You are using a version of Internet Explorer (version 8 and / or older) or the compatibility mode, which does not support some functionalities of the site you're viewing. This page can be displayed correctly you therefore may not. In order to use the full functionality of the site is a current Internet Explorer or another browser (eg: Google Chrome, Firefox) necessary.
HomeServiceDownloads > Application reports

Application and Field Reports

Here, you will find application-related information for the use of WTW measuring systems from experience with concrete information about the process 

Field Reports

OptRF – optical, reagent-free measurement of COD, Nitrate and Nitrite

The chemical oxygen demand (COD), nitrate, nitrite and ammonium are among the central wastewater parameters, in order to ensure safe, optimized and smooth wastewater treatment processes. COD is a sum parameter, whose composition is very plant-specific due to the different contents of the respective wastewaters (the so-called wastewater matrix).

Susanne Gollor and Dr. Ulrich Franke

Measuring COD to detect inlet peaks

Carbon and nitrogen parameters can be measured easily and without the use of chemicals by means of the optical method of the UV-VIS and UV sensors. Steps such as sampling and sample preparation, which usually take a lot of time, are omitted. Another plus is the integrated, maintenance-free ultrasound cleaning process, which minimizes the manual cleaning effort for almost all applications. With this, parameters like COD and TOC, which are otherwise elaborate and expensive to detect, can be measured in the simplest way, as shown by the following practical example.

Dr. Natalie Leiprecht

Measuring of TOC for Effluent Control

The wastewater treatment plant Regensburg comprises 400,000 p/e and measures the total organic carbon (TOC) to control their outlet. In the past, this parameter was defined by means of an online analyzer. As this analyzer was outdated, a new device had to be purchased. In the middle of 2012, WTW provided a trial with a NiCaVis® 705 IQ. In addition to TOC, this multiple sensor can measure other parameters such as COD, BOD and nitrate.

Dr. Natalie Leiprecht

Use of the P 700 IQ to regulate the precipitant dosing

Wendlingen grouped wastewater treatment plant (GKW) – A new component of the IQ SENSOR NET is the analyzer P 700 IQ for the determination of orthophosphate. It can be integrated into new or existing systems as easily as a sensor. This analyzer is the best choice for wet chemical measurement of the orthophosphate concentration directly in the process. It is used to support phosphate elimination as well as to monitor the phosphate load in the wastewater treatment plant. Regardless whether it is used in outdoor or indoor applications – the P 700 IQ always performs brilliantly, as the following practical application example at the Wendlingen grouped wastewater treatment plant (GKW) shows.

Dr. Natalie Leiprecht

Use of the P 700 IQ to monitor the phosphate load

KA Neuruppin wastewater treatment plant – A new component of the IQ Sensor Net is the Analyzer P 700 IQ for the determination of orthophosphate. It can be integrated into new or existing systems as easily as a sensor. This analyzer is the best choice for wet chemical measurement of the orthophosphate concentration directly during operation. It is used to support phosphate elimination as well as to monitor the phosphate load in the wastewater treatment process. Regardless whether it is used in outdoor or indoor applications – the P 700 IQ always performs brilliantly, as the following practical application example at the wastewater treatment plant Neuruppin shows.

Dr. Natalie Leiprecht

D.O. Measurement

A Dissolved Oxygen (DO) Depth Profile with optical and galvanic dissolved oxygen sensors

Comparative DO measurement in lake “Eishaus”, part of the “Osterseen” lake region in Bavaria Germany

Unique: Data to the lab and back with IQ-LabLink

For the data exchange between the WTW online measuring system IQ SENSOR NET and the photoLab® 6000/7000 Series photometer you will only need a USB stick now. The rest will be done automatically by means of the software function IQ-LabLink. The matrix adjustment between the WTW nitrogen probes VARiON®, AmmoLyt® and NitraLyt® including the data documentation are as easy as never before.

The Photometry Dictionary: Tips and tricks for photometric measurements – from our customers' magazine WATERWORLD.

Susanne Gollor

SAC is not equal to SAC

The spectral absorption coefficient is generally referred to as SAC (unit: 1/m). It is used to determine the sum of the dissolved organic water content substances by means of laboratory or process photometers. Upon a closer look, you will find that for measurements that differ greatly in their methods, the collective term SAC is used.

The Photometry Dictionary: Tips and tricks for photometric measurements – from our customers' magazine WATERWORLD.

Susanne Gollor

Ion Selective Sensors (ISE)

Long-term experience in wastewater treatment: With a new ion-selective in-situ, direct measurement sensor for ammonium and nitrate

Continuous research and further development of ion-selective (ISE) measurement technology has now enabled the technology to be applied to online measurement applications for direct measurements in wastewater.
The new ammonium and nitrate combination sensor with automatic compensation of the main interfering ions has many advantages including low investment costs, low operating costs and ease-of-use.

We would like to thank the plant manager of the wastewater plant, Mr. Christian Fimml (graduate engineer) as well as the two sewage technicians, Mr. Josef Brandacher and Mr. Christian Flatscher, for their skilled assistance during the entire test period.

Are you interested
in signing up for the free
WTW newsletter?
Newsletter
registration

WTW Newsletter Registration

Any Question?
We advise
you gladly!
Contact

WTW Contact