10. Operating instructions
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The table below contains a list of substances which must not be disposed of in the wastewater
treatment system:
Solids or liquids which
should not be disposed
of via the sink or toilet:
Why not:
Correct disposal:
Ash
Does not break down
Dustbin
Chemicals
Contaminate the wastewater
Collection points
Disinfectants
Kill bacteria
Do not use
Paints
Contaminate the wastewater
Local collection point
Photochemicals
Contaminate the wastewater
Local collection point
Chip fat
Is deposited in pipes and causes blockages
Dustbin
Adhesive plaster
Blocks the pipes
Dustbin
Cat litter
Blocks the pipes
Dustbin
Cigarette butts
Are deposited in the system
Dustbin
Condoms
Blockages
Dustbin
Corks
Are deposited in the system
Dustbin
Varnishes
Contaminate the wastewater
Local collection point
Medicines
Contaminate the wastewater
Collection points, pharmacies
Engine oil
Contaminate the wastewater
Collection points, service stations
Waste containing oil
Contaminate the wastewater
Collection points, service stations
Plant protection agents
Contaminate the wastewater
Local collection point
Paintbrush cleaners
Contaminate the wastewater
Local collection point
Cleaning agents, except chlo-
rine-free products (environ-
mentally sound)
Contaminate the wastewater, corrode piping and
seals
Local collection point
Razor blades
Risk of injury to staff in the sewage system and
treatment plant
Dustbin
Pipe cleaners
Corrode piping and seals, contaminate the
wastewater
Local collection point
Pesticides
Contaminate the wastewater
Local collection point
Panty liners
Cause blockages, non-degradable plastic films
blight watercourses
Dustbin
Cooking oil
Cause deposits and pipe blockages
Local collection points