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[...]Combined Sewerage and Stormwater Treatment Protection of water bodies from polluted rainwater The advanced treatment of combined and stormwater in wastewater transportation systems is a main issue with regard to sustainable environmental and water protection. The building of new wastewater treatment plants and the upgrading or refurbishing continuous wastewater discharges has significantly increased the quality of many watercourses. Nevertheless, despite all efforts, ecological deficits still exist. Some of the problems are caused in the discharges of combined and separated sewers during storm [...]

[...]Singapore[...]

[...]Access door for buildings in the field of potable water supply equipped with a burglar alarm system Security door, burglar and attack proof , certified to security of DIN EN 1627, resistance class RC3, ready for installation, double skinned, completely made from 1.4307 stainless steel (AISI 304 L), with double rubber seal, the door and frame closing flush, the door opening to the outside (in escape direction). Sound insulation: 34/29 dB . Security class RC3 is recommended by the criminal investigation department if the building is additionally secured by means of a burglar alarm system. Door leaf[...]

[...]Access door for buildings in the field of potable water supply without a burglar alarm system Security class RC4 is recommended by the criminal investigation department if the building is not secured by means of a burglar alarm system. Security door, burglar and attack proof , certified to security of DIN EN 1627, resistance class RC4, ready for installation, single-leaf, double skinned, completely made from 1.4307 stainless steel (AISI 304 L), with double rubber seal, the door and frame closing flush, the door opening to the outside (in escape direction). Sound insulation: 34/29 dB. Door leaf [...]

[...]Security door, burglar and attack proof, certified to security of DIN EN 1627, resistance class RC3, ready for installation, single-leaf, double skinned, watertight up to 1.2 m WG, completely made from 1.4307 (AISI 304 L) stainless steel, with double rubber seal, the door opening to the outside (in escape direction). Door with injected CFCs-free polyurethane hard foam insulation. Longitudinally ground surface finish, with rubber seal. The closed door engaging flush with the frame by means of solid anchor bolts engaging in the frame for four-point locking. Fastened to the frame with stable, [...]

[...]Access door for buildings in the field of potable water supply and wastewater disposal with average security requirements. Door, ready for installation , single door, double skinned, completely made from 1.4307 (AISI 304 L) stainless steel, with double rubber seal, the door and frame closing flush, the door opening to the outside (in escape direction). Door leaf , skin: 1 mm, 55 mm thick, with injected CFCs-free polyurethane hard foam insulation, longitudinally ground surface finish, with rubber seal. Fastened to the frame with stable maintenance-free hinge plates. Mortise dead lock according[...]

[...]Access door for water chambers, ready for installation, single door, double skinned Completely made from 1.4404 stainless steel (AISI 316 L), with double rubber seal. The door and frame closing flush, the door opening to the outside (in escape direction). Door leaf, skin: 1 mm , 55 mm thick, with injected CFCs-free polyurethane hard foam insulation, longitudinally ground surface finish, door seal certified to KTW and DVGW W270 standards. Fastened to the frame with stable maintenance-free hinge plates. Mortise dead lock completely made from stainless steel according to DIN 18251, class 3, provided[...]

[...]Access door for buildings in potable water supply where chlorine gas is stored or used Chlorine room door, ready for installation, single door, double skinned, completely made from 1.4404 (AISI 316 L) stainless steel, with double rubber seal, the door and frame closing flush, the door opening to the outside (in escape direction), in accordance with UVV and DVGW standards. Door, skin: 1 mm , 55 mm thick, with injected CFCs-free polyurethane hard foam insulation, longitudinally ground surface finish, door inside lacquered in RAL 9006 (stainless steel look), with rubber seal. Fastened to the frame[...]

[...]Sliding hatch cover, completely made of 1.4307 (AISI 304 L) stainless steel, with smooth finish. The sliding cover provides access to downward leading stairs. The cover is made of a stable stainless steel plate and equipped with plastic rollers and maintenance-free journal bearings. The cover is installed in an external guide rail and cannot be removed. Locking when closed is possible by a cylindrical lock. The rails consist of 60/40/2 mm rectangular section fixed with dowels along the rail edge. Manhole cover and rails shielded arc-welded, acid-treated in a pickling bath and passivated. Operating[...]

[...]Solutions for cost-efficient sludge dewatering Sewage sludge produced in municipal and industrial wastewater treatment plants requires dewatering prior to further treatment or utilisation. Rising costs for sludge disposal make it necessary to concentrate the sludge to a high solids content. Mechanical sludge dewatering is used to reduce the amount of sludge by separating sludge water. A more or less firm sludge cake is produced. Prior to its dewatering, fed sludge is first flocculated by addition of polymers (sludge conditioning). Sludge Conditioning Economic Sludge Dewatering For the economic [...]