ARA Winznau; from flow measurement to dynamic sewer network control

Complete renovation of the exterior structures as general contractor
Topics
Land
  • Complete conversion of the control technology and new control system (ARAbella online)
  • Control technology with variable flow rate in the stormwater tanks
  • Several partially filled pneumatic outflow regulators

Inventory 2013

The special-purpose association of the Olten wastewater region (ZAO) includes 13 communities that treat their wastewater in the Winznau WWTP. The WWTP itself was and is already the subject of rehabilitation measures, but other structures in the sewer network were also in considerable need of rehabilitation, including pumping stations and stormwater tanks. Their automation was outdated, but also the work safety and comfort no longer met today’s requirements. The control technology also allowed little leeway, because the outflows were controlled purely mechanically, and the outflow quantities could neither be precisely set nor recorded. Furthermore, the flush valves were not equipped with a monitoring system, which would have resulted in very high drinking water consumption in the event of a defect.

Terms of reference

Requirements

  • Everything from a single source (general contractor mandate)
  • No burden on the sewage treatment plant staff due to reconstruction work: Renovate external structures at the same time as the sewage treatment plant
  • Increased occupational safety
  • Integral sewer network control (INKA) for water protection optimisation
  • Completely rehabilitated structures

Implementation

The defects are repaired step by step and the upcoming modernisations and optimisations with regard to occupational safety and comfort as well as explosion protection are carried out.
and comfort as well as explosion protection are carried out. In addition, STEBATEC AG is equipping the entire sewer network with dynamic, volume-precise flow controllers, which are integrated into the ARAbella process control system via STEBAnet and can thus be operated centrally. Everything is thus being prepared so that ZAO’s entire wastewater system can be integrally controlled in 2016. By then, the preparatory work on the INKA project, which will project, which will optimise the utilisation of sewer networks and storage volumes during rain events, should be completed by then. The web-based ARAbella coordinates the individual components, which also all have on-site intelligence. With the INKA controller it will even be possible to control the flow rates on the basis of the pollution loads and not only on the basis of the volumes.

Products in use

LDM partially filled waste water flow measurement
Ultrasonic transit time difference flow measurement for wastewater, raw wastewater and rainwater

LDM partially filled Flow measurement

Highly precise flow value acquisition. The LDM is a calibrated measuring device for backflow-free flow measurement of waste water in open channels or free flowing lines. 10 flow velocity measuring sections distributed over the entire cross section provide most accurate flow values when the sensor is partially or fully filled. The level measurement is integrated in the device housing.
TF stationäre Durchflussmessung teilgefüllt für Abwasser und Regenwasser
Ultrasonic transit time difference measurement with dry weather gutter

TF Stationary flow measurement partially filled

The TF Stationary Flow Measurement is a calibrated measuring channel for backflow-free flow measurement of wastewater, raw wastewater and rainwater in open channels or open channels.
Stationary flow measurement for waste water quantity measurement
Special solutions for measuring wastewater, raw wastewater and rainwater under the most difficult conditions.

Stationary flow measurement for wastewater

When the impossible becomes possible. High flow velocities, steep gradients, tight spaces, large measuring range. The more difficult the measuring task, the more suitable is the stationary flow measurement, which can often be retrofitted in existing structures and shafts.
INKA dynamische Kanalnetzsteuerung verhindert unnötige Mischabwasserüberläufe in die Gewässer
Software for safe and efficient sewer network optimization

INKA dynamic sewer network control

Intelligent management of the storage capacity in the sewer system makes a major contribution to water pollution control: it reduces overflows, makes optimum use of the storage volume in the sewer system and ensures the hydraulic capacity utilization of the wastewater treatment plant. Scientific studies show,
ARAbella online process control system for wastewater treatment plants and wastewater systems
The process control system for sewage treatment plants and sewer network operators with the highest demands on safety, function and comfort.

ARAbella local process control system

Process control system for sewage treatment plant and sewer system Waste water plants become controllable with the process control system ARAbella in the simplest way. Via the intuitive user interface, the processes of wastewater treatment plants and outdoor structures can be operated quickly, easily and reliably. The operating status of the plants is clearly displayed at any time.
Individual automation for safe and efficient processes.

PLC control systems STEBAsmart

We support you with risk analyses, electrical, control and energy concepts and individual PLC programming in operation and in the realization of automation projects.
STEBAnet data communication systems
Secure and volume-reduced data transmission on the Internet and in networks.

STEBAnet Mobile and Fixed Network Telecontrol

Networking and remote control of automation systems STEBAnet mobile, fixed and leased lines are data communication systems for decentralized control systems. Measurement data and control information are recorded on site for backup purposes and cyclically sent in packets or compressed form to the database of the central process control system. STEBAnet communicates in a way that preserves data volume and establishes connections only when needed, for example when a user at the process control system is viewing live data.
IT, Netzwerke, Cybersecurity
Secure separation from the Internet. High level of comfort.

IT, Networks, Cybersecurity

We offer tailor-made, cost-optimized and future-proof solutions for an optimal demarcation of automation systems from the Internet, while maintaining access to the systems in terms of comfort and flexibility.
General equipment for wastewater and drinking water engineering structures
Holistic solutions for highest quality and simple project structures.

General Equipment

With a company history that began in the 1960s, we are one of the leading companies in the project planning and realisation of reliable, precise and holistic solutions in the automation industry. Our project team consists of automation, electrical and software engineers, design and mechanical engineers, project managers, as well as installers and service technicians.
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Mattenstrasse 6a
CH-2555 Brügg
Switzerland

T +41 32 366 95 95
info@stebatec.ch

STEBATEC GmbH
Heilbronner Straße 150
D-70191 Stuttgart
Germany

T +49 322 2109 3142
info@stebatec-messtechnik.de

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