BVT-Merkblatt zu Abwasser- und Abgasbehandlung

Annexes
Process water may only be discharged into an open system after degassing. The gaseous effluents
collected here must be cleaned by washing or incineration.
§ 5. As a derogation from § 1, the emission in the gaseous effluent of installations for the catalytic
cracking according to the 'fluid bed' procedure with the regeneration of the catalyst may
not exceed the following emission limit value for suspended particulates:
1. until 1 January 2005: 300 mg/Nm 3 as monthly average
2. from 1 January 2005: 50 mg/Nm 3 as monthly average.
§ 6. The concentration of polychlorinated dibenzo-p-dioxins (PCDD’s) and polychlorinated
dibenzo-p-furans (PCDF’s), calculated according to article 5.2.3.1.5, § 6, expressed as
nanograms dioxin toxic equivalent per Nm 3 (ng TEQ/Nm 3 ), may not exceed a limit value of
0.5 ng TEQ/Nm 3 for all average values over a sampling period of at least 6 hours and a maximum
of 8 hours. The emission guide value is 0.1 ng TEQ/Nm 3 .
As a derogation from the provisions of the first subsection, the following applies for existing
establishments:
- an emission guide value of 0.4 ng TEQ/Nm 3 ;
- an emission limit value of 2.5 ng TEQ/Nm 3 as of 1 January 2002.
The aforementioned guide values must be striven for by the application of the best available
techniques.
The mass concentration of PCDD’s and PCDF’s is to be measured according to the requirements
referred to in the Belgian standard T95-R-NBN EN 1948-1, 2 or 3. This concentration is
to be measured at least once a year by an environmental expert accredited for these measurements.
This measurement is not compulsory for constituent flows which do not or do not significantly
contribute to the emissions. Unless specified otherwise in the environmental licence,
the omission of the measurements of specific constituent flows is only accepted providing that
this has been approved of in advance by the supervisory authority.
Each measurement performed according to the above-mentioned method must, after the calculation
of the accuracy as referred to in article 4.4.4.2, § 5, comply with the prescribed emission
limit value. If the measured concentration, after the calculation of the aforementioned accuracy,
exceeds the emission limit value, within three months new sampling and analysis will take
place.
Art. 5.20.2.3 Immission control procedures
§ 1. Without prejudice to the provisions of chapter 4.4, each time the weather conditions appear
unfavourable for the good dispersion of the combustion gases, in particular at the establishment,
the operator will take all necessary steps to maximally restrict the emissions of SO 2 as
well as of NO x from this installation.
§ 2. Each change of fuel, sulphur content of the liquid fuel, as well as the times of putting out of
use are recorded in a register that the operator keeps available to the official charged with supervision.
§ 3. When the total installed nominal thermal capacity at one establishment amounts to more
than 300 MW, in the surrounding area of the installations appliances for the measuring of the
immissions of SO 2 and NO 2 in the air at the ground will be installed and maintained at the operator’s
expense. The type, the place of measurement, the method of control and the other conditions
for use for the appliances are determined in the environmental licence.
§ 4. Without prejudice to the provisions of § 1, each time the average immission value over
24 hours measured with the equipment specified in § 3, amounts to more than 300 mg/m 3 for
SO2 and/or 150 mg/m 3 for NO2, the operator will take the steps prescribed in § 1, and maintain
these measures for as long as the measured average immission values over 24 hours of SO2 and
of NO2 amount to more than 300 mg/m 3 for SO2 and/or 150 mg/m 3 for NO2.
404 Waste Water and Waste Gas Treatment