Air quality control by TRS MEDOR - Case Study

Context & Challenges

Globally, the wastewater treatment is the first public health issue. Urban development leads turbanization near waste water treatment plant and extension of sewerage network. These aspects induce tan augmentation of sulfur compounds (H2S, mercaptans and sulfides) which are very corrosive, odorant and toxic. Tmonitor these compounds online CHROMATOTEC® offers high meteorological solutions.

Odors are very distinct air contaminants as they generate nuisances. The factors playing a role in the determination of odor annoyance are: odor concentration and intensity, frequency, appreciation, duration, synergy and location. CHROMATOTEC® proposes an automatic solution twell identify the origin and the level of odors.

Chromatotec® Solutions

TRS MEDOR ppb or ppm for up t14 compounds

With only one instrument, it is possible tanalyze up t14 sulfur compounds. Thanks tspecific sulfur detector (SSD) and AIR or N2 carrier gas, the separation and sensitivity is excellent down t1 ppb levels and low odor unit/m3.

The instruments are being calibrated with primary gas standard certified at ±2%. There are ninterferences due tthe gas chromatography separation and the sulfur specific detector. The analyzer is LINEAR: range 0 / 100 ppb.

The instruments are fully automated thanks tinternal calibration (airmoCAL). The VISTACHROM software controls the analyzers, multiplexer, meteorological station and enables storage and display of the chromatograms thanks tPeak Viewer.

It is possible ttransfer data ta data logger or modelling software with the communication protocols MODBUS RTU, JBUS, German PROTOCOL and X-Path.

A comprehensive solution for odor monitoring, including:

• Data Acquisition and transmissions
• GPRS/ModBUS/4-20 mA/0-1 V
• Internal autcalibration tvalidate automatically the data

It is possible tmonitor specific WWTP odors at emission and at environment. The specification allows you tidentify origins of the odor (odor calculation based on odor threshold determined by scientist).

Option:

Data Reporting and modeling Software

• Real Time Odor Dispersion Modeling
• Online Registration of Complains
• Recalculation of Odor
• Concentration at Specific Location & Time

Multi stream: (2 t12 streams control by analyzer)
Meteorological Station: wind direction and speed, temperature, relative humidity;
Confirmation / adjustment Uby olfactometry on site.

Results

The instrument monitors ambient odors inside and outside waste water treatment plant. One instrument with inbuilt computer supervises meteorological station, TRS MEDOR analyzer, calculate odor unit and communicate data tthe modelling software.

Conclusion:

TRS MEDOR, the adequate solution for in situ sulfur analysis and odor monitoring for surveillance of wastewater treatment plant:

• Fully automated with gas generator (N2 or Air/Calibration gas)
• Data transfer ta data logger or by modem or Ethernet
• Stability and repeatability (from 1 ppb t1000 ppm, areas and retention times)
• Linearity (from 1 ppb t1000 ppm)
• In compliance with IS6326/2 norm and DIN 51855/7, ninterferences
• Approval on sulfurs (ASTM D7493-08 2008)
• In standard, TRS MEDOR analyzes 7 compounds H2S,SO2,MM,EM,DMS,DES and DMDS
• In option up t14 sulfurs THT, H2S, SO2, MM, EM, DMS, IPM, TBM, NPM, MES, 2BM, DES, NBM and DMDS.
• NEW: manage meteorological station and communicate with odor modelling software
• OPTION ppt range with a pre concentration trap for DMS/DES and DMDS