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2.4.2.3 Waste water emissions
[31, European Commission, 2003]
Chapter 2
Table 2.10 gives an overview of the sources of waste water streams, possible contaminants and
the relevant parameters.
Mother liquors and initial wash-waters contribute up to 90 % of the contaminant loads, although
their share of the total volume is only about 10 to 30 %. Toxicity/inhibition and bioeliminability
are key parameters for functionality and the performance of biological treatment plants.
Main sources
Other sources
Contaminants
Relevant
parameters
Mother liquors from processing products
Wash-water the from purification of products
Vapour condensates
Quench water
Waste water streams from the treatment of exhaust gases or flue-gas treatment
(scrubbers)
Waste water streams from rinsing and cleaning
Contaminated water from vacuum generation
Conditioning of utility water, bleed from boiler feed-water systems, blowdown
from cooling cycles, back-washing of filters, laboratory or pilot scale plants,
sanitation waste water, rainwater from contaminated surfaces, landfill leachates
Non-reacted starting material
Production residues
Auxiliaries
Intermediate compounds
Unwanted by-products
General Toxicity
COD/TOC, BOD, bioeliminability, AOX (also
EOX), toxicity, persistency, bioaccumulation;
Organic load
for Whole Effluent Assessment (WEA) see
Section 4.3.8.19
Inorganic load Heavy metals, NH4-N, inorganic N
Individual substances Solvents, priority substances, POPs
P-total, N-total, pH, hydraulic load,
Other
temperature
Causes for high loads
COD/TOC, BOD, AOX
Organic compounds, soluble in water or
miscible with water
Low bioeliminability See Section 2.4.2.4
AOX
Halogenated starting materials, halogenated
solvents, halogenation products
Heavy metals
Heavy metals as reactants, catalysts or
incorporated in organic compounds
Table 2.10: Overview of the sources of waste water streams, contaminants and relevant parameters
OFC_BREF Dezember 2005 37