo Co, Ltd

800 Jeongjung-ri, Osong-eup, Heungdeok-gu, Cheongju-si,

Chungcheongbuk-28220 Korea

Phone: +82-43-238-6500

Fax: +82 70 4170 4567

local partner: DEWA Projekt OÜ

Väike-Ameerika 15

10129 Tallinn

Phone: +372 50 39239

Aerzen Finland OY AB

Teollisuustie 15

FI-02880 Veikkola

Phone: +358 9 8194720

Aerzen Australia - New Zealand Office

Unit 17a Hobill Avenue Wiri

2104 Auckland

Aerzen Australia Pty Ltd

57-59 Rodeo Drive

3175 Dandenong

Phone: +61 3 97067702

Fax: +61 3 9706 8584


Unit 6a, Castlecomer Business Park, Kilkenny Rd, Ballyhimmin

R95 Castlecomer, Co. Kilkenny

Phone: + 353 567807085

Aerzen Korea Ltd

Hyundai Terrace Tower, E-dong #608, 7, Yeonmujang 5ga-gil, Seongdong-gu,

04782 Seoul

Phone: +82 2 6463 0063

Fax: +82 2 6463 0064

Aerzen Turbo Co, Ltd

800 Jeongjung-ri, Osong-eup, Heungdeok-gu, Cheongju-si,

Chungcheongbuk-28220 Korea

Phone: +82-43-238-6500

Fax: +82 70 4170 4567

Aerzen Arabia Ltd.

Abed Al-Mis’hal Tower 9th Floor, office 907, Building 3958, District 35514 Al Jubail, Kingdom of Saudi Arabia


Phone: +966 13 362 8826

Service Centre - Aerzen Arabia Ltd.

Rezayat Group Dammam Port Area, Dammam Kingdom of Saudi Arabia


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