BVT-Merkblatt zu Abwasser- und Abgasbehandlung

Annexes
(4) Notwithstanding part D, the following AOX requirements shall apply to the following
waste water flows prior to blending with other waste water:
1. Waste water from the production of EDC, including further processing to VC: 5 g/t
(production capacity of purified EDC)
2. Waste water from the manufacture of PVC: 1 mg/l or 20 g/t
(5) The requirements concerning mutagenic potential (umu test) pursuant to part C, paragraph
(1) and TOC pursuant to part D, paragraph (5) shall not apply.”
Appendix 36 on Production of hydrocarbons
“A. Scope of application
(1) This Appendix shall apply to waste water whose contaminant load originates primarily
from the following areas of hydrocarbon production:
� The production of certain hydrocarbons, primarily olefin hydrocarbons, with 2 to 4 carbon
atoms, as well as benzene, toluene and xylene from mineral oil products by cracking with
the aid of steam (steam cracking)
� The production of pure hydrocarbons or certain blends of hydrocarbons from mineral oil
products using physical separation methods
� The conversion of hydrocarbons into other hydrocarbons using the chemical techniques of
hydration, dehydration, alkylation, dealkylation, hydrodealkylation, isomerisation or disproportionation.
This shall also include any precipitation water coming into contact with hydrocarbons in the
process area of the production plant.
(2) This Appendix shall not apply to waste water from the production of pure paraffins from
slack wax, from petroleum refining, from indirect cooling systems or from process water
treatment facilities.
B. General requirements
No requirements above and beyond Article 3 are imposed.
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:
Qualified random sample
or
2-hour composite sample
[mg/l]
Chemical oxygen demand (COD) 120
5-day biochemical oxygen demand (BOD5) 25
Total nitrogen as the sum of ammonia, nitrite and nitrate nitrogen
25
(Ntot)
Total phosphorous 1.5
Total hydrocarbons 2
(2) For COD, a concentration of up to 190 mg/l in the qualified random sample or 2-hour composite
sample may be conceded, provided the COD load is reduced by at least 80 % in a
central waste water treatment plant. The reduction in COD load refers to the ratio between
the COD load in the effluent of the gravity-type oil-water separator and that of the effluent
from the biological waste water treatment plant over a representative period of time not exceeding
24 hours.
(3) For total nitrogen, a higher concentration is permissible, provided the nitrogen load is reduced
by at least 75% in a central waste water treatment plant. The reduction in the nitrogen
load refers to the ratio between the nitrogen load of the effluent from the gravity-type
oil-water separator and that of the effluent from the biological waste water treatment plant
over a representative period of time which should not exceed 24 hours. Total bonded nitrogen
(TNb) should be used as a basis when calculating the loads.
Waste Water and Waste Gas Treatment 415