Organic pollutants in biological waste water treatment. Results of mass and tandem mass spectrometry of the flow injection mode compared with liquid chromatographic examinations: Polar compounds under positive ionization

1999 ◽  
Vol 50 (9-10) ◽  
pp. 583-595 ◽  
Author(s):  
H. Fr. Schröder ◽  
K. Fytianos
Keyword(s):  
Waste Water ◽  
Mass Spectrometry ◽  
Water Treatment ◽  
Tandem Mass Spectrometry ◽  
Waste Water Treatment ◽  
Polar Compounds ◽  
Tandem Mass ◽  
Treatment Results ◽  
Biological Waste Water Treatment ◽  
Liquid Chromatographic

Identification of Non-Biodegradable, Hydrophilic, Organic Substances in Industrial and Municipal Waste Water Treatment Plant-Effluents by Liquid Chromatography-Tandem Mass Spectrometry (LC/MS/MS)

1991 ◽  
Vol 23 (1-3) ◽  
pp. 339-347 ◽  
Author(s):  
H. Fr. Schröder
Keyword(s):  
Waste Water ◽  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Water Treatment ◽  
Tandem Mass Spectrometry ◽  
Waste Water Treatment ◽  
Tandem Mass ◽  
Column Separation ◽  
Chromatography Tandem Mass Spectrometry ◽  
Liquid Chromatography Tandem Mass

Effluents of biological waste water treatment plants containing high concentrations of non-biodegradable substances measured as COD (chemical oxygen demand) were analyzed by gas chromatography/mass spectrometry (GC/MS) and liquid chromatography/tandem mass spectrometry (LC/MS/MS). GC/MS could detect any relevant compound because of involatility of these substances. LC/MS/MS was able to give molecular weight information without any separation bypassing analytical column. Daughter- and parent-ions formed by MS/MS gave structural information by fragmentation under CID-conditions (collisionally induced dissociation) even for UV-non-detectable chromophor missing substances. Metabolites and anthropogenic, non-biodegradable substances such as polyether, nonionic alkyl-and arylsurfactants and benzene-sulfonic acid could be detected and identified after C 18 column separation and without any prior separation, bypassing column. Analysis without any separation could be done within a few minutes up to an hour, column separation lasted 10 to 100 fold longer.

New method for enhanced reactivation of anaerobic plants

2016 ◽  
pp. 36-39
Author(s):  
Hans-Joachim Jördening ◽  
Ralph-Matthias Schoth ◽  
Charlotte Pipper ◽  
Runi Egholm
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Control Problem ◽  
Waste Water Treatment ◽  
New Method ◽  
Treatment Results ◽  
Loading Rates ◽  
Drastic Increase ◽  
Expected Increase

A major problem in anaerobic waste-water treatment results from difficulties with the mixing of sludge, when it has settled after periods of standstill. A new method for reactivating those plants is discussed in this paper. In a technical anaerobic plant (volume 9600 m3) a control problem led to a breakdown of the process, connected with a drastic increase of the reactor COD. The load to the reactor was temporarily stopped to remove the inhibiting conditions. Restart with low loading rates and addition of new sludge did not lead to the expected increase in performance. The main problem was to suspend the sludge layer, which was settled on the bottom of the reactor. For activating the sludge layer feed “shots” were added up to three times per day. These shots consisted of volume streams of high loaded waste-water, up to five times bigger than the normal stream at that time and lasting for 1 h. The shots provided the sludge layer much better with substrate and caused biogas formation which itself led to a suspension of bacterial flocs. The same strategy was applied again successfully for reactivating a second anaerobic 10,000 m3 reactor.

scholarly journals Multi-Class Procedure for Analysis of Antibacterial Compounds in Eggs by Liquid Chromatography-Tandem Mass Spectrometry

2012 ◽  
Vol 56 (3) ◽  
pp. 321-327 ◽  
Author(s):  
Tomasz Błądek ◽  
Andrzej Posyniak ◽  
Anna Gajda ◽  
Małgorzata Gbylik ◽  
Jan Żmudzki
Keyword(s):  
Mass Spectrometry ◽  
Tandem Mass Spectrometry ◽  
Tandem Mass ◽  
Antibacterial Compounds ◽  
Official Control ◽  
Solvent Extraction Method ◽  
Liquid Chromatographic Method ◽  
Liquid Chromatography Tandem Mass ◽  
Oasis Hlb ◽  
Liquid Chromatographic

Abstract A liquid chromatographic method coupled with tandem mass spectrometry for determination of residues of β-lactams, macrolides, tetracyclines, quinolones, sulfonamides, and lincosamides in eggs has been described. Analytes were isolated from egg samples by solvent extraction method and extracts were cleaned by filtration on OASIS HLB cartridges. The whole procedure was validated according to European Commission Decision 2002/657/EC. The recovery ranged between 86% and 110%. The repeatability was below 16% and within-laboratory reproducibility was lower than 20%. The method was successfully applied in the official control of antibacterial compounds residue in Poland.

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