Water treatment usually consists of several processes, some of which are costly. Raw water is purified in order
to provide consumers with clean and safe drinking water. Water suppliers sometimes have to accept high operating costs in order to achieve the desired drinking water quality. At the same time, consumers want to pay
the lowest possible price for water. Suppliers can therefore only control their process costs through optimized
treatment.
In the following example, we show how our solutions
lead to efficient water treatment while maintaining
the necessary quality.
The Solution
Sigrist offers quality and process control for each
process step in water treatment using the appropriate photometers. Based on a typical surface water
treatment plant, this consists of seven steps:
Raw water catchment
Addition of flocculant and sedimentation
Rapid filtration
Membrane filtration
Activated carbon filtration after treatment with ozone
Disinfection
Reservoir and network feed
Typical Application
A medium sized waterwork pumps 1 million m³ of water per year. The price of drinking water is 1.5 CHF/
m³. The suppliers do not operate on a profit-oriented basis, but on a cost-covering basis.
The Customer Benefit
Controlled flocculant dosing using turbidity mea
surement can save a waterworks almost CHF 1000
per year.
Monitoring the filters with turbidity and flow rate
(or alternatively pressure drop) can save CHF
25‘000 per year. The filters are only flushed as
required, which reduces water and energy costs.
Regenerating an activated carbon filter is very
energy-intensive. The activated carbon is cleaned in a multi-stage process. Temperatures of up
to 800°C are required. The filter service life can be
optimized by measuring SAK 254 after filtration.
It is estimated that annual costs of CHF 2000 can be saved.
During the disinfection step - especially when using
UV light - the control of the input turbidity ensures
that cleaning intervals are extended. This can save
several thousand CHF per year because the service life of the lamps is extended.
→ Overall, the operating costs of the waterworks are
reduced by at least CHF 35‘000 per year!
Technical Details
What makes our devices stand out:
High accuracy; also enables control of critical
process steps with the smallest change in measu
red value.
We do not offer a measuring device, but a measu
ring solution!
The standard version already includes 2x analog
signal outputs, various digital signal outputs and
Modbus TCP communication. This enables the
customer to design a variety of flexible solutions.
The low power consumption of our devices com
bined with the low maintenance requirements
reduce the operating costs for operators to a minimum
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Responsible for the application: Water, Industrial Processes, Beverages & Food for the regions: AG, LU, NW, OW, VS, BS, BL, SO, BE, FR, NE, VD, GE and JU
Responsible for the application: Water, Industrial Processes, Beverages & Food for the regions: TI, GR, UR, GL, SZ, ZG, ZH, SH, SG, TG, AR and AI Traffic & Environment: whole Switzerland
Seppitag: 19. März 2024, Ostern: 29. März – 01. April 2024, Auffahrt: 09. Mai 2024, Pfingstmontag: 20. Mai 2024, Fronleichnam: 30. Mai 2024, Bundesfeiertag: 01. August 2024, Maria Himmelfahrt: 15. August 2024, Allerheiligen: 01. November 2024, Maria Empfängnis: 08. Dezember 2024, Betriebsferien: 24. Dezember 2024 – 02. Januar 2025
Opening hours:
Monday–Friday 08:00am–12:00pm und 1:30pm–5:00pm
Public & company holidays:
St Joseph's Day: 19. March 2024, Easter: 29. March – 01. April 2024, Ascension Day: 09. May 2024, Whit Monday: 20. May 2024, Corpus Christi: 30. May 2024, Federal Holiday: 01. August 2024, Assumption Day: 15. August 2024, All Saints Day: 01. November 2024, Conception of Mary: 08. December 2024, Company holidays: 24. December 2024 – 02. January 2025