BVT-Merkblatt zu Abwasser- und Abgasbehandlung

Annexes
The ordinance “Verordnung über die Begrenzung von Abwasseremissionen aus der Herstellung
von anorganischen Düngemitteln sowie von Phosphorsäure und deren Salzen “ (BGBl.
1996/669) regulates the emission standards for the discharge of waste water from melamine and
urea production.
Emission standards for waste water from urea and melamine production
General parameters Standards for the discharge into Standards for the discharge into
surface water
the public sewerage system
Temperature 30 °C 35 °C
TF 4 No impairment of the public waste
water treatment plant
TSS 30 mg/l 150 mg/l
pH 6.5–8.5 6.5–9.5
Inorganic parameters Standards for the discharge into Standards for the discharge into
surface water
the public sewerage system
Ammonium (calculated
as N)
0.5 kg/t 0.5 kg/t
Nitrate (calculated as N) 0.5 kg/t 0.5 kg/t
Nitrite (calculated as N) 0.02 kg/t 0.02 kg/t
Organic parameters Standards for the discharge into Standards for the discharge into
surface water
the public sewerage system
COD (calculated as O2) 0.5 kg/t -
The emission standards are related to the installed production capacity of the plant (related to the tonne nitrogen in the
final product).
To meet the emission limits, four out of five successively measured values have to be lower than the emission limit and
only one measured value may exceed the emission limit (maximum 50 % of the emission limit). Most of the parameters
have to be determined with mass proportional homogeneous daily average samples. The parameters temperature, filter
out matter, pH and nitrite have to be determined with random samples.
2. BELGIUM
Flemish Legislation on Waste Water and Waste Gas in the Chemical Sector
In the Flemish environmental legislation, VLAREM, the chemical sector is classified under
different subsections:
� classification number 7 ‘Chemicals’
(see Annex 1)
� classification number 17 ‘Hazardous Substances’
(see Annex 2)
� classification number 20.4 ‘Chemical Industry, Industrial activities subject to 84/360/EEG’
(see Annex 3)
Chemical plants are subject to some sector-specific legislation that may differ from the general
environmental legislation specified in VLAREM:
� Vlarem II, Hoofdstuk 5.7 ‘Chemicals’ (classification number 7)
(see Annex 4)
� Vlarem II, Hoofdstuk 5.17 ‘Hazardous Substances’ (classification number 17)
(see Annex 5)
� Vlarem II, Hoofdstuk 5.20 ‘Industrial activities that can give rise to air pollution’ (classification
number 20)
(see Annex 6)
Waste Water and Waste Gas Treatment 357