The Vertical Flow constructed Wetlands were constructed according to the Danish construction guidelines and consist of one meter deep sand-filled specific sand granularity) planted beds (with Parameterization’s) with a surface area of around mom. The Danish EPA guidelines approve the system as an SO class meaning that are effective removing organic matter and intriguing. Parameterization’s Parasites, the common reed, is a large perennial grass found in wetlands throughout temperate and tropical regions of the world.
Concept: phototypesetting water treatment Waste water from lavatories and greater from kitchens is routed to an underground septic tank-like compartment where the solid waste is allowed o settle out. The water then trickles through a constructed wetland or artificial reed bed, where premeditation bacterial action on the surface of roots and leaf litter removes some of the nutrients in beatifications. The water is then suitable for irrigation, groundwater recharge, or release to natural watercourses.
Activated Sludge Treatment ; Since 20th century ; Secondary treatment ; Involves treating the liquid part of the wastewater biologically. It is carried out after primary treatment (which removes some of the solid material) The purpose of this process is to remove the organic matter (and N, P) from the wastewater by bacteria in suspension So far the mostly widely used biological process for the treatment of municipal and industrial wastewater in developed countries The aeration tank contains a suspension Of the wastewater and microorganisms, the mixed liquor.
The liquor is mixed by aeration devices (supplying also oxygen) A portion of the biological sludge separated from the secondary effluent by sedimentation is recycled to the aeration tank Basic activated sludge process flow sheet Advantages/Disadvantages: Divan takes Flexible, can adapt to minor pH, organic and temperature changes Small area required Degree of nitrification is controllable Relatively minor odor problems Disadvantages High operating costs (skilled labor, electricity, etc. Generates solids requiring sludge disposal Some process alternatives are sensitive to shock loads and metallic or other poisons Requires continuous air supply Waste water in Denmark is handled by around 1,400 water treatment plants before it is released back into nature. Denmark is highly acclaimed internationally for its In-depth know how, technology and solutions within the fields of water management, pumps, sewage treatment and desalination.