RWZI E-PRTR monitoring

 
RWZI E-PRTR monitoring
 

Acronym

E-PRTR

01-09-07 untill 01-03-08

Client(s) & funding

STOWA

Objectives

To analyse effluents (and some influents and sludge samples) from selected RWZI’s for several priority pollutants

Summary

Effluents from 6 RWZI’s (both industrial and municipal loaded) as well as some influents and sludge samples were analysed by Omegam and IMARES. 24-h Samples were taken in six rounds to obtain average discharge data for each RWZI.
Co-contractor Omegam analysed compounds as pthalates, diuron, isoproturon, simazine, and bulk-parameters as AOX, EOX, N-organic, Ammonium, suspended matter, COD, Cyanides and Fluorides.
IMARES analysed the more apolar and also difficult to analyse compounds, for some of them no NEN or ISO methods are available. PBDE’s, hexa-PBB, toxaphene, lindane, chlordane, mirex were analysed by IMARES (accredited) methods while the method for chlordecon has been especially developed for this project. In addition other flame-retardants and OCP’s were analysed by IMARES as well. Special care was taken to analyse the whole sample (water and suspended particulate matter) and to obtain low detection limits.

The samples were received from September till end December.

The analysis showed that concentrations of the target compounds of IMARES were generally very low and below detection limits. Some compounds were regularly detected; the pesticide lindane (y-HCH), the flame retardants PBDE’s (poly brominated diphenyl ethers) and HCBD (hexabromo cyclododecane).
There were large differences between the effluent samples with respect to SPM. Additional clean-up procedures were required for some samples.  
From these data the average discharge per year per RWZI can be calculated. Data sofar indicate that none of the target compounds exceeds the regulatory limit. 

Staff involved

Michiel Kotterman, Alwin Kruijt, Christiaan Kwadijk, Gerda Booij, Marco Lohman and Judith van Hesselingen

Cooperation Partners

Omegam

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