Bahno z odpadních vod, které má povolení k odstranění (v tunách) v letech 1990 - 1998
Source: Marlab
Year Quantity Quantity Cadmium Chromium Copper (2) Mercury (2) Nickel (2) Lead (2) Zinc (2)
licensed for dumped (1) (2) (2)
dumping (1)
1990 3,000,000 1,946,430 0.27 34 30 0.16 3 18 39
1991 3,000,000 1,984,035 0.24 35 41 0.10 3 20 44
1992 3,000,000 1,984,525 0.21 30 36 0.10 2 18 40
1993 3,000,000 1,946,340 0.19 18 26 0.07 3 18 35
1994 3,000,000 1,930,510 0.14 27 29 0.10 3 16 42
1995 3,000,000 1,919,950 0.18 25 25 0.08 4 18 52
1996 3,000,000 2,057,265 0.17 25 28 0.11 4 17 84
1997 3,000,000 2,078,579 0.11 24 29 0.11 4 17 101
1998 3,000,000 2,006,679 0.10 14 18 0.10 6 12 60
Footnotes
(1) Wet weight.
(2) Contaminant levels dumped.
SOURCE DETAILS
SOURCE Marine Laboratory Aberdeen (Marlab)
WEBSITE http://www.marlab.ac.uk/
CONTACT ADDRESS The Marine Laboratory,
PO Box 101,
Victoria Road,
Aberdeen,
AB11 9DB
TELEPHONE 01224 876544
FAX 01224 295511
EMAIL registry@marlab.ac.uk
DESCRIPTION Sewage sludge is one of the main categories of waste material that are disposed of by direct
dumping in the sea. This data shows the amount of sewage sludge licensed for direct dumping in
the sea, along with the amount dumped and the levels of contaminants contained in the dumped
material.
GEOGRAPHIC Scottish waters
COVERAGE
MEASURE Wet weight of sewage sludge licensed for disposal, levels of dumped contaminants: cadmium,
chromium, copper, mercury, nickel, lead and zinc.
UNITS Tonnes
START YEAR 1990
END YEAR 1998
FREQUENCY OF DATA Annual
PUBLICATION
LAST UPDATED July 2001
PROBABLE MONTH OF As sludge is no longer dumped at sea, this table will not be updated.
NEXT UPDATE
COMMENTARY
Background The deposit of substances or articles in the sea, other than discharges from a pipeline, is regulated by
licenses issued under the Food and Environment Protection Act (FEPA) 1985, Part II Deposits in the Sea
(as amended by the Environmental Protection Act 1990). Certain operations are exempt from licensing
under the Deposits in the Sea (Exemptions) Order 1985. In Scotland, the licensing function is
administered by the Marine Laboratory Aberdeen, a division of Fisheries Research Services which is an
Executive agency of SEERAD, on behalf of the Scottish Ministers.
The main categories of waste material that are disposed of by direct dumping in the sea are dredged
material, excavated from ports, harbours and navigation channels, and sewage sludge. The disposal of
sewage sludge into Scottish waters ceased at the end of 1998 under the Urban Waste Water Treatment
Directive (91/271/EEC). The Directive requires sludge to be reused whenever appropriate and for
disposal routes to minimise adverse environmental effects. The increasing volume of sludge being
produced and the ban on sea disposal is placing greater pressure on other disposal routes.
Trends The quantity of sewage sludge disposed by direct dumping at sea increased steadily from 1990 up to
1998. Over this time period the weight of two contaminants, nickel and zinc, also increased but there
were reductions in the amounts of other contaminants such as cadmium, chromium, copper and lead.
The amounts of contaminants in sewage sludge that were disposed in Scottish Waters were less than the
amounts of contaminants contained in dredged material (1).
References (1) Dredged material licensed for disposal in Scottish Waters. (See dataset in Coastal and Marine
Waters.)
SITE NAME DESCRIPTION ADDRESS
Scottish Executive (1999) Water Relevant legislation that applies to the http://www.scotland.gov.uk/library2/doc06/
Quality and Standards 2000-2002 disposal of sewage sludge is covered in wqs-08.htm
this report detailing investment priorities
for Scotland's Water Authorities: 2000-
2002.
Europa : the portal site of the Provides up-to-date coverage of European http://europa.eu.int/water/water-
European Union Affairs and current legislation, including urbanwaste/index_en.html
Directive 91/271/EEC on Urban Waste
Water Treatment.
The Marine Laboratory The Marine Laboratory Aberdeen, a http://www.marlab.ac.uk
division of Fisheries Research Services
which is an Executive agency of SEERAD.