BioMon

Reliable on-line analyzer for organic carbon (TOC) and inorganic carbon (TIC)

Operation | Advantages | Technical Data

BioMon was developed to avoid the well-known problems of high maintenance in conventional TOC and COD analyzers.

True on-line TOC analysis provides the advantages of accurate control for waste water treatment plants or chemical processes without the disadvantages of the toxic chemicals used for COD analysis.

A daily analysis chart provides the user with essential information. Long-term results going back over days, weeks or months are also available to enable optimum process control.

A feature of the BioMon is the short analysis time, which allows analysis results to be used in processes running in under closed-loop control.

BioMon: easy to operate
Applications
  • Final effluent control for sewage treatment and industrial water treatment plants.
  • Waste water monitoring at airports using de-icing chemicals.
  • Process control in the chemical and pharmaceutical industry.
  • Paper and pulp production.
  • Discharge water from refineries.
  • Surface and river water monitoring.
  • Waste water from the milk industry.
  • Brewery waste water.
 

Operating Principle

The oxidation procedure used in BioMon is based on the action of hydroxyl radicals, and comprises the following stages:

Sample preparation
BioMon takes a sample without filtration or pre-treatment direct from the waste water stream.

TIC measurement
The pH is reduced to 2 by the addition of acid. Inorganic carbon in the form of CO2 is driven by a stream of oxygen and measured to give the Total Inorganic Carbon (TIC) value.

Oxidation
Sodium hydroxide is added to raise the pH to 12. An ozone generator converts oxygen to ozone, which then reacts with hydroxide ions to produce hydroxyl radicals. These oxidise organic material to CO2 .

TOC measurement
After the oxidation process is complete, acid is pumped into the reactor after which the CO2 is driven off by an oxygen stream and detected by the CO2sensor to generate the Value for Total Organic Carbon(TOC)

 
 

Advantages
  • No sample preparation.
  • Simple operation.
  • High concentrations of salt or fat in the sample do not affect the analysis results.
  • Accurate monitoring of chemical processes allows lower raw material and energy consumption.
  • Cost savings due to the continuous monitoring of the organic load of waste water.
  • Reduced risk of environmental pollution.
 

Technical data

Measuring method IR detection
Analysis cicle time
 ca. 12 min.
Measuring range
(selectable)

min. 0 - 50 mg/l as C
max. 0 - 5000 mg/l as C
Option:
0 - 50000 mg/l as C

Sample streams

1 standard
expandable to 3
Calibration

Factory-calibrated
Reproducibility

≤ ±5% or ≤ 3 mg C/l
Signal drift

≤ 5 % per year
Output signal

0/4 - 20 mA,
programmable
Load 500 Ohm
galvanically seperated
Linear response
RS232 Interface

For printer/PC
Limit alarm

1 potential-free contact per
sample stream
max. load 25 V AC,
60 V DC, 1A
General alarm

1 potential-free contact
max.load 25 V AC, 60 V DC, 1A

Sample
Connection Swagelok: tubing up
to 3.2 mm i.d.
Pressure pressure-free to 0.1 bar
overpressure
Volume 0.5 l/h
Solids content soft particles up to 2 mm
hard particles < 0.1 mm
(all organic compounds are
oxidised)
Temperature 1 - 30°C
Waste connection tubing up to
3.2 mm,
no back pressure
Reagent consumption ca. 9 ml acid
and 9 ml alkali per cycle
Power requirement 230/115 V AC ±10%
50/60 Hz
Power consumption 300 VA
Environmental temperature 2 - 35°C out of direct sunlight
Protection class IP 54 NEMA 4
Weight ca.100 kg
Dimensions
(H x W x D)		 1770 x 600 x 410mm
(free-standing)
 

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