BVT-Merkblatt zu Abwasser- und Abgasbehandlung

Annexes
vii. if requirements governing the site of occurrence of the waste water or prior to blending
are imposed in the applicable Appendices, then paragraphs iv and v shall remain unaffected.
The requirements refer to the point at which the waste water is discharged into the waterbody
and, when specified in the appendices to this ordinance, also to the site of occurrence of the
waste water or the site prior to blending thereof. The point of discharge is synonymous with the
outlet from the waste water plant where the waste water was last treated. The site prior to
blending is also the point of discharge into a public waste water plant.
If a level specified by this ordinance is not complied with based on the results of analysis
within the context of government monitoring, it shall nevertheless be deemed to have been met,
provided the results of this and the four preceding government analyses do not exceed the level
in four cases and no result exceeds the level by more than 100 %. Analyses conducted more
than three years ago shall be disregarded.
The productions of the specific sectors are covered by Annexesof this regulation. The relevant
annexes for the chemical sector are:
� Annex 22 (Chemical industry)
� Annex 36 (Production of hydrocarbons)
Appendix 22 on Chemical industry
“A. Scope of application
(1) This Appendix shall apply to waste water originating primarily from the production of substances
using chemical, biochemical or physical techniques, including the related pretreatment,
intermediate treatment and after-treatment.
(2) This Appendix shall not apply to waste water discharges of less than 10 m 3 per day.
(3) For waste water derived from formulation (i.e. the manufacture of substances and preparations
by blending, dissolving or bottling) which is discharged without being blended with other
waste water falling under the scope of application of this Appendix, only part B of this Appendix
shall apply.
B. General requirements
A permit for the discharge of waste water into waterbodies shall only be granted, subject to the
requirement that the contaminant load at the site of occurrence of the waste water is kept as low
as the following measures permit, after investigating the situation in each individual case:
­ Use of water-saving techniques, such as countercurrent washing
­ Multiple use and recirculation, e.g. with washing and purifying processes
­ Indirect cooling, e.g. to cool vapour phases instead of using jet condensers or jet coolers
­ The use of waste water-free techniques to generate vacuums and for waste air purification
­ The retention or recovery of substances via the preparation of mother liquor and by means
of optimised techniques
­ The use of low-pollutant raw and auxiliary materials.
Proof of compliance with the general requirements shall be furnished in the form of a waste
water register.
C. Requirements for waste water at the point of discharge
(1) The following requirements apply to the waste water at the point of discharge into the waterbody:
1. Chemical oxygen demand (COD)
a) For waste water flows whose COD concentration at the site of occurrence of waste
water is more than 50000 mg/l, a COD concentration of 2500 mg/l shall apply
412 Waste Water and Waste Gas Treatment